{"pageNumber":"253","pageRowStart":"6300","pageSize":"25","recordCount":16446,"records":[{"id":70029706,"text":"70029706 - 2007 - Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70029706","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USA","docAbstract":"Stable isotope (??D and ??18O) signatures of three principal groundwater recharge areas in the 21,000-km2 upper Klamath Basin are used to infer recharge sources for aquifers in the interior parts of the basin. Two of the principal recharge areas, the Cascade Range on the western and southern margin of the basin and uplands along the eastern margin, are defined by mean annual precipitation that exceeds approximately 60 cm. A third recharge area coincides with the extensive irrigation canal system in the south central part of the basin. The stable isotope signature for Cascade Range groundwater falls near the global meteoric water line (GMWL). The stable isotope signature for the groundwater of the eastern basin uplands also falls near the GMWL, but is depleted in heavy isotopes relative to the Cascade Range groundwater. The stable isotope signature for water from the irrigation canal system deviates from the GMWL in a manner indicative of fractionation by evaporation. Groundwater provenance was previously unknown for two aquifers of interest: that supplying deep (225-792 m), large-capacity irrigation wells along the Oregon-California border, and that of the geothermal system near Klamath Falls. Groundwater produced by the deep irrigation wells along the Oregon-California border appears to be a mixture of eastern-basin groundwater and water with an evaporative isotopic signature. The component with an evaporative isotopic signature appears in some places to consist of infiltrated irrigation water. Chloride data suggest that much of the component with the evaporative isotopic signature may be coming from an adjacent subbasin. After accounting for the 18O shift common in geothermal waters, isotope data suggest that the geothermal groundwater in the upper Klamath Basin may emanate from the eastern basin uplands. Findings demonstrate that stable isotope and chloride data can illuminate certain details of a regional groundwater flow system in a complex geologic setting where other hydrologic data are ambiguous. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2006.12.008","issn":"00221694","usgsCitation":"Palmer, P., Gannett, M.W., and Hinkle, S., 2007, Isotopic characterization of three groundwater recharge sources and inferences for selected aquifers in the upper Klamath Basin of Oregon and California, USA: Journal of Hydrology, v. 336, no. 1-2, p. 17-29, https://doi.org/10.1016/j.jhydrol.2006.12.008.","startPage":"17","endPage":"29","numberOfPages":"13","costCenters":[],"links":[{"id":212943,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2006.12.008"},{"id":240512,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"336","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3f9be4b0c8380cd64661","contributors":{"authors":[{"text":"Palmer, P.C.","contributorId":86972,"corporation":false,"usgs":true,"family":"Palmer","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":423937,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gannett, M. W.","contributorId":75569,"corporation":false,"usgs":true,"family":"Gannett","given":"M.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":423936,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hinkle, S.R.","contributorId":74778,"corporation":false,"usgs":true,"family":"Hinkle","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":423935,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029730,"text":"70029730 - 2007 - Phosphorus budgets in Everglades wetland ecosystems: The effects of hydrology and nutrient enrichment","interactions":[],"lastModifiedDate":"2012-03-12T17:21:06","indexId":"70029730","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3751,"text":"Wetlands Ecology and Management","active":true,"publicationSubtype":{"id":10}},"title":"Phosphorus budgets in Everglades wetland ecosystems: The effects of hydrology and nutrient enrichment","docAbstract":"The Florida Everglades is a naturally oligotrophic hydroscape that has experienced large changes in ecosystem structure and function as the result of increased anthropogenic phosphorus (P) loading and hydrologic changes. We present whole-ecosystem models of P cycling for Everglades wetlands with differing hydrology and P enrichment with the goal of synthesizing existing information into ecosystem P