Chemical mass balances for sodium, magnesium, chloride, dissolved organic carbon, and oxygen 18 were used to estimate groundwater seepage to and from Williams Lake, Minnesota, over a 15-month period, from April 1991 through June 1992. Groundwater seepage to the lake and seepage from the lake to groundwater were determined independently using a flow net approach using data from water table wells installed as part of the study. Hydrogeological analysis indicated groundwater seepage to the lake accounted for 74% of annual water input to the lake; the remainder came from atmospheric precipitation, as determined from a gage in the watershed and from nearby National Weather Service gages. Seepage from the lake accounted for 69% of annual water losses from the lake; the remainder was removed by evaporation, as determined by the energy budget method. Calculated annual water loss exceeded calculated annual water gain, and this imbalance was double the value of the independently measured decrease in lake volume. Seepage to the lake determined from oxygen 18 was larger (79% of annual water input) than that determined from the flow net approach and made the difference between calculated annual water gain and loss consistent with the independently measured decrease in lake volume. Although the net difference between volume of seepage to the lake and volume of seepage from the lake was 1% of average lake volume, movement of water into and out of the lake by seepage represented an annual exchange of groundwater with the lake equal to 26–27% of lake volume. Estimates of seepage to the lake from sodium, magnesium, chloride, and dissolved organic carbon did not agree with the values determined from flow net approach or oxygen 18. These results indicated the importance of using a combination of hydrogeological and chemical approaches to define volume of seepage to and from Williams Lake and identify uncertainties in chemical fluxes.
","language":"English","publisher":"American Geophysical Union","doi":"10.1029/97WR02427","usgsCitation":"LaBaugh, J.W., Winter, T.C., Rosenberry, D.O., Schuster, P.F., Reddy, M.M., and Aiken, G.R., 1997, Hydrological and chemical estimates of the water balance of a closed-basin lake in north central Minnesota: Water Resources Research, v. 33, no. 12, p. 2799-2812, https://doi.org/10.1029/97WR02427.","productDescription":"14 p.","startPage":"2799","endPage":"2812","costCenters":[],"links":[{"id":226431,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Minnesota","otherGeospatial":"Williams Lake","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -94.67612028121948,\n 46.948504487557834\n ],\n [\n -94.66281652450562,\n 46.948504487557834\n ],\n [\n -94.66281652450562,\n 46.9591673117941\n ],\n [\n -94.67612028121948,\n 46.9591673117941\n ],\n [\n -94.67612028121948,\n 46.948504487557834\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"33","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a36a9e4b0c8380cd608c3","contributors":{"authors":[{"text":"LaBaugh, James W. 0000-0002-4112-2536 jlabaugh@usgs.gov","orcid":"https://orcid.org/0000-0002-4112-2536","contributorId":1311,"corporation":false,"usgs":true,"family":"LaBaugh","given":"James","email":"jlabaugh@usgs.gov","middleInitial":"W.","affiliations":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":27111,"text":"National Water Quality Program","active":true,"usgs":true}],"preferred":true,"id":383053,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Winter, Thomas C.","contributorId":84736,"corporation":false,"usgs":true,"family":"Winter","given":"Thomas","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":383054,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"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":383057,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schuster, Paul F. 0000-0002-8314-1372 pschuste@usgs.gov","orcid":"https://orcid.org/0000-0002-8314-1372","contributorId":1360,"corporation":false,"usgs":true,"family":"Schuster","given":"Paul","email":"pschuste@usgs.gov","middleInitial":"F.","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":383056,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Reddy, Michael M. mmreddy@usgs.gov","contributorId":684,"corporation":false,"usgs":true,"family":"Reddy","given":"Michael","email":"mmreddy@usgs.gov","middleInitial":"M.","affiliations":[{"id":145,"text":"Branch of Regional Research-Central Region","active":false,"usgs":true}],"preferred":true,"id":383055,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Aiken, George R. 0000-0001-8454-0984 graiken@usgs.gov","orcid":"https://orcid.org/0000-0001-8454-0984","contributorId":1322,"corporation":false,"usgs":true,"family":"Aiken","given":"George","email":"graiken@usgs.gov","middleInitial":"R.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true},{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":383052,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70019539,"text":"70019539 - 1997 - Microbial reduction of iodate","interactions":[],"lastModifiedDate":"2019-02-14T06:39:11","indexId":"70019539","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3728,"text":"Water, Air, & Soil Pollution","onlineIssn":"1573-2932","printIssn":"0049-6979","active":true,"publicationSubtype":{"id":10}},"title":"Microbial reduction of iodate","docAbstract":"The different oxidation species of iodine have markedly different sorption properties. Hence, changes in iodine redox states can greatly affect the mobility of iodine in the environment. Although a major microbial role has been suggested in the past to account for these redox changes, little has been done to elucidate the responsible microorganisms or the mechanisms involved. In the work presented here, direct microbial reduction of iodate was demonstrated with anaerobic cell suspensions of the sulfate reducing bacterium Desulfovibrio desulfuricans which reduced 96% of an initial 100 ??M iodate to iodide at pH 7 in 30 mM NaHCO3 buffer, whereas anaerobic cell suspensions of the dissimilatory Fe(III)-reducing bacterium Shewanella putrefaciens were unable to reduce iodate in 30 mM NaHCO3 buffer (pH 7). Both D. desulfuricans and S. putrefaciens were able to reduce iodate at pH 7 in 10 mM HEPES buffer. Both soluble ferrous iron and sulfide, as well as iron monosulfide (FeS) were shown to abiologically reduce iodate to iodide. These results indicate that ferric iron and/or sulfate reducing bacteria are capable of mediating both direct, enzymatic, as well as abiotic reduction of iodate in natural anaerobic environments. These microbially mediated reactions may be important factors in the fate and transport of 129I in natural systems.","language":"English","publisher":"Kluwer ","doi":"10.1023/A:1018370423790","issn":"00496979","usgsCitation":"Councell, T., Landa, E.R., and Lovley, D.R., 1997, Microbial reduction of iodate: Water, Air, & Soil Pollution, v. 100, no. 1-2, p. 99-106, https://doi.org/10.1023/A:1018370423790.","productDescription":"8 p.","startPage":"99","endPage":"106","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":267628,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1023/A:1018370423790"},{"id":228082,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"100","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a565be4b0c8380cd6d52b","contributors":{"authors":[{"text":"Councell, T.B.","contributorId":44187,"corporation":false,"usgs":true,"family":"Councell","given":"T.B.","email":"","affiliations":[],"preferred":false,"id":383102,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Landa, E. R.","contributorId":100002,"corporation":false,"usgs":true,"family":"Landa","given":"E.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":383103,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lovley, Derek R.","contributorId":107852,"corporation":false,"usgs":true,"family":"Lovley","given":"Derek","middleInitial":"R.","affiliations":[],"preferred":false,"id":383104,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70019549,"text":"70019549 - 1997 - Use of chemical and isotopic tracers to characterize the interactions between ground water and surface water in mantled karst","interactions":[],"lastModifiedDate":"2020-01-08T06:23:47","indexId":"70019549","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Use of chemical and isotopic tracers to characterize the interactions between ground water and surface water in mantled karst","docAbstract":"In the mantled karst terrane of northern Florida, the water quality of the Upper Floridan aquifer is influenced by the degree of connectivity between the aquifer and the surface. Chemical and isotopic analyses [18O/16O (δ18O), 2H/1H (δD), 13C/12C (δ13C), tritium (3H), and strontium‐87/strontium‐86 (87Sr/86Sr)] along with geochemical mass‐balance modeling were used to identify the dominant hydrochemical processes that control the composition of ground water as it evolves downgradient in two systems. In one system, surface water enters the Upper Floridan aquifer through a sinkhole located in the Northern Highlands physiographic unit. In the other system, surface water enters the aquifer through a sinkhole lake (Lake Bradford) in the Woodville Karst Plain. Differences in the composition of water isotopes (δ18O and <δD) in rainfall, ground water, and surface water were used to develop mixing models of surface water (leakage of water to the Upper Floridan aquifer from a sinkhole lake and a sinkhole) and ground water. Using mass‐balance calculations, based on differences in δ18O and δD, the proportion of lake water that mixed with meteoric water ranged from 7 to 86% in water from wells located in close proximity to Lake Bradford. In deeper parts of the Upper Floridan aquifer, water enriched in 18O and D from five of 12 sampled municipal wells indicated that recharge from a sinkhole (1 to 24%) and surface water with an evaporated isotopic signature (2 to 32%) was mixing with ground water.
