{"pageNumber":"250","pageRowStart":"6225","pageSize":"25","recordCount":16446,"records":[{"id":70029873,"text":"70029873 - 2007 - Effects of intraborehole flow on groundwater age distribution","interactions":[],"lastModifiedDate":"2018-10-11T19:02:24","indexId":"70029873","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1923,"text":"Hydrogeology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Effects of intraborehole flow on groundwater age distribution","docAbstract":"<p>Environmental tracers are used to estimate groundwater ages and travel times, but the strongly heterogeneous nature of many subsurface environments can cause mixing between waters of highly disparate ages, adding additional complexity to the age-estimation process. Mixing may be exacerbated by the presence of wells because long open intervals or long screens with openings at multiple depths can transport water and solutes rapidly over a large vertical distance. The effect of intraborehole flow on groundwater age was examined numerically using direct age transport simulation coupled with the Multi-Node Well Package of MODFLOW. Ages in a homogeneous, anisotropic aquifer reached a predevelopment steady state possessing strong depth dependence. A nonpumping multi-node well was then introduced in one of three locations within the system. In all three cases, vertical transport along the well resulted in substantial changes in age distributions within the system. After a pumping well was added near the nonpumping multi-node well, ages were further perturbed by a flow reversal in the nonpumping multi-node well. Results indicated that intraborehole flow can substantially alter groundwater ages, but the effects are highly dependent on local or regional flow conditions and may change with time.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrogeology Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10040-006-0139-8","issn":"14312174","usgsCitation":"Zinn, B., and Konikow, L.F., 2007, Effects of intraborehole flow on groundwater age distribution: Hydrogeology Journal, v. 15, no. 4, p. 633-643, https://doi.org/10.1007/s10040-006-0139-8.","productDescription":"11 p.","startPage":"633","endPage":"643","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240353,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212809,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10040-006-0139-8"}],"volume":"15","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-01-09","publicationStatus":"PW","scienceBaseUri":"505a0728e4b0c8380cd515ac","contributors":{"authors":[{"text":"Zinn, B.A.","contributorId":78153,"corporation":false,"usgs":true,"family":"Zinn","given":"B.A.","email":"","affiliations":[],"preferred":false,"id":424684,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Konikow, Leonard F. 0000-0002-0940-3856 lkonikow@usgs.gov","orcid":"https://orcid.org/0000-0002-0940-3856","contributorId":158,"corporation":false,"usgs":true,"family":"Konikow","given":"Leonard","email":"lkonikow@usgs.gov","middleInitial":"F.","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":424683,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029880,"text":"70029880 - 2007 - In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity","interactions":[],"lastModifiedDate":"2018-10-17T12:44:23","indexId":"70029880","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1619,"text":"FEMS Microbiology Ecology","onlineIssn":"1574-6941","printIssn":"0168-6496","active":true,"publicationSubtype":{"id":10}},"title":"In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity","docAbstract":"<p>There are few methods available for broadly assessing microbial community metabolism directly within a groundwater environment. In this study, hydrogen consumption rates were estimated from in situ injection/withdrawal tests conducted in two geochemically varying, contaminated aquifers as an approach towards developing such a method. The hydrogen consumption first-order rates varied from 0.002 nM h-1 for an uncontaminated, aerobic site to 2.5 nM h-1 for a contaminated site where sulfate reduction was a predominant process. The method could accommodate the over three orders of magnitude range in rates that existed between subsurface sites. In a denitrifying zone, the hydrogen consumption rate (0.02 nM h-1) was immediately abolished in the presence of air or an antibiotic mixture, suggesting that such measurements may also be sensitive to the effects of environmental perturbations on field microbial activities. Comparable laboratory determinations with sediment slurries exhibited hydrogen consumption kinetics that differed substantially from the field estimates. Because anaerobic degradation of organic matter relies on the rapid consumption of hydrogen and subsequent maintenance at low levels, such in situ measures of hydrogen turnover can serve as a key indicator of the functioning of microbial food webs and may be more reliable than laboratory determinations.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"FEMS Microbiology Ecology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1574-6941.2007.00286.x","issn":"01686496","usgsCitation":"Harris, S., Smith, R.L., and Suflita, J.M., 2007, In situ hydrogen consumption kinetics as an indicator of subsurface microbial activity: FEMS Microbiology Ecology, v. 60, no. 2, p. 220-228, https://doi.org/10.1111/j.1574-6941.2007.00286.x.","productDescription":"9 p.","startPage":"220","endPage":"228","numberOfPages":"9","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487621,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1574-6941.2007.00286.x","text":"Publisher Index Page"},{"id":212892,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1574-6941.2007.00286.x"},{"id":240456,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"60","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a39a4e4b0c8380cd619b7","contributors":{"authors":[{"text":"Harris, S.H.","contributorId":10950,"corporation":false,"usgs":true,"family":"Harris","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":424712,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smith, Richard L. 0000-0002-3829-0125 rlsmith@usgs.gov","orcid":"https://orcid.org/0000-0002-3829-0125","contributorId":1592,"corporation":false,"usgs":true,"family":"Smith","given":"Richard","email":"rlsmith@usgs.gov","middleInitial":"L.","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":38175,"text":"Toxics Substances Hydrology Program","active":true,"usgs":true}],"preferred":true,"id":424714,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Suflita, Joseph M.","contributorId":187604,"corporation":false,"usgs":false,"family":"Suflita","given":"Joseph","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":424713,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029882,"text":"70029882 - 2007 - Reproductive responses of male fathead minnows exposed to wastewater treatment plant effluent, effluent treated with XAD8 resin, and an environmentally relevant mixture of alkylphenol compounds","interactions":[],"lastModifiedDate":"2018-10-17T09:56:34","indexId":"70029882","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":874,"text":"Aquatic Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Reproductive responses of male fathead minnows exposed to wastewater treatment plant effluent, effluent treated with XAD8 resin, and an environmentally relevant mixture of alkylphenol compounds","docAbstract":"<p><span>On-site, continuous-flow experiments were conducted during August and October 2002 at a major metropolitan wastewater treatment plant (WWTP) to determine if effluent exposure induced endocrine disruption as manifested in the reproductive competence of sexually mature male fathead minnows (</span><i>Pimephales promelas</i><span>). The fathead minnows were exposed in parallel experiments to WWTP effluent and WWTP effluent treated with XAD8 macroreticular resin to remove the hydrophobic-neutral fraction which contained steroidal hormones, alkylphenolethoxylates (APEs), and other potential endocrine disrupting compounds (EDCs). The effluent composition varied on a temporal scale and the continuous-flow experiments captured the range of chemical variability that occurred during normal WWTP operations. Exposure to WWTP effluent resulted in vitellogenin induction in male fathead minnows, with greater response in October than in August. Concentrations of ammonia, APEs, 17β-estradiol, and other EDCs also were greater in October than in August, reflecting a change in effluent composition. In the October experiment, XAD8 treatment significantly reduced vitellogenin induction in the male fathead minnows relative to the untreated effluent, whereas in August, XAD8 treatment had little effect. During both experiments, XAD8 treatment removed greater than 90% of the APEs. Exposure of fish to a mixture of APEs similar in composition and concentration to the WWTP effluent, but prepared in groundwater and conducted at a separate facility, elicited vitellogenin induction during both experiments. There was a positive relation between vitellogenin induction and hepatosomatic index (HSI), but not gonadosomatic index (GSI), secondary sexual characteristics index (SSCI), or reproductive competency. In contrast to expectations, the GSI and SSCI increased in males exposed to WWTP effluent compared to groundwater controls. The GSI, SSCI, and reproductive competency were positively affected by XAD8 treatment of the WWTP effluent.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Aquatic Toxicology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.aquatox.2007.01.003","issn":"0166445X","usgsCitation":"Barber, L.B., Lee, K., Swackhamer, D.L., and Schoenfuss, H.L., 2007, Reproductive responses of male fathead minnows exposed to wastewater treatment plant effluent, effluent treated with XAD8 resin, and an environmentally relevant mixture of alkylphenol compounds: Aquatic Toxicology, v. 82, no. 1, p. 36-46, https://doi.org/10.1016/j.aquatox.2007.01.003.","productDescription":"11 p.","startPage":"36","endPage":"46","numberOfPages":"11","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240490,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212923,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.aquatox.2007.01.003"}],"volume":"82","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa8dde4b0c8380cd85ae0","contributors":{"authors":[{"text":"Barber, Larry B. 0000-0002-0561-0831 lbbarber@usgs.gov","orcid":"https://orcid.org/0000-0002-0561-0831","contributorId":921,"corporation":false,"usgs":true,"family":"Barber","given":"Larry","email":"lbbarber@usgs.gov","middleInitial":"B.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":424719,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lee, Kathy 0000-0002-7683-1367 klee@usgs.gov","orcid":"https://orcid.org/0000-0002-7683-1367","contributorId":2538,"corporation":false,"usgs":true,"family":"Lee","given":"Kathy","email":"klee@usgs.gov","affiliations":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"preferred":true,"id":424720,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Swackhamer, Deborah L.","contributorId":96544,"corporation":false,"usgs":true,"family":"Swackhamer","given":"Deborah","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":424718,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schoenfuss, Heiko L.","contributorId":76409,"corporation":false,"usgs":false,"family":"Schoenfuss","given":"Heiko","email":"","middleInitial":"L.","affiliations":[{"id":13317,"text":"Saint Cloud State University","active":true,"usgs":false}],"preferred":false,"id":424721,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029892,"text":"70029892 - 2007 - Free zinc ion and dissolved orthophosphate effects on phytoplankton from Coeur d'Alene Lake, Idaho","interactions":[],"lastModifiedDate":"2023-08-25T12:07:25.166789","indexId":"70029892","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Free zinc ion and dissolved orthophosphate effects on phytoplankton from Coeur d'Alene Lake, Idaho","docAbstract":"<p>Coeur d'Alene Lake in northern Idaho is fed by two major rivers:  the Coeur d'Alene River from the east and the St. Joe River from the south, with the Spokane River as its outlet to the north. This phosphorus-limited lake has been subjected to decades of mining (primarily for zinc and silver) and other anthropogenic inputs. A 32 full-factorial experimental design was used to examine the interactive effects of free (uncomplexed) zinc ion and dissolved-orthophosphate concentrations on phytoplankton that were isolated from two sites along a longitudinal zinc-concentration gradient in Coeur d'Alene Lake. The two sites displayed different dominant taxa. Chlorella minutissima, a dominant species near the southern St. Joe River inlet, exhibited greater sensitivity to free Zn ions than Asterionella formosa, collected nearer the Coeur d'Alene River mouth with elevated dissolved-zinc concentrations. Empirical phytoplankton-response models were generated to describe phytoplankton growth in response to remediation strategies in the surrounding watershed. If dissolved Zn can be reduced in the water column from &gt;500 nM (i.e., current concentrations near and down stream of the Coeur d'Alene River plume) to &lt;3 nM (i.e., concentrations near the southern St. Joe River inlet) such that the lake is truly phosphorus limited, management of phosphorus inputs by surrounding communities will ultimately determine the limnologic state of the lake.