{"pageNumber":"319","pageRowStart":"7950","pageSize":"25","recordCount":16506,"records":[{"id":70185124,"text":"70185124 - 2003 - Spatial variability of groundwater recharge and its effect on shallow groundwater quality in southern New Jersey","interactions":[],"lastModifiedDate":"2017-03-15T11:12:44","indexId":"70185124","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3674,"text":"Vadose Zone Journal","active":true,"publicationSubtype":{"id":10}},"title":"Spatial variability of groundwater recharge and its effect on shallow groundwater quality in southern New Jersey","docAbstract":"<p><span>Point estimates of groundwater recharge at 48 sediment-coring locations vary substantially (−18.5–1840 cm yr</span><sup>−1</sup><span>) in a 930-km</span><sup>2</sup><span> area of southern New Jersey. Darcian estimates of steady, long-term recharge made at depth in the unsaturated zone were estimated using pedotransfer functions of soil texture and interpolated (mapped) with nonparametric methods to assess aquifer vulnerability in the area. The probability of exceeding the median recharge (29.1 cm yr</span><sup>−1</sup><span>) is low in the southwestern and northeastern portions of the study area and high in the eastern and southeastern portions. Estimated recharge is inversely related to measured percentage clay and positively related to the percentage of well-drained soils near wells. Spatial patterns of recharge estimates, exceedance probabilities, and clay content indicate that sediment texture controls recharge in the study area. Relations with land elevation and a topographic wetness index were statistically insignificant. Nitrate concentration and atrazine (6-chloro-</span><i>N</i> <sup>2</sup><span>-ethyl-</span><i>N</i> <sup>4</sup><span>-isopropyl-1,3,5-triazine-2,4-diamine) percentage detection in samples of shallow groundwater (typically &lt;10 m) are higher for low recharge sites (≤29.1 cm yr</span><sup>−1</sup><span>) than for high recharge sites (&gt;29.1 cm yr</span><sup>−1</sup><span>) in agricultural and urban areas. Differences between high and low recharge sites in these areas are highly significant for NO</span><sub>3</sub><span> concentration, but not for atrazine concentration.</span></p>","language":"English","publisher":"Soil Science Society","doi":"10.2136/vzj2003.6770","usgsCitation":"Nolan, B.T., Baehr, A.L., and Kauffman, L.J., 2003, Spatial variability of groundwater recharge and its effect on shallow groundwater quality in southern New Jersey: Vadose Zone Journal, v. 2, no. 4, p. 677-691, https://doi.org/10.2136/vzj2003.6770.","productDescription":"15 p. ","startPage":"677","endPage":"691","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":337595,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New Jersey","otherGeospatial":"Kirkwood-Cohansey aquifer","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -75.13824462890625,\n              39.823303697329386\n            ],\n            [\n              -75.17669677734375,\n              39.823303697329386\n            ],\n            [\n              -75.498046875,\n              39.54641191968671\n            ],\n            [\n              -75.1080322265625,\n              39.34067026099156\n            ],\n            [\n              -74.72351074218749,\n              39.68182601089365\n            ],\n            [\n              -75.13824462890625,\n              39.823303697329386\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"2","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"58ca52d2e4b0849ce97c86e0","contributors":{"authors":[{"text":"Nolan, Bernard T. 0000-0002-6945-9659 btnolan@usgs.gov","orcid":"https://orcid.org/0000-0002-6945-9659","contributorId":2190,"corporation":false,"usgs":true,"family":"Nolan","given":"Bernard","email":"btnolan@usgs.gov","middleInitial":"T.","affiliations":[{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true},{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true}],"preferred":true,"id":684434,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baehr, Arthur L.","contributorId":104523,"corporation":false,"usgs":true,"family":"Baehr","given":"Arthur","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":684435,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kauffman, Leon J. 0000-0003-4564-0362 lkauff@usgs.gov","orcid":"https://orcid.org/0000-0003-4564-0362","contributorId":1094,"corporation":false,"usgs":true,"family":"Kauffman","given":"Leon","email":"lkauff@usgs.gov","middleInitial":"J.","affiliations":[{"id":470,"text":"New Jersey Water Science Center","active":true,"usgs":true}],"preferred":true,"id":684436,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70185122,"text":"70185122 - 2003 - Peer reviewed: Characterizing aquatic dissolved organic matter","interactions":[],"lastModifiedDate":"2022-11-17T18:01:37.100899","indexId":"70185122","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Peer reviewed: Characterizing aquatic dissolved organic matter","docAbstract":"<p>Whether it causes aesthetic concerns such as color, taste, and odor; leads to the binding and transport of organic and inorganic contaminants; produces undesirable disinfection byproducts; provides sources and sinks for carbon; or mediates photochemical processes, the nature and properties of dissolved organic matter (DOM) in water are topics of significant environmental interest. DOM is also a major reactant in and product of biogeochemical processes in which the material serves as a carbon and energy source for biota and controls levels of dissolved oxygen, nitrogen, phosphorus, sulfur, numerous trace metals, and acidity. </p>","language":"English","publisher":"American Chemical Society","doi":"10.1021/es032333c","usgsCitation":"Leenheer, J.A., and Croue, J., 2003, Peer reviewed: Characterizing aquatic dissolved organic matter: Environmental Science & Technology, v. 37, no. 1, p. 18A-26A, https://doi.org/10.1021/es032333c.","productDescription":"9 p.","startPage":"18A","endPage":"26A","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":506154,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1021/es032333c","text":"Publisher Index Page"},{"id":337592,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"1","noUsgsAuthors":false,"publicationDate":"2003-01-01","publicationStatus":"PW","scienceBaseUri":"58ca52d2e4b0849ce97c86e2","contributors":{"authors":[{"text":"Leenheer, Jerry A.","contributorId":72420,"corporation":false,"usgs":true,"family":"Leenheer","given":"Jerry","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":684431,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Croue, Jean-Philippe","contributorId":189300,"corporation":false,"usgs":false,"family":"Croue","given":"Jean-Philippe","email":"","affiliations":[],"preferred":false,"id":684432,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70026355,"text":"70026355 - 2003 - Characterization of lake water and ground water movement in the littoral zone of Williams Lake, a closed-basin lake in North central Minnesota","interactions":[],"lastModifiedDate":"2018-11-19T09:21:07","indexId":"70026355","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"Characterization of lake water and ground water movement in the littoral zone of Williams Lake, a closed-basin lake in North central Minnesota","docAbstract":"<p><span>Williams Lake, Minnesota is a closed‐basin lake that is a flow‐through system with respect to ground water. Ground‐water input represents half of the annual water input and most of the chemical input to the lake. Chemical budgets indicate that the lake is a sink for calcium, yet surficial sediments contain little calcium carbonate. Sediment pore‐water samplers (peepers) were used to characterize solute fluxes at the lake‐water–ground‐water interface in the littoral zone and resolve the apparent disparity between the chemical budget and sediment data. Pore‐water depth profiles of the stable isotopes δ</span><sup>18</sup><span>O and δ</span><sup>2</sup><span>H were non‐linear where ground water seeped into the lake, with a sharp transition from lake‐water values to ground‐water values in the top 10 cm of sediment. These data indicate that advective inflow to the lake is the primary mechanism for solute flux from ground water. Linear interstitial velocities determined from δ</span><sup>2</sup><span>H profiles (316 to 528 cm/yr) were consistent with velocities determined independently from water budget data and sediment porosity (366 cm/yr). Stable isotope profiles were generally linear where water flowed out of the lake into ground water. However, calcium profiles were not linear in the same area and varied in response to input of calcium carbonate from the littoral zone and subsequent dissolution. The comparison of pore‐water calcium profiles to pore‐water stable isotope profiles indicate calcium is not conservative. Based on the previous understanding that 40–50 % of the calcium in Williams Lake is retained, the pore‐water profiles indicate aquatic plants in the littoral zone are recycling the retained portion of calcium. The difference between the pore‐water depth profiles of calcium and δ</span><sup>18</sup><span>O and δ</span><sup>2</sup><span>H demonstrate the importance of using stable isotopes to evaluate flow direction and source through the lake‐water–ground‐water interface and evaluate mechanisms controlling the chemical balance of lakes.&nbsp;</span></p>","language":"English","publisher":"Wiley","doi":"10.1002/hyp.1211","issn":"08856087","usgsCitation":"Schuster, P., Reddy, M., LaBaugh, J.W., Parkhurst, R., Rosenberry, D., Winter, T.C., Antweiler, R.C., and Dean, W., 2003, Characterization of lake water and ground water movement in the littoral zone of Williams Lake, a closed-basin lake in North central Minnesota: Hydrological Processes, v. 17, no. 4, p. 823-838, https://doi.org/10.1002/hyp.1211.","productDescription":"16 p.","startPage":"823","endPage":"838","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234080,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208368,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.1211"}],"country":"United States","state":"Minnesota","otherGeospatial":"Williams Lake ","volume":"17","issue":"4","noUsgsAuthors":false,"publicationDate":"2003-01-27","publicationStatus":"PW","scienceBaseUri":"5059f4cde4b0c8380cd4bf1a","contributors":{"authors":[{"text":"Schuster, P. F.","contributorId":30197,"corporation":false,"usgs":true,"family":"Schuster","given":"P. F.","affiliations":[],"preferred":false,"id":409144,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reddy, M.M.","contributorId":24363,"corporation":false,"usgs":true,"family":"Reddy","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":409143,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"LaBaugh, J. W.","contributorId":23484,"corporation":false,"usgs":true,"family":"LaBaugh","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":409141,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Parkhurst, R.S.","contributorId":73625,"corporation":false,"usgs":true,"family":"Parkhurst","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":409147,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Rosenberry, D.O. 0000-0003-0681-5641","orcid":"https://orcid.org/0000-0003-0681-5641","contributorId":38500,"corporation":false,"usgs":true,"family":"Rosenberry","given":"D.O.","affiliations":[],"preferred":true,"id":409145,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Winter, T. C.","contributorId":23485,"corporation":false,"usgs":true,"family":"Winter","given":"T.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":409142,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Antweiler, Ronald C. 0000-0001-5652-6034 antweil@usgs.gov","orcid":"https://orcid.org/0000-0001-5652-6034","contributorId":1481,"corporation":false,"usgs":true,"family":"Antweiler","given":"Ronald","email":"antweil@usgs.gov","middleInitial":"C.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":409146,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Dean, W.E.","contributorId":97099,"corporation":false,"usgs":true,"family":"Dean","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":409148,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70026306,"text":"70026306 - 2003 - Surface complexation and precipitate geometry for aqueous Zn(II) sorption on ferrihydrite: II. XANES analysis and simulation","interactions":[],"lastModifiedDate":"2018-11-16T09:52:16","indexId":"70026306","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Surface complexation and precipitate geometry for aqueous Zn(II) sorption on ferrihydrite: II. XANES analysis and simulation","docAbstract":"<p>X-ray absorption near-edge spectroscopy (XANES) analysis of sorption complexes has the advantages of high sensitivity (10- to 20-fold greater than extended X-ray absorption fine structure [EXAFS] analysis) and relative ease and speed of data collection (because of the short k-space range). It is thus a potentially powerful tool for characterization of environmentally significant surface complexes and precipitates at very low surface coverages. However, quantitative analysis has been limited largely to “fingerprint” comparison with model spectra because of the difficulty of obtaining accurate multiple-scattering amplitudes for small clusters with high confidence.</p><p>In the present work, calculations of the XANES for 50- to 200-atom clusters of structure from Zn model compounds using the full multiple-scattering code Feff 8.0 accurately replicate experimental spectra and display features characteristic of specific first-neighbor anion coordination geometry and second-neighbor cation geometry and number. Analogous calculations of the XANES for small molecular clusters indicative of precipitation and sorption geometries for aqueous Zn on ferrihydrite, and suggested by EXAFS analysis, are in good agreement with observed spectral trends with sample composition, with Zn-oxygen coordination and with changes in second-neighbor cation coordination as a function of sorption coverage. Empirical analysis of experimental XANES features further verifies the validity of the calculations. The findings agree well with a complete EXAFS analysis previously reported for the same sample set, namely, that octahedrally coordinated aqueous Zn<sup>2+</sup><span>&nbsp;</span>species sorb as a tetrahedral complex on ferrihydrite with varying local geometry depending on sorption density. At significantly higher densities but below those at which Zn hydroxide is expected to precipitate, a mainly octahedral coordinated Zn<sup>2+</sup>precipitate is observed. An analysis of the multiple scattering paths contributing to the XANES demonstrates the importance of scattering paths involving the anion sublattice. We also describe the specific advantages of complementary quantitative XANES and EXAFS analysis and estimate limits on the extent of structural information obtainable from XANES analysis.