The solute isotopes, δ13C and 87Sr/86Sr, were used to test the sensitivity of binary and ternary mixing models, and to estimate the amount of mass transfer of carbon and other dissolved species in geochemical reactions. In ground water downgradient from Lake Bradford, the dominant processes controlling carbon cycling in ground water were dissolution of carbonate minerals, aerobic degradation of organic matter, and hydrolysis of silicate minerals. In the deeper parts of the Upper Floridan aquifer, the major processes controlling the concentrations of major dissolved species included dissolution of calcite and dolomite, and degradation of organic matter under oxic conditions. The Upper Floridan aquifer is highly susceptible to contamination from activities at the land surface in the Tallahassee area. The presence of post‐ 1950s concentrations of 3H in ground water from depths greater than 100 m below land surface indicates that water throughout much of the Upper Floridan aquifer has been recharged during the last 40 years. Even though mixing is likely between ground water and surface water in many parts of the study area, the Upper Floridan aquifer produces good quality water, which due to dilution effects shows little if any impact from trace elements or nutrients that are present in surface waters.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.1997.tb00174.x","issn":"0017467X","usgsCitation":"Katz, B., Coplen, T., Bullen, T., and Hal Davis, J., 1997, Use of chemical and isotopic tracers to characterize the interactions between ground water and surface water in mantled karst: Ground Water, v. 35, no. 6, p. 1014-1028, https://doi.org/10.1111/j.1745-6584.1997.tb00174.x.","productDescription":"15 p.","startPage":"1014","endPage":"1028","numberOfPages":"15","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":228236,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"35","issue":"6","noUsgsAuthors":false,"publicationDate":"2005-08-04","publicationStatus":"PW","scienceBaseUri":"505bbed3e4b08c986b3297da","contributors":{"authors":[{"text":"Katz, B. G.","contributorId":82702,"corporation":false,"usgs":true,"family":"Katz","given":"B. G.","affiliations":[],"preferred":false,"id":383141,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Coplen, T.B.","contributorId":34147,"corporation":false,"usgs":true,"family":"Coplen","given":"T.B.","affiliations":[],"preferred":false,"id":383138,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bullen, T.D.","contributorId":79911,"corporation":false,"usgs":true,"family":"Bullen","given":"T.D.","email":"","affiliations":[],"preferred":false,"id":383140,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hal Davis, J.","contributorId":70947,"corporation":false,"usgs":true,"family":"Hal Davis","given":"J.","email":"","affiliations":[],"preferred":false,"id":383139,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70019550,"text":"70019550 - 1997 - Organic and inorganic nitrogen pools in talus fields and subtalus water, Green Lakes Valley, Colorado front range","interactions":[],"lastModifiedDate":"2024-03-27T10:59:46.446932","indexId":"70019550","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","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":"Organic and inorganic nitrogen pools in talus fields and subtalus water, Green Lakes Valley, Colorado front range","docAbstract":"Organic and inorganic pools of nitrogen (N) were measured in talus fines or ‘soils’ and subtalus water during the summer of 1995 in the alpine Green Lakes Valley catchment of the Colorado Front Range. Nineteen talus soil samples were divided into four classes: subtalus dry, subtalus wet, surface vegetated and surface bare. The size of the individual talus soil patches ranged from 0·5 to 12·0 m2 in area, with bulk density ranging from 0·98 to 1·71 kg m−3 and soil texture ranging from sandy gravel in the subsurface talus to a loam in the vegetated surface. All samples contained KCl-extractable NH+4 and NO−3, organic N and carbon (C), and 17 of 19 samples contained microbial biomass. The mean subtalus values for KCl-extractable NH−4, of 3·2 mg N kg−1, and NO−3, of 1·0 mg N kg−1, were comparable with developed alpine soils on Niwot Ridge. Average microbial biomass in subtalus soils of 5·4 mg N kg−1 and total N of 1000 mg N kg−1 were about an order of magnitude lower than alpine tundra soils, reflecting the reduced amount of vegetation in talus areas. However, these measurements in surface-vegetated patches of talus were comparable with the well-developed soils on Niwot Ridge. These measurements in talus of microbial biomass, total N and KCl-extractable NH+4 and NO−3, show that there is sufficient biotically conditioned ‘soil’ within talus fields to influence the solute content of interstitial waters. Mean NO−3 concentrations of 20 μeq l−1 from 29 samples of subtalus water were significantly higher than the 6·7 μeq l−1 in snow, while NH+4 concentrations in subtalus water of 0·7 μeq l−1 was significantly lower than in snow at 5·2 μeq l−1 (p = 0·001). Nitrate concentrations in subtalus water were significantly (p < 0·0001) correlated with concentrations of geochemical weathering products such as Ca2+ (r2 = 0·84) and silica (r2 = 0·49). The correlation of NO−3 in subtalus water with geochemical weathering products suggests that NO−3 concentrations in subtalus water increased with increased residence time, consistent with a biological source for this subtalus water NO−3. The high NO−3 concentrations in subtalus water compared with atmospheric deposition of NO−3 suggests that NO−3 in talus fields may contribute to NO−3 in stream waters of high-elevation catchments.