budgets. Budgets were developed for deeper water oligotrophic wet prairie/slough ('Slough'), shallower water oligotrophic Cladium jamaicense ('Cladium'), partially enriched C. jamaicense/Typha spp. mixture ('Cladium/Typha'), and enriched Typha spp. ('Typha') marshes. The majority of ecosystem P was stored in the soil in all four ecosystem types, with the flocculent detrital organic matter (floc) layer at the bottom of the water column storing the next largest proportion of ecosystem P pools. However, most P cycling involved ecosystem components in the water column (periphyton, floc, and consumers) in deeper water, oligotrophic Slough marsh. Fluxes of P associated with macrophytes were more important in the shallower water, oligotrophic Cladium marsh. The two oligotrophic ecosystem types had similar total ecosystem P stocks and cycling rates, and low rates of P cycling associated with soils. Phosphorus flux rates cannot be estimated for ecosystem components residing in the water column in Cladium/Typha or Typha marshes due to insufficient data. Enrichment caused a large increase in the importance of macrophytes to P cycling in Everglades wetlands. The flux of P from soil to the water column, via roots to live aboveground tissues to macrophyte detritus, increased from 0.03 and 0.2 g P m-2 yr-1 in oligotrophic Slough and Cladium marsh, respectively, to 1.1 g P m-2 yr -1 in partially enriched Cladium/Typha, and 1.6 g P m-2 yr-1 in enriched Typha marsh. This macrophyte translocation P flux represents a large source of internal eutrophication to surface waters in P-enriched areas of the Everglades. ?? 2007 Springer Science+Business Media, Inc.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Wetlands Ecology and Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11273-006-9023-5","issn":"09234861","usgsCitation":"Noe, G., and Childers, D., 2007, Phosphorus budgets in Everglades wetland ecosystems: The effects of hydrology and nutrient enrichment: Wetlands Ecology and Management, v. 15, no. 3, p. 189-205, https://doi.org/10.1007/s11273-006-9023-5.","startPage":"189","endPage":"205","numberOfPages":"17","costCenters":[],"links":[{"id":212800,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11273-006-9023-5"},{"id":240342,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-01-16","publicationStatus":"PW","scienceBaseUri":"505a78b4e4b0c8380cd7876a","contributors":{"authors":[{"text":"Noe, G.B.","contributorId":66464,"corporation":false,"usgs":true,"family":"Noe","given":"G.B.","email":"","affiliations":[],"preferred":false,"id":424039,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Childers, D.L.","contributorId":44334,"corporation":false,"usgs":true,"family":"Childers","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":424038,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029731,"text":"70029731 - 2007 - Bedrock aquifers and population growth in the Denver Basin, Colorado, USA","interactions":[],"lastModifiedDate":"2018-04-10T11:05:50","indexId":"70029731","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1582,"text":"Episodes","active":true,"publicationSubtype":{"id":10}},"title":"Bedrock aquifers and population growth in the Denver Basin, Colorado, USA","docAbstract":"The Denver Basin bedrock aquifer system consists of Tertiary and Cretaceous age sedimentary rocks known as the Dawson, Denver, Arapahoe and Laramie-Fox Hills aquifers. The number of bedrock wells has increased from 12,000 in 1985 to over 33,700 in 2001 and the withdrawal of groundwater has caused water level declines in excess of 75 meters. Water level declines now range from 3 to 12 meters per year in the critical Arapahoe Aquifer. The groundwater supplies were once thought to be sufficient for 100 years but there is concern that they may be depleted in 10 to 15 years in areas on the west side of the basin. Groundwater is being mined from the aquifer system because the withdrawal through wells exceeds the rate of recharge. Increased groundwater withdrawal will cause further water level declines, increased costs to pump groundwater, and reduced yield from existing wells. In the Denver Basin, hydrologists have some capability to monitor declines in water levels for the Arapaho Aquifer, but generally have a limited ability to monitor water use. More complete and accurate water use data are needed to predict groundwater longevity for the Arapahoe Aquifer. The life of the Arapahoe Aquifer can be extended with artificial recharge using imported surface water, water reuse, restrictions on lawn watering, well permit