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/S0016-7037(02)01280-2","issn":"00167037","usgsCitation":"Waychunas, G., Fuller, C.C., Davis, J., and Rehr, J., 2003, Surface complexation and precipitate geometry for aqueous Zn(II) sorption on ferrihydrite: II. XANES analysis and simulation: Geochimica et Cosmochimica Acta, v. 67, no. 5, p. 1031-1043, https://doi.org/10.1016/S0016-7037(02)01280-2.","productDescription":"13 p.","startPage":"1031","endPage":"1043","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234399,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208572,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0016-7037(02)01280-2"}],"volume":"67","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9f9ae4b08c986b31e6df","contributors":{"authors":[{"text":"Waychunas, G.A.","contributorId":90888,"corporation":false,"usgs":true,"family":"Waychunas","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":408943,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fuller, C. C.","contributorId":29858,"corporation":false,"usgs":true,"family":"Fuller","given":"C.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":408940,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Davis, J.A.","contributorId":71694,"corporation":false,"usgs":true,"family":"Davis","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":408941,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rehr, J.J.","contributorId":75310,"corporation":false,"usgs":true,"family":"Rehr","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":408942,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70026143,"text":"70026143 - 2003 - Applicability of tetrazolium salts for the measurement of respiratory activity and viability of groundwater bacteria","interactions":[],"lastModifiedDate":"2018-11-19T09:12:29","indexId":"70026143","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2390,"text":"Journal of Microbiological Methods","active":true,"publicationSubtype":{"id":10}},"title":"Applicability of tetrazolium salts for the measurement of respiratory activity and viability of groundwater bacteria","docAbstract":"<div id=\"abstracts\" class=\"Abstracts\"><div id=\"aep-abstract-id8\" class=\"abstract author\"><div id=\"aep-abstract-sec-id9\"><p>A study was undertaken to measure aerobic respiration by indigenous bacteria in a sand and gravel aquifer on western Cape Cod, MA using tetrazolium salts and by direct oxygen consumption using gas chromatography (GC). In groundwater and aquifer slurries, the rate of aerobic respiration calculated from the direct GC assay was more than 600 times greater than that using the tetrazolium salt 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl tetrazolium chloride (INT). To explain this discrepancy, the toxicity of INT and two additional tetrazolium salts, sodium 3′-[1-(phenylamino)-carbonyl]-3,4-tetrazolium]-bis(4-methoxy-6-nitro) benzenesulfonic acid hydrate (XTT) and 5-cyano-2,3-ditolyl tetrazolium chloride (CTC), to bacterial isolates from the aquifer was investigated. Each of the three tetrazolium salts was observed to be toxic to some of the groundwater isolates at concentrations normally used in electron transport system (ETS) and viability assays. For example, incubation of cells with XTT (3 mM) caused the density of four of the five groundwater strains tested to decline by more than four orders of magnitude. A reasonable percentage (&gt;57%) of cells killed by CTC and INT contained visible formazan crystals (the insoluble, reduced form of the salts) after 4 h of incubation. Thus, many of the cells reduced enough CTC or INT prior to dying to be considered viable by microscopic evaluation. However, one bacterium (<i>Pseudomonas fluorescens</i>) that remained viable and culturable in the presence of INT and CTC, did not incorporate formazan crystals into more than a few percent of cells, even after 24 h of incubation. This strain would be considered nonviable based on traditional tetrazolium salt reduction assays. The data show that tetrazolium salt assays are likely to dramatically underestimate total ETS activity in groundwater and, although they may provide a reasonable overall estimate of viable cell numbers in a community of groundwater bacteria, some specific strains may be falsely considered nonviable by this assay due to poor uptake or reduction of the salts.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/S0167-7012(02)00132-X","issn":"01677012","usgsCitation":"Hatzinger, P., Palmer, P., Smith, R.L., Penarrieta, C., and Yoshinari, T., 2003, Applicability of tetrazolium salts for the measurement of respiratory activity and viability of groundwater bacteria: Journal of Microbiological Methods, v. 52, no. 1, p. 47-58, https://doi.org/10.1016/S0167-7012(02)00132-X.","productDescription":"12 p.","startPage":"47","endPage":"58","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234625,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208700,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0167-7012(02)00132-X"}],"country":"United States","state":"Massachusetts ","otherGeospatial":"Cape Cod","volume":"52","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec82e4b0c8380cd492ef","contributors":{"authors":[{"text":"Hatzinger, P.B.","contributorId":12663,"corporation":false,"usgs":true,"family":"Hatzinger","given":"P.B.","affiliations":[],"preferred":false,"id":408096,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Palmer, P.","contributorId":57634,"corporation":false,"usgs":true,"family":"Palmer","given":"P.","email":"","affiliations":[],"preferred":false,"id":408098,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, R. L.","contributorId":93904,"corporation":false,"usgs":true,"family":"Smith","given":"R.","email":"","middleInitial":"L.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":408100,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Penarrieta, C.T.","contributorId":63205,"corporation":false,"usgs":true,"family":"Penarrieta","given":"C.T.","email":"","affiliations":[],"preferred":false,"id":408099,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Yoshinari, T.","contributorId":56391,"corporation":false,"usgs":true,"family":"Yoshinari","given":"T.","affiliations":[],"preferred":false,"id":408097,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70026105,"text":"70026105 - 2003 - Nitrogen limitation of growth and nutrient dynamics in a disturbed mangrove forest, Indian River Lagoon, Florida","interactions":[],"lastModifiedDate":"2021-08-22T17:52:22.183734","indexId":"70026105","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2932,"text":"Oecologia","active":true,"publicationSubtype":{"id":10}},"title":"Nitrogen limitation of growth and nutrient dynamics in a disturbed mangrove forest, Indian River Lagoon, Florida","docAbstract":"<p><span>The objectives of this study were to determine effects of nutrient enrichment on plant growth, nutrient dynamics, and photosynthesis in a disturbed mangrove forest in an abandoned mosquito impoundment in Florida. Impounding altered the hydrology and soil chemistry of the site. In 1997, we established a factorial experiment along a tree-height gradient with three zones, i.e., fringe, transition, dwarf, and three fertilizer treatment levels, i.e., nitrogen (N), phosphorus (P), control, in Mosquito Impoundment 23 on the eastern side of Indian River. Transects traversed the forest perpendicular to the shoreline, from a&nbsp;</span><i>Rhizophora mangle</i><span>-dominated fringe through an&nbsp;</span><i>Avicennia germinans</i><span>&nbsp;stand of intermediate height, and into a scrub or dwarf stand of&nbsp;</span><i>A. germinans</i><span>&nbsp;in the hinterland. Growth rates increased significantly in response to N fertilization. Our growth data indicated that this site is N-limited along the tree-height gradient. After 2&nbsp;years of N addition, dwarf trees resembled vigorously growing saplings. Addition of N also affected internal dynamics of N and P and caused increases in rates of photosynthesis. These findings contrast with results for a&nbsp;</span><i>R. mangle</i><span>-dominated forest in Belize where the fringe is N-limited, but the dwarf zone is P-limited and the transition zone is co-limited by N and P. This study demonstrated that patterns of nutrient limitation in mangrove ecosystems are complex, that not all processes respond similarly to the same nutrient, and that similar habitats are not limited by the same nutrient when different mangrove forests are compared.</span></p>","language":"English","publisher":"Springer","doi":"10.1007/s00442-002-1117-z","issn":"00298549","usgsCitation":"Feller, I., Whigham, D., McKee, K., and Lovelock, C.E., 2003, Nitrogen limitation of growth and nutrient dynamics in a disturbed mangrove forest, Indian River Lagoon, Florida: Oecologia, v. 134, no. 3, p. 405-414, https://doi.org/10.1007/s00442-002-1117-z.","productDescription":"10 p.","startPage":"405","endPage":"414","costCenters":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"links":[{"id":388320,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[-82.821585,27.964443],[-82.829801,27.968469],[-82.823063,28.044758],[-82.836326,28.073193],[-82.830525,28.085293],[-82.826125,28.083793],[-82.813435,28.03716],[-82.815168,28.012547],[-82.821755,28.002494],[-82.815168,27.973721],[-82.821585,27.964443]]],[[[-81.582923,24.658732],[-81.562917,24.692912],[-81.535323,24.67954],[-81.51898,24.687818],[-81.5124,24.703737],[-81.476642,24.711244],[-81.469275,24.704286],[-81.459043,24.707355],[-81.451881,24.714518],[-81.456588,24.740097],[-81.451267,24.747464],[-81.432032,24.722908],[-81.421595,24.737641],[-81.430599,24.747259],[-81.425483,24.752989],[-81.392947,24.743371],[-81.38558,24.726182],[-81.36041,24.708788],[-81.319282,24.701238],[-81.309664,24.665017],[-81.298028,24.656774],[-81.332831,24.639528],[-81.395096,24.621062],[-81.401946,24.623564],[-81.403319,24.640294],[-81.414187,24.647167],[-81.448623,24.640172],[-81.470411,24.641985],[-81.480951,24.645121],[-81.47641,24.653197],[-81.480504,24.659757],[-81.49858,24.66498],[-81.505585,24.654609],[-81.511165,24.625135],[-81.54645,24.614895],[-81.602998,24.586444],[-81.664209,24.573143],[-81.685278,24.558739],[-81.81289,24.546468],[-81.814446,24.56358],[-81.811386,24.56975],[-81.800676,24.570989],[-81.794057,24.586],[-81.739241,24.589973],[-81.730473,24.58196],[-81.705364,24.597647],[-81.687017,24.592534],[-81.655735,24.616295],[-81.637087,24.621408],[-81.614829,24.642764],[-81.614529,24.650584],[-81.582923,24.658732]]],[[[-82.15068,24.576331],[-82.143075,24.593395],[-82.125268,24.597426],[-82.104187,24.588256],[-82.099417,24.572522],[-82.116787,24.549144],[-82.159439,24.548212],[-82.165206,24.552159],[-82.164426,24.563375],[-82.15068,24.576331]]],[[[-81.249799,24.673357],[-81.243232,24.673998],[-81.244761,24.669202],[-81.281778,24.65375],[-81.260006,24.674848],[-81.249799,24.673357]]],[[[-80.909954,24.781154],[-80.906288,24.769867],[-80.912042,24.76505],[-80.938543,24.767535],[-81.015933,24.719881],[-81.023794,24.716901],[-81.032447,24.727323],[-81.064554,24.715453],[-81.075855,24.704266],[-81.078439,24.692382],[-81.108041,24.688592],[-81.125371,24.708291],[-81.066816,24.723926],[-81.041797,24.742965],[-81.016918,24.734676],[-80.960129,24.764226],[-80.909954,24.781154]]],[[[-81.317673,24.75729],[-81.305468,24.756612],[-81.290801,24.736862],[-81.288259,24.720881],[-81.302984,24.714199],[-81.310744,24.727068],[-81.326844,24.728375],[-81.357417,24.756834],[-81.342695,24.75625],[-81.324637,24.76721],[-81.317673,24.75729]]],[[[-80.89054,24.791678],[-80.884572,24.791561],[-80.906874,24.783744],[-80.89054,24.791678]]],[[[-80.788263,24.824218],[-80.796053,24.81194],[-80.822342,24.812629],[-80.850338,24.8026],[-80.79278,24.843918],[-80.780564,24.84052],[-80.788263,24.824218]]],[[[-80.729275,24.865361],[-80.719977,24.864644],[-80.691762,24.885759],[-80.690354,24.881539],[-80.71185,24.863323],[-80.766966,24.836158],[-80.729275,24.865361]]],[[[-84.777208,29.707398],[-84.729836,29.738881],[-84.696726,29.76993],[-84.694939,29.761844],[-84.713747,29.74139],[-84.776954,29.692191],[-84.884632,29.652248],[-84.957779,29.612635],[-85.051033,29.586928],[-85.097082,29.625215],[-85.023501,29.597073],[-85.017205,29.604379],[-84.968314,29.617238],[-84.920333,29.648638],[-84.813352,29.687028],[-84.777208,29.707398]]],[[[-85.156415,29.679628],[-85.114268,29.688658],[-85.093902,29.684838],[-85.077237,29.670862],[-85.097218,29.633004],[-85.124913,29.628433],[-85.18453,29.663987],[-85.222546,29.678039],[-85.184776,29.68271],[-85.156415,29.679628]]],[[[-82.255777,26.703437],[-82.255159,26.70816],[-82.246535,26.706435],[-82.24251,26.694361],[-82.246535,26.683437],[-82.218342,26.626407],[-82.214337,26.602944],[-82.177541,26.502328],[-82.166042,26.489679],[-82.149368,26.477605],[-82.120046,26.473581],[-82.088423,26.455182],[-82.076924,26.466106],[-82.062551,26.470131],[-82.038403,26.456907],[-82.013913,26.452058],[-82.063114,26.425459],[-82.082915,26.422059],[-82.126671,26.436279],[-82.177017,26.471558],[-82.186441,26.489221],[-82.205523,26.566536],[-82.222131,26.590402],[-82.238872,26.636433],[-82.268007,26.682791],[-82.264351,26.698496],[-82.255777,26.703437]]],[[[-80.250581,25.34193],[-80.351399,25.190615],[-80.349855,25.168825],[-80.377084,25.130487],[-80.399767,25.108536],[-80.428318,25.095547],[-80.443375,25.076084],[-80.47387,25.060253],[-80.493881,25.038502],[-80.48912,25.031301],[-80.494781,25.023019],[-80.537995,24.990244],[-80.565831,24.958155],[-80.611693,24.93842],[-80.635571,24.913003],[-80.659395,24.897433],[-80.660198,24.90498],[-80.641306,24.914311],[-80.623866,24.931236],[-80.621658,24.944265],[-80.581131,24.964738],[-80.570813,24.962215],[-80.558785,24.971505],[-80.54411,24.999916],[-80.545971,25.01477],[-80.524498,25.016945],[-80.509136,25.028317],[-80.495569,25.047497],[-80.460652,25.078904],[-80.465496,25.086609],[-80.494715,25.102269],[-80.484188,25.10943],[-80.