Stream bed temperature profiles were monitored continuously during water year 1990 and 1991 (WY90 and 91) in two New Mexico arroyos, similar in their meteorological features and dissimilar in their hydrological features. Stream bed temperature profiles between depths of 30 and 300 cm were examined to determine whether temporal changes in temperature profiles represent accurate indicators of the timing, depth and duration of percolation in each stream bed. These results were compared with stream flow, air temperature, and precipitation records for WY90 and 91, to evaluate the effect of changing surface conditions on temperature profiles. Temperature profiles indicate a persistently high thermal gradient with depth beneath Grantline Arroyo, except during a semi-annual thermal reversal in spring and autumn. This typifies the thermal response of dry sediments with low thermal conductivities. High thermal gradients were disrupted only during infrequent stream flows, followed by rapid re-establishment of high gradients. The stream bed temperature at 300 cm was unresponsive to individual precipitation or stream flow during WY90 and 91. This thermal pattern provides strong evidence that most seepage into Grantline Arroyo failed to percolate at a sufficient rate to reach 300 cm before being returned to the atmosphere. A distinctly different thermal pattern was recorded beneath Tijeras Arroyo. Low thermal gradients between 30 and 300 cm and large diurnal variations in temperature, suggest that stream flow created continuous, advection-dominated heat transport for over 300 days, annually. Beneath Tijeras Arroyo, low thermal gradients were interrupted only briefly during periodic, dry summer conditions. Comparisons of stream flow records for WY90 and 91 with stream bed temperature profiles indicate that independent analysis of thermal patterns provides accurate estimates of the timing, depth and duration of percolation beneath both arroyos. Stream flow loss estimates indicate that seepage rates were 15 times greater for Tijeras Arroyo than for Grantline Arroyo, which supports qualitative conclusions derived from analysis of stream bed temperature responses to surface conditions.
","language":"English","publisher":"Wiley","doi":"10.1002/(SICI)1099-1085(19971015)11:12<1621::AID-HYP493>3.0.CO;2-X","issn":"08856087","usgsCitation":"Constantz, J., and Thomas, C.L., 1997, Stream bed temperature profiles as indicators of percolation characteristics beneath arroyos in the middle Rio Grande Basin, USA: Hydrological Processes, v. 11, no. 12, p. 1621-1634, https://doi.org/10.1002/(SICI)1099-1085(19971015)11:12<1621::AID-HYP493>3.0.CO;2-X.","productDescription":"14 p.","startPage":"1621","endPage":"1634","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":227793,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9a63e4b08c986b31c8f4","contributors":{"authors":[{"text":"Constantz, J.","contributorId":29953,"corporation":false,"usgs":true,"family":"Constantz","given":"J.","email":"","affiliations":[],"preferred":false,"id":383172,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thomas, C. L.","contributorId":43802,"corporation":false,"usgs":true,"family":"Thomas","given":"C.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":383173,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70019561,"text":"70019561 - 1997 - Response characteristics of DOC flushing in an alpine catchment","interactions":[],"lastModifiedDate":"2019-02-08T16:53:40","indexId":"70019561","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","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":"Response characteristics of DOC flushing in an alpine catchment","docAbstract":"The spatial distribution of source areas and associated residence times of water in the catchment are significant factors controlling the annual cycles of dissolved organic carbon (DOC) concentration in Deer Creek (Summit County, Colorado). During spring snowmelt (April-August 1992), stream DOC concentrations increased with the rising limb of the hydrograph, peaked before maximum discharge, then declined rapidly as melting continued. We investigated catchment sources of DOC to streamflow, measuring DOC in tension lysimeters, groundwater wells, snow and streamflow. Lysimeter data indicate that near-surface soil horizons are a primary contributor of DOC to streamflow during spring snowmelt. Concentrations of DOC in the lysimeters decrease rapidly during the melt period, supporting the hypothesis that hydrological flushing of catchment soils is the primary mechanism affecting the temporal variation of DOC in Deer Creek. Time constants of DOC flushing, characterizing the exponential decay of DOC concentration in the upper soil horizon, ranged from 10 to 30 days for the 10 lysimeter sites. Differences in the rate of flushing are influenced by topographical position, with near-stream riparian soils flushed more quickly than soils located further upslope. Variation in the amount of distribution of accumulated snow, and asynchronous melting of the snowpack across the landscape, staggered the onset of the spring flush throughout the catchment, prolonging the period of increased concentrations of DOC in the stream. Streamflow integrates the catchment-scale flushing responses, yielding a time constant associated with the recession of DOC in the stream channel (84 days) that is significantly longer than the time constants observed for particular locations in the upper soil.
","language":"English","publisher":"Wiley","doi":"10.1002/(SICI)1099-1085(19971015)11:12<1635::AID-HYP494>3.0.CO;2-H","issn":"08856087","usgsCitation":"Boyer, E., Hornberger, G., Bencala, K., and McKnight, D.M., 1997, Response characteristics of DOC flushing in an alpine catchment: Hydrological Processes, v. 11, no. 12, p. 1635-1647, https://doi.org/10.1002/(SICI)1099-1085(19971015)11:12<1635::AID-HYP494>3.0.CO;2-H.","productDescription":"13 p.","startPage":"1635","endPage":"1647","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":227794,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aaa11e4b0c8380cd86110","contributors":{"authors":[{"text":"Boyer, E.W.","contributorId":56358,"corporation":false,"usgs":false,"family":"Boyer","given":"E.W.","email":"","affiliations":[{"id":6738,"text":"The Pennsylvania State University","active":true,"usgs":false}],"preferred":false,"id":383174,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hornberger, G.M.","contributorId":68463,"corporation":false,"usgs":true,"family":"Hornberger","given":"G.M.","email":"","affiliations":[],"preferred":false,"id":383176,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bencala, K.E.","contributorId":105312,"corporation":false,"usgs":true,"family":"Bencala","given":"K.E.","email":"","affiliations":[],"preferred":false,"id":383177,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"McKnight, Diane M.","contributorId":59773,"corporation":false,"usgs":false,"family":"McKnight","given":"Diane","email":"","middleInitial":"M.","affiliations":[{"id":16833,"text":"INSTAAR, University of Colorado","active":true,"usgs":false}],"preferred":false,"id":383175,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70019578,"text":"70019578 - 1997 - Volumetric analysis and hydrologic characterization of a modern debris flow near Yucca Mountain, Nevada","interactions":[],"lastModifiedDate":"2024-02-02T12:07:21.739674","indexId":"70019578","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1801,"text":"Geomorphology","active":true,"publicationSubtype":{"id":10}},"title":"Volumetric analysis and hydrologic characterization of a modern debris flow near Yucca Mountain, Nevada","docAbstract":"On July 21 or 22, 1984, debris flows triggered by rainfall occurred on the southern hillslope of Jake Ridge, about 6 km east of the crest of Yucca Mountain, Nevada. Rain gages near Jake Ridge recorded 65 mm and 69 mm on July 21, and 20 mm and 17 mm on July 22. Rates of rainfall intensity ranged up to 73 mm/h on the twenty-first, and 15 mm/h on the twenty-second. Digital elevation models with 2.0 m grid-node spacing, measured from pre-storm and post-storm aerial stereo-photographs, were used to map hillslope erosion and the downslope distribution of debris. Volumetric calculations indicate that about 7040 m3 of debris was redistributed on the 49,132 m2 hillslope study area during the two-day storm period. About 4580 m3 (65%) of the eroded sediment was deposited within the study area and the remaining 35% was deposited outside the study area in a short tributary to Fortymile Wash and in the wash itself. The maximum and mean depths of erosion in the study area were about 1.8 m and 5 cm, respectively. The mean depths of erosion on the upper and middle hillslope were 27 cm and 4 cm, respectively. The mean depth of deposition on the lower hillslope was 16 cm.