</p>","language":"English","publisher":"American Chemical Society","doi":"10.1021/es062923l","issn":"0013936X","usgsCitation":"Kuwabara, J.S., Topping, B.R., Woods, P.F., and Carter, J.L., 2007, Free zinc ion and dissolved orthophosphate effects on phytoplankton from Coeur d'Alene Lake, Idaho: Environmental Science & Technology, v. 41, no. 8, p. 2811-2817, https://doi.org/10.1021/es062923l.","productDescription":"7 p.","startPage":"2811","endPage":"2817","numberOfPages":"7","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240650,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Idaho","otherGeospatial":"Coeur d'Alene Lake","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -116.81625366210938,\n              47.68018294648414\n            ],\n            [\n              -116.707763671875,\n              47.66538735632654\n            ],\n            [\n              -116.64596557617188,\n              47.635783590864854\n            ],\n            [\n              -116.64321899414062,\n              47.61079236060622\n            ],\n            [\n              -116.7572021484375,\n              47.61264397257417\n            ],\n            [\n   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       -116.83135986328125,\n              47.61819841513311\n            ],\n            [\n              -116.80938720703124,\n              47.62190104905555\n            ],\n            [\n              -116.82861328125001,\n              47.65613798222679\n            ],\n            [\n              -116.83959960937499,\n              47.67186094318796\n            ],\n            [\n              -116.81625366210938,\n              47.68018294648414\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"41","issue":"8","noUsgsAuthors":false,"publicationDate":"2007-03-09","publicationStatus":"PW","scienceBaseUri":"505a13c1e4b0c8380cd54782","contributors":{"authors":[{"text":"Kuwabara, James S. 0000-0003-2502-1601 kuwabara@usgs.gov","orcid":"https://orcid.org/0000-0003-2502-1601","contributorId":3374,"corporation":false,"usgs":true,"family":"Kuwabara","given":"James","email":"kuwabara@usgs.gov","middleInitial":"S.","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":424758,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Topping, Brent R. 0000-0002-7887-4221 btopping@usgs.gov","orcid":"https://orcid.org/0000-0002-7887-4221","contributorId":1484,"corporation":false,"usgs":true,"family":"Topping","given":"Brent","email":"btopping@usgs.gov","middleInitial":"R.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":424760,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Woods, Paul F.","contributorId":82273,"corporation":false,"usgs":true,"family":"Woods","given":"Paul","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":424759,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Carter, James L. 0000-0002-0104-9776 jlcarter@usgs.gov","orcid":"https://orcid.org/0000-0002-0104-9776","contributorId":3278,"corporation":false,"usgs":true,"family":"Carter","given":"James","email":"jlcarter@usgs.gov","middleInitial":"L.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":424757,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70029926,"text":"70029926 - 2007 - Formation of tellurium nanocrystals during anaerobic growth of bacteria that use Te oxyanions as respiratory electron acceptors","interactions":[],"lastModifiedDate":"2023-08-25T12:21:45.373227","indexId":"70029926","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":850,"text":"Applied and Environmental Microbiology","active":true,"publicationSubtype":{"id":10}},"title":"Formation of tellurium nanocrystals during anaerobic growth of bacteria that use Te oxyanions as respiratory electron acceptors","docAbstract":"<div id=\"abstracts\" data-extent=\"frontmatter\"><div class=\"core-container\"><div>Certain toxic elements support the metabolism of diverse prokaryotes by serving as respiratory electron acceptors for growth. Here, we demonstrate that two anaerobes previously shown to be capable of respiring oxyanions of selenium also achieve growth by reduction of either tellurate [Te(VI)] or tellurite [Te(IV)] to elemental tellurium [Te(0)]. This reduction achieves a sizeable stable-Te-isotopic fractionation (isotopic enrichment factor [ε] = −0.4 to −1.0 per ml per atomic mass unit) and results in the formation of unique crystalline Te(0) nanoarchitectures as end products. The Te(0) crystals occur internally within but mainly externally from the cells, and each microorganism forms a distinctly different structure. Those formed by<span>&nbsp;</span><i>Bacillus selenitireducens</i><span>&nbsp;</span>initially are nanorods (∼10-nm diameter by 200-nm length), which cluster together, forming larger (∼1,000-nm) rosettes composed of numerous individual shards (∼100-nm width by 1,000-nm length). In contrast,<span>&nbsp;</span><i>Sulfurospirillum barnesii</i><span>&nbsp;</span>forms extremely small, irregularly shaped nanospheres (diameter &lt; 50 nm) that coalesce into larger composite aggregates. Energy-dispersive X-ray spectroscopy and selected area electron diffraction indicate that both biominerals are composed entirely of Te and are crystalline, while Raman spectroscopy confirms that they are in the elemental state. These Te biominerals have specific spectral signatures (UV-visible light, Raman) that also provide clues to their internal structures. The use of microorganisms to generate Te nanomaterials may be an alternative for bench-scale syntheses. Additionally, they may also generate products with unique properties unattainable by conventional physical/chemical methods.</div></div></div>","language":"English","publisher":"American Society for Microbiology","doi":"10.1128/AEM.02558-06","issn":"00992240","usgsCitation":"Baesman, S., Bullen, T.D., Dewald, J., Zhang, D., Curran, S., Islam, F., Beveridge, T., and Oremland, R.S., 2007, Formation of tellurium nanocrystals during anaerobic growth of bacteria that use Te oxyanions as respiratory electron acceptors: Applied and Environmental Microbiology, v. 73, no. 7, p. 2135-2143, https://doi.org/10.1128/AEM.02558-06.","productDescription":"9 p.","startPage":"2135","endPage":"2143","numberOfPages":"9","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477183,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://www.ncbi.nlm.nih.gov/pmc/articles/1855670","text":"External Repository"},{"id":240652,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"73","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1358e4b0c8380cd5461a","contributors":{"authors":[{"text":"Baesman, Shaun M.","contributorId":34407,"corporation":false,"usgs":true,"family":"Baesman","given":"Shaun M.","affiliations":[],"preferred":false,"id":424935,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bullen, Thomas D. 0000-0003-2281-1691 tdbullen@usgs.gov","orcid":"https://orcid.org/0000-0003-2281-1691","contributorId":1969,"corporation":false,"usgs":true,"family":"Bullen","given":"Thomas","email":"tdbullen@usgs.gov","middleInitial":"D.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":424933,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dewald, J.","contributorId":87761,"corporation":false,"usgs":true,"family":"Dewald","given":"J.","email":"","affiliations":[],"preferred":false,"id":424934,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Zhang, Donghui","contributorId":209814,"corporation":false,"usgs":false,"family":"Zhang","given":"Donghui","email":"","affiliations":[],"preferred":false,"id":424931,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Curran, S.","contributorId":22125,"corporation":false,"usgs":true,"family":"Curran","given":"S.","email":"","affiliations":[],"preferred":false,"id":424930,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Islam, F.S.","contributorId":101880,"corporation":false,"usgs":true,"family":"Islam","given":"F.S.","email":"","affiliations":[],"preferred":false,"id":424937,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Beveridge, T.J.","contributorId":35524,"corporation":false,"usgs":true,"family":"Beveridge","given":"T.J.","email":"","affiliations":[],"preferred":false,"id":424932,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"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":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true}],"preferred":true,"id":424936,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70029928,"text":"70029928 - 2007 - Anthropogenic contaminants as tracers in an urbanizing karst aquifer","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70029928","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Anthropogenic contaminants as tracers in an urbanizing karst aquifer","docAbstract":"Karst aquifers are uniquely vulnerable to contamination. In the Barton Springs segment of the karstic Edwards aquifer (Texas, U.S.A.), urban contaminants such as pesticides and volatile organic compounds frequently are detected in spring base flow. To determine whether contaminant concentrations change in response to storms, and if they therefore might act as tracers of focused recharge, samples were collected from Barton Springs at closely spaced intervals following three storms. Two herbicides (atrazine and simazine), two insecticides (carbaryl and diazinon), and a solvent (tetrachloroethene) described breakthrough curves over a 1-week period following one or more storms. The breakthrough curves were decomposed into two to five log-normal subcurves, which were interpreted as representing pulses of contaminants moving through the aquifer. Each subcurve could be used in the same way as an artificial tracer to determine travel time to and recovery at the spring. The contaminants have several advantages over artificial tracers: they represent the actual compounds of interest, they are injected essentially simultaneously at several points, and they are injected under those conditions when transport is of the most interest, i.e., following storms. The response of storm discharge, specific conductance, and contaminant loading at the spring depended on initial aquifer flow conditions, which varied from very low (spring discharge of 0.48??m3/s) to high (spring discharge of 2.7??m3/s): concentrations and recovery were the highest when initial aquifer flow conditions were low. This behavior provides information about aquifer structure and the influence of aquifer flow condition on transport properties. ?? 2006 Elsevier 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/j.jconhyd.2006.08.010","issn":"01697722","usgsCitation":"Mahler, B., and Massei, N., 2007, Anthropogenic contaminants as tracers in an urbanizing karst aquifer: Journal of Contaminant Hydrology, v. 91, no. 1-2, p. 81-106, https://doi.org/10.1016/j.jconhyd.2006.08.010.","startPage":"81","endPage":"106","numberOfPages":"26","costCenters":[],"links":[{"id":213095,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jconhyd.2006.08.010"},{"id":240684,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec58e4b0c8380cd491ed","contributors":{"authors":[{"text":"Mahler, B.","contributorId":32737,"corporation":false,"usgs":true,"family":"Mahler","given":"B.","email":"","affiliations":[],"preferred":false,"id":424941,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Massei, N.","contributorId":48347,"corporation":false,"usgs":true,"family":"Massei","given":"N.","email":"","affiliations":[],"preferred":false,"id":424942,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029938,"text":"70029938 - 2007 - Biotransformation of caffeine, cotinine, and nicotine in stream sediments: Implications for use as wastewater indicators","interactions":[],"lastModifiedDate":"2018-10-17T10:55:33","indexId":"70029938","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Biotransformation of caffeine, cotinine, and nicotine in stream sediments: Implications for use as wastewater indicators","docAbstract":"<p>Microbially catalyzed cleavage of the imadazole ring of caffeine was observed in stream sediments collected upstream and downstream of municipal wastewater treatment plants (WWTP) in three geographically separate stream systems. Microbial demethylation of the <i>N</i>-methyl component of cotinine and its metabolic precursor, nicotine, also was observed in these sediments. These findings indicate that stream sediment microorganisms are able to substantially alter the chemical structure and thus the analytical signatures of these candidate waste indicator compounds. The potential for in situ biotransformation must be considered if these compounds are employed as markers to identify the sources and track the fate of wastewater compounds in surface-water systems.