47748,25.107407],[-80.476174,25.099454],[-80.450399,25.088751],[-80.433575,25.106317],[-80.446473,25.151287],[-80.41326,25.137053],[-80.395467,25.150694],[-80.387164,25.170859],[-80.391909,25.19221],[-80.369965,25.206444],[-80.3498,25.210595],[-80.337345,25.231353],[-80.336159,25.261601],[-80.368186,25.282359],[-80.339421,25.290069],[-80.328746,25.28651],[-80.292567,25.314385],[-80.275961,25.344039],[-80.256982,25.361239],[-80.246307,25.398603],[-80.21428,25.416988],[-80.192336,25.473331],[-80.188778,25.50773],[-80.174544,25.518406],[-80.173951,25.482821],[-80.184033,25.468587],[-80.204198,25.412244],[-80.221991,25.397417],[-80.240376,25.347005],[-80.250581,25.34193]]],[[[-83.309455,30.634417],[-82.214839,30.568591],[-82.231916,30.55627],[-82.23582,30.537187],[-82.226933,30.510281],[-82.201416,30.485164],[-82.210291,30.42459],[-82.19294,30.378779],[-82.165192,30.358035],[-82.104834,30.368319],[-82.094687,30.360781],[-82.068533,30.359184],[-82.050069,30.362338],[-82.036825,30.377884],[-82.04199,30.403266],[-82.034005,30.422357],[-82.037209,30.434518],[-82.017779,30.475081],[-82.018361,30.531184],[-82.005477,30.563495],[-82.015708,30.601704],[-82.026941,30.606153],[-82.028499,30.621829],[-82.049507,30.655548],[-82.050432,30.676266],[-82.036426,30.706585],[-82.043795,30.729641],[-82.039634,30.747727],[-82.01266,30.761289],[-82.024035,30.783156],[-82.017051,30.791657],[-82.007865,30.792937],[-81.981273,30.776767],[-81.973856,30.778487],[-81.962534,30.796526],[-81.962175,30.818001],[-81.949787,30.827493],[-81.910926,30.815889],[-81.89572,30.821098],[-81.868608,30.792754],[-81.852626,30.794439],[-81.842058,30.78712],[-81.808529,30.790014],[-81.792769,30.784432],[-81.782653,30.769937],[-81.763372,30.77382],[-81.719927,30.744634],[-81.694778,30.748414],[-81.688925,30.741434],[-81.672824,30.738935],[-81.664598,30.746599],[-81.652123,30.742435],[-81.65177,30.732284],[-81.646137,30.727591],[-81.625098,30.733017],[-81.617663,30.722046],[-81.609495,30.720705],[-81.601206,30.728141],[-81.542675,30.713593],[-81.530531,30.722858],[-81.489537,30.7261],[-81.472597,30.713312],[-81.444124,30.709714],[-81.42742,30.69802],[-81.443099,30.600938],[-81.442564,30.555189],[-81.434064,30.522569],[-81.447087,30.503679],[-81.440108,30.497678],[-81.42601,30.496739],[-81.410809,30.482039],[-81.407008,30.42204],[-81.397422,30.400626],[-81.396407,30.34004],[-81.385505,30.273841],[-81.308978,29.96944],[-81.295268,29.928614],[-81.270442,29.883106],[-81.256711,29.784693],[-81.240924,29.739218],[-81.163581,29.55529],[-80.966176,29.14796],[-80.709725,28.756692],[-80.574868,28.585166],[-80.560973,28.530736],[-80.525094,28.459454],[-80.526732,28.451705],[-80.562877,28.437779],[-80.587813,28.410856],[-80.606874,28.336484],[-80.604214,28.257733],[-80.589975,28.17799],[-80.566432,28.09563],[-80.508871,27.970477],[-80.383695,27.740045],[-80.350553,27.628361],[-80.330956,27.597541],[-80.311757,27.524625],[-80.30117,27.500314],[-80.293171,27.500314],[-80.253665,27.37979],[-80.16147,27.192814],[-80.153375,27.169308],[-80.159554,27.163325],[-80.093909,27.018587],[-80.031362,26.796339],[-80.03212,26.77153],[-80.037462,26.76634],[-80.032862,26.700842],[-80.038863,26.569347],[-80.060564,26.444652],[-80.079865,26.264358],[-80.089365,26.231859],[-80.108995,26.088372],[-80.117778,25.986369],[-80.119684,25.841043],[-80.127987,25.772245],[-80.144,25.740812],[-80.154972,25.66549],[-80.160903,25.664897],[-80.176916,25.685062],[-80.166241,25.72895],[-80.184626,25.745557],[-80.197674,25.74437],[-80.240376,25.724206],[-80.267065,25.651849],[-80.296719,25.622195],[-80.305615,25.593134],[-80.302057,25.567632],[-80.313918,25.539164],[-80.328746,25.53264],[-80.339421,25.499427],[-80.337049,25.465621],[-80.328152,25.443084],[-80.320442,25.437153],[-80.326373,25.422919],[-80.32578,25.39801],[-80.306801,25.384369],[-80.31036,25.3731],[-80.335269,25.338701],[-80.374116,25.31735],[-80.418872,25.235532],[-80.495341,25.199463],[-80.569124,25.190117],[-80.669236,25.137837],[-80.777499,25.135047],[-80.82653,25.160478],[-80.838227,25.174791],[-80.858167,25.176576],[-80.899459,25.162337],[-80.900559,25.139755],[-80.970727,25.134084],[-80.999176,25.124222],[-81.049308,25.128322],[-81.079859,25.118797],[-81.141024,25.163868],[-81.146737,25.193139],[-81.171265,25.221609],[-81.16207,25.289833],[-81.148915,25.318067],[-81.151916,25.324766],[-81.140099,25.341117],[-81.12141,25.33875],[-81.117265,25.354953],[-81.128492,25.380511],[-81.150508,25.387255],[-81.146765,25.407577],[-81.168652,25.463848],[-81.208201,25.504937],[-81.204389,25.538908],[-81.209321,25.548611],[-81.225557,25.55847],[-81.240519,25.599041],[-81.240677,25.613629],[-81.253951,25.638181],[-81.290328,25.687506],[-81.328935,25.717233],[-81.346078,25.721473],[-81.343984,25.747668],[-81.361875,25.772715],[-81.340406,25.786631],[-81.352731,25.822015],[-81.386127,25.839906],[-81.394476,25.851834],[-81.417536,25.864954],[-81.441391,25.863761],[-81.458487,25.868929],[-81.473992,25.888411],[-81.508979,25.884037],[-81.511762,25.89676],[-81.527665,25.901531],[-81.584519,25.888808],[-81.644553,25.897953],[-81.663821,25.885605],[-81.678287,25.845301],[-81.68954,25.85271],[-81.713172,25.897568],[-81.727086,25.907207],[-81.73195,25.931506],[-81.749724,25.960463],[-81.747834,25.994273],[-81.762439,26.00607],[-81.801663,26.088227],[-81.820675,26.236735],[-81.833142,26.294518],[-81.868983,26.378648],[-81.91171,26.427158],[-81.964212,26.457957],[-81.969509,26.476505],[-82.008961,26.484052],[-82.01368,26.490829],[-82.00908,26.505203],[-82.024604,26.512677],[-82.043577,26.519577],[-82.06715,26.513252],[-82.07175,26.492554],[-82.105672,26.48393],[-82.111996,26.54085],[-82.137869,26.637441],[-82.181565,26.681712],[-82.17984,26.696661],[-82.173516,26.701836],[-82.139019,26.702986],[-82.125795,26.699536],[-82.106247,26.667339],[-82.099922,26.662739],[-82.093023,26.665614],[-82.084974,26.702411],[-82.066575,26.742657],[-82.061401,26.789228],[-82.055076,26.802452],[-82.059101,26.876621],[-82.090723,26.888694],[-82.093023,26.906518],[-82.090148,26.923191],[-82.061976,26.931241],[-82.063126,26.950214],[-82.076349,26.958263],[-82.107972,26.957688],[-82.117171,26.954239],[-82.137294,26.926066],[-82.162017,26.925491],[-82.175241,26.916867],[-82.156267,26.851898],[-82.147068,26.789803],[-82.151093,26.783479],[-82.172941,26.778879],[-82.17869,26.772555],[-82.221812,26.77198],[-82.232193,26.78288],[-82.251134,26.755881],[-82.259867,26.717398],[-82.269499,26.784674],[-82.289086,26.827784],[-82.351649,26.908384],[-82.445718,27.060634],[-82.477019,27.141231],[-82.539719,27.254326],[-82.569754,27.279452],[-82.569248,27.298588],[-82.597629,27.335754],[-82.642821,27.38972],[-82.691821,27.437218],[-82.714521,27.500415],[-82.745748,27.538834],[-82.708121,27.523514],[-82.710621,27.501715],[-82.706821,27.498415],[-82.686421,27.497215],[-82.683621,27.513115],[-82.674621,27.519614],[-82.65072,27.523115],[-82.632053,27.551908],[-82.612019,27.571231],[-82.611717,27.585283],[-82.584629,27.596021],[-82.570607,27.608882],[-82.558538,27.638678],[-82.514265,27.705588],[-82.494891,27.718963],[-82.477638,27.723004],[-82.482305,27.742649],[-82.434635,27.764355],[-82.418401,27.803187],[-82.402857,27.812671],[-82.393383,27.837519],[-82.402615,27.882602],[-82.413915,27.901401],[-82.451591,27.907506],[-82.460016,27.9116],[-82.462078,27.920066],[-82.478063,27.92768],[-82.491117,27.9145],[-82.488057,27.863566],[-82.46884,27.843295],[-82.47244,27.822559],[-82.511193,27.828015],[-82.553946,27.848462],[-82.552918,27.862702],[-82.538618,27.864901],[-82.529918,27.877501],[-82.542818,27.890601],[-82.531318,27.9039],[-82.533718,27.932999],[-82.553918,27.966998],[-82.576003,27.969424],[-82.62959,27.998474],[-82.678606,27.993715],[-82.684793,27.971824],[-82.720522,27.955798],[-82.724122,27.948098],[-82.720395,27.937199],[-82.710022,27.928299],[-82.691621,27.924899],[-82.685121,27.916299],[-82.628063,27.910397],[-82.63422,27.9037],[-82.63212,27.8911],[-82.61002,27.873501],[-82.567919,27.883701],[-82.566819,27.858002],[-82.598443,27.857582],[-82.586519,27.816703],[-82.622723,27.779868],[-82.63052,27.753905],[-82.62572,27.727006],[-82.63362,27.710607],[-82.652521,27.700307],[-82.677321,27.706207],[-82.679019,27.696054],[-82.713629,27.698661],[-82.718822,27.692007],[-82.721622,27.663908],[-82.712555,27.646647],[-82.698091,27.638858],[-82.705017,27.62531],[-82.733076,27.612972],[-82.739122,27.636909],[-82.738022,27.706807],[-82.746223,27.731306],[-82.760923,27.745205],[-82.783124,27.783804],[-82.828561,27.822254],[-82.846526,27.854301],[-82.851126,27.8863],[-82.840882,27.937162],[-82.831388,27.962117],[-82.824875,27.960201],[-82.821975,27.956868],[-82.838484,27.909111],[-82.832155,27.909242],[-82.805462,27.960201],[-82.792635,28.01116],[-82.792635,28.032307],[-82.782724,28.055894],[-82.781324,28.127591],[-82.790724,28.15249],[-82.808474,28.154803],[-82.805097,28.172181],[-82.797762,28.187789],[-82.762643,28.219013],[-82.764103,28.244345],[-82.759072,28.25402],[-82.746188,28.261192],[-82.732792,28.291933],[-82.73146,28.325075],[-82.706112,28.368057],[-82.706322,28.401325],[-82.697433,28.420166],[-82.684137,28.428019],[-82.674787,28.441956],[-82.680396,28.457194],[-82.665055,28.484434],[-82.669416,28.519879],[-82.656694,28.544814],[-82.66165,28.554143],[-82.654138,28.590837],[-82.664055,28.606584],[-82.674665,28.647588],[-82.668889,28.694302],[-82.712373,28.720921],[-82.698281,28.75701],[-82.730245,28.850155],[-82.688864,28.905609],[-82.702618,28.932955],[-82.723861,28.953506],[-82.735754,28.973709],[-82.737872,28.995703],[-82.758906,28.993277],[-82.764055,28.999707],[-82.753513,29.026496],[-82.759704,29.054192],[-82.783328,29.064619],[-82.780558,29.07358],[-82.816925,29.076215],[-82.823659,29.098902],[-82.801166,29.105103],[-82.799117,29.110647],[-82.805703,29.129848],[-82.804736,29.146624],[-82.827073,29.158425],[-82.974676,29.17091],[-82.991653,29.180664],[-83.018212,29.151417],[-83.019071,29.141324],[-83.030453,29.134023],[-83.053207,29.130839],[-83.056867,29.146263],[-83.068249,29.153135],[-83.061162,29.176113],[-83.087839,29.21642],[-83.074734,29.247975],[-83.077265,29.255331],[-83.089013,29.266502],[-83.107477,29.268889],[-83.128027,29.282733],[-83.169576,29.290355],[-83.17826,29.327916],[-83.175518,29.34469],[-83.200702,29.373855],[-83.202446,29.394422],[-83.218075,29.420492],[-83.240509,29.433178],[-83.272019,29.432256],[-83.294747,29.437923],[-83.311546,29.475666],[-83.33113,29.475594],[-83.356722,29.499901],[-83.370288,29.499901],[-83.379254,29.503558],[-83.383973,29.512995],[-83.400252,29.517242],[-83.405256,29.578319],[-83.39948,29.612956],[-83.414701,29.670536],[-83.436259,29.677389],[-83.455356,29.676444],[-83.483143,29.690478],[-83.483567,29.698542],[-83.493728,29.708388],[-83.537645,29.72306],[-83.566018,29.761434],[-83.584716,29.77608],[-83.585899,29.811754],[-83.595493,29.827984],[-83.618568,29.842336],[-83.63798,29.886073],[-83.679219,29.918513],[-83.788729,29.976982],[-83.82869,29.983187],[-83.845427,29.998068],[-83.93151,30.039068],[-83.931879,30.044175],[-83.991607,30.08392],[-84.000716,30.096209],[-84.024274,30.103271],[-84.06299,30.101378],[-84.083057,30.092286],[-84.10273,30.093611],[-84.11384,30.085478],[-84.124889,30.090601],[-84.167881,30.071422],[-84.179149,30.073187],[-84.19853,30.087937],[-84.237014,30.08556],[-84.247491,30.10114],[-84.256439,30.103791],[-84.272511,30.092358],[-84.270792,30.068094],[-84.277168,30.060263],[-84.297836,30.057451],[-84.315344,30.069492],[-84.358923,30.058224],[-84.365882,30.024588],[-84.361962,29.987739],[-84.3477,29.984123],[-84.343041,29.9751],[-84.333746,29.923721],[-84.343389,29.899539],[-84.349066,29.896812],[-84.378937,29.893112],[-84.423834,29.902996],[-84.443652,29.913785],[-84.451705,29.929085],[-84.494562,29.913957],[-84.511996,29.916574],[-84.535873,29.910092],[-84.603303,29.876117],[-84.647958,29.847104],[-84.65645,29.834277],[-84.692053,29.829059],[-84.755595,29.78854],[-84.868271,29.742454],[-84.881777,29.733882],[-84.888031,29.722406],[-84.901781,29.735723],[-84.877111,29.772888],[-84.893992,29.785176],[-84.90413,29.786279],[-84.91511,29.783303],[-84.93837,29.750211],[-84.964007,29.742422],[-84.968841,29.72708],[-84.993264,29.714961],[-85.037212,29.711074],[-85.072123,29.719027],[-85.121473,29.715854],[-85.177284,29.700193],[-85.22745,29.693633],[-85.259719,29.681296],[-85.319215,29.681494],[-85.343619,29.672004],[-85.347711,29.66719],[-85.344768,29.654793],[-85.380303,29.698485],[-85.397871,29.740498],[-85.413983,29.799865],[-85.417971,29.828855],[-85.413575,29.85294],[-85.405815,29.865817],[-85.392469,29.870914],[-85.405011,29.830151],[-85.405907,29.80193],[-85.37796,29.709621],[-85.353885,29.684765],[-85.317661,29.691286],[-85.31139,29.697557],[-85.302591,29.808094],[-85.31142,29.814373],[-85.317464,29.838894],[-85.336654,29.849295],[-85.363731,29.898915],[-85.405052,29.938487],[-85.425956,29.949888],[-85.487764,29.961227],[-85.509148,29.971466],[-85.571907,30.02644],[-85.588242,30.055543],[-85.601178,30.056342],[-85.69681,30.09689],[-85.775405,30.15629],[-85.9226,30.238024],[-86.089963,30.303569],[-86.222561,30.343585],[-86.2987,30.363049],[-86.412076,30.380346],[-86.50615,30.3823],[-86.632953,30.396299],[-86.750906,30.391881],[-86.909679,30.372423],[-87.206254,30.320943],[-87.267827,30.31548],[-87.295422,30.323503],[-87.518324,30.280435],[-87.452378,30.300201],[-87.450078,30.3111],[-87.50278,30.307301],[-87.504701,30.324039],[-87.49998,30.328957],[-87.459978,30.3363],[-87.452278,30.344099],[-87.451878,30.364999],[-87.438678,30.380798],[-87.440678,30.391498],[-87.429578,30.406498],[-87.403477,30.410198],[-87.366591,30.436648],[-87.370768,30.446865],[-87.399877,30.450997],[-87.425078,30.465596],[-87.434678,30.479196],[-87.431178,30.495795],[-87.447702,30.510458],[-87.446586,30.527068],[-87.43544,30.54914],[-87.418647,30.561837],[-87.406558,30.599928],[-87.397308,30.608728],[-87.393588,30.63088],[-87.397262,30.654351],[-87.406958,30.675165],[-87.449362,30.698913],[-87.466338,30.700835],[-87.481225,30.716508],[-87.502317,30.72159],[-87.511729,30.733535],[-87.532607,30.743489],[-87.545044,30.778666],[-87.581869,30.812403],[-87.600486,30.820627],[-87.605776,30.831304],[-87.615923,30.834693],[-87.634938,30.865886],[-87.592055,30.951492],[-87.589187,30.964464],[-87.599172,30.995722],[-87.571281,30.99787],[-85.998643,30.99287],[-85.002368,31.000682],[-85.004026,30.973468],[-84.980127,30.961286],[-84.983627,30.936986],[-84.971026,30.928187],[-84.936828,30.884683],[-84.935256,30.854328],[-84.928335,30.844263],[-84.936042,30.820671],[-84.928323,30.79309],[-84.918023,30.77809],[-84.920123,30.76599],[-84.914322,30.753591],[-84.896122,30.750591],[-84.864693,30.711542],[-83.309455,30.634417]]]]},\"properties\":{\"name\":\"Florida\",\"nation\":\"USA  \"}}]}","volume":"134","issue":"3","noUsgsAuthors":false,"publicationDate":"2003-01-08","publicationStatus":"PW","scienceBaseUri":"505a66e7e4b0c8380cd7306d","contributors":{"authors":[{"text":"Feller, Ilka C.","contributorId":79990,"corporation":false,"usgs":true,"family":"Feller","given":"Ilka C.","affiliations":[],"preferred":false,"id":407925,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whigham, D.F.","contributorId":33100,"corporation":false,"usgs":true,"family":"Whigham","given":"D.F.","affiliations":[],"preferred":false,"id":407923,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McKee, K.L. 0000-0001-7042-670X","orcid":"https://orcid.org/0000-0001-7042-670X","contributorId":77113,"corporation":false,"usgs":true,"family":"McKee","given":"K.L.","affiliations":[],"preferred":false,"id":407924,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lovelock, C. E.","contributorId":103450,"corporation":false,"usgs":true,"family":"Lovelock","given":"C.