Analysis of the values of cumulative precipitation in the context of the precipitation-frequency atlas of the National Oceanic and Atmospheric Administration indicates that precipitation from the main storm on July 21 was more than double that expected, on average, once during a 100-year-period. The relations of precipitation intensity/duration, developed from data recorded at a nearby precipitation gage, indicate a storm interval of 500 years or greater. The amount of erosion caused by such a storm is primarily dependent on three variables; storm intensity, development of the drainage network on the hillslope, and the amount of available colluvium. Additionally, the erosive ability of successive storms of equal intensity will decrease because such storms would tend to progressively isolate and reduce the amount of colluvium available. The preservation of Pleistocene deposits on hillslopes of Yucca Mountain, in general, indicates that erosional events that strip 5% of the available hillslope colluvium must be quite rare. We conclude that the recurrence interval of an erosional event comparable to the July, 1984 event is probably much longer than 500 years.
The kinetics of anaerobic mineralization of DCE and VC under methanogenic and Fe(III)-reducing conditions as a function of dissolved contaminant concentration were evaluated. Microorganisms indigenous to creek bed sedi ments, where groundwater contaminated with chlorinated ethenes continuously discharges, demonstrated significant mineralization of DCE and VC under methanogenic and Fe(III)-reducing conditions. Over 37 days, the recovery of [1,2-14C]VC radioactivity as 14CO2 ranged from 5% to 44% and from 8% to 100% under methanogenic and Fe(III)-reducing conditions, respectively. The recovery of [1,2-14C]DCE radioactivity as 14CO2ranged from 4% to 14% and did not vary significantly between methanogenic and Fe(III)-reducing conditions. VC mineralization was described by Michaelis−Menten kinetics. Under methanogenic condi tions, Vmax was 0.19 ± 0.01 μmol L-1 d-1 and the half-saturation constant, km, was 7.6 ± 1.7 μM. Under Fe(III)-reducing conditions, Vmax was 0.76 ± 0.07 μmol L-1 d-1 and km was 1.3 ± 0.5 μM. In contrast, DCE mineralization could be described by first-order kinetics. The first-order degradation rate constant for DCE mineralization was 0.6 ± 0.2% d-1 under methanogenic and Fe(III)-reducing conditions. The results indicate that the kinetics of chlorinated ethene mineralization can vary significantly with the specific contaminant and the predominant redox conditions under which mineralization occurs.
We have developed an approach which examines ecosystem function and the potential effects of climatic shifts. The Lake McDonald watershed of Glacier National Park was the focus for two linked research activities: acquisition of baseline data on hydrologic, chemical and aquatic organism attributes that characterize this pristine northern rocky mountain watershed, and further developing the Regional Hydro-Ecosystem Simulation System (RHESSys), a collection of integrated models which collectively provide spatially explicit, mechanistically-derived outputs of ecosystem processes, including hydrologic outflow, soil moisture, and snowpack water equivalence. In this unique setting field validation of RHESSys, outputs demonstrated that reasonable estimates of SWE and streamflow are being produced. RHESSys was used to predict annual stream discharge and temperature. The predictions, in conjunction with the field data, indicated that aquatic resources of the park may be significantly affected. Utilizing RHESSys to predict potential climate scenarios and response of other key ecosystem components can provide scientific insights as well as proactive guidelines for national park management.
","language":"English","publisher":"American Water Resources Association","doi":"10.1111/j.1752-1688.1997.tb04103.x","issn":"1093474X","usgsCitation":"Fagre, D., Comanor, P., White, J., Hauer, F.R., and Running, S.W., 1997, Watershed responses to climate change at Glacier National Park: Journal of the American Water Resources Association, v. 33, no. 4, p. 755-765, https://doi.org/10.1111/j.1752-1688.1997.tb04103.x.","productDescription":"11 p.","startPage":"755","endPage":"765","numberOfPages":"11","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":227677,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"33","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"505bcf79e4b08c986b32e902","contributors":{"authors":[{"text":"Fagre, D.B.","contributorId":52135,"corporation":false,"usgs":true,"family":"Fagre","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":383397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Comanor, P.L.","contributorId":47103,"corporation":false,"usgs":true,"family":"Comanor","given":"P.L.","email":"","affiliations":[],"preferred":false,"id":383395,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"White, J.D.","contributorId":42923,"corporation":false,"usgs":true,"family":"White","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":383394,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hauer, F. Richard","contributorId":76892,"corporation":false,"usgs":true,"family":"Hauer","given":"F.","email":"","middleInitial":"Richard","affiliations":[],"preferred":false,"id":383398,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Running, S. W.","contributorId":51257,"corporation":false,"usgs":false,"family":"Running","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":383396,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70019645,"text":"70019645 - 1997 - The design of sampling transects for characterizing water quality in estuaries","interactions":[],"lastModifiedDate":"2019-02-04T10:31:20","indexId":"70019645","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1587,"text":"Estuarine, Coastal and Shelf Science","active":true,"publicationSubtype":{"id":10}},"title":"The design of sampling transects for characterizing water quality in estuaries","docAbstract":"The high spatial variability of estuaries poses a challenge for characterizing estuarine water quality. This problem was examined by conducting monthly high-resolution transects for several water quality variables (chlorophyll a, suspended particulate matter and salinity) in San Francisco Bay (California, U.S.A.). Using these data, six different ways of choosing station locations along a transect, in order to estimate mean conditions, were compared. In addition, 11 approaches to estimating the variance of the transect mean when stations are equally spaced were compared, and the relationship between variance of the estimated transect mean and number of stations was determined. The results provide guidelines for sampling along the axis of an estuary: (1) choose as many equally-spaced stations as practical; (2) estimate the variance of the meanyby var (y)=(1/10n2)Σnj=2(yj−yj−1)2, wherey1, . . .,ynare the measurements at thenstations; and (3) attain the desired precision by adjusting the number of stations according to var(y)α1/n2. The inverse power of 2 in the last step is a consequence of the underlying spatial correlation structure in San Francisco Bay; more studies of spatial structure at other estuaries are needed to determine the generality of this relationship.