</p>","language":"English","publisher":"Elsevier","doi":"10.1897/06-483R.1","issn":"07307268","usgsCitation":"Bradley, P.M., Barber, L.B., Kolpin, D.W., McMahon, P.B., and Chapelle, F.H., 2007, Biotransformation of caffeine, cotinine, and nicotine in stream sediments: Implications for use as wastewater indicators: Environmental Toxicology and Chemistry, v. 26, no. 6, p. 1116-1121, https://doi.org/10.1897/06-483R.1.","productDescription":"6 p.","startPage":"1116","endPage":"1121","numberOfPages":"6","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":351,"text":"Iowa Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology 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,{"id":70029941,"text":"70029941 - 2007 - Mars reconnaissance orbiter's high resolution imaging science experiment (HiRISE)","interactions":[],"lastModifiedDate":"2018-12-07T16:19:37","indexId":"70029941","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2317,"text":"Journal of Geophysical Research E: Planets","active":true,"publicationSubtype":{"id":10}},"title":"Mars reconnaissance orbiter's high resolution imaging science experiment (HiRISE)","docAbstract":"<p><span>The HiRISE camera features a 0.5 m diameter primary mirror, 12 m effective focal length, and a focal plane system that can acquire images containing up to 28 Gb (gigabits) of data in as little as 6 seconds. HiRISE will provide detailed images (0.25 to 1.3 m/pixel) covering ∼1% of the Martian surface during the 2‐year Primary Science Phase (PSP) beginning November 2006. Most images will include color data covering 20% of the potential field of view. A top priority is to acquire ∼1000 stereo pairs and apply precision geometric corrections to enable topographic measurements to better than 25 cm vertical precision. We expect to return more than 12 Tb of HiRISE data during the 2‐year PSP, and use pixel binning, conversion from 14 to 8 bit values, and a lossless compression system to increase coverage. HiRISE images are acquired via 14 CCD detectors, each with 2 output channels, and with multiple choices for pixel binning and number of Time Delay and Integration lines. HiRISE will support Mars exploration by locating and characterizing past, present, and future landing sites, unsuccessful landing sites, and past and potentially future rover traverses. We will investigate cratering, volcanism, tectonism, hydrology, sedimentary processes, stratigraphy, aeolian processes, mass wasting, landscape evolution, seasonal processes, climate change, spectrophotometry, glacial and periglacial processes, polar geology, and regolith properties. An Internet Web site (HiWeb) will enable anyone in the world to suggest HiRISE targets on Mars and to easily locate, view, and download HiRISE data products.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research E: Planets","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"American Geophysical Union","publisherLocation":"Washington, D.C.","doi":"10.1029/2005JE002605","issn":"01480227","usgsCitation":"McEwen, A.S., Eliason, E.M., Bergstrom, J.W., Bridges, N.T., Hansen, C.J., Delamere, W.A., Grant, J.A., Gulick, V.C., Herkenhoff, K.E., Keszthelyi, L., Kirk, R.L., Mellon, M.T., Squyres, S.W., Thomas, N., and Weitz, C.M., 2007, Mars reconnaissance orbiter's high resolution imaging science experiment (HiRISE): Journal of Geophysical Research E: Planets, v. 112, no. 5, 16 p., https://doi.org/10.1029/2005JE002605.","productDescription":"16 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":477064,"rank":1,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://boris.unibe.ch/25369/","text":"External Repository"},{"id":240358,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Mars","volume":"112","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-05-17","publicationStatus":"PW","scienceBaseUri":"505a5225e4b0c8380cd6c1b6","contributors":{"authors":[{"text":"McEwen, Alfred S.","contributorId":61657,"corporation":false,"usgs":false,"family":"McEwen","given":"Alfred","email":"","middleInitial":"S.","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":424993,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eliason, Eric M.","contributorId":21280,"corporation":false,"usgs":true,"family":"Eliason","given":"Eric","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":425005,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bergstrom, James W.","contributorId":210510,"corporation":false,"usgs":false,"family":"Bergstrom","given":"James","email":"","middleInitial":"W.","affiliations":[{"id":6944,"text":"Ball Aerospace Technologies Corporation","active":true,"usgs":false}],"preferred":false,"id":424997,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bridges, Nathan T.","contributorId":45005,"corporation":false,"usgs":true,"family":"Bridges","given":"Nathan","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":424994,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hansen, Candice J.","contributorId":70235,"corporation":false,"usgs":false,"family":"Hansen","given":"Candice","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":425003,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Delamere, W. Alan","contributorId":15042,"corporation":false,"usgs":true,"family":"Delamere","given":"W.","email":"","middleInitial":"Alan","affiliations":[],"preferred":false,"id":425000,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Grant, John A.","contributorId":35230,"corporation":false,"usgs":true,"family":"Grant","given":"John","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424995,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gulick, Virginia C.","contributorId":52443,"corporation":false,"usgs":true,"family":"Gulick","given":"Virginia","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":424999,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Herkenhoff, Kenneth E. 0000-0002-3153-6663 kherkenhoff@usgs.gov","orcid":"https://orcid.org/0000-0002-3153-6663","contributorId":2275,"corporation":false,"usgs":true,"family":"Herkenhoff","given":"Kenneth","email":"kherkenhoff@usgs.gov","middleInitial":"E.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":425001,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Keszthelyi, Laszlo P. 0000-0003-1879-4331 laz@usgs.gov","orcid":"https://orcid.org/0000-0003-1879-4331","contributorId":52802,"corporation":false,"usgs":true,"family":"Keszthelyi","given":"Laszlo P.","email":"laz@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":424998,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Kirk, Randolph L. 0000-0003-0842-9226 rkirk@usgs.gov","orcid":"https://orcid.org/0000-0003-0842-9226","contributorId":2765,"corporation":false,"usgs":true,"family":"Kirk","given":"Randolph","email":"rkirk@usgs.gov","middleInitial":"L.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":425006,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Mellon, Michael T.","contributorId":8603,"corporation":false,"usgs":false,"family":"Mellon","given":"Michael","email":"","middleInitial":"T.","affiliations":[{"id":7037,"text":"Southwest Research Institute, Boulder, Colorado","active":true,"usgs":false}],"preferred":false,"id":425004,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Squyres, Steven W.","contributorId":10537,"corporation":false,"usgs":true,"family":"Squyres","given":"Steven","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":424996,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Thomas, Nicolas","contributorId":203694,"corporation":false,"usgs":false,"family":"Thomas","given":"Nicolas","email":"","affiliations":[{"id":25430,"text":"University of Bern","active":true,"usgs":false}],"preferred":false,"id":425002,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Weitz, Catherine M.","contributorId":210511,"corporation":false,"usgs":false,"family":"Weitz","given":"Catherine","email":"","middleInitial":"M.","affiliations":[{"id":13179,"text":"Planetary Science Institute","active":true,"usgs":false}],"preferred":true,"id":424992,"contributorType":{"id":1,"text":"Authors"},"rank":15}]}}
,{"id":70029955,"text":"70029955 - 2007 - Late Quaternary paleoenvironments of an ephemeral wetland in North Dakota, USA: Relative interactions of ground-water hydrology and climate change","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70029955","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2411,"text":"Journal of Paleolimnology","active":true,"publicationSubtype":{"id":10}},"title":"Late Quaternary paleoenvironments of an ephemeral wetland in North Dakota, USA: Relative interactions of ground-water hydrology and climate change","docAbstract":"This study of fossils (pollen, plant macrofossils, stomata and fish) and sediments (lithostratigraphy and geochemistry) from the Wendel site in North Dakota, USA, emphasizes the importance of considering ground-water hydrology when deciphering paleoclimate signals from lakes in postglacial landscapes. The Wendel site was a paleolake from about 11,500 14C yr BP to 11,100 14C yr BP. Afterwards, the lake-level lowered until it became a prairie marsh by 9,300 14C yr BP and finally, at 8,500 14C yr BP, an ephemeral wetland as it is today. Meanwhile, the vegetation changed from a white spruce parkland (11,500 to 10,500 14C yr BP) to deciduous parkland, followed by grassland at 9,300 14C yr BP. The pattern and timing of these aquatic and terrestrial changes are similar to coeval kettle lake records from adjacent uplands, providing a regional aridity signal. However, two local sources of ground water were identified from the fossil and geochemical data, which mediated atmospheric inputs to the Wendel basin. First, the paleolake received water from the melting of stagnant ice buried under local till for about 900 years after glacier recession. Later, Holocene droughts probably caused the lower-elevation Wendel site to capture the ground water of up-gradient lakes. ?? 2007 Springer Science+Business Media, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Paleolimnology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10933-006-9079-5","issn":"09212728","usgsCitation":"Yansa, C., Dean, W., and Murphy, E., 2007, Late Quaternary paleoenvironments of an ephemeral wetland in North Dakota, USA: Relative interactions of ground-water hydrology and climate change: Journal of Paleolimnology, v. 38, no. 3, p. 441-457, https://doi.org/10.1007/s10933-006-9079-5.","startPage":"441","endPage":"457","numberOfPages":"17","costCenters":[],"links":[{"id":213043,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10933-006-9079-5"},{"id":240623,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"38","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-04-05","publicationStatus":"PW","scienceBaseUri":"505a4533e4b0c8380cd670fc","contributors":{"authors":[{"text":"Yansa, C.H.","contributorId":17406,"corporation":false,"usgs":true,"family":"Yansa","given":"C.H.","email":"","affiliations":[],"preferred":false,"id":425056,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dean, W.E.","contributorId":97099,"corporation":false,"usgs":true,"family":"Dean","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":425058,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Murphy, E.C.","contributorId":86745,"corporation":false,"usgs":true,"family":"Murphy","given":"E.C.","email":"","affiliations":[],"preferred":false,"id":425057,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029956,"text":"70029956 - 2007 - Restoring coastal wetlands that were ditched for mosquito control: a preliminary assessment of hydro-leveling as a restoration technique","interactions":[],"lastModifiedDate":"2014-09-16T15:37:40","indexId":"70029956","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2219,"text":"Journal of Coastal Conservation","active":true,"publicationSubtype":{"id":10}},"title":"Restoring coastal wetlands that were ditched for mosquito control: a preliminary assessment of hydro-leveling as a restoration technique","docAbstract":"The wetlands surrounding Tampa Bay, Florida were extensively ditched for mosquito control in the 1950s. Spoil from ditch construction was placed adjacent to the wetlands ditches creating mound-like features (spoil-mounds). These mounds represent a loss of 14% of the wetland area in Tampa Bay. Spoil mounds interfere with tidal flow and are locations for non-native plants to colonize (e.g., <i>Schinus terebinthifolius</i>). Removal of the spoil mounds to eliminate exotic plants, restore native vegetation, and re-establish natural hydrology is a restoration priority for environmental managers. Hydro-leveling, a new technique, was tested in a mangrove forest restoration project in 2004. Hydro-leveling uses a high pressure stream of water to wash sediment from the spoil mound into the adjacent wetland and ditch. To assess the effectiveness of this technique, we conducted vegetation surveys in areas that were hydro-leveled and in non-hydro-leveled areas 3 years post-project. Adult Schinus were reduced but not eliminated from hydro-leveled mounds. Schinus seedlings however were absent from hydro-leveled sites. Colonization by native species was sparse. Mangrove seedlings were essentially absent (≈2 m<sup>−2</sup>) from the centers of hydro-leveled mounds and were in low density on their edges (17 m<sup>−2</sup>) in comparison to surrounding mangrove forests (105 m<sup>−2</sup>). Hydro-leveling resulted in mortality of mangroves adjacent to the mounds being leveled. This was probably caused by burial of pneumatophores during the hydro-leveling process. For hydro-leveling to be a useful and successful restoration technique several requirements must be met. Spoil mounds must be lowered to the level of the surrounding wetlands. Spoil must be distributed further into the adjacent wetland to prevent burial of nearby native vegetation. Finally, native species may need to be planted on hydro-leveled areas to speed up the re-vegetation process.