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":407926,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70026048,"text":"70026048 - 2003 - Characterizing aquatic health using salmonid mortality, physiology, and biomass estimates in streams with elevated concentrations of arsenic, cadmium, copper, lead, and zinc in the Boulder River Watershed, Montana","interactions":[],"lastModifiedDate":"2018-11-16T07:42:03","indexId":"70026048","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"Characterizing aquatic health using salmonid mortality, physiology, and biomass estimates in streams with elevated concentrations of arsenic, cadmium, copper, lead, and zinc in the Boulder River Watershed, Montana","docAbstract":"<p><span>Abandoned tailings and mine adits are located throughout the Boulder River watershed in Montana. In this watershed, all species of fish are absent from some tributary reaches near mine sources; however, populations of brook trout </span><i>Salvelinus fontitalis</i><span>, rainbow trout </span><i>Oncorhynchus mykiss</i><span>, and cut-throat trout </span><i>O. clarki</i><span> are found further downstream. Multiple methods must be used to investigate the effects of metals released by past mining activity because the effects on aquatic life may range in severity, depending on the proximity of mine sources. Therefore, we used three types of effects—those on fish population levels (as measured by survival), those on biomass and density, and those at the level of the individual (as measured by increases in metallothionein, products of lipid peroxidation, and increases in concentrations of tissue metals)—to assess the aquatic health of the Boulder River watershed. Elevated concentrations of Cd, Cu, and Zn in the water column were associated with increased mortality of trout at sites located near mine waste sources. The hypertrophy (swelling), degeneration (dying), and necrosis of epithelial cells observed in the gills support our conclusion that the cause of death was related to metals in the water column. At a site further downstream (lower Cataract Creek), we observed impaired health of resident trout, as well as effects on biomass and density (measured as decreases in the kilograms of trout per hectare and the number per 300 m) and effects at the individual level, including increases in metallothionein, products of lipid peroxidation, and tissue concentrations of metals.</span></p>","language":"English","publisher":"Taylor & Francis","doi":"10.1577/1548-8659(2003)132<0450:CAHUSM>2.0.CO;2","usgsCitation":"Farag, A.M., Skaar, D., Nimick, D.A., MacConnell, E., and Hogstrand, C., 2003, Characterizing aquatic health using salmonid mortality, physiology, and biomass estimates in streams with elevated concentrations of arsenic, cadmium, copper, lead, and zinc in the Boulder River Watershed, Montana: Transactions of the American Fisheries Society, v. 132, no. 3, p. 450-467, https://doi.org/10.1577/1548-8659(2003)132<0450:CAHUSM>2.0.CO;2.","productDescription":"18 p.","startPage":"450","endPage":"467","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234801,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208801,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1577/1548-8659(2003)132<0450:CAHUSM>2.0.CO;2"}],"volume":"132","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f4efe4b0c8380cd4bffb","contributors":{"authors":[{"text":"Farag, Aida M. 0000-0003-4247-6763 aida_farag@usgs.gov","orcid":"https://orcid.org/0000-0003-4247-6763","contributorId":1139,"corporation":false,"usgs":true,"family":"Farag","given":"Aida","email":"aida_farag@usgs.gov","middleInitial":"M.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":false,"id":407698,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Skaar, Don","contributorId":9171,"corporation":false,"usgs":true,"family":"Skaar","given":"Don","email":"","affiliations":[],"preferred":false,"id":407696,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nimick, David A. dnimick@usgs.gov","contributorId":421,"corporation":false,"usgs":true,"family":"Nimick","given":"David","email":"dnimick@usgs.gov","middleInitial":"A.","affiliations":[{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true},{"id":573,"text":"Special Applications Science Center","active":true,"usgs":true}],"preferred":true,"id":407697,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"MacConnell, Elizabeth","contributorId":7861,"corporation":false,"usgs":true,"family":"MacConnell","given":"Elizabeth","email":"","affiliations":[],"preferred":false,"id":407694,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hogstrand, Christer","contributorId":22926,"corporation":false,"usgs":true,"family":"Hogstrand","given":"Christer","email":"","affiliations":[],"preferred":false,"id":407695,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70026005,"text":"70026005 - 2003 - Abundance and characteristics of the recreational water quality indicator bacteria Escherichia coli and enterococci in gull faeces","interactions":[],"lastModifiedDate":"2018-11-19T07:40:35","indexId":"70026005","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2169,"text":"Journal of Applied Microbiology","active":true,"publicationSubtype":{"id":10}},"title":"Abundance and characteristics of the recreational water quality indicator bacteria Escherichia coli and enterococci in gull faeces","docAbstract":"<p><strong>Aims:</strong><span>&nbsp;</span>To evaluate the numbers and selected phenotypic and genotypic characteristics of the faecal indicator bacteria<span>&nbsp;</span><i>Escherichia coli</i><span>&nbsp;</span>and enterococci in gull faeces at representative Great Lakes swimming beaches in the United States.</p><p><strong>Methods and Results:</strong><span>&nbsp;</span><i>E. coli</i><span>&nbsp;</span>and enterococci were enumerated in gull faeces by membrane filtration.<span>&nbsp;</span><i>E. coli</i><span>&nbsp;</span>genotypes (rep‐PCR genomic profiles) and<span>&nbsp;</span><i>E. coli</i><span>&nbsp;</span>(Vitek<sup>®</sup><span>&nbsp;</span>GNI+) and enterococci (API<sup>®</sup><span>&nbsp;</span>rapid ID 32 Strep and resistance to streptomycin, gentamicin, vancomycin, tetracycline and ampicillin) phenotypes were determined for isolates obtained from gull faeces both early and late in the swimming season. Identical<span>&nbsp;</span><i>E. coli</i><span>&nbsp;</span>genotypes were obtained only from single gull faecal samples but most faecal samples yielded more than one genotype (median of eight genotypes for samples with 10 isolates).<span>&nbsp;</span><i>E. coli</i><span>&nbsp;</span>isolates from the same site that clustered at ≥85% similarity were from the same sampling date and shared phenotypic characteristics, and at this similarity level there was population overlap between the two geographically isolated beach sites.<span>&nbsp;</span><i>Enterococcus</i><span>&nbsp;</span>API<sup>®</sup><span>&nbsp;</span>profiles varied with sampling date. Gull enterococci displayed wide variation in antibiotic resistance patterns, and high‐level resistance to some antibiotics.</p><p><strong>Conclusions:</strong><span>&nbsp;</span>Gull faeces could be a major contributor of<span>&nbsp;</span><i>E. coli</i><span>&nbsp;</span>(10<sup>5</sup>–10<sup>9</sup> CFU g<sup>−1</sup>) and enterococci (10<sup>4</sup>–10<sup>8</sup> CFU g<sup>−1</sup>) to Great Lakes recreational waters.<span>&nbsp;</span><i>E. coli</i><span>&nbsp;</span>and enterococci in gull faeces are highly variable with respect to their genotypic and phenotypic characteristics and may exhibit temporal or geographic trends in these features.</p><p><strong>Significance and Impact of the Study:</strong><span>&nbsp;</span>The high degree of variation in genotypic or phenotypic characteristics of<span>&nbsp;</span><i>E. coli</i><span>&nbsp;</span>or enterococci populations within gull hosts will require extensive sampling for adequate characterization, and will influence methods that use these characteristics to determine faecal contamination sources for recreational waters.</p>","language":"English","publisher":"Wiley","doi":"10.1046/j.1365-2672.2003.01910.x","issn":"13645072","usgsCitation":"Fogarty, L., Haack, S., Wolcott, M.J., and Whitman, R., 2003, Abundance and characteristics of the recreational water quality indicator bacteria Escherichia coli and enterococci in gull faeces: Journal of Applied Microbiology, v. 94, no. 5, p. 865-878, https://doi.org/10.1046/j.1365-2672.2003.01910.x.","productDescription":"14 p.","startPage":"865","endPage":"878","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":208695,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1046/j.1365-2672.2003.01910.x"},{"id":234617,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"94","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e659e4b0c8380cd4735f","contributors":{"authors":[{"text":"Fogarty, L.R.","contributorId":27236,"corporation":false,"usgs":true,"family":"Fogarty","given":"L.R.","email":"","affiliations":[],"preferred":false,"id":407467,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haack, S.K.","contributorId":26457,"corporation":false,"usgs":true,"family":"Haack","given":"S.K.","email":"","affiliations":[],"preferred":false,"id":407466,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wolcott, M. J. 0000-0002-3924-5940","orcid":"https://orcid.org/0000-0002-3924-5940","contributorId":44110,"corporation":false,"usgs":true,"family":"Wolcott","given":"M.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":407468,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Whitman, R.L.","contributorId":69750,"corporation":false,"usgs":true,"family":"Whitman","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":407469,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70026004,"text":"70026004 - 2003 - Modelling hydrologic responses in a small forested catchment (Panola Mountain, Georgia, USA): A comparison of the original and a new dynamic TOPMODEL","interactions":[],"lastModifiedDate":"2012-03-12T17:20:24","indexId":"70026004","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"Modelling hydrologic responses in a small forested catchment (Panola Mountain, Georgia, USA): A comparison of the original and a new dynamic TOPMODEL","docAbstract":"Preliminary modelling results for a new version of the rainfall-runoff model TOPMODEL, dynamic TOPMODEL, are compared with those of the original TOPMODEL formulation for predicting streamflow at the Panola Mountain Research Watershed, Georgia. Dynamic TOPMODEL uses a kinematic wave routing of subsurface flow, which allows for dynamically variable upslope contributing areas, while retaining the concept of hydrological similarity to increase computational efficiency. Model performance in predicting discharge was assessed for the original TOPMODEL and for one landscape unit (LU) and three LU versions of the dynamic TOPMODEL (a bare rock area, hillslope with regolith <1 m, and a riparian zone with regolith ???5 m). All simulations used a 30 min time step for each of three water years. Each 1-LU model underpredicted the peak streamflow, and generally overpredicted recession streamflow during wet periods and underpredicted during dry periods. The difference between predicted recession streamflow generally was less for the dynamic TOPMODEL and smallest for the 3-LU model. Bayesian combination of results for different water years within the GLUE methodology left no behavioural original or 1-LU dynamic models and only 168 (of 96 000 sample parameter sets) for the 3-LU model. The efficiency for the streamflow prediction of the best 3-LU model was 0.83 for an individual year, but the results suggest that further improvements could be made. ?? 