To determine the relations between land use and concentrations of selected agricultural chemicals (nitrate, atrazine residue [atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) + deethylatrazinc (2-amino-4-chloro-6-isopropylamino-s-triazine) + deisopropylatrazine (2-amino-4-chloro-6-ethylamino-s-triazine)], and alachlor residue [alachlor, [2-chloro-2′,6′-diethyl-N-(methoxymethyl) acetanilide] + alachlor ethanesulfonic acid (alachlor-ESA; 2-[(2,6-diethylphenyl)(methoxymethyl)amino]-2-oxoethanesulfonic acid)] in groundwater, detailed land use information based on accurate measurements from aerial photographs for the 1991 growing season was obtained within a 2-km radius surrounding 100 wells completed in near-surface unconsolidated aquifers in the midwestern USA. The most significant land use factors to the agricultural chemicals examined were: nitrate (amount of irrigated crop production, positive relation), atrazine residue (amount of irrigated crop production, positive relation), and alachlor residue (amount of highly erodible land, inverse relation). The investigation of smaller buffer sizes (size of circular area around sampled wells) proved insightful for this study. Additional land use factors having significant relations to all three agricultural chemicals were identified using these smaller buffer radii. The most significant correlations (correlation maxima) generally occurred at ≤500-m for nitrate and ≥1000-m for atrazine residue and alachlor residue. An attempt to improve the statistical relations to land use by taking hydrologic considerations into account (removing land outside the estimated most probable recharge area from the statistical analysis) was not as successful as anticipated. Only 45% of the nitrate, 32% of the atrazine residue, and 20% of the alachlor residue correlations were improved by a consideration of the estimated most probable recharge area.
","language":"English","publisher":"ACSESS","doi":"10.2134/jeq1997.00472425002600040014x","issn":"00472425","usgsCitation":"Kolpin, D., 1997, Agricultural chemicals in groundwater of the midwestern United States: Relations to land use: Journal of Environmental Quality, v. 26, no. 4, p. 1025-1037, https://doi.org/10.2134/jeq1997.00472425002600040014x.","productDescription":"13 p.","startPage":"1025","endPage":"1037","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":351,"text":"Iowa Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":228019,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","volume":"26","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e912e4b0c8380cd48096","contributors":{"authors":[{"text":"Kolpin, D.W.","contributorId":87565,"corporation":false,"usgs":true,"family":"Kolpin","given":"D.W.","email":"","affiliations":[],"preferred":false,"id":383761,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70019742,"text":"70019742 - 1997 - Microorganisms as tracers in groundwater injection and recovery experiments: A review","interactions":[],"lastModifiedDate":"2019-02-13T16:26:42","indexId":"70019742","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1621,"text":"FEMS Microbiology Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Microorganisms as tracers in groundwater injection and recovery experiments: A review","docAbstract":"Modern day injection and recovery techniques designed to examine the transport behavior of microorganisms in groundwater have evolved from experiments conducted in the late 1800s, in which bacteria that form red or yellow pigments were used to trace flow paths through karst and fractured- rock aquifers. A number of subsequent groundwater hydrology studies employed bacteriophage that can be injected into aquifers at very high concentrations (e g., 1013 phage ml-1) and monitored through many log units of dilution to follow groundwater flow paths for great distances, particularly in karst terrain. Starting in the 1930s, microbial indicators of fecal contamination (particularly coliform bacteria and their coliphages) were employed as tracers to determine potential migration of pathogens in groundwater. Several injection and recovery experiments performed in the 1990s employed indigenous groundwater microorganisms (both cultured and uncultured) that are better able to survive under in situ conditions. Better methods for labeling native bacteria (e.g by stable isotope labeling or inserting genetic markers; such as the ability to cause ice nucleation) are being developed that will not compromise the organisms' viability during the experimental time course.","language":"English","publisher":"Oxford","doi":"10.1016/S0168-6445(97)00026-0","issn":"01686445","usgsCitation":"Harvey, R., 1997, Microorganisms as tracers in groundwater injection and recovery experiments: A review: FEMS Microbiology Reviews, v. 20, no. 3-4, p. 461-472, https://doi.org/10.1016/S0168-6445(97)00026-0.","productDescription":"12 p.","startPage":"461","endPage":"472","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":479976,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/s0168-6445(97)00026-0","text":"Publisher Index Page"},{"id":228056,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206046,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0168-6445(97)00026-0"}],"volume":"20","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a568be4b0c8380cd6d67a","contributors":{"authors":[{"text":"Harvey, R.W. 0000-0002-2791-8503","orcid":"https://orcid.org/0000-0002-2791-8503","contributorId":11757,"corporation":false,"usgs":true,"family":"Harvey","given":"R.W.","affiliations":[],"preferred":false,"id":383762,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70019748,"text":"70019748 - 1997 - Effects of climate change on freshwater ecosystems of the south-eastern United States and the Gulf Coast of Mexico","interactions":[],"lastModifiedDate":"2024-03-27T10:58:45.197072","indexId":"70019748","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","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":"Effects of climate change on freshwater ecosystems of the south-eastern United States and the Gulf Coast of Mexico","docAbstract":"The south-eastern United States and Gulf Coast of Mexico is physiographically diverse, although dominated by a broad coastal plain. Much of the region has a humid, warm temperate climate with little seasonality in precipitation but strong seasonality in runoff owing to high rates of summer evapotranspiration. The climate of southern Florida and eastern Mexico is subtropical with a distinct summer wet season and winter dry season. Regional climate models suggest that climate change resulting from a doubling of the pre-industrial levels of atmospheric CO2 may increase annual air temperatures by 3-4??C. Changes in precipitation are highly uncertain, but the most probable scenario shows higher levels over all but the northern, interior portions of the region, with increases primarily occurring in summer and occurring as more intense or clustered storms. Despite the increases in precipitation, runoff is likely to decline over much of the region owing to increases in evapotranspiration exceeding increases in precipitation. Only in Florida and the Gulf Coast areas of the US and Mexico are precipitation increases likely to exceed evapotranspiration increases, producing an increase in runoff. However, increases in storm intensity and clustering are likely to result in more extreme hydrographs, with larger peaks in flow but lower baseflows and longer periods of drought. The ecological effects of climate change on freshwaters of the region include: (1) a general increase in rates of primary production, organic matter decomposition and nutrient cycling as a result of higher temperatures and longer growing seasons: (2) reduction in habitat for cool water species, particularly fish and macroinvertebrates in Appalachian streams; (3) reduction in water quality and in suitable habitat in summer owing to lower baseflows and intensification of the temperature-dissolved oxygen squeeze in many rivers and reservoirs; (4) reduction in organic matter storage and loss of organisms during more intense flushing events in some streams and wetlands; (5) shorter periods of inundation of riparian wetlands and greater drying of wetland soils, particularly in northern and inland areas; (6) expansion of subtropical species northwards, including several non-native nuisance species currently confined to southern Florida; (7) expansion of wetlands in Florida and coastal Mexico, but increase in eutrophication of Florida lakes as a result of greater runoff from urban and agricultural areas; and (8) changes in the flushing rate of estuaries that would alter their salinity regimes, stratification and water quality as well as influence productivity in the Gulf of Mexico. Many of the expected climate change effects will exacerbate current anthropogenic stresses on the region's freshwater systems, including increasing demands for water, increasing waste heat loadings and land use changes that alter the quantity and quality of runoff to streams and reservoirs. Research is needed especially in several critical areas: long-term monitoring of key hydrological, chemical and biological properties (particularly water balances in small, forested catchments and temperature-sensitive species); experimental studies of the effects of warming on organisms and ecosystem processes under realistic conditions (e.g. in situ heating experiments); studies of the effects of natural hydrological variation on biological communities; and assessment of the effects of water management activities on organisms and ecosystem processes, including development and testing of management and restoration strategies designed to counteract changes in climate.