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Coastal Conservation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer","doi":"10.1007/s11852-007-0007-2","issn":"14000350","usgsCitation":"Smith, T.J., Tiling, G., and Leasure, P.S., 2007, Restoring coastal wetlands that were ditched for mosquito control: a preliminary assessment of hydro-leveling as a restoration technique: Journal of Coastal Conservation, v. 11, no. 1, p. 67-74, https://doi.org/10.1007/s11852-007-0007-2.","productDescription":"8 p.","startPage":"67","endPage":"74","numberOfPages":"8","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":213044,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11852-007-0007-2"},{"id":240624,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-09-18","publicationStatus":"PW","scienceBaseUri":"505aaadce4b0c8380cd86586","contributors":{"authors":[{"text":"Smith, Thomas J. III tom_j_smith@usgs.gov","contributorId":1615,"corporation":false,"usgs":true,"family":"Smith","given":"Thomas","suffix":"III","email":"tom_j_smith@usgs.gov","middleInitial":"J.","affiliations":[{"id":566,"text":"Southeast Ecological Science Center","active":true,"usgs":true}],"preferred":false,"id":425059,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tiling, Ginger","contributorId":82787,"corporation":false,"usgs":true,"family":"Tiling","given":"Ginger","email":"","affiliations":[],"preferred":false,"id":425061,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Leasure, Pamela S.","contributorId":50732,"corporation":false,"usgs":true,"family":"Leasure","given":"Pamela","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":425060,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70031401,"text":"70031401 - 2007 - Influence of in-stream diel concentration cycles of dissolved trace metals on acute toxicity to one-year-old cutthroat trout (Oncorhynchus clarki lewisi)","interactions":[],"lastModifiedDate":"2018-10-16T09:23:52","indexId":"70031401","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Influence of in-stream diel concentration cycles of dissolved trace metals on acute toxicity to one-year-old cutthroat trout (Oncorhynchus clarki lewisi)","docAbstract":"<p><span>Extrapolating results of laboratory bioassays to streams is difficult, because conditions such as temperature and dissolved metal concentrations can change substantially on diel time scales. Field bioassays conducted for 96 h in two mining‐affected streams compared the survival of hatchery‐raised, metal‐näive westslope cutthroat trout (</span><i>Oncorhynchus clarki lewisi</i><span>) exposed to dissolved (0.1‐μm filtration) metal concentrations that either exhibited the diel variation observed in streams or were controlled at a constant value. Cadmium and Zn concentrations in these streams increased each night by as much as 61 and 125%, respectively, and decreased a corresponding amount the next day, whereas Cu did not display a diel concentration cycle. In High Ore Creek (40 km south of Helena, MT, USA), survival (33%) after exposure to natural diel‐fluctuating Zn concentrations (range, 214–634 μg/L; mean, 428 μg/L) was significantly (</span><i>p</i><span>&nbsp;= 0.008) higher than survival (14%) after exposure to a controlled, constant Zn concentration (422 μg/L). Similarly, in Dry Fork Belt Creek (70 km southeast of Great Falls, MT, USA), survival (75%) after exposure to diel‐fluctuating Zn concentrations (range, 266–522 μg/L; mean, 399 μg/L) was significantly (</span><i>p</i><span>&nbsp;= 0.022) higher than survival (50%) in the constant‐concentration treatment (392 μg/L). Survival likely was greater in these diel treatments, both because the periods of lower metal concentrations provided some relief for the fish and because toxicity during periods of higher metal concentrations was lessened by the simultaneous occurrence each night of lower water temperatures, which reduce the rate of metal uptake. Based on the present study, current water‐quality criteria appear to be protective for streams with diel concentration cycles of Zn (and, perhaps, Cd) for the hydrologic conditions tested.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/07-265.1","issn":"07307268","usgsCitation":"Nimick, D.A., Harper, D.D., Farag, A., Cleasby, T., MacConnell, E., and Skaar, D., 2007, Influence of in-stream diel concentration cycles of dissolved trace metals on acute toxicity to one-year-old cutthroat trout (Oncorhynchus clarki lewisi): Environmental Toxicology and Chemistry, v. 26, no. 12, p. 2667-2678, https://doi.org/10.1897/07-265.1.","productDescription":"12 p.","startPage":"2667","endPage":"2678","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":239723,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212261,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/07-265.1"}],"volume":"26","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-12-01","publicationStatus":"PW","scienceBaseUri":"505a3b44e4b0c8380cd62399","contributors":{"authors":[{"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":431345,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harper, David D. 0000-0001-7061-8461 david_harper@usgs.gov","orcid":"https://orcid.org/0000-0001-7061-8461","contributorId":1140,"corporation":false,"usgs":true,"family":"Harper","given":"David","email":"david_harper@usgs.gov","middleInitial":"D.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":false,"id":431346,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Farag, Aida 0000-0003-4247-6763 aida_farag@usgs.gov","orcid":"https://orcid.org/0000-0003-4247-6763","contributorId":200690,"corporation":false,"usgs":true,"family":"Farag","given":"Aida","email":"aida_farag@usgs.gov","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":true,"id":431348,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cleasby, Tom 0000-0003-0694-1541 tcleasby@usgs.gov","orcid":"https://orcid.org/0000-0003-0694-1541","contributorId":1137,"corporation":false,"usgs":true,"family":"Cleasby","given":"Tom","email":"tcleasby@usgs.gov","affiliations":[{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true}],"preferred":false,"id":431347,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"MacConnell, Elizabeth","contributorId":7861,"corporation":false,"usgs":true,"family":"MacConnell","given":"Elizabeth","email":"","affiliations":[],"preferred":false,"id":431343,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Skaar, D.","contributorId":28047,"corporation":false,"usgs":true,"family":"Skaar","given":"D.","email":"","affiliations":[],"preferred":false,"id":431344,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70029966,"text":"70029966 - 2007 - Widespread natural perchlorate in unsaturated zones of the southwest United States","interactions":[],"lastModifiedDate":"2023-08-02T11:23:16.865044","indexId":"70029966","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Widespread natural perchlorate in unsaturated zones of the southwest United States","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\"><p class=\"articleBody_abstractText\">A substantial reservoir (up to 1 kg ha<sup>-1</sup>) of natural perchlorate is present in diverse unsaturated zones of the arid and semi-arid southwestern United States. The perchlorate co-occurs with meteoric chloride that has accumulated in these soils throughout the Holocene [0 to 10−15 ka (thousand years ago)] and possibly longer periods. Previously, natural perchlorate widely believed to be limited to the Atacama Desert, now appears widespread in steppe-to-desert ecoregions. The perchlorate reservoir becomes sufficiently large to affect groundwater when recharge from irrigation or climate change flushes accumulated salts from the unsaturated zone. This new source may help explain increasing reports of perchlorate in dry region agricultural products and should be considered when evaluating overall source contributions.</p></div></div></div></div></div>","language":"English","publisher":"ACS publications","doi":"10.1021/es062853i","usgsCitation":"Rao, B., Anderson, T.A., Orris, G.J., Rainwater, K.A., Rajagopalan, S., Sandvig, R.M., Scanlon, B., Stonestrom, D.A., Walvoord, M.A., and Jackson, W., 2007, Widespread natural perchlorate in unsaturated zones of the southwest United States: Environmental Science & Technology, v. 41, no. 13, p. 4522-4528, https://doi.org/10.1021/es062853i.","productDescription":"7 p.","startPage":"4522","endPage":"4528","costCenters":[{"id":465,"text":"Nevada Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240218,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -117.37637060997972,\n              38.32858773159356\n            ],\n            [\n              -117.37637060997972,\n              30.437852260794457\n            ],\n            [\n              -100.68431363371681,\n              30.437852260794457\n            ],\n            [\n              -100.68431363371681,\n              38.32858773159356\n            ],\n            [\n              -117.37637060997972,\n              38.32858773159356\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"41","issue":"13","noUsgsAuthors":false,"publicationDate":"2007-06-06","publicationStatus":"PW","scienceBaseUri":"505bd0b3e4b08c986b32efef","contributors":{"authors":[{"text":"Rao, Balaji","contributorId":29643,"corporation":false,"usgs":false,"family":"Rao","given":"Balaji","affiliations":[],"preferred":false,"id":425096,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, Todd A.","contributorId":191110,"corporation":false,"usgs":false,"family":"Anderson","given":"Todd","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":425098,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Orris, Greta J. 0000-0002-2340-9955 greta@usgs.gov","orcid":"https://orcid.org/0000-0002-2340-9955","contributorId":3472,"corporation":false,"usgs":true,"family":"Orris","given":"Greta","email":"greta@usgs.gov","middleInitial":"J.","affiliations":[{"id":662,"text":"Western Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":425100,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rainwater, Ken A.","contributorId":61188,"corporation":false,"usgs":false,"family":"Rainwater","given":"Ken","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":425097,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Rajagopalan, Srinath","contributorId":191269,"corporation":false,"usgs":false,"family":"Rajagopalan","given":"Srinath","email":"","affiliations":[],"preferred":false,"id":425099,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Sandvig, Renee M.","contributorId":103875,"corporation":false,"usgs":false,"family":"Sandvig","given":"Renee","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":425104,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Scanlon, Bridget R.","contributorId":74093,"corporation":false,"usgs":true,"family":"Scanlon","given":"Bridget R.","affiliations":[],"preferred":false,"id":425101,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"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":425102,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Walvoord, Michelle Ann 0000-0003-4269-8366 walvoord@usgs.gov","orcid":"https://orcid.org/0000-0003-4269-8366","contributorId":147211,"corporation":false,"usgs":true,"family":"Walvoord","given":"Michelle","email":"walvoord@usgs.gov","middleInitial":"Ann","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":425103,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Jackson, W Andrew","contributorId":191265,"corporation":false,"usgs":false,"family":"Jackson","given":"W Andrew","affiliations":[],"preferred":false,"id":425095,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70029967,"text":"70029967 - 2007 - Arsenic attenuation by oxidized aquifer sediments in Bangladesh","interactions":[],"lastModifiedDate":"2023-08-02T12:26:36.475241","indexId":"70029967","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3352,"text":"Science of the Total Environment","active":true,"publicationSubtype":{"id":10}},"title":"Arsenic attenuation by oxidized aquifer sediments in Bangladesh","docAbstract":"<p>Recognition of arsenic (As) contamination of shallow fluvio-deltaic aquifers in the Bengal Basin has resulted in increasing exploitation of groundwater from deeper aquifers that generally contain low concentrations of dissolved As. Pumping-induced infiltration of high-As groundwater could eventually cause As concentrations in these aquifers to increase. This study investigates the adsorption capacity for As of sediment from a low-As aquifer near Dhaka, Bangladesh. A shallow, chemically-reducing aquifer at this site extends to a depth of 50&nbsp;m and has maximum As concentrations in groundwater of 900&nbsp;μg/L. At depths greater than 50&nbsp;m, geochemical conditions are more oxidizing and groundwater has &lt;&nbsp;5&nbsp;μg/L As. There is no thick layer of clay at this site to inhibit vertical transport of groundwater.