restrictions and other conservation measures. Availability of groundwater may limit growth in the Denver Basin over the next 20 years unless residents are willing to pay for additional new sources of supply.","language":"English","publisher":"International Union of Geological Sciences","issn":"07053797","usgsCitation":"Moore, J., Raynolds, R., and Dechesne, M., 2007, Bedrock aquifers and population growth in the Denver Basin, Colorado, USA: Episodes, v. 30, no. 2, p. 115-118.","productDescription":"4 p.","startPage":"115","endPage":"118","numberOfPages":"4","costCenters":[],"links":[{"id":240343,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":265825,"type":{"id":15,"text":"Index Page"},"url":"https://www.episodes.org/journalArchive.do"}],"volume":"30","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f048e4b0c8380cd4a6bf","contributors":{"authors":[{"text":"Moore, J.E.","contributorId":34927,"corporation":false,"usgs":true,"family":"Moore","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":424040,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Raynolds, R.G.","contributorId":39006,"corporation":false,"usgs":true,"family":"Raynolds","given":"R.G.","email":"","affiliations":[],"preferred":false,"id":424041,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Dechesne, M.","contributorId":72207,"corporation":false,"usgs":true,"family":"Dechesne","given":"M.","affiliations":[],"preferred":false,"id":424042,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029792,"text":"70029792 - 2007 - Origin of halite brine in the Onondaga Trough near Syracuse, New York State, USA: Modeling geochemistry and variable-density flow","interactions":[],"lastModifiedDate":"2018-10-17T11:35:25","indexId":"70029792","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":"Origin of halite brine in the Onondaga Trough near Syracuse, New York State, USA: Modeling geochemistry and variable-density flow","docAbstract":"<p>Halite brine (saturation ranging from 45 to 80%) lies within glacial sediments that fill the Onondaga Trough, a bedrock valley deepened by Pleistocene glaciation near Syracuse, New York State, USA. The most concentrated brine occupies the northern end of the trough, about 10 km downgradient of the northern limit of halite beds in the Silurian Salina Group, the assumed source of salt. The chemical composition of the brine and its radiocarbon age suggest that the brine originally formed about 16,700 years ago through dissolution of halite by glacial melt water and later mixed with saline bedrock water. Two hypotheses regarding the formation of the brine pool were tested through variable-density flow simulations using SEAWAT. Simulation results supported the first hypothesis that the brine pool was derived from a source in the glacial sediments and then migrated to its current position, where it has persisted for over 16,000 years. A second hypothesis that the brine pool formed through steady accumulation of brine from upward flow of a source in the underlying bedrock was not supported by simulation results, because the simulated age distribution was much younger than the age estimated from geochemical modeling.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrogeology Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Springer-Verlag","doi":"10.1007/s10040-007-0186-9","issn":"14312174","usgsCitation":"Yager, R.M., Kappel, W.M., and Plummer, N., 2007, Origin of halite brine in the Onondaga Trough near Syracuse, New York State, USA: Modeling geochemistry and variable-density flow: Hydrogeology Journal, v. 15, no. 7, p. 1321-1339, https://doi.org/10.1007/s10040-007-0186-9.","productDescription":"19 p.","startPage":"1321","endPage":"1339","numberOfPages":"19","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477062,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://zenodo.org/record/1232767","text":"External Repository"},{"id":240677,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":213088,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10040-007-0186-9"}],"country":"United States","state":"New York","city":"Syracuse","otherGeospatial":"Onondaga Trough","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -76.33333333333333,42.75 ], [ -76.33333333333333,43.166666666666664 ], [ -76.08333333333333,43.166666666666664 ], [ -76.08333333333333,42.75 ], [ -76.33333333333333,42.75 ] ] ] } } ] }","volume":"15","issue":"7","noUsgsAuthors":false,"publicationDate":"2007-05-24","publicationStatus":"PW","scienceBaseUri":"505a70d7e4b0c8380cd762a8","contributors":{"authors":[{"text":"Yager, Richard