","language":"English","publisher":"Wiley","issn":"08856087","usgsCitation":"Mulholland, P.J., Best, G., Coutant, C., Hornberger, G., Meyer, J., Robinson, P., Stenberg, J., Turner, R., Vera-Herrera, F., and Wetzel, R., 1997, Effects of climate change on freshwater ecosystems of the south-eastern United States and the Gulf Coast of Mexico: Hydrological Processes, v. 11, no. 8, p. 949-970.","productDescription":"22 p.","startPage":"949","endPage":"970","numberOfPages":"22","costCenters":[],"links":[{"id":228174,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a06aee4b0c8380cd51385","contributors":{"authors":[{"text":"Mulholland, P. J.","contributorId":89081,"corporation":false,"usgs":false,"family":"Mulholland","given":"P.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":383784,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Best, G.R.","contributorId":27007,"corporation":false,"usgs":true,"family":"Best","given":"G.R.","email":"","affiliations":[],"preferred":false,"id":383778,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Coutant, C.C.","contributorId":15470,"corporation":false,"usgs":true,"family":"Coutant","given":"C.C.","affiliations":[],"preferred":false,"id":383777,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hornberger, G.M.","contributorId":68463,"corporation":false,"usgs":true,"family":"Hornberger","given":"G.M.","email":"","affiliations":[],"preferred":false,"id":383782,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Meyer, J.L.","contributorId":73316,"corporation":false,"usgs":true,"family":"Meyer","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":383783,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Robinson, P.J.","contributorId":43232,"corporation":false,"usgs":true,"family":"Robinson","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":383780,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Stenberg, J.R.","contributorId":7140,"corporation":false,"usgs":true,"family":"Stenberg","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":383776,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Turner, R.E.","contributorId":39749,"corporation":false,"usgs":false,"family":"Turner","given":"R.E.","email":"","affiliations":[{"id":16756,"text":"Louisiana State University, Baton Rouge, LA","active":true,"usgs":false}],"preferred":false,"id":383779,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Vera-Herrera, F.","contributorId":95762,"corporation":false,"usgs":true,"family":"Vera-Herrera","given":"F.","affiliations":[],"preferred":false,"id":383785,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Wetzel, R.G.","contributorId":60403,"corporation":false,"usgs":true,"family":"Wetzel","given":"R.G.","email":"","affiliations":[],"preferred":false,"id":383781,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}} ,{"id":70019749,"text":"70019749 - 1997 - Assessment of climate change and freshwater ecosystems of the Rocky Mountains, USA and Canada","interactions":[],"lastModifiedDate":"2024-03-26T23:14:08.080506","indexId":"70019749","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","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":"Assessment of climate change and freshwater ecosystems of the Rocky Mountains, USA and Canada","docAbstract":"The Rocky Mountains in the USA and Canada encompass the interior cordillera of western North America, from the southern Yukon to northern New Mexico. Annual weather patterns are cold in winter and mild in summer. Precipitation has high seasonal and interannual variation and may differ by an order of magnitude between geographically close locales, depending on slope, aspect and local climatic and orographic conditions. The region's hydrology is characterized by the accumulation of winter snow, spring snowmelt and autumnal baseflows. During the 2–3-month ‘spring runoff’ period, rivers frequently discharge > 70% of their annual water budget and have instantaneous discharges 10–100 times mean low flow.