</p><p>Arsenite [As(III)] is the dominant oxidation state in contaminated groundwater; however, data from laboratory batch experiments show that As(III) is oxidized to arsenate [As(V)] by manganese (Mn) minerals that are present in the oxidized sediment. Thus, the long-term viability of the deeper aquifers as a source of water supply is likely to depend on As(V) adsorption. The adsorption capacity of these sediments is a function of the oxidation state of As and the concentration of other solutes that compete for adsorption sites. Arsenite that was not oxidized did adsorb, but to a much lesser extent than As(V). Phosphate (P) caused a substantial decrease in As(V) adsorption. Increasing pH and concentrations of silica (Si) had lesser effects on As(V) adsorption. The effect of bicarbonate (HCO<sub>3</sub>) on As(V) adsorption was negligible. Equilibrium constants for adsorption of As(V), As(III), P, Si, HCO<sub>3</sub>, and H were determined from the experimental data and a quantitative model developed. Oxidation of As(III) was modeled with a first-order rate constant. This model was used to successfully simulate As(V) adsorption in the presence of multiple competing solutes. Results from these experiments show that oxidized sediments have a substantial but limited capacity for removal of As from groundwater.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.scitotenv.2006.11.029","issn":"00489697","usgsCitation":"Stollenwerk, K.G., Breit, G.N., Welch, A.H., Yount, J., Whitney, J.W., Foster, A.L., Uddin, M., Majumder, R., and Ahmed, N., 2007, Arsenic attenuation by oxidized aquifer sediments in Bangladesh: Science of the Total Environment, v. 379, no. 2-3, p. 133-150, https://doi.org/10.1016/j.scitotenv.2006.11.029.","productDescription":"18 p.","startPage":"133","endPage":"150","numberOfPages":"18","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477071,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/j.scitotenv.2006.11.029","text":"Publisher Index Page"},{"id":240253,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Bangladesh","city":"Dhaka","otherGeospatial":"Bengal Basin","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[92.67272,22.04124],[92.65226,21.32405],[92.30323,21.47549],[92.36855,20.67088],[92.08289,21.1922],[92.02522,21.70157],[91.83489,22.18294],[91.41709,22.76502],[90.49601,22.80502],[90.58696,22.39279],[90.27297,21.83637],[89.84747,22.03915],[89.70205,21.85712],[89.41886,21.96618],[89.03196,22.05571],[88.87631,22.87915],[88.52977,23.63114],[88.69994,24.23371],[88.08442,24.50166],[88.30637,24.86608],[88.93155,25.23869],[88.20979,25.76807],[88.56305,26.44653],[89.35509,26.01441],[89.83248,25.96508],[89.92069,25.26975],[90.87221,25.1326],[91.7996,25.14743],[92.3762,24.97669],[91.91509,24.13041],[91.46773,24.07264],[91.15896,23.50353],[91.70648,22.98526],[91.86993,23.62435],[92.14603,23.6275],[92.67272,22.04124]]]},\"properties\":{\"name\":\"Bangladesh\"}}]}","volume":"379","issue":"2-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ed8be4b0c8380cd49882","contributors":{"authors":[{"text":"Stollenwerk, Kenneth G. kgstolle@usgs.gov","contributorId":578,"corporation":false,"usgs":true,"family":"Stollenwerk","given":"Kenneth","email":"kgstolle@usgs.gov","middleInitial":"G.","affiliations":[],"preferred":true,"id":425109,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Breit, George N. 0000-0003-2188-6798 gbreit@usgs.gov","orcid":"https://orcid.org/0000-0003-2188-6798","contributorId":1480,"corporation":false,"usgs":true,"family":"Breit","given":"George","email":"gbreit@usgs.gov","middleInitial":"N.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":425111,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Welch, Alan H.","contributorId":35399,"corporation":false,"usgs":true,"family":"Welch","given":"Alan","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":425105,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Yount, James C.","contributorId":39341,"corporation":false,"usgs":true,"family":"Yount","given":"James C.","affiliations":[],"preferred":false,"id":425108,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"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":425107,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Foster, Andrea L. 0000-0003-1362-0068 afoster@usgs.gov","orcid":"https://orcid.org/0000-0003-1362-0068","contributorId":1740,"corporation":false,"usgs":true,"family":"Foster","given":"Andrea","email":"afoster@usgs.gov","middleInitial":"L.","affiliations":[{"id":662,"text":"Western Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":425106,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Uddin, M.N.","contributorId":105979,"corporation":false,"usgs":true,"family":"Uddin","given":"M.N.","email":"","affiliations":[],"preferred":false,"id":425113,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Majumder, R.K.","contributorId":94929,"corporation":false,"usgs":true,"family":"Majumder","given":"R.K.","email":"","affiliations":[],"preferred":false,"id":425112,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Ahmed, N.","contributorId":71846,"corporation":false,"usgs":true,"family":"Ahmed","given":"N.","email":"","affiliations":[],"preferred":false,"id":425110,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}}
,{"id":70029982,"text":"70029982 - 2007 - Anaerobic biodegradation and hydrogeochemical controls on natural attenuation of trichloroethene in an inland forested wetland","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029982","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1042,"text":"Bioremediation Journal","active":true,"publicationSubtype":{"id":10}},"title":"Anaerobic biodegradation and hydrogeochemical controls on natural attenuation of trichloroethene in an inland forested wetland","docAbstract":"Anaerobic biodegradation was conducted in a forested wetland where a plume of trichloroethylene discharges from a sand aquifer through organic-rich wetland and stream-bottom sediments. The rapid response of the wetland hydrology to precipitation events altered groundwater flow and geochemistry during wet conditions in the spring compared to the drier conditions in the summer and fall. During dry conditions, partial reductive dechlorination of trichloroethylene to cis-1,2-dichloroethylene occurred in methanogenic wetland porewater. Influx of oxygenated recharge during wet conditions led to a change from methanogenic to iron-reducing conditions and a lack of 1,2-dichloroethylene production in the wet spring conditions. During these wet conditions, dilution was the primary attenuation mechanism evident for trichloroethylene in the wetland porewater. Trichloroethylene degradation was insignificant in anaerobic microcosms constructed with the shallow wetland sediment. Natural attenuation of chlorinated solvents by anaerobic biodegradation may not be efficient at all wetland sites, despite organic-rich characteristics of the sediment.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Bioremediation Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1080/10889860701429294","issn":"10889868","usgsCitation":"Lorah, M., Dyer, L., and Burris, D., 2007, Anaerobic biodegradation and hydrogeochemical controls on natural attenuation of trichloroethene in an inland forested wetland: Bioremediation Journal, v. 11, no. 2, p. 85-102, https://doi.org/10.1080/10889860701429294.","startPage":"85","endPage":"102","numberOfPages":"18","costCenters":[],"links":[{"id":212929,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/10889860701429294"},{"id":240497,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eab8e4b0c8380cd48a2f","contributors":{"authors":[{"text":"Lorah, M.M.","contributorId":29002,"corporation":false,"usgs":true,"family":"Lorah","given":"M.M.","affiliations":[],"preferred":false,"id":425170,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dyer, L.J.","contributorId":87759,"corporation":false,"usgs":true,"family":"Dyer","given":"L.J.","email":"","affiliations":[],"preferred":false,"id":425171,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Burris, D.R.","contributorId":13037,"corporation":false,"usgs":true,"family":"Burris","given":"D.R.","email":"","affiliations":[],"preferred":false,"id":425169,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029987,"text":"70029987 - 2007 - Hydrodynamics of coalbed methane reservoirs in the Black Warrior Basin: Key to understanding reservoir performance and environmental issues","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029987","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Hydrodynamics of coalbed methane reservoirs in the Black Warrior Basin: Key to understanding reservoir performance and environmental issues","docAbstract":"The Black Warrior Basin of the southeastern United States hosts one of the world's most prolific and long-lived coalbed methane plays, and the wealth of experience in this basin provides insight into the relationships among basin hydrology, production performance, and environmental issues. Along the southeast margin of the basin, meteoric recharge of reservoir coal beds exposed in an upturned fold limb exerts a strong control on water chemistry, reservoir pressure, and production performance. Fresh-water plumes containing Na-HCO3 waters with low TDS content extend from the structurally upturned basin margin into the interior of the basin. Northwest of the plumes, coal beds contain Na-Cl waters with moderate to high-TDS content. Carbon isotope data from produced gas and mineral cements suggest that the fresh-water plumes have been the site of significant bacterial activity and that the coalbed methane reservoirs contain a mixture of thermogenic and late-stage biogenic gases. Water produced from the fresh-water plumes may be disposed safely at the surface, whereas underground injection has been used locally to dispose of highly saline water. Wells in areas that had normal hydrostatic reservoir pressure prior to development tend to produce large volumes of water and may take up to 4 a to reach peak gas production. In contrast, wells drilled in naturally underpressured areas distal to the fresh-water plumes typically produce little water and achieve peak gas rates during the first year of production. Environmental debate has focused largely on issues associated with hydrologic communication between deep reservoir coal beds and shallow aquifers. In the coalbed methane fields of the Black Warrior Basin, a broad range of geologic evidence suggests that flow is effectively confined within coal and that the thick intervals of marine shale separating coal zones limit cross-formational flow. ?? 2007 Elsevier Ltd. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Applied Geochemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.apgeochem.2007.04.009","issn":"08832927","usgsCitation":"Pashin, J., 2007, Hydrodynamics of coalbed methane reservoirs in the Black Warrior Basin: Key to understanding reservoir performance and environmental issues: Applied Geochemistry, v. 22, no. 10, p. 2257-2272, https://doi.org/10.1016/j.apgeochem.2007.04.009.","startPage":"2257","endPage":"2272","numberOfPages":"16","costCenters":[],"links":[{"id":212985,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.apgeochem.2007.04.009"},{"id":240561,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"22","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3340e4b0c8380cd5ee6e","contributors":{"authors":[{"text":"Pashin, J.C.","contributorId":41897,"corporation":false,"usgs":true,"family":"Pashin","given":"J.C.","affiliations":[],"preferred":false,"id":425185,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029990,"text":"70029990 - 2007 - Concentrations of metals in water, sediment, biofilm, benthic macroinvertebrates, and fish in the Boulder River watershed, Montana, and the role of colloids in metal uptake","interactions":[],"lastModifiedDate":"2018-10-11T18:39:29","indexId":"70029990","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":887,"text":"Archives of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Concentrations of metals in water, sediment, biofilm, benthic macroinvertebrates, and fish in the Boulder River watershed, Montana, and the role of colloids in metal uptake","docAbstract":"<p><span>To characterize the partitioning of metals in a stream ecosystem, concentrations of trace metals including As, Cd, Cu, Pb, and Zn were measured in water, colloids, sediment, biofilm (also referred to as&nbsp;</span><i class=\"EmphasisTypeItalic \">aufwuchs</i><span>), macroinvertebrates, and fish collected from the Boulder River watershed, Montana. Median concentrations of Cd, Cu, and Zn in water throughout the watershed exceeded the U.S. EPA acute and chronic criteria for protection of aquatic life. Concentrations of As, Cd, Cu, Pb, and Zn in sediment were sufficient in the tributaries to cause invertebrate toxicity. The concentrations of As, Cu, Cd, Pb, and Zn in invertebrates from lower Cataract Creek (63, 339, 59, 34, and 2,410&nbsp;μg/g dry wt, respectively) were greater than the concentrations in invertebrates from the Clark Fork River watershed, Montana (19, 174, 2.3, 15, and 648&nbsp;μg/g, respectively), that were associated with reduced survival, growth, and health of cutthroat trout fed diets composed of those invertebrates. Colloids and biofilm seem to play a critical role in the pathway of metals into the food chain and concentrations of As, Cu, Pb, and Zn in these two components are significantly correlated. We suggest that transfer of metals associated with Fe colloids to biological components of biofilm is an important pathway where metals associated with abiotic components are first available to biotic components. The significant correlations suggest that Cd, Cu, and Zn may move independently to biota (biofilm, invertebrates, or fish tissues) from water and sediment. The possibility exists that Cd, Cu, and Zn concentrations increase in fish tissues as a result of direct contact with water and sediment and indirect exposure through the food chain. However, uptake through the food chain to fish may be more important for As. Although As concentrations in colloids and biofilm were significantly correlated with As water concentrations, As concentrations in fish tissues were not correlated with water. The pathway for Pb into biological components seems to begin with sediment because concentrations of Pb in water were not significantly correlated with any other component and because concentrations of Pb in the water were often below detection limits.