2003 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.1128","issn":"08856087","usgsCitation":"Peters, N., Freer, J., and Beven, K., 2003, Modelling hydrologic responses in a small forested catchment (Panola Mountain, Georgia, USA): A comparison of the original and a new dynamic TOPMODEL: Hydrological Processes, v. 17, no. 2, p. 345-362, https://doi.org/10.1002/hyp.1128.","startPage":"345","endPage":"362","numberOfPages":"18","costCenters":[],"links":[{"id":208694,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.1128"},{"id":234616,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationDate":"2003-01-23","publicationStatus":"PW","scienceBaseUri":"505a5c6be4b0c8380cd6fca2","contributors":{"authors":[{"text":"Peters, N.E.","contributorId":33332,"corporation":false,"usgs":true,"family":"Peters","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":407464,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Freer, J.","contributorId":61975,"corporation":false,"usgs":true,"family":"Freer","given":"J.","email":"","affiliations":[],"preferred":false,"id":407465,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Beven, K.","contributorId":25320,"corporation":false,"usgs":true,"family":"Beven","given":"K.","email":"","affiliations":[],"preferred":false,"id":407463,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025964,"text":"70025964 - 2003 - Characterization and diagenesis of strong-acid carboxyl groups in humic substances","interactions":[],"lastModifiedDate":"2020-01-04T13:19:09","indexId":"70025964","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Characterization and diagenesis of strong-acid carboxyl groups in humic substances","docAbstract":"A small fraction of carboxylic acid functional groups in humic substances are exceptionally acidic with pKa values as low as 0.5. A review of acid-group theory eliminated most models and explanations for these exceptionally acidic carboxyl groups. These acidic carboxyl groups in Suwannee River fulvic acid were enriched by a 2-stage fractionation process and the fractions were characterized by elemental, molecular-weight, and titrimetric analyses, and by infrared and 13C- and 1H-nuclear magnetic resonance spectrometry. An average structural model of the most acidic fraction derived from the characterization data indicated a high density of carboxyl groups clustered on oxygen-heterocycle alicyclic rings. Intramolecular H-bonding between adjacent carboxyl groups in these ring structures enhanced stabilization of the carboxylate anion which results in low pKa1 values. The standard, tetrahydrofuran tetracarboxylic acid, was shown to have similar acidity characteristics to the highly acidic fulvic acid fraction. The end products of 3 known diagenetic pathways for the formation of humic substances were shown to result in carboxyl groups clustered on oxygen-heterocycle alicyclic rings.","language":"English","publisher":"Elsevier","doi":"10.1016/S0883-2927(02)00100-2","issn":"08832927","usgsCitation":"Leenheer, J., Wershaw, R., Brown, G., and Reddy, M., 2003, Characterization and diagenesis of strong-acid carboxyl groups in humic substances: Applied Geochemistry, v. 18, no. 3, p. 471-482, https://doi.org/10.1016/S0883-2927(02)00100-2.","productDescription":"12 p.","startPage":"471","endPage":"482","numberOfPages":"12","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234546,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"18","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f4ace4b0c8380cd4be54","contributors":{"authors":[{"text":"Leenheer, J.A.","contributorId":75123,"corporation":false,"usgs":true,"family":"Leenheer","given":"J.A.","affiliations":[],"preferred":false,"id":407293,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wershaw, R.L.","contributorId":62223,"corporation":false,"usgs":true,"family":"Wershaw","given":"R.L.","affiliations":[],"preferred":false,"id":407291,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brown, G.K.","contributorId":62362,"corporation":false,"usgs":true,"family":"Brown","given":"G.K.","email":"","affiliations":[],"preferred":false,"id":407292,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Reddy, M.M.","contributorId":24363,"corporation":false,"usgs":true,"family":"Reddy","given":"M.M.","email":"","affiliations":[],"preferred":false,"id":407290,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70025934,"text":"70025934 - 2003 - Mobilization of radionuclides from uranium mill tailings and related waste materials in anaerobic environments","interactions":[],"lastModifiedDate":"2018-11-16T09:27:34","indexId":"70025934","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2439,"text":"Journal of Radioanalytical and Nuclear Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Mobilization of radionuclides from uranium mill tailings and related waste materials in anaerobic environments","docAbstract":"Specific extraction studies in our laboratory have shown that iron and manganese oxide- and alkaline earth sulfate minerals are important hosts of radium in uranium mill tailings. Iron- and sulfate-reducing bacteria may enhance the release of radium (and its analog barium) from uranium mill tailings, oil field pipe scale [a major technologically enhanced naturally occurring radioactive material (TENORM) waste], and jarosite (a common mineral in sulfuric acid processed-tailings). These research findings are reviewed and discussed in the context of nuclear waste forms (such as barium sulfate matrices), radioactive waste management practices, and geochemical environments in the Earth's surficial and shallow subsurface regions.","language":"English","publisher":"Springer","doi":"10.1023/A:1022501003604","issn":"02365731","usgsCitation":"Landa, E.R., 2003, Mobilization of radionuclides from uranium mill tailings and related waste materials in anaerobic environments: Journal of Radioanalytical and Nuclear Chemistry, v. 255, no. 3, p. 559-563, https://doi.org/10.1023/A:1022501003604.","productDescription":"5 p.","startPage":"559","endPage":"563","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234722,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208753,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1023/A:1022501003604"}],"volume":"255","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5b99e4b0c8380cd6f691","contributors":{"authors":[{"text":"Landa, E. R.","contributorId":100002,"corporation":false,"usgs":true,"family":"Landa","given":"E.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":407151,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70025896,"text":"70025896 - 2003 - Geology of the Ivanhoe Hg-Au district, northern Nevada: Influence of Miocene volcanism, lakes, and active faulting on epithermal mineralization","interactions":[],"lastModifiedDate":"2021-07-27T18:17:32.236705","indexId":"70025896","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Geology of the Ivanhoe Hg-Au district, northern Nevada: Influence of Miocene volcanism, lakes, and active faulting on epithermal mineralization","docAbstract":"<p><span>The mercury-gold deposits of the&nbsp;</span>Ivanhoe<span>&nbsp;mining&nbsp;</span>district<span>&nbsp;in&nbsp;</span>northern<span>&nbsp;</span>Nevada<span>&nbsp;formed when middle&nbsp;</span>Miocene<span>&nbsp;rhyolitic&nbsp;</span>volcanism<span>&nbsp;and high-angle&nbsp;</span>faulting<span>&nbsp;disrupted a shallow lacustrine environment. Sinter and replacement mercury deposits formed at and near the paleosurface, and disseminated gold deposits and high-grade gold-silver veins formed beneath the hot spring deposits. The lacustrine environment provided abundant meteoric water; the rhyolites heated the water; and the faults, flow units, and lakebeds provided fluid pathways for the hydrothermal fluids. A shallow&nbsp;</span>lake<span>&nbsp;began to develop in the&nbsp;</span>Ivanhoe<span>&nbsp;area about 16.5 Ma. The&nbsp;</span>lake<span>&nbsp;progressively expanded and covered the entire area with fine-grained lacustrine sediments. Lacustrine sedimentation continued to at least 14.4 Ma, and periodic fluctuations in the size and extent of the&nbsp;</span>lake<span>&nbsp;may have been responses to both climate and nearby&nbsp;</span>volcanism<span>. The eruption of rhyolite and andesite flows and domes periodically disrupted the lacustrine environment and produced interfingered flows and&nbsp;</span>lake<span>&nbsp;sediments. The major pulse of rhyolitic&nbsp;</span>volcanism<span>&nbsp;took place between 15.16 ± 0.05 and 14.92 ± 0.05 Ma. High-angle&nbsp;</span>faulting<span>&nbsp;began in the basement about 15.2 Ma, penetrated to and disrupted the paleosurface after 15.10 ± 0.06 Ma, and largely ceased by 14.92 ± 0.05 Ma. Ground motion related to both&nbsp;</span>faulting<span>&nbsp;and&nbsp;</span>volcanism<span>&nbsp;created debris flows and soft-sediment deformation in the lakebeds. Mercury-gold&nbsp;</span>mineralization<span>&nbsp;was coeval with rhyolite&nbsp;</span>volcanism<span>&nbsp;and high-angle&nbsp;</span>faulting<span>, and it took place about 15.2 to 14.9 Ma. At and near the paleosurface, hydrothermal fluids migrated through tuffaceous sediments above relatively impermeable volcanic and Paleozoic units, creating chalcedonic, cinnabar-bearing replacement bodies and sinters. Disseminated gold was deposited in sedimentary and volcanic rocks beneath the mercury deposits, although the hydrologic path between the two ore types is unclear. Higher-grade gold-silver deposits formed in massive rhyolites and Paleozoic quartzites at deeper levels, and these mineralized zones possibly represent the feeder zones for the higher-level deposits. Fluctuations in the ground-water table locally produced hydrothermal oxidation of the near-surface mercury and disseminated gold deposits. The locus of&nbsp;</span>mineralization<span>&nbsp;shifted with time, moving south and east from its inception point in the west-central part of the&nbsp;</span>district<span>. Thus, although&nbsp;</span>mineralization<span>&nbsp;in the&nbsp;</span>district<span>&nbsp;took place during a span of 300,000 years, the duration of&nbsp;</span>mineralization<span>&nbsp;at any one place probably was much shorter. The low-sulfidation deposits of the&nbsp;</span>Ivanhoe<span>&nbsp;</span>district<span>&nbsp;formed at the same time and under similar conditions as those in the nearby Midas&nbsp;</span>district<span>, 15 km to the northwest, which includes the large, high-grade Ken Snyder gold-silver&nbsp;</span>epithermal<span>&nbsp;vein deposit. The exposures in the&nbsp;</span>Ivanhoe<span>&nbsp;</span>district<span>&nbsp;are interpreted to represent the near-surface example of the paleosurface that originally was present above the Midas mineralizing system. The resulting combined&nbsp;</span>Ivanhoe<span>-Midas model provides an exploration guide for&nbsp;</span>epithermal<span>&nbsp;deposits in similar geologic environments in&nbsp;</span>northern<span>&nbsp;</span>Nevada<span>.</span></p>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.98.2.409","issn":"03610128","usgsCitation":"Wallace, A.R., 2003, Geology of the Ivanhoe Hg-Au district, northern Nevada: Influence of Miocene volcanism, lakes, and active faulting on epithermal mineralization: Economic Geology, v. 98, no. 2, p. 409-424, https://doi.org/10.2113/gsecongeo.98.2.409.","productDescription":"16 p.","startPage":"409","endPage":"424","costCenters":[],"links":[{"id":387485,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"98","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a25cae4b0c8380cd58b8d","contributors":{"authors":[{"text":"Wallace, A. R.","contributorId":59445,"corporation":false,"usgs":true,"family":"Wallace","given":"A.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":406989,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70025850,"text":"70025850 - 2003 - Geomorphic and hydrologic assessment of erosion hazards at the Norman municipal landfill, Canadian River floodplain, central Oklahoma","interactions":[],"lastModifiedDate":"2018-11-16T10:21:33","indexId":"70025850","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1574,"text":"Environmental & Engineering Geoscience","printIssn":"1078-7275","active":true,"publicationSubtype":{"id":10}},"title":"Geomorphic and hydrologic assessment of erosion hazards at the Norman municipal landfill, Canadian River floodplain, central Oklahoma","docAbstract":"<p><span>The Norman, Oklahoma, municipal landfill closed in 1985 after 63 years of operation, because it was identified as a point source of hazardous leachate composed of organic and inorganic compounds. The landfill is located on the floodplain of the Canadian River, a sand-bed river characterized by erodible channel boundaries and by large variation in mean monthly discharges. In 1986, floodwaters eroded riprap protection at the southern end of the landfill and penetrated the landfill's clay cap, thereby exposing the landfill contents. The impact of this moderate-magnitude flood event (Q</span><sub>12</sub><span>) was the catalyst to investigate erosion hazards at the Norman landfill. This geomorphic investigation analyzed floodplain geomorphology and historical channel changes, flood-frequency distributions, an erosion threshold, the geomorphic effectiveness of discharge events, and other factors that influence erosion hazards at the landfill site. The erosion hazard at the Norman landfill is a function of the location of the landfill with respect to the channel thalweg, erosional resistance of the channel margins, magnitude and duration of discrete discharge events, channel form and hydraulic geometry, and cumulative effects related to a series of discharge events. Based on current climatic conditions and historical channel changes, a minimum erosion threshold is set at bankfull discharge (Q = 572 m</span><sup>3</sup><span>/s). The annual probability of exceeding this threshold is 0.53. In addition, this analysis indicates that peak stream power is less informative than total energy expenditures when estimating the erosion potential or geomorphic effectiveness of discrete discharge events. On the Canadian River, long-duration, moderate-magnitude floods can have larger total energy expenditures than shorter-duration, high-magnitude floods and therefore represent the most serious erosion hazard to floodplain structures.</span></p>","language":"English","publisher":"Geological Society of America","doi":"10.2113/9.3.241","issn":"10787275","usgsCitation":"Curtis, J.A., and Whitney, J.W., 2003, Geomorphic and hydrologic assessment of erosion hazards at the Norman municipal landfill, Canadian River floodplain, central Oklahoma: Environmental & Engineering Geoscience, v. 9, no. 3, p. 241-252, https://doi.org/10.2113/9.3.241.","productDescription":"12 p.","startPage":"241","endPage":"252","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234503,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208632,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/9.3.241"}],"volume":"9","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a277de4b0c8380cd5992f","contributors":{"authors":[{"text":"Curtis, Jennifer A. 0000-0001-7766-994X jacurtis@usgs.gov","orcid":"https://orcid.org/0000-0001-7766-994X","contributorId":927,"corporation":false,"usgs":true,"family":"Curtis","given":"Jennifer","email":"jacurtis@usgs.gov","middleInitial":"A.