","language":"English","publisher":"Wiley","doi":"10.1002/(SICI)1099-1085(19970630)11:8<903::AID-HYP511>3.0.CO;2-7","issn":"08856087","usgsCitation":"Hauer, F.R., Baron, J., Campbell, K., Fausch, K., Hostetler, S.W., Leavesley, G., Leavitt, P., McKnight, D.M., and Stanford, J.A., 1997, Assessment of climate change and freshwater ecosystems of the Rocky Mountains, USA and Canada: Hydrological Processes, v. 11, no. 8, p. 903-924, https://doi.org/10.1002/(SICI)1099-1085(19970630)11:8<903::AID-HYP511>3.0.CO;2-7.","productDescription":"22 p.","startPage":"903","endPage":"924","numberOfPages":"22","costCenters":[],"links":[{"id":228207,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ee26e4b0c8380cd49bbc","contributors":{"authors":[{"text":"Hauer, F. Richard","contributorId":76892,"corporation":false,"usgs":true,"family":"Hauer","given":"F.","email":"","middleInitial":"Richard","affiliations":[],"preferred":false,"id":383791,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baron, Jill 0000-0002-5902-6251 jill_baron@usgs.gov","orcid":"https://orcid.org/0000-0002-5902-6251","contributorId":194124,"corporation":false,"usgs":true,"family":"Baron","given":"Jill","email":"jill_baron@usgs.gov","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":true,"id":383786,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Campbell, K.","contributorId":63351,"corporation":false,"usgs":false,"family":"Campbell","given":"K.","affiliations":[{"id":47665,"text":"St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN, USA","active":true,"usgs":false}],"preferred":false,"id":383790,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Fausch, K.D. 0000-0001-5825-7560","orcid":"https://orcid.org/0000-0001-5825-7560","contributorId":84097,"corporation":false,"usgs":false,"family":"Fausch","given":"K.D.","affiliations":[],"preferred":false,"id":383793,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hostetler, S. W. 0000-0003-2272-8302","orcid":"https://orcid.org/0000-0003-2272-8302","contributorId":42911,"corporation":false,"usgs":true,"family":"Hostetler","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":383787,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Leavesley, G.H.","contributorId":93895,"corporation":false,"usgs":true,"family":"Leavesley","given":"G.H.","email":"","affiliations":[],"preferred":false,"id":383794,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Leavitt, P.R.","contributorId":55982,"corporation":false,"usgs":true,"family":"Leavitt","given":"P.R.","email":"","affiliations":[],"preferred":false,"id":383788,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"McKnight, Diane M.","contributorId":59773,"corporation":false,"usgs":false,"family":"McKnight","given":"Diane","email":"","middleInitial":"M.","affiliations":[{"id":16833,"text":"INSTAAR, University of Colorado","active":true,"usgs":false}],"preferred":false,"id":383789,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Stanford, J. A.","contributorId":79643,"corporation":false,"usgs":true,"family":"Stanford","given":"J.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":383792,"contributorType":{"id":1,"text":"Authors"},"rank":9}]}} ,{"id":70019785,"text":"70019785 - 1997 - Use of geochemical mass balance modelling to evaluate the role of weathering in determining stream chemistry in five mid-Atlantic watersheds on different lithologies","interactions":[],"lastModifiedDate":"2017-01-19T14:41:13","indexId":"70019785","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","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":"Use of geochemical mass balance modelling to evaluate the role of weathering in determining stream chemistry in five mid-Atlantic watersheds on different lithologies","docAbstract":"The importance of mineral weathering was assessed and compared for five mid-Atlantic watersheds receiving similar atmospheric inputs but underlain by differing bedrock. Annual solute mass balances and volume-weighted mean solute concentrations were calculated for each watershed for each year of record. In addition, primary and secondary mineralogy were determined for each of the watersheds through analysis of soil samples and thin sections using petrographic, scanning electron microscope, electron microprobe and X-ray diffraction techniques. Mineralogical data were also compiled from the literature. These data were input to NETPATH, a geochemical program that calculates the masses of minerals that react with precipitation to produce stream water chemistry. The feasibilities of the weathering scenarios calculated by NETPATH were evaluated based on relative abundances and reactivities of minerals in the watershed. In watersheds underlain by reactive bedrocks, weathering reactions explained the stream base cation loading. In the acid-sensitive watersheds on unreactive bedrock, calculated weathering scenarios were not consistent with the abundance of reactive minerals in the underlying bedrock, and alternative sources of base cations are discussed.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/(SICI)1099-1085(199706)11:7<719::AID-HYP522>3.0.CO;2-2","issn":"08856087","usgsCitation":"O’Brien, A.K., Rice, K.C., Bricker, O.P., Kennedy, M.M., and Anderson, R.T., 1997, Use of geochemical mass balance modelling to evaluate the role of weathering in determining stream chemistry in five mid-Atlantic watersheds on different lithologies: Hydrological Processes, v. 11, no. 7, p. 719-744, https://doi.org/10.1002/(SICI)1099-1085(199706)11:7<719::AID-HYP522>3.0.CO;2-2.","productDescription":"26 p.","startPage":"719","endPage":"744","costCenters":[{"id":614,"text":"Virginia Water Science Center","active":true,"usgs":true}],"links":[{"id":228136,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","volume":"11","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbf17e4b08c986b329957","contributors":{"authors":[{"text":"O’Brien, Anne K.","contributorId":52955,"corporation":false,"usgs":true,"family":"O’Brien","given":"Anne","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":383901,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rice, Karen C. 0000-0002-9356-5443 kcrice@usgs.gov","orcid":"https://orcid.org/0000-0002-9356-5443","contributorId":1998,"corporation":false,"usgs":true,"family":"Rice","given":"Karen","email":"kcrice@usgs.gov","middleInitial":"C.","affiliations":[{"id":614,"text":"Virginia Water Science Center","active":true,"usgs":true}],"preferred":false,"id":383905,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bricker, Owen P.","contributorId":25142,"corporation":false,"usgs":true,"family":"Bricker","given":"Owen","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":383904,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kennedy, Margaret M.","contributorId":178170,"corporation":false,"usgs":true,"family":"Kennedy","given":"Margaret","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":383902,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Anderson, R. Todd","contributorId":178195,"corporation":false,"usgs":true,"family":"Anderson","given":"R.","email":"","middleInitial":"Todd","affiliations":[],"preferred":false,"id":383903,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70019800,"text":"70019800 - 1997 - From the 1988 drought to the 1993 flood: Transport of halogenated organic compounds with the Mississippi river suspended sediment at Thebes, Illinois","interactions":[],"lastModifiedDate":"2020-01-07T09:10:28","indexId":"70019800","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","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":"From the 1988 drought to the 1993 flood: Transport of halogenated organic compounds with the Mississippi river suspended sediment at Thebes, Illinois","docAbstract":"Suspended sediment was isolated from water samples collected from the Mississippi River at Thebes, IL, eight times over a 5-year period from May 1988 through September 1993 in order to evaluate the transport of lipophilic halogenated organic compounds associated with the suspended sediment. Two hydrologic extremes were included-the 1988 drought and the 1993 flood. Halogenated organic compounds included polychlorinated biphenyls (PCBs), hexachlorobenzene, pentachloroanisole, DCPA (dacthal), trifluralin, aldrin, dieldrin, and chlordane components. Sediment transport of most of these organic compounds was substantially higher during the 1993 flood then at other sampling times. The extreme transports during the flood were due to unusually high concentrations of some contaminants on the suspended sediment, low to average concentrations of suspended sediment being transported, and unusually