</span></p>","language":"English","publisher":"Springer-Verlag","doi":"10.1007/s00244-005-0021-z","issn":"00904341","usgsCitation":"Farag, A., Nimick, D.A., Kimball, B.A., Church, S.E., Harper, D.D., and Brumbaugh, W.G., 2007, Concentrations of metals in water, sediment, biofilm, benthic macroinvertebrates, and fish in the Boulder River watershed, Montana, and the role of colloids in metal uptake: Archives of Environmental Contamination and Toxicology, v. 52, no. 3, p. 397-409, https://doi.org/10.1007/s00244-005-0021-z.","productDescription":"13 p.","startPage":"397","endPage":"409","onlineOnly":"N","additionalOnlineFiles":"N","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":240625,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213045,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00244-005-0021-z"}],"country":"United States","state":"Montana","otherGeospatial":"Boulder River watershed","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -112.391667,\n              46.425\n            ],\n            [\n              -112.391667,\n              46.35\n            ],\n            [\n              -112.266667,\n              46.241667\n            ],\n            [\n              -112.15,\n              46.241667\n            ],\n            [\n              -112.15,\n              46.425\n            ],\n            [\n              -112.391667,\n              46.425\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"52","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-01-11","publicationStatus":"PW","scienceBaseUri":"5059f996e4b0c8380cd4d6b1","contributors":{"authors":[{"text":"Farag, Aida 0000-0003-4247-6763 aida_farag@usgs.gov","orcid":"https://orcid.org/0000-0003-4247-6763","contributorId":200690,"corporation":false,"usgs":true,"family":"Farag","given":"Aida","email":"aida_farag@usgs.gov","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":true,"id":425197,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"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":573,"text":"Special Applications Science Center","active":true,"usgs":true},{"id":5050,"text":"WY-MT Water Science Center","active":true,"usgs":true}],"preferred":true,"id":425194,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kimball, Briant A. bkimball@usgs.gov","contributorId":533,"corporation":false,"usgs":true,"family":"Kimball","given":"Briant","email":"bkimball@usgs.gov","middleInitial":"A.","affiliations":[{"id":610,"text":"Utah Water Science Center","active":true,"usgs":true}],"preferred":true,"id":425196,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Church, Stanley E. schurch@usgs.gov","contributorId":199165,"corporation":false,"usgs":true,"family":"Church","given":"Stanley","email":"schurch@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":425193,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Harper, David D. 0000-0001-7061-8461 david_harper@usgs.gov","orcid":"https://orcid.org/0000-0001-7061-8461","contributorId":1140,"corporation":false,"usgs":true,"family":"Harper","given":"David","email":"david_harper@usgs.gov","middleInitial":"D.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":false,"id":425195,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Brumbaugh, William G. 0000-0003-0081-375X bbrumbaugh@usgs.gov","orcid":"https://orcid.org/0000-0003-0081-375X","contributorId":493,"corporation":false,"usgs":true,"family":"Brumbaugh","given":"William","email":"bbrumbaugh@usgs.gov","middleInitial":"G.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":true,"id":425198,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70029997,"text":"70029997 - 2007 - Use of carboxylated microspheres to assess transport potential of Cryptosporidium parvum oocysts at the Russian River water supply facility, Sonoma County, California","interactions":[],"lastModifiedDate":"2018-10-16T10:25:59","indexId":"70029997","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1800,"text":"Geomicrobiology Journal","active":true,"publicationSubtype":{"id":10}},"title":"Use of carboxylated microspheres to assess transport potential of Cryptosporidium parvum oocysts at the Russian River water supply facility, Sonoma County, California","docAbstract":"<div id=\"35d9ca18-265e-4501-9038-4105e95a4b7d\" class=\"widget pageBody none  widget-none  widget-compact-all\"><div class=\"wrapped \"><div class=\"widget-body body body-none  body-compact-all\"><div class=\"page-body pagefulltext\"><div data-pb-dropzone=\"main\"><div id=\"f4a74f7a-9ba2-4605-86b1-8094cb1f01de\" class=\"widget responsive-layout none publicationContentBody widget-none\"><div class=\"wrapped \"><div class=\"widget-body body body-none \"><div class=\"container\"><div class=\"row row-md  \"><div class=\"col-md-7-12 \"><div class=\"contents\" data-pb-dropzone=\"contents1\"><div id=\"d29f04e9-776c-4996-a0d8-931023161e00\" class=\"widget literatumPublicationContentWidget none  widget-none  widget-compact-all\"><div class=\"wrapped \"><div class=\"widget-body body body-none  body-compact-all\"><div class=\"publication-tabs ja publication-tabs-dropdown\"><div class=\"tabs tabs-widget\"><div class=\"tab-content \"><div class=\"tab tab-pane active\"><div class=\"hlFld-Abstract\"><div class=\"abstractSection abstractInFull\"><p>Carboxylated microspheres were employed as surrogates to assess the transport potential of<span>&nbsp;</span><i>Cryptosporidium parvum</i>oocysts during forced- and natural-gradient tests conducted in July and October 2004. The tests involved poorly-sorted, near-surface sediments where groundwater is pumped from an alluvial aquifer underlying the Russian River, Sonoma County, CA. In an off channel infiltration basin and within the river, a mixture (2-, 3-, and 5- μm diameters) of fluorescently-labeled carboxylated microspheres and bromide tracers were used in two injection and recovery tests to assess sediment removal efficiency for the microspheres. Bottom sediments varied considerably in their filtration efficiency for<span>&nbsp;</span><i>Cryptosporidium</i>.</p></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geomicrobiology Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1080/01490450701456867","issn":"01490451","usgsCitation":"Metge, D.W., Harvey, R.W., Anders, R., Rosenberry, D.O., Seymour, D., and Jasperse, J., 2007, Use of carboxylated microspheres to assess transport potential of Cryptosporidium parvum oocysts at the Russian River water supply facility, Sonoma County, California: Geomicrobiology Journal, v. 24, no. 3-4, p. 231-245, https://doi.org/10.1080/01490450701456867.","productDescription":"15 p. ","startPage":"231","endPage":"245","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":240186,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212664,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/01490450701456867"}],"country":"United States","state":"California","county":"Sonoma County","otherGeospatial":"Russian River Water Supply Facility","volume":"24","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbecce4b08c986b3297c1","contributors":{"authors":[{"text":"Metge, David W. dwmetge@usgs.gov","contributorId":663,"corporation":false,"usgs":true,"family":"Metge","given":"David","email":"dwmetge@usgs.gov","middleInitial":"W.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":425225,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harvey, Ronald W. 0000-0002-2791-8503 rwharvey@usgs.gov","orcid":"https://orcid.org/0000-0002-2791-8503","contributorId":564,"corporation":false,"usgs":true,"family":"Harvey","given":"Ronald","email":"rwharvey@usgs.gov","middleInitial":"W.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":425223,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anders, Robert 0000-0002-2363-9072 randers@usgs.gov","orcid":"https://orcid.org/0000-0002-2363-9072","contributorId":1210,"corporation":false,"usgs":true,"family":"Anders","given":"Robert","email":"randers@usgs.gov","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":425228,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Rosenberry, Donald O. 0000-0003-0681-5641 rosenber@usgs.gov","orcid":"https://orcid.org/0000-0003-0681-5641","contributorId":1312,"corporation":false,"usgs":true,"family":"Rosenberry","given":"Donald","email":"rosenber@usgs.gov","middleInitial":"O.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":425224,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Seymour, Donald","contributorId":175253,"corporation":false,"usgs":false,"family":"Seymour","given":"Donald","email":"","affiliations":[{"id":17863,"text":"Sonoma County Water Agency","active":true,"usgs":false}],"preferred":false,"id":425226,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Jasperse, Jay","contributorId":168661,"corporation":false,"usgs":false,"family":"Jasperse","given":"Jay","affiliations":[{"id":17863,"text":"Sonoma County Water Agency","active":true,"usgs":false}],"preferred":false,"id":425227,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030000,"text":"70030000 - 2007 - Detection, attribution, and sensitivity of trends toward earlier streamflow in the Sierra Nevada","interactions":[],"lastModifiedDate":"2016-07-27T12:22:06","indexId":"70030000","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2316,"text":"Journal of Geophysical Research D: Atmospheres","active":true,"publicationSubtype":{"id":10}},"title":"Detection, attribution, and sensitivity of trends toward earlier streamflow in the Sierra Nevada","docAbstract":"<p>Observed changes in the timing of snowmelt dominated streamflow in the western United States are often linked to anthropogenic or other external causes. We assess whether observed streamflow timing changes can be statistically attributed to external forcing, or whether they still lie within the bounds of natural (internal) variability for four large Sierra Nevada (CA) basins, at inflow points to major reservoirs. Streamflow timing is measured by \"center timing\" (CT), the day when half the annual flow has passed a given point. We use a physically based hydrology model driven by meteorological input from a global climate model to quantify the natural variability in CT trends. Estimated 50-year trends in CT due to natural climate variability often exceed estimated actual CT trends from 1950 to 1999. Thus, although observed trends in CT to date may be statistically significant, they cannot yet be statistically attributed to external influences on climate. We estimate that projected CT changes at the four major reservoir inflows will, with 90% confidence, exceed those from natural variability within 1-4 decades or 4-8 decades, depending on rates of future greenhouse gas emissions. To identify areas most likely to exhibit CT changes in response to rising temperatures, we calculate changes in CT under temperature increases from 1 to 5??. We find that areas with average winter temperatures between -2??C and -4??C are most likely to respond with significant CT shifts. Correspondingly, elevations from 2000 to 2800 in are most sensitive to temperature increases, with CT changes exceeding 45 days (earlier) relative to 1961-1990. Copyright 2007 by the American Geophysical Union.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geophysical Research D: Atmospheres","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2006JD008088","issn":"01480227","usgsCitation":"Maurer, E., Stewart, I., Bonfils, C., Duffy, P.B., and Cayan, D., 2007, Detection, attribution, and sensitivity of trends toward earlier streamflow in the Sierra Nevada: Journal of Geophysical Research D: Atmospheres, v. 112, no. 11, https://doi.org/10.1029/2006JD008088.