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":406816,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whitney, John W. 0000-0003-3824-3692 jwhitney@usgs.gov","orcid":"https://orcid.org/0000-0003-3824-3692","contributorId":804,"corporation":false,"usgs":true,"family":"Whitney","given":"John","email":"jwhitney@usgs.gov","middleInitial":"W.","affiliations":[{"id":318,"text":"Geosciences and Environmental Change Science Center","active":true,"usgs":true}],"preferred":true,"id":406815,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70025847,"text":"70025847 - 2003 - The sedimentary record of climatic and anthropogenic influence on the Patuxent estuary and Chesapeake Bay ecosystems","interactions":[],"lastModifiedDate":"2012-03-12T17:20:32","indexId":"70025847","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1583,"text":"Estuaries","active":true,"publicationSubtype":{"id":10}},"title":"The sedimentary record of climatic and anthropogenic influence on the Patuxent estuary and Chesapeake Bay ecosystems","docAbstract":"Ecological and paleoecological studies from the Patuxent River mouth reveal dynamic variations in benthic ostracode assemblages over the past 600 years due to climatic and anthropogenic factors. Prior to the late 20th century, centennial-scale changes in species dominance were influenced by climatic and hydrological factors that primarily affected salinity and at times led to oxygen depletion. Decadal-scale droughts also occurred resulting in higher salinities and migration of ostracode species from the deep channel (Loxoconcha sp., Cytheromorpha newportensis) into shallower water along the flanks of the bay. During the 19th century the abundance of Leptocythere nikraveshae and Perissocytheridea brachyforma suggest increased turbidity and decreased salinity. Unprecedented changes in benthic ostracodes at the Patuxent mouth and in the deep channel of the bay occurred after the 1960s when Cytheromorpha curta became the dominant species, reflecting seasonal anoxia. The change in benthic assemblages coincided with the appearance of deformities in foraminifers. A combination of increased nitrate loading due to greater fertilizer use and increased freshwater flow explains this shift. A review of the geochemical and paleoecological evidence for dissolved oxygen indicates that seasonal oxygen depletion in the main channel of Chesapeake Bay varies over centennial and decadal timescales. Prior to 1700 AD, a relatively wet climate and high freshwater runoff led to oxygen depletion but rarely anoxia. Between 1700 and 1900, progressive eutrophication occurred related to land dearance and increased sedimentation, but this was superimposed on the oscillatory pattern of oxygen depletion most likely driven by climatological and hydrological factors. It also seems probable that the four- to five-fold increase in sedimentation due to agricultural and timber activity could have contributed to an increased natural nutrient load, likely fueling the early periods (1700-1900) of hypoxla prior to widespread fertilizer use. Twentieth-century anoxia worsened in the late 1930s-1940s and again around 1970, reaching unprecedented levels in the past few decades. Decadal and interannual variability in oxygen depletion even in the 20th century is still strongly influenced by climatic processes influencing precipitation and freshwater runoff.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuaries","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"01608347","usgsCitation":"Cronin, T.M., and Vann, C., 2003, The sedimentary record of climatic and anthropogenic influence on the Patuxent estuary and Chesapeake Bay ecosystems: Estuaries, v. 26, no. 2 A, p. 196-209.","startPage":"196","endPage":"209","numberOfPages":"14","costCenters":[],"links":[{"id":235011,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"2 A","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb005e4b08c986b324b8c","contributors":{"authors":[{"text":"Cronin, T. M. 0000-0002-2643-0979","orcid":"https://orcid.org/0000-0002-2643-0979","contributorId":42613,"corporation":false,"usgs":true,"family":"Cronin","given":"T.","email":"","middleInitial":"M.","affiliations":[{"id":40020,"text":"Florence Bascom Geoscience Center","active":true,"usgs":true}],"preferred":false,"id":406807,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Vann, C.D.","contributorId":51951,"corporation":false,"usgs":true,"family":"Vann","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":406808,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70025724,"text":"70025724 - 2003 - Simplified method for detecting tritium contamination in plants and soil","interactions":[],"lastModifiedDate":"2021-05-27T14:49:16.637512","indexId":"70025724","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2262,"text":"Journal of Environmental Quality","active":true,"publicationSubtype":{"id":10}},"title":"Simplified method for detecting tritium contamination in plants and soil","docAbstract":"<p><span>Cost-effective methods are needed to identify the presence and distribution of tritium near radioactive waste disposal and other contaminated sites. The objectives of this study were to (i) develop a simplified sample preparation method for determining tritium contamination in plants and (ii) determine if plant data could be used as an indicator of soil contamination. The method entailed collection and solar distillation of plant water from foliage, followed by filtration and adsorption of scintillation-interfering constituents on a graphite-based solid phase extraction (SPE) column. The method was evaluated using samples of creosote bush [</span><i>Larrea tridentata</i><span><span>&nbsp;</span>(Sessé &amp; Moc. ex DC.) Coville], an evergreen shrub, near a radioactive disposal area in the Mojave Desert. Laboratory tests showed that a 2-g SPE column was necessary and sufficient for accurate determination of known tritium concentrations in plant water. Comparisons of tritium concentrations in plant water determined with the solar distillation–SPE method and the standard (and more laborious) toluene-extraction method showed no significant difference between methods. Tritium concentrations in plant water and in water vapor of root-zone soil also showed no significant difference between methods. Thus, the solar distillation–SPE method provides a simple and cost-effective way to identify plant and soil contamination. The method is of sufficient accuracy to facilitate collection of plume-scale data and optimize placement of more sophisticated (and costly) monitoring equipment at contaminated sites. Although work to date has focused on one desert plant, the approach may be transferable to other species and environments after site-specific experiments.</span></p>","language":"English","publisher":"American Society of Agronomy","doi":"10.2134/jeq2003.9880","usgsCitation":"Andraski, B.J., Sandstrom, M.W., Michel, R.L., Radyk, J., Stonestrom, D.A., Johnson, M.J., and Mayers, C., 2003, Simplified method for detecting tritium contamination in plants and soil: Journal of Environmental Quality, v. 32, no. 3, p. 988-995, https://doi.org/10.2134/jeq2003.9880.","productDescription":"8 p.","startPage":"988","endPage":"995","costCenters":[{"id":452,"text":"National Water Quality Laboratory","active":true,"usgs":true},{"id":465,"text":"Nevada Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234899,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8f73e4b08c986b318f2f","contributors":{"authors":[{"text":"Andraski, Brian J. 0000-0002-2086-0417 andraski@usgs.gov","orcid":"https://orcid.org/0000-0002-2086-0417","contributorId":168800,"corporation":false,"usgs":true,"family":"Andraski","given":"Brian","email":"andraski@usgs.gov","middleInitial":"J.","affiliations":[{"id":38175,"text":"Toxics Substances Hydrology Program","active":true,"usgs":true},{"id":465,"text":"Nevada Water Science Center","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":false,"id":406320,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sandstrom, Mark W. 0000-0003-0006-5675 sandstro@usgs.gov","orcid":"https://orcid.org/0000-0003-0006-5675","contributorId":706,"corporation":false,"usgs":true,"family":"Sandstrom","given":"Mark","email":"sandstro@usgs.gov","middleInitial":"W.","affiliations":[{"id":503,"text":"Office of Water Quality","active":true,"usgs":true},{"id":37464,"text":"WMA - Laboratory & Analytical Services Division","active":true,"usgs":true},{"id":5046,"text":"Branch of Analytical Serv (NWQL)","active":true,"usgs":true},{"id":452,"text":"National Water Quality Laboratory","active":true,"usgs":true}],"preferred":true,"id":406317,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Michel, R. L.","contributorId":86375,"corporation":false,"usgs":true,"family":"Michel","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":406321,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Radyk, J.C.","contributorId":31176,"corporation":false,"usgs":true,"family":"Radyk","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":406318,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Stonestrom, David A. 0000-0001-7883-3385 dastones@usgs.gov","orcid":"https://orcid.org/0000-0001-7883-3385","contributorId":2280,"corporation":false,"usgs":true,"family":"Stonestrom","given":"David","email":"dastones@usgs.gov","middleInitial":"A.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":406322,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Johnson, M. J.","contributorId":52988,"corporation":false,"usgs":true,"family":"Johnson","given":"M.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":406319,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Mayers, C.J.","contributorId":17410,"corporation":false,"usgs":true,"family":"Mayers","given":"C.J.","email":"","affiliations":[],"preferred":false,"id":406316,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70025723,"text":"70025723 - 2003 - Inorganic nitrogen transformations in the bed of the Shingobee River, Minnesota: Integrating hydrologic and biological processes using sediment perfusion cores","interactions":[],"lastModifiedDate":"2018-11-19T09:50:37","indexId":"70025723","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2620,"text":"Limnology and Oceanography","active":true,"publicationSubtype":{"id":10}},"title":"Inorganic nitrogen transformations in the bed of the Shingobee River, Minnesota: Integrating hydrologic and biological processes using sediment perfusion cores","docAbstract":"Inorganic N transformations were examined in streambed sediments from the Shingobee River using sediment perfusion cores. The experimental design simulated groundwater-stream water mixing within sediment cores, which provided a well-defined one-dimensional representation of in situ hydrologic conditions. Two distinct hydrologic and chemical settings were preserved in the sediment cores: the lowermost sediments, perfused with groundwater, remained anaerobic during the incubations, whereas the uppermost sediments, perfused with oxic water pumped from the overlying water column, simulated stream water penetration into the bed. The maintenance of oxic and anoxic zones formed a biologically active aerobic-anaerobic interface. Ammonium (NH4+) dissolved in groundwater was transported conservatively through the lower core zone but was removed as it mixed with aerated recycle water. Concurrently, a small quantity of nitrate (NO3-) equaling ???25% of the NH4+ loss was produced in the upper sediments. The NH4+ and NO3- profiles in the uppermost sediments resulted from coupled nitrification-denitrification, because assimilation and sorption were negligible. We hypothesize that anaerobic microsites within the aerated upper sediments supported denitrification. Rates of nitrification and denitrification in the perfusion cores ranged 42-209 and 53-160 mg N m-2 day-1, respectively. The use of modified perfusion cores permitted the identification and quantification of N transformations and verified process control by surface water exchange into the shallow hyporheic zone of the Shingobee River.","language":"English","publisher":"ALSO","doi":"10.4319/lo.2003.48.3.1129","issn":"00243590","usgsCitation":"Sheibley, R., Duff, J., Jackman, A.P., and Triska, F., 2003, Inorganic nitrogen transformations in the bed of the Shingobee River, Minnesota: Integrating hydrologic and biological processes using sediment perfusion cores: Limnology and Oceanography, v. 48, no. 3, p. 1129-1140, https://doi.org/10.4319/lo.2003.48.3.1129.","productDescription":"12 p.","startPage":"1129","endPage":"1140","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234898,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Minnesota","otherGeospatial":"Shingobee River","volume":"48","issue":"3","noUsgsAuthors":false,"publicationDate":"2003-05-15","publicationStatus":"PW","scienceBaseUri":"505a3c0ee4b0c8380cd62a36","contributors":{"authors":[{"text":"Sheibley, R.W. 0000-0003-1627-8536 sheibley@usgs.gov","orcid":"https://orcid.org/0000-0003-1627-8536","contributorId":43066,"corporation":false,"usgs":true,"family":"Sheibley","given":"R.W.","email":"sheibley@usgs.gov","affiliations":[],"preferred":false,"id":406312,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Duff, J.H.","contributorId":60377,"corporation":false,"usgs":true,"family":"Duff","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":406314,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jackman, A. P.","contributorId":46957,"corporation":false,"usgs":true,"family":"Jackman","given":"A.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":406313,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Triska, F.J.","contributorId":69560,"corporation":false,"usgs":true,"family":"Triska","given":"F.J.","email":"","affiliations":[],"preferred":false,"id":406315,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70025720,"text":"70025720 - 2003 - Bioreactors for removing methyl bromide following contained fumigations","interactions":[],"lastModifiedDate":"2020-01-05T14:40:39","indexId":"70025720","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Bioreactors for removing methyl bromide following contained fumigations","docAbstract":"<div class=\"article_abstract\"><div class=\"container container_scaled-down\"><div class=\"row\"><div class=\"col-xs-12\"><div id=\"abstractBox\" class=\"article_abstract-content hlFld-Abstract\"><div class=\"article_abstract\"><div class=\"container container_scaled-down\"><div class=\"row\"><div class=\"col-xs-12\"><div id=\"abstractBox\" class=\"article_abstract-content hlFld-Abstract\"><p class=\"articleBody_abstractText\">Use of methyl bromide (MeBr) as a quarantine, commodity, or structural fumigant is under scrutiny because its release to the atmosphere contributes to the depletion of stratospheric ozone. A closed-system bioreactor consisting of 0.5 L of a growing culture of a previously described bacterium, strain IMB-1, removed MeBr (&gt;110 μmol L<sup>-1</sup>) from recirculating air. Strain IMB-1 grew slowly to high cell densities in the bioreactor using MeBr as its sole carbon and energy source. Bacterial oxidation of MeBr produced CO<sub>2</sub><span>&nbsp;</span>and hydrobromic acid (HBr), which required continuous neutralization with NaOH for the system to operate effectively. Strain IMB-1 was capable of sustained oxidation of large amounts of MeBr (170 mmol in 46 d). In an open-system bioreactor (10-L fermenter), strain IMB-1 oxidized a continuous supply of MeBr (220 μmol L<sup>-1</sup><span>&nbsp;</span>in air). Growth was continuous, and 0.5 mol of MeBr was removed from the air supply in 14 d. The specific rate of MeBr oxidation was 7 × 10<sup>-16</sup><span>&nbsp;</span>mol cell<sup>-1</sup><span>&nbsp;</span>h<sup>-1</sup>. Bioreactors such as these can therefore be used to remove large quantities of contaminant MeBr, which opens the possibility of biodegradation as a practical means for its disposal.