high water discharges.","language":"English","publisher":"ACS","doi":"10.1021/es960513z","issn":"0013936X","usgsCitation":"Rostad, C., 1997, From the 1988 drought to the 1993 flood: Transport of halogenated organic compounds with the Mississippi river suspended sediment at Thebes, Illinois: Environmental Science & Technology, v. 31, no. 5, p. 1308-1312, https://doi.org/10.1021/es960513z.","productDescription":"5 p.","startPage":"1308","endPage":"1312","numberOfPages":"5","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":227728,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205974,"rank":9999,"type":{"id":10,"text":"Digital Object 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C.E.","contributorId":50939,"corporation":false,"usgs":true,"family":"Rostad","given":"C.E.","email":"","affiliations":[],"preferred":false,"id":383955,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70019807,"text":"70019807 - 1997 - Relationships between salt marsh loss and dredged canals in three Louisiana Estuaries","interactions":[],"lastModifiedDate":"2012-03-12T17:19:17","indexId":"70019807","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2220,"text":"Journal of Coastal Research","active":true,"publicationSubtype":{"id":10}},"title":"Relationships between salt marsh loss and dredged canals in three Louisiana Estuaries","docAbstract":"Coastal land loss rates were quantified for 27 salt marshes in three estuaries of the Louisiana Mississippi Deltaic plain: Barataria, Terrebonne and St. Bernard. The sites ranged from 23 ha to 908 ha and the total area of all sites was 6,367 ha. Two methods were used to calculate open water and canal density in each of five years: (1) a Geographic Information System for 1956 and 1978, and, (2) a point grid method for 1974, 1988, and 1990. A General Linear Model explained 79% of the variance (R2 = 0.79; P ??? 0.95) among basins for all years and provided an estimate of the impacts of canals in each basin. The land loss rates, virtually all occurring as wetland to open water conversions, were different in each basin. The 'background' land loss rates from 1956 to 1990 (exclusive of the direct or indirect effects of canals; %/yr; ?? + 1 Std. Dev.) for each basin were estimated to be: Barataria: 0.71 ?? 0.12, Terrebonne 0.47 ?? 0.09, and St. Bernard 0.08 ?? 0.14. Canals were equally and directly correlated with landloss in each basin. There was 2.85 ha of open water formed with each ha of canal dredged (inclusive of the canal area) and an additional 1 ha wetland converted to spoil bank vegetation. Additional losses may occur if loss rates continue for periods longer than the mapping intervals. There are documented causal mechanisms involving wetland hydrologic changes that can explain these wetland losses.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Coastal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"07490208","usgsCitation":"Bass, A., and Turner, R., 1997, Relationships between salt marsh loss and dredged canals in three Louisiana Estuaries: Journal of Coastal Research, v. 13, no. 3, p. 895-903.","startPage":"895","endPage":"903","numberOfPages":"9","costCenters":[],"links":[{"id":227848,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505aa650e4b0c8380cd84db7","contributors":{"authors":[{"text":"Bass, A.S.","contributorId":82078,"corporation":false,"usgs":true,"family":"Bass","given":"A.S.","email":"","affiliations":[],"preferred":false,"id":383971,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Turner, R.E.","contributorId":39749,"corporation":false,"usgs":false,"family":"Turner","given":"R.E.","email":"","affiliations":[{"id":16756,"text":"Louisiana State University, Baton Rouge, LA","active":true,"usgs":false}],"preferred":false,"id":383970,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70019810,"text":"70019810 - 1997 - Herbicides and their metabolites in rainfall: Origin, transport, and deposition patterns across the midwestern and northeastern United States, 1990-1991","interactions":[],"lastModifiedDate":"2019-02-04T10:55:43","indexId":"70019810","displayToPublicDate":"1997-01-01T00:00:00","publicationYear":"1997","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":"Herbicides and their metabolites in rainfall: Origin, transport, and deposition patterns across the midwestern and northeastern United States, 1990-1991","docAbstract":"Herbicides were detected in rainfall throughout the midwestern and northeastern United States during late spring and summer of 1990 and 1991. Herbicide concentrations exhibited distinct geographic and seasonal patterns. The highest concentrations occurred in midwestern cornbelt states following herbicide application to cropland. Volume-weighted concentrations of 0.2−0.4 μg/L for atrazine and alachlor were typical in this area during mid-April through mid-July, and weighted concentrations as large as 0.6−0.9 μg/L occurred at several sites. Concentrations of 1−3 μg/L were measured in a few individual samples. Atrazine was detected most often followed by alachlor, deethylatrazine, metolachlor, cyanazine, and deisopropylatrazine. The high ratio (∼0.5) of deethylatrazine to atrazine in rainfall suggests atmospheric degradation of atrazine. Mass deposition of herbicides was greatest in areas where herbicide use was high and decreased with distance from the cornbelt. Estimated deposition rates for both atrazine and alachlor ranged from more than 240 μg m-2 yr-1 for some areas in the midwestern states to less than 10 μg m-2 yr-1 for the New England states. The estimated annual deposition of atrazine on the Great Lakes ranged from about 12 to 63 μg m-2 yr-1. The total amounts of atrazine and alachlor deposited annually in rainfall in the study area represent about 0.6% of the atrazine and 0.4% of the alachlor applied annually to crops in the study area.
Herbicide compounds were prevalent in ground water across Iowa, being detected in 70% of the 106 municipal wells sampled during the summer of 1995. Herbicide degradation products were three of the four most frequently detected compounds for this study. The degradation product alachlor ethanesulfonic acid was the most frequently detected compound (65.1%), followed by atrazine (40.6%), and the degradation products deethylatrazine (34.9%), and cyanazine amide (19.8%). The corn herbicide acetochlor, first registered for widespread use in the United States in March 1994, was detected in a single water sample. No reported herbicide compound concentrations for this study exceeded currem U.S. Environmental Protection Agency's maximum contaminant levels or health advisory levels for drinking water, although the herbicide degradation products examined have yet to have such levels established.
\nThe occurrence of herbicide compounds had a significant, inverse relation to well depth and a significant, positive relation to dissolved-oxygen concentration. It is felt that both well depth and dissolved oxygen are acting as rough surrogates to ground-water age, with younger ground water being more likely to contain herbicide compounds. The occurrence of herbicide compounds was substantially different among the major aquifer types across Iowa, being detected in 82.5% of the alluvial, 81.8% of the bedrock/ karst region, 40.0% of the glacial-drift, and 25.0% of the bedrock/nonkarst region aquifers. The observed distribution was partially attributed to variations in general ground-water age among these aquifer types. A significant, inverse relation was determined between total herbicide compound concentrations in ground water and the average soil slope within a 2-km radius of sampled wells. Steeper soil slopes may increase the likelihood of surface runoff occurring rather than ground-water infiltration–decreasing the transport of herbicide compounds to ground water. As expected, a significant positive relation was determined between intensity of herbicide use and herbicide concentrations in ground water.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.1997.tb00134.x","issn":"0017467X","usgsCitation":"Kolpin, D., Kalkhoff, S., Goolsby, D.A., Sneck-Fahrer, D.A., and Thurman, E., 1997, Occurrence of selected herbicides and herbicide degradation products in Iowa's Ground Water, 1995: Ground Water, v. 35, no. 4, p. 679-688, https://doi.org/10.1111/j.1745-6584.1997.tb00134.x.","productDescription":"10 p.","startPage":"679","endPage":"688","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":351,"text":"Iowa Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":228060,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United 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