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":477109,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006jd008088","text":"Publisher Index Page"},{"id":240219,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212694,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2006JD008088"}],"volume":"112","issue":"11","noUsgsAuthors":false,"publicationDate":"2007-06-13","publicationStatus":"PW","scienceBaseUri":"5059ff7de4b0c8380cd4f210","contributors":{"authors":[{"text":"Maurer, E.P.","contributorId":30338,"corporation":false,"usgs":true,"family":"Maurer","given":"E.P.","email":"","affiliations":[],"preferred":false,"id":425234,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stewart, I.T.","contributorId":80062,"corporation":false,"usgs":true,"family":"Stewart","given":"I.T.","email":"","affiliations":[],"preferred":false,"id":425238,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bonfils, Celine","contributorId":51542,"corporation":false,"usgs":true,"family":"Bonfils","given":"Celine","email":"","affiliations":[],"preferred":false,"id":425236,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Duffy, P. B.","contributorId":77742,"corporation":false,"usgs":false,"family":"Duffy","given":"P.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":425237,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cayan, D.","contributorId":49563,"corporation":false,"usgs":true,"family":"Cayan","given":"D.","email":"","affiliations":[],"preferred":false,"id":425235,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030001,"text":"70030001 - 2007 - Hydrology and water quality in two mountain basins of the northeastern US: Assessing baseline conditions and effects of ski area development","interactions":[],"lastModifiedDate":"2012-03-12T17:21:10","indexId":"70030001","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Hydrology and water quality in two mountain basins of the northeastern US: Assessing baseline conditions and effects of ski area development","docAbstract":"Mountain regions throughout the world face intense development pressures associated with recreational and tourism uses. Despite these pressures, much of the research on bio-geophysical impacts of humans in mountain regions has focused on the effects of natural resource extraction. This paper describes findings from the first 3 years of a study examining high elevation watershed processes in a region undergoing alpine resort development. Our study is designed as a paired-watershed experiment. The Ranch Brook watershed (9.6 km2) is a relatively pristine, forested watershed and serves as the undeveloped 'control' basin. West Branch (11.7 km2) encompasses an existing alpine ski resort, with approximately 17% of the basin occupied by ski trails and impervious surfaces, and an additional 7% slated for clearing and development. Here, we report results for water years 2001-2003 of streamflow and water quality dynamics for these watersheds. Precipitation increases significantly with elevation in the watersheds, and winter precipitation represents 36-46% of annual precipitation. Artificial snowmaking from water within West Branch watershed currently augments annual precipitation by only 3-4%. Water yield in the developed basin exceeded that in the control by 18-36%. Suspended sediment yield was more than two and a half times greater and fluxes of all major solutes were higher in the developed basin. Our study is the first to document the effects of existing ski area development on hydrology and water quality in the northeastern US and will serve as an important baseline for evaluating the effects of planned resort expansion activities in this area.","largerWorkTitle":"Hydrological Processes","language":"English","doi":"10.1002/hyp.6700","issn":"08856087","usgsCitation":"Wemple, B., Shanley, J., Denner, J., Ross, D., and Mills, K., 2007, Hydrology and water quality in two mountain basins of the northeastern US: Assessing baseline conditions and effects of ski area development, <i>in</i> Hydrological Processes, v. 21, no. 12, p. 1639-1650, https://doi.org/10.1002/hyp.6700.","startPage":"1639","endPage":"1650","numberOfPages":"12","costCenters":[],"links":[{"id":240220,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212695,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.6700"}],"volume":"21","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-04-24","publicationStatus":"PW","scienceBaseUri":"505a36dde4b0c8380cd60a67","contributors":{"authors":[{"text":"Wemple, B.","contributorId":70257,"corporation":false,"usgs":true,"family":"Wemple","given":"B.","email":"","affiliations":[],"preferred":false,"id":425243,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shanley, J.","contributorId":37488,"corporation":false,"usgs":true,"family":"Shanley","given":"J.","affiliations":[],"preferred":false,"id":425242,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Denner, J.","contributorId":31215,"corporation":false,"usgs":true,"family":"Denner","given":"J.","email":"","affiliations":[],"preferred":false,"id":425240,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ross, D.","contributorId":7049,"corporation":false,"usgs":true,"family":"Ross","given":"D.","affiliations":[],"preferred":false,"id":425239,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mills, K.","contributorId":37036,"corporation":false,"usgs":true,"family":"Mills","given":"K.","affiliations":[],"preferred":false,"id":425241,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70035579,"text":"70035579 - 2007 - Integrating observation and statistical forecasts over sub-Saharan Africa to support Famine Early Warning","interactions":[],"lastModifiedDate":"2022-05-18T15:04:30.297996","indexId":"70035579","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Integrating observation and statistical forecasts over sub-Saharan Africa to support Famine Early Warning","docAbstract":"Famine early warning in Africa presents unique challenges and rewards. Hydrologic extremes must be tracked and anticipated over complex and changing climate regimes. The successful anticipation and interpretation of hydrologic shocks can initiate effective government response, saving lives and softening the impacts of droughts and floods. While both monitoring and forecast technologies continue to advance, discontinuities between monitoring and forecast systems inhibit effective decision making. Monitoring systems typically rely on high resolution satellite remote-sensed normalized difference vegetation index (NDVI) and rainfall imagery. Forecast systems provide information on a variety of scales and formats. Non-meteorologists are often unable or unwilling to connect the dots between these disparate sources of information. To mitigate these problem researchers at UCSB's Climate Hazard Group, NASA GIMMS and USGS/EROS are implementing a NASA-funded integrated decision support system that combines the monitoring of precipitation and NDVI with statistical one-to-three month forecasts. We present the monitoring/forecast system, assess its accuracy, and demonstrate its application in food insecure sub-Saharan Africa.","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"87th American Meteorological Society annual meeting","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"87th American Meteorological Society Annual Meeting","conferenceDate":"Jan 14-18, 2007","conferenceLocation":"San Antonio, TX","language":"English","publisher":"American Meteorological Society","usgsCitation":"Funk, C., Verdin, J.P., and Husak, G., 2007, Integrating observation and statistical forecasts over sub-Saharan Africa to support Famine Early Warning, <i>in</i> 87th American Meteorological Society annual meeting, San Antonio, TX, Jan 14-18, 2007.","numberOfPages":"20","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) 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cfunk@usgs.gov","orcid":"https://orcid.org/0000-0002-9254-6718","contributorId":167070,"corporation":false,"usgs":true,"family":"Funk","given":"Chris","email":"cfunk@usgs.gov","affiliations":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true},{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":true,"id":451322,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Verdin, James P. 0000-0003-0238-9657 verdin@usgs.gov","orcid":"https://orcid.org/0000-0003-0238-9657","contributorId":720,"corporation":false,"usgs":true,"family":"Verdin","given":"James","email":"verdin@usgs.gov","middleInitial":"P.","affiliations":[{"id":223,"text":"Earth Resources Observation and Science (EROS) Center (Geography)","active":false,"usgs":true}],"preferred":false,"id":451320,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Husak, Gregory","contributorId":145811,"corporation":false,"usgs":false,"family":"Husak","given":"Gregory","affiliations":[{"id":16236,"text":"UCSB Climate Hazards Group","active":true,"usgs":false}],"preferred":false,"id":451321,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030029,"text":"70030029 - 2007 - Effect of bedrock permeability on subsurface stormflow and the water balance of a trenched hillslope at the Panola Mountain Research Watershed, Georgia, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:36","indexId":"70030029","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Effect of bedrock permeability on subsurface stormflow and the water balance of a trenched hillslope at the Panola Mountain Research Watershed, Georgia, USA","docAbstract":"The effect of bedrock permeability on subsurface stormflow initiation and the hillslope water balance is poorly understood. Previous hillslope hydrological studies at the Panola Mountain Research Watershed (PMRW), Georgia, USA, have assumed that the bedrock underlying the trenched hillslope is effectively impermeable. This paper presents a series of sprinkling experiments where we test the bedrock impermeability hypothesis at the PMRW. Specifically, we quantify the bedrock permeability effects on hillslope subsurface stormflow generation and the hillslope water balance at the PMRW. Five sprinkling experiments were performed by applying 882-1676 mm of rainfall over a ???5.5 m ?? 12 m area on the lower hillslope during ???8 days. In addition to water input and output captured at the trench, we measured transpiration in 14 trees on the slope to close the water balance. Of the 193 mm day-1 applied during the later part of the sprinkling experiments when soil moisture changes were small, < 14 mm day-1 was collected at the trench and <4 mm day-1 was transpired by the trees, with residual bedrock leakage of > 175 mm day-1 (91%). Bedrock moisture was measured at three locations downslope of the water collection system in the trench. Bedrock moisture responded quickly to precipitation in early spring. Peak tracer breakthrough in response to natural precipitation in the bedrock downslope from the trench was delayed only 2 days relative to peak tracer arrival in subsurface stormflow at the trench. Leakage to bedrock influences subsurface stormflow at the storm time-scale and also the water balance of the hillslope. This has important implications for the age and geochemistry of the water and thus how one models this hillslope and watershed. Copyright ?? 2006 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.6265","issn":"08856087","usgsCitation":"Tromp-van, M.H., Peters, N., and McDonnell, J.J., 2007, Effect of bedrock permeability on subsurface stormflow and the water balance of a trenched hillslope at the Panola Mountain Research Watershed, Georgia, USA: Hydrological Processes, v. 21, no. 6, p. 750-769, https://doi.org/10.1002/hyp.6265.","startPage":"750","endPage":"769","numberOfPages":"20","costCenters":[],"links":[{"id":213101,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.6265"},{"id":240692,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"21","issue":"6","noUsgsAuthors":false,"publicationDate":"2006-09-22","publicationStatus":"PW","scienceBaseUri":"505a05c2e4b0c8380cd50f43","contributors":{"authors":[{"text":"Tromp-van, Meerveld H. J. H. J.","contributorId":54710,"corporation":false,"usgs":true,"family":"Tromp-van","given":"Meerveld","suffix":"H. J.","email":"","middleInitial":"H. J.","affiliations":[],"preferred":false,"id":425391,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peters, N.E.","contributorId":33332,"corporation":false,"usgs":true,"family":"Peters","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":425390,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McDonnell, Jeffery J. 0000-0002-3880-3162","orcid":"https://orcid.org/0000-0002-3880-3162","contributorId":62723,"corporation":false,"usgs":false,"family":"McDonnell","given":"Jeffery","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":425392,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030039,"text":"70030039 - 2007 - Simple predictions of maximum transport rate in unsaturated soil and rock","interactions":[],"lastModifiedDate":"2018-10-17T09:16:27","indexId":"70030039","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Simple predictions of maximum transport rate in unsaturated soil and rock","docAbstract":"<p><span>In contrast with the extreme variability expected for water and contaminant fluxes in the unsaturated zone, evidence from 64 field tests of preferential flow indicates that the maximum transport speed&nbsp;</span><i>V</i><sub>max</sub><span>, adjusted for episodicity of infiltration, deviates little from a geometric mean of 13 m/d. A model based on constant‐speed travel during infiltration pulses of actual or estimated duration can predict<span>&nbsp;</span></span><i>V</i><sub>max</sub><span><span>&nbsp;</span>with approximate order‐of‐magnitude accuracy, irrespective of medium or travel distance, thereby facilitating such problems as the prediction of worst‐case contaminant traveltimes. The lesser variability suggests that preferential flow is subject to rate‐limiting mechanisms analogous to those that impose a terminal velocity on objects in free fall and to rate‐compensating mechanisms analogous to Le Chatlier's principle. A critical feature allowing such mechanisms to dominate may be the presence of interfacial boundaries confined by neither solid material nor capillary forces.