</p></div></div></div></div></div></div></div></div></div></div><div class=\"article_content\"><div class=\"container container_scaled-down\"><div class=\"row\"><div class=\"col-xs-12\"><div class=\"article_content-table\"><div class=\"article_content-row\"><div class=\"article_content-left hlFld-FullText ui-resizable\"><div id=\"\" class=\"NLM_sec NLM_sec_level_1\"><div class=\"article_content-header\"><div class=\"article_content-header-row\"><div class=\"article_content-title\"><br data-mce-bogus=\"1\"></div></div></div></div></div></div></div></div></div></div></div>","language":"English","publisher":"ACS","doi":"10.1021/es026155j","issn":"0013936X","usgsCitation":"Miller, L., Baesman, S., and Oremland, R.S., 2003, Bioreactors for removing methyl bromide following contained fumigations: Environmental Science & Technology, v. 37, no. 8, p. 1698-1704, https://doi.org/10.1021/es026155j.","productDescription":"7 p.","startPage":"1698","endPage":"1704","numberOfPages":"7","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234818,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"8","noUsgsAuthors":false,"publicationDate":"2003-03-14","publicationStatus":"PW","scienceBaseUri":"5059f193e4b0c8380cd4acfd","contributors":{"authors":[{"text":"Miller, Laurence G. 0000-0002-7807-3475 lgmiller@usgs.gov","orcid":"https://orcid.org/0000-0002-7807-3475","contributorId":2460,"corporation":false,"usgs":true,"family":"Miller","given":"Laurence G.","email":"lgmiller@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":778874,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baesman, Shaun 0000-0003-0741-8269 sbaesman@usgs.gov","orcid":"https://orcid.org/0000-0003-0741-8269","contributorId":3478,"corporation":false,"usgs":true,"family":"Baesman","given":"Shaun","email":"sbaesman@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":37464,"text":"WMA - Laboratory & Analytical Services Division","active":true,"usgs":true}],"preferred":true,"id":778875,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Oremland, Ronald S. 0000-0001-7382-0147 roremlan@usgs.gov","orcid":"https://orcid.org/0000-0001-7382-0147","contributorId":931,"corporation":false,"usgs":true,"family":"Oremland","given":"Ronald","email":"roremlan@usgs.gov","middleInitial":"S.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":778876,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025719,"text":"70025719 - 2003 - Comparison of approaches for simulating reactive solute transport involving organic degradation reactions by multiple terminal electron acceptors","interactions":[],"lastModifiedDate":"2018-11-16T10:04:33","indexId":"70025719","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1315,"text":"Computers & Geosciences","printIssn":"0098-3004","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of approaches for simulating reactive solute transport involving organic degradation reactions by multiple terminal electron acceptors","docAbstract":"<p>Reactive solute transport models are useful tools for analyzing complex geochemical behavior resulting from biodegradation of organic compounds by multiple terminal electron acceptors (TEAPs). The usual approach of simulating the reactions of multiple TEAPs by an irreversible Monod rate law was compared with simulations that assumed a partial local equilibrium or kinetically controlled reactions subject to the requirement that the Gibbs free energy of reaction (Δ G) was either less than zero or less than a threshold value. Simulations were performed using a single organic substrate and O<sub>2</sub>, FeOOH, SO<sub>4</sub><sup>-2</sup> and CO<sub>2</sub> as the terminal electron acceptors. It was assumed that the organic substrate was slowly and completely fermented to CO<sub>2</sub> and H<sub>2</sub> and the H<sub>2</sub> was oxidized by the TEAPs. Simulations using the Monod approach showed that this irreversible rate law forced the reduction of both FeOOH and CO<sub>2</sub> to proceed even when Δ G was positive. This resulted in an over prediction in amount of FeOOH reduced to Fe(II) in parts of the domain and it resulted in large errors in pH. Simulations using mass action kinetics agreed with equilibrium simulations for the case of large rate constants. The extent of reductive dissolution of FeOOH was strongly dependent on the thermodynamic stability of the FeOOH phase. Transport simulations performed assuming that the reactions of the TEAPs stopped when Δ G exceeded a threshold value showed that only simulated H<sub>2</sub> concentrations were affected if the threshold value was the same for each TEAP. Simulated H2 concentrations were controlled by the fastest reaction of the TEAP, but it was common for reactions to occur concomitantly rather than sequentially.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/S0098-3004(03)00008-6","issn":"00983004","usgsCitation":"Curtis, G.P., 2003, Comparison of approaches for simulating reactive solute transport involving organic degradation reactions by multiple terminal electron acceptors: Computers & Geosciences, v. 29, no. 3, p. 319-329, https://doi.org/10.1016/S0098-3004(03)00008-6.","productDescription":"11 p.","startPage":"319","endPage":"329","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234817,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":208808,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0098-3004(03)00008-6"}],"volume":"29","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f84fe4b0c8380cd4cff6","contributors":{"authors":[{"text":"Curtis, Gary P. 0000-0003-3975-8882 gpcurtis@usgs.gov","orcid":"https://orcid.org/0000-0003-3975-8882","contributorId":2346,"corporation":false,"usgs":true,"family":"Curtis","given":"Gary","email":"gpcurtis@usgs.gov","middleInitial":"P.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":406296,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70025674,"text":"70025674 - 2003 - Estimation of past seepage volumes from calcite distribution in the Topopah Spring Tuff, Yucca Mountain, Nevada","interactions":[],"lastModifiedDate":"2012-03-12T17:20:22","indexId":"70025674","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2233,"text":"Journal of Contaminant Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Estimation of past seepage volumes from calcite distribution in the Topopah Spring Tuff, Yucca Mountain, Nevada","docAbstract":"Low-temperature calcite and opal record the past seepage of water into open fractures and lithophysal cavities in the unsaturated zone at Yucca Mountain, Nevada, site of a proposed high-level radioactive waste repository. Systematic measurements of calcite and opal coatings in the Exploratory Studies Facility (ESF) tunnel at the proposed repository horizon are used to estimate the volume of calcite at each site of calcite and/or opal deposition. By estimating the volume of water required to precipitate the measured volumes of calcite in the unsaturated zone, seepage rates of 0.005 to 5 liters/year (l/year) are calculated at the median and 95th percentile of the measured volumes, respectively. These seepage rates are at the low end of the range of seepage rates from recent performance assessment (PA) calculations, confirming the conservative nature of the performance assessment. However, the distribution of the calcite and opal coatings indicate that a much larger fraction of the potential waste packages would be contacted by this seepage than is calculated in the performance assessment.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Contaminant Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0169-7722(02)00167-5","issn":"01697722","usgsCitation":"Marshall, B., Neymark, L., and Peterman, Z.E., 2003, Estimation of past seepage volumes from calcite distribution in the Topopah Spring Tuff, Yucca Mountain, Nevada: Journal of Contaminant Hydrology, v. 62-63, p. 237-247, https://doi.org/10.1016/S0169-7722(02)00167-5.","startPage":"237","endPage":"247","numberOfPages":"11","costCenters":[],"links":[{"id":208739,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0169-7722(02)00167-5"},{"id":234705,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"62-63","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b9de4b0c8380cd527d4","contributors":{"authors":[{"text":"Marshall, B.D.","contributorId":19581,"corporation":false,"usgs":true,"family":"Marshall","given":"B.D.","email":"","affiliations":[],"preferred":false,"id":406121,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Neymark, L.A. 0000-0003-4190-0278","orcid":"https://orcid.org/0000-0003-4190-0278","contributorId":56673,"corporation":false,"usgs":true,"family":"Neymark","given":"L.A.","affiliations":[],"preferred":false,"id":406122,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Peterman, Z. E.","contributorId":63781,"corporation":false,"usgs":true,"family":"Peterman","given":"Z.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":406123,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025671,"text":"70025671 - 2003 - Chlorine-36 data at Yucca Mountain: Statistical tests of conceptual models for unsaturated-zone flow","interactions":[],"lastModifiedDate":"2012-03-12T17:20:22","indexId":"70025671","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2233,"text":"Journal of Contaminant Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Chlorine-36 data at Yucca Mountain: Statistical tests of conceptual models for unsaturated-zone flow","docAbstract":"An extensive set of chlorine-36 (36Cl) data has been collected in the Exploratory Studies Facility (ESF), an 8-km-long tunnel at Yucca Mountain, Nevada, for the purpose of developing and testing conceptual models of flow and transport in the unsaturated zone (UZ) at this site. At several locations, the measured values of 36Cl/Cl ratios for salts leached from rock samples are high enough to provide strong evidence that at least a small component of bomb-pulse 36Cl, fallout from atmospheric testing of nuclear devices in the 1950s and 1960s, was measured, implying that some fraction of the water traveled from the ground surface through 200-300 m of unsaturated rock to the level of the ESF during the last 50 years. These data are analyzed here using a formal statistical approach based on log-linear models to evaluate alternative conceptual models for the distribution of such fast flow paths. The most significant determinant of the presence of bomb-pulse 36Cl in a sample from the welded Topopah Spring unit (TSw) is the structural setting from which the sample was collected. Our analysis generally supports the conceptual model that a fault that cuts through the nonwelded Paintbrush tuff unit (PTn) that overlies the TSw is required in order for bomb-pulse 36Cl to be transmitted to the sample depth in less than 50 years. Away from PTn-cutting faults, the ages of water samples at the ESF appear to be a strong function of the thickness of the nonwelded tuff between the ground surface and the ESF, due to slow matrix flow in that unit. ?? 2002 Elsevier Science B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Contaminant Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0169-7722(02)00176-6","issn":"01697722","usgsCitation":"Campbell, K., Wolfsberg, A., Fabryka-Martin, J., and Sweetkind, D., 2003, Chlorine-36 data at Yucca Mountain: Statistical tests of conceptual models for unsaturated-zone flow: Journal of Contaminant Hydrology, v. 62-63, p. 43-61, https://doi.org/10.1016/S0169-7722(02)00176-6.","startPage":"43","endPage":"61","numberOfPages":"19","costCenters":[],"links":[{"id":208716,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0169-7722(02)00176-6"},{"id":234669,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"62-63","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f5cde4b0c8380cd4c423","contributors":{"authors":[{"text":"Campbell, K.","contributorId":10526,"corporation":false,"usgs":true,"family":"Campbell","given":"K.","affiliations":[],"preferred":false,"id":406111,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wolfsberg, A.","contributorId":106291,"corporation":false,"usgs":true,"family":"Wolfsberg","given":"A.","affiliations":[],"preferred":false,"id":406114,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fabryka-Martin, J.","contributorId":51467,"corporation":false,"usgs":true,"family":"Fabryka-Martin","given":"J.","affiliations":[],"preferred":false,"id":406112,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sweetkind, D.","contributorId":83645,"corporation":false,"usgs":true,"family":"Sweetkind","given":"D.","affiliations":[],"preferred":false,"id":406113,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70025666,"text":"70025666 - 2003 - Application of geographic information systems and remote sensing for quantifying patterns of erosion and water quality","interactions":[],"lastModifiedDate":"2012-03-12T17:20:22","indexId":"70025666","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"Application of geographic information systems and remote sensing for quantifying patterns of erosion and water quality","docAbstract":"[No abstract available]","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.1167","issn":"08856087","usgsCitation":"Ritchie, J., Walling, D., and Peters, J., 2003, Application of geographic information systems and remote sensing for quantifying patterns of erosion and water quality: Hydrological Processes, v. 17, no. 5, p. 