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005372","usgsCitation":"Nimmo, J.R., 2007, Simple predictions of maximum transport rate in unsaturated soil and rock: Water Resources Research, v. 43, no. 5, W05426; 11 p., https://doi.org/10.1029/2006WR005372.","productDescription":"W05426; 11 p.","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477005,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr005372","text":"Publisher Index Page"},{"id":240293,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"5","noUsgsAuthors":false,"publicationDate":"2007-05-22","publicationStatus":"PW","scienceBaseUri":"505b8f6ee4b08c986b318f17","contributors":{"authors":[{"text":"Nimmo, John R. 0000-0001-8191-1727 jrnimmo@usgs.gov","orcid":"https://orcid.org/0000-0001-8191-1727","contributorId":757,"corporation":false,"usgs":true,"family":"Nimmo","given":"John","email":"jrnimmo@usgs.gov","middleInitial":"R.","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":425421,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030053,"text":"70030053 - 2007 - Radium-226 accumulation in Florida freshwater mussels","interactions":[],"lastModifiedDate":"2013-01-18T21:32:19","indexId":"70030053","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Radium-226 accumulation in Florida freshwater mussels","docAbstract":"Selected lakes in Hillsborough County, Florida have been hydrologically augmented with groundwater to offset stage declines caused by excessive pumping of the Floridan Aquifer. Augmentation water can be relatively rich in 226Ra (>5 decays per minute [dpm] L-1). We measured 226Ra activities in shells and soft tissues of adult bivalve molluscs (Elliptio cf. buckleyi) from groundwater-augmented and nonaugmented lakes to assess bioaccumulation of 226Ra by mussels. Mussels from augmented lakes displayed higher 226Ra in both shells and tissues than did mussels from nonaugmented lakes. Within a sample, 226Ra activity in Elliptio tissues was higher than the value measured in shells. Highest activities were found in a composite mussel sample (n = 6) from an augmented lake; soft tissue activity was 619 ?? 33 dpm g-1 dry weight and shell activity was 147 ?? 7 dpm g-1 g dry weight. Large mussels displayed greater activities in soft tissues and shells than did small mussels. We transplanted animals from a nonaugmented lake into a groundwater-augmented water body. 226Ra activity in dry tissue rose from 32 ?? 1 to 196 ?? 2 dpm g-1 within 2 months. When 226Ra-rich mussels (232 ?? 2 dpm g-1) from the augmented lake were transferred to the nonaugmented lake, they showed no significant 226Ra loss over the 69-d experiment. Large Elliptio mussels concentrated 226Ra in their soft tissues to levels about 1,000 to 25,000 times concentrations in lake water. Pumping of groundwater in Florida for residential, agricultural, and industrial use contributes dissolved 226Ra to some surface water bodies, where it can be bioaccumulated by bivalve molluscs. ?? 2007, by the American Society of Limnology and Oceanography, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Limnology and Oceanography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.4319/lo.2007.52.4.1614","issn":"00243590","usgsCitation":"Brenner, M., Smoak, J., Leeper, D., Streubert, M., and Baker, S., 2007, Radium-226 accumulation in Florida freshwater mussels: Limnology and Oceanography, v. 52, no. 4, p. 1614-1623, https://doi.org/10.4319/lo.2007.52.4.1614.","startPage":"1614","endPage":"1623","numberOfPages":"10","costCenters":[],"links":[{"id":477024,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.4319/lo.2007.52.4.1614","text":"Publisher Index Page"},{"id":240533,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":265985,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.4319/lo.2007.52.4.1614"}],"volume":"52","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-07-31","publicationStatus":"PW","scienceBaseUri":"505a9430e4b0c8380cd81257","contributors":{"authors":[{"text":"Brenner, M.","contributorId":47984,"corporation":false,"usgs":true,"family":"Brenner","given":"M.","email":"","affiliations":[],"preferred":false,"id":425480,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Smoak, J.M.","contributorId":40384,"corporation":false,"usgs":true,"family":"Smoak","given":"J.M.","affiliations":[],"preferred":false,"id":425479,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Leeper, D.A.","contributorId":30044,"corporation":false,"usgs":true,"family":"Leeper","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":425478,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Streubert, M.","contributorId":79305,"corporation":false,"usgs":true,"family":"Streubert","given":"M.","affiliations":[],"preferred":false,"id":425481,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Baker, S.M.","contributorId":106319,"corporation":false,"usgs":true,"family":"Baker","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":425482,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70030079,"text":"70030079 - 2007 - The influence of river regulation and land use on floodplain forest regeneration in the semi-arid upper Colorado River Basin, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70030079","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3301,"text":"River Research and Applications","active":true,"publicationSubtype":{"id":10}},"title":"The influence of river regulation and land use on floodplain forest regeneration in the semi-arid upper Colorado River Basin, USA","docAbstract":"Flow regulation effects on floodplain forests in the semi-arid western United States are moderately well understood, whereas effects associated with changes in floodplain land use are poorly documented. We mapped land cover patterns from recent aerial photos and applied a classification scheme to mainstem alluvial floodplains in 10 subjectively selected 4th order hydrologic units (subbasins) in the Upper Colorado River Basin (UCRB) in order to document land use patterns (floodplain development) and assess their effects on Fremont cottonwood forest (CF) regeneration. Three of the mainstem rivers were unregulated, five were moderately regulated and two were highly regulated. We classified polygons as Undeveloped (with two categories, including CF) and Developed (with five categories). We ground-truthed 501 randomly selected polygons (4-28% of the floodplain area in each subbasin) to verify classification accuracy and to search for cottonwood regeneration, defined as stands established since regulation began or 1950, whichever is most recent. From 40% to 95% of the floodplain area remained undeveloped, but only 19-70% of the floodplain area was classified as forest. Regeneration occupied a mean of 5% (range 1-17%) of the floodplain. The likelihood of the presence of regeneration in a polygon was reduced 65% by development and independently in a complex manner by flow regulation. Our analyses indicate that floodplain forests may be in jeopardy on both regulated and unregulated rivers and that information on historical forest extent is needed to better understand their current status in the UCRB. Conservation efforts need to be coordinated at a regional level and address the potentially adverse affects of both flow regulation and floodplain development.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"River Research and Applications","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/rra.1007","issn":"15351459","usgsCitation":"Northcott, K., Andersen, D., and Cooper, D., 2007, The influence of river regulation and land use on floodplain forest regeneration in the semi-arid upper Colorado River Basin, USA: River Research and Applications, v. 23, no. 6, p. 565-577, https://doi.org/10.1002/rra.1007.","startPage":"565","endPage":"577","numberOfPages":"13","costCenters":[],"links":[{"id":212876,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/rra.1007"},{"id":240435,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"23","issue":"6","noUsgsAuthors":false,"publicationDate":"2007-03-09","publicationStatus":"PW","scienceBaseUri":"505bad35e4b08c986b323a66","contributors":{"authors":[{"text":"Northcott, K.","contributorId":89717,"corporation":false,"usgs":true,"family":"Northcott","given":"K.","email":"","affiliations":[],"preferred":false,"id":425623,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Andersen, D.C.","contributorId":19119,"corporation":false,"usgs":true,"family":"Andersen","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":425621,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Cooper, D.J.","contributorId":89489,"corporation":false,"usgs":true,"family":"Cooper","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":425622,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70030082,"text":"70030082 - 2007 - Suspended-sediment rating curve response to urbanization and wildfire, Santa Ana River, California","interactions":[],"lastModifiedDate":"2023-08-03T11:46:59.674325","indexId":"70030082","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2318,"text":"Journal of Geophysical Research F: Earth Surface","active":true,"publicationSubtype":{"id":10}},"title":"Suspended-sediment rating curve response to urbanization and wildfire, Santa Ana River, California","docAbstract":"<div class=\"\"><div class=\"article-section__content en main\"><p><span class=\"paraNumber\">[1]<span>&nbsp;</span></span>River suspended-sediment concentrations provide insights to the erosion and transport of materials from a landscape, and changes in concentrations with time may result from landscape processes or human disturbance. Here we show that suspended-sediment concentrations in the Santa Ana River, California, decreased 20-fold with respect to discharge during a 34-year period (1968−2001). These decreases cannot be attributed to changes in sampling technique or timing, nor to event or seasonal hysteresis. Annual peak and total discharge, however, reveal sixfold increases over the 34-year record, which largely explain the decreases in sediment concentration by a nonlinear dilution process. The hydrological changes were related to the widespread urbanization of the watershed, which resulted in increases in storm water discharge without detectable alteration of sediment discharge, thus reducing suspended-sediment concentrations. Periodic upland wildfire significantly increased water discharge, sediment discharge, and suspended-sediment concentrations and thus further altered the rating curve with time. Our results suggest that previous inventories of southern California sediment flux, which assume time-constant rating curves and extend these curves beyond the sampling history, may have substantially overestimated loads during the most recent decades.</p></div></div>","language":"English","publisher":"Wiley","doi":"10.1029/2006JF000662","issn":"01480227","usgsCitation":"Warrick, J., and Rubin, D.M., 2007, Suspended-sediment rating curve response to urbanization and wildfire, Santa Ana River, California: Journal of Geophysical Research F: Earth Surface, v. 112, no. F2, F02018; 15 p., https://doi.org/10.1029/2006JF000662.","productDescription":"F02018; 15 p.","numberOfPages":"15","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":240469,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Santa Ana River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -118.41271051114445,\n              34.09722314840016\n            ],\n            [\n              -118.41271051114445,\n              32.61130703952303\n            ],\n            [\n              -115.42571084170784,\n              32.61130703952303\n            ],\n            [\n              -115.42571084170784,\n              34.09722314840016\n            ],\n            [\n              -118.41271051114445,\n              34.09722314840016\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"112","issue":"F2","noUsgsAuthors":false,"publicationDate":"2007-05-18","publicationStatus":"PW","scienceBaseUri":"505ba314e4b08c986b31fb87","contributors":{"authors":[{"text":"Warrick, J.A.","contributorId":53503,"corporation":false,"usgs":true,"family":"Warrick","given":"J.A.","affiliations":[],"preferred":false,"id":425635,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rubin, D. M.","contributorId":103689,"corporation":false,"usgs":true,"family":"Rubin","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":425636,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}