885-886, https://doi.org/10.1002/hyp.1167.","startPage":"885","endPage":"886","numberOfPages":"2","costCenters":[],"links":[{"id":208646,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.1167"},{"id":234529,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"5","noUsgsAuthors":false,"publicationDate":"2003-03-14","publicationStatus":"PW","scienceBaseUri":"5059ec9ee4b0c8380cd493af","contributors":{"authors":[{"text":"Ritchie, J.C.","contributorId":89299,"corporation":false,"usgs":true,"family":"Ritchie","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":406091,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Walling, D.E.","contributorId":24481,"corporation":false,"usgs":true,"family":"Walling","given":"D.E.","email":"","affiliations":[],"preferred":false,"id":406089,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Peters, J.","contributorId":58066,"corporation":false,"usgs":true,"family":"Peters","given":"J.","affiliations":[],"preferred":false,"id":406090,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025642,"text":"70025642 - 2003 - The role of microbial reductive dechlorination of TCE at a phytoremediation site","interactions":[],"lastModifiedDate":"2020-01-05T14:44:38","indexId":"70025642","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2064,"text":"International Journal of Phytoremediation","active":true,"publicationSubtype":{"id":10}},"title":"The role of microbial reductive dechlorination of TCE at a phytoremediation site","docAbstract":"<div class=\"hlFld-Abstract test\"><div class=\"abstractSection abstractInFull\"><p>In April 1996, a phytoremediation field demonstration site at the Naval Air Station, Fort Worth, Texas, was developed to remediate shallow oxic ground water (&lt;3.7 m deep) contaminated with chlorinated ethenes. Microbial populations were sampled in February and June 1998. The populations under the newly planted cottonwood trees had not yet matured to an anaerobic community that could dechlorinate trichloroethene (TCE) to<span>&nbsp;</span><i>cis</i>-1,2-dichloroethene (DCE); however, the microbial population under a mature (∼22-year-old) cottonwood tree about 30 m southwest of the plantings had a mature anaerobic population capable of dechlorinating TCE to DCE, and DCE to vinyl chloride (VC). Oxygen-free sediment incubations with contaminated groundwater also demonstrated that resident microorganisms were capable of the dechlorination of TCE to DCE. This suggests that a sufficient amount of organic material is present for microbial dechlorination in aquifer microniches where dissolved O<sub>2</sub><span>&nbsp;</span>concentrations are low. Phenol, benzoic acid, acetic acid, and a cyclic hydrocarbon, compounds consistent with the degradation of root exudates and complex aromatic compounds, were identified by gas chromatography/mass spectrometry (GC/MS) in sediment samples under the mature cottonwood tree. Elsewhere at the site, transpiration and degradation by the cottonwood trees appears to be responsible for loss of chlorinated ethenes.</p></div></div>","language":"English","publisher":"Taylor and Francis","doi":"10.1080/16226510390856484","issn":"15226514","usgsCitation":"Godsy, E., Warren, E., and Paganelli, V., 2003, The role of microbial reductive dechlorination of TCE at a phytoremediation site: International Journal of Phytoremediation, v. 5, no. 1, p. 73-87, https://doi.org/10.1080/16226510390856484.","productDescription":"15 p.","startPage":"73","endPage":"87","numberOfPages":"15","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":234738,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Texas","city":"Fort Worth","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -97.591552734375,\n              32.58616357743131\n            ],\n            [\n              -97.042236328125,\n              32.58616357743131\n            ],\n            [\n              -97.042236328125,\n              32.895732015669815\n            ],\n            [\n              -97.591552734375,\n              32.895732015669815\n            ],\n            [\n              -97.591552734375,\n              32.58616357743131\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"5","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baf83e4b08c986b324857","contributors":{"authors":[{"text":"Godsy, E.M.","contributorId":56685,"corporation":false,"usgs":true,"family":"Godsy","given":"E.M.","email":"","affiliations":[],"preferred":false,"id":405989,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Warren, E.","contributorId":15360,"corporation":false,"usgs":true,"family":"Warren","given":"E.","email":"","affiliations":[],"preferred":false,"id":405988,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Paganelli, V.V.","contributorId":68080,"corporation":false,"usgs":true,"family":"Paganelli","given":"V.V.","email":"","affiliations":[],"preferred":false,"id":405990,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025601,"text":"70025601 - 2003 - Molecular-scale characterization of uranium sorption by bone apatite materials for a permeable reactive barrier demonstration","interactions":[],"lastModifiedDate":"2018-11-16T08:10:13","indexId":"70025601","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Molecular-scale characterization of uranium sorption by bone apatite materials for a permeable reactive barrier demonstration","docAbstract":"<div class=\"hlFld-Abstract\"><div id=\"abstractBox\"><p class=\"articleBody_abstractText\">Uranium binding to bone charcoal and bone meal apatite materials was investigated using U L<sub>III</sub>-edge EXAFS spectroscopy and synchrotron source XRD measurements of laboratory batch preparations in the absence and presence of dissolved carbonate. Pelletized bone char apatite recovered from a permeable reactive barrier (PRB) at Fry Canyon, UT, was also studied. EXAFS analyses indicate that U(VI) sorption in the absence of dissolved carbonate occurred by surface complexation of U(VI) for sorbed concentrations ≤ 5500 μg U(VI)/g for all materials with the exception of crushed bone char pellets. Either a split or a disordered equatorial oxygen shell was observed, consistent with complexation of uranyl by the apatite surface. A second shell of atoms at a distance of 2.9 Å was required to fit the spectra of samples prepared in the presence of dissolved carbonate (4.8 mM total) and is interpreted as formation of ternary carbonate complexes with sorbed U(VI). A U−P distance at 3.5−3.6 Å was found for most samples under conditions where uranyl phosphate phases did not form, which is consistent with monodentate coordination of uranyl by phosphate groups in the apatite surface. At sorbed concentrations ≥ 5500 μg U(VI)/g in the absence of dissolved carbonate, formation of the uranyl phosphate solid phase, chernikovite, was observed. The presence of dissolved carbonate (4.8 mM total) suppressed the formation of chernikovite, which was not detected even with sorbed U(VI) up to 12 300 μg U(VI)/g in batch samples of bone meal, bone charcoal, and reagent-grade hydroxyapatite. EXAFS spectra of bone char samples recovered from the Fry Canyon PRB were comparable to laboratory samples in the presence of dissolved carbonate where U(VI) sorption occurred by surface complexation. Our findings demonstrate that uranium uptake by bone apatite will probably occur by surface complexation instead of precipitation of uranyl phosphate phases under the groundwater conditions found at many U-contaminated sites.</p></div></div>","language":"English","publisher":"ACS","doi":"10.1021/es0343959","issn":"0013936X","usgsCitation":"Fuller, C.C., Bargar, J., and Davis, J., 2003, Molecular-scale characterization of uranium sorption by bone apatite materials for a permeable reactive barrier demonstration: Environmental Science & Technology, v. 37, no. 20, p. 4642-4649, https://doi.org/10.1021/es0343959.","productDescription":"8 p.","startPage":"4642","endPage":"4649","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":209415,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es0343959"},{"id":235832,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"20","noUsgsAuthors":false,"publicationDate":"2003-09-11","publicationStatus":"PW","scienceBaseUri":"505a5d18e4b0c8380cd7015f","contributors":{"authors":[{"text":"Fuller, C. C.","contributorId":29858,"corporation":false,"usgs":true,"family":"Fuller","given":"C.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":405817,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bargar, J.R.","contributorId":82466,"corporation":false,"usgs":true,"family":"Bargar","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":405819,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Davis, J.A.","contributorId":71694,"corporation":false,"usgs":true,"family":"Davis","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":405818,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70025598,"text":"70025598 - 2003 - Estimation of hectare-scale soil-moisture characteristics from aquifer-test data","interactions":[],"lastModifiedDate":"2018-11-16T07:37:44","indexId":"70025598","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Estimation of hectare-scale soil-moisture characteristics from aquifer-test data","docAbstract":"<div id=\"abstracts\" class=\"Abstracts\"><div id=\"aep-abstract-id9\" class=\"abstract author\"><div id=\"aep-abstract-sec-id10\"><p><span>Analysis of a 72-h, constant-rate&nbsp;aquifer&nbsp;test conducted in a coarse-grained and highly permeable, glacial outwash deposit on Cape Cod, Massachusetts revealed that drawdowns measured in 20&nbsp;piezometers&nbsp;located at various depths below the&nbsp;water table&nbsp;and distances from the pumped well were significantly influenced by effects of drainage from the&nbsp;</span>vadose zone<span>. The influence was greatest in piezometers located close to the water table and diminished with increasing depth. The influence of the vadose zone was evident from a gap, in the intermediate-time zone, between measured drawdowns and drawdowns computed under the assumption that drainage from the vadose zone occurred instantaneously in response to a decline in the elevation of the water table. By means of an analytical model that was designed to account for time-varying drainage, simulated drawdowns could be closely fitted to measured drawdowns regardless of the piezometer locations. Because of the exceptional quality and quantity of the data and the relatively small aquifer heterogeneity, it was possible by inverse modeling to estimate all relevant aquifer parameters and a set of three empirical constants used in the upper-boundary condition to account for the dynamic drainage process. The empirical constants were used to define a one-dimensional (1D) drainage versus time curve that is assumed to be representative of the bulk material overlying the water table. The curve was inverted with a&nbsp;parameter estimation&nbsp;algorithm and a 1D numerical model for variably saturated flow to obtain soil-moisture retention curves and unsaturated&nbsp;hydraulic conductivity&nbsp;relationships defined by the Brooks and Corey equations. Direct analysis of the aquifer-test data using a parameter estimation algorithm and a two-dimensional, axisymmetric numerical model for variably saturated flow yielded similar soil-moisture characteristics. Results suggest that hectare-scale soil-moisture characteristics are different from core-scale predictions and even relatively small amounts of fine-grained material and heterogeneity can dominate the large-scale soil-moisture characteristics and aquifer response.</span></p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/S0022-1694(03)00202-6","issn":"00221694","usgsCitation":"Moench, A., 2003, Estimation of hectare-scale soil-moisture characteristics from aquifer-test data: Journal of Hydrology, v. 281, no. 1-2, p. 82-95, https://doi.org/10.1016/S0022-1694(03)00202-6.","productDescription":"14 p.","startPage":"82","endPage":"95","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":209398,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0022-1694(03)00202-6"},{"id":235796,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"281","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b90e4b0c8380cd5279b","contributors":{"authors":[{"text":"Moench, A.F.","contributorId":91495,"corporation":false,"usgs":true,"family":"Moench","given":"A.F.","email":"","affiliations":[],"preferred":false,"id":405802,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70025549,"text":"70025549 - 2003 - Simulation of unsteady flow and solute transport in a tidal river network","interactions":[],"lastModifiedDate":"2021-07-28T16:12:29.677132","indexId":"70025549","displayToPublicDate":"2003-01-01T00:00:00","publicationYear":"2003","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1515,"text":"Engineering Computations (Swansea, Wales)","active":true,"publicationSubtype":{"id":10}},"title":"Simulation of unsteady flow and solute transport in a tidal river network","docAbstract":"A mathematical model and numerical method for water flow and solute transport in a tidal river network is presented. The tidal river network is defined as a system of open channels of rivers with junctions and cross sections. As an example, the Pearl River in China is represented by a network of 104 channels, 62 nodes, and a total of 330 cross sections with 11 boundary section for one of the applications. The simulations are performed with a supercomputer for seven scenarios of water flow and/or solute transport in the Pearl River, China, with different hydrological and weather conditions. Comparisons with available data are shown. The intention of this study is to summarize previous works and to provide a useful tool for water environmental management in a tidal river network, particularly for the Pearl River, China.","language":"English","publisher":"MCB UP","doi":"10.1108/02644400310488853","issn":"02644401","usgsCitation":"Zhan, X., 2003, Simulation of unsteady flow and solute transport in a tidal river network: Engineering Computations (Swansea, Wales), v. 20, no. 5-6, p. 754-767, https://doi.org/10.1108/02644400310488853.","productDescription":"14 p.","startPage":"754","endPage":"767","costCenters":[],"links":[{"id":387508,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"5-6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b90b3e4b08c986b319638","contributors":{"authors":[{"text":"Zhan, X.","contributorId":26477,"corporation":false,"usgs":true,"family":"Zhan","given":"X.","email":"","affiliations":[],"preferred":false,"id":405607,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
]}