M. 0000-0001-7725-1148 ryager@usgs.gov","orcid":"https://orcid.org/0000-0001-7725-1148","contributorId":950,"corporation":false,"usgs":true,"family":"Yager","given":"Richard","email":"ryager@usgs.gov","middleInitial":"M.","affiliations":[{"id":614,"text":"Virginia Water Science Center","active":true,"usgs":true},{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":424357,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kappel, William M. 0000-0002-2382-9757 wkappel@usgs.gov","orcid":"https://orcid.org/0000-0002-2382-9757","contributorId":1074,"corporation":false,"usgs":true,"family":"Kappel","given":"William","email":"wkappel@usgs.gov","middleInitial":"M.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":424358,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Plummer, Niel 0000-0002-4020-1013 nplummer@usgs.gov","orcid":"https://orcid.org/0000-0002-4020-1013","contributorId":190100,"corporation":false,"usgs":true,"family":"Plummer","given":"Niel","email":"nplummer@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":424359,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029795,"text":"70029795 - 2007 - Altered stream-flow regimes and invasive plant species: The Tamarix case","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029795","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1839,"text":"Global Ecology and Biogeography","active":true,"publicationSubtype":{"id":10}},"title":"Altered stream-flow regimes and invasive plant species: The Tamarix case","docAbstract":"Aim: To test the hypothesis that anthropogenic alteration of stream-flow regimes is a key driver of compositional shifts from native to introduced riparian plant species. Location: The arid south-western United States; 24 river reaches in the Gila and Lower Colorado drainage basins of Arizona. Methods: We compared the abundance of three dominant woody riparian taxa (native Populus fremontii and Salix gooddingii, and introduced Tamarix) between river reaches that varied in stream-flow permanence (perennial vs. intermittent), presence or absence of an upstream flow-regulating dam, and presence or absence of municipal effluent as a stream water source. Results: Populus and Salix were the dominant pioneer trees along the reaches with perennial flow and a natural flood regime. In contrast, Tamarix had high abundance (patch area and basal area) along reaches with intermittent stream flows (caused by natural and cultural factors), as well as those with dam-regulated flows. Main conclusions: Stream-flow regimes are strong determinants of riparian vegetation structure, and hydrological alterations can drive dominance shifts to introduced species that have an adaptive suite of traits. Deep alluvial groundwater on intermittent rivers favours the deep-rooted, stress-adapted Tamarix over the shallower-rooted and more competitive Populus and Salix. On flow-regulated rivers, shifts in flood timing favour the reproductively opportunistic Tamarix over Populus and Salix, both of which have narrow germination windows. The prevailing hydrological conditions thus favour a new dominant pioneer species in the riparian corridors of the American Southwest. These results reaffirm the importance of reinstating stream-flow regimes (inclusive of groundwater flows) for re-establishing the native pioneer trees as the dominant forest type. ?? 2007 The Authors Journal compilation ?? 2007 Blackwell Publishing Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Global Ecology and Biogeography","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1466-8238.2007.00297.x","issn":"1466822X","usgsCitation":"Stromberg, J., Lite, S., Marler, R., Paradzick, C., Shafroth, P., Shorrock, D., White, J.M., and White, M., 2007, Altered stream-flow regimes and invasive plant species: The Tamarix case: Global Ecology and Biogeography, v. 16, no. 3, p. 381-393, https://doi.org/10.1111/j.1466-8238.2007.00297.x.","startPage":"381","endPage":"393","numberOfPages":"13","costCenters":[],"links":[{"id":212653,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1466-8238.2007.00297.x"},{"id":240173,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-01-18","publicationStatus":"PW","scienceBaseUri":"5059e97be4b0c8380cd482ec","contributors":{"authors":[{"text":"Stromberg, J.C.","contributorId":81455,"corporation":false,"usgs":true,"family":"Stromberg","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":424376,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lite, S.J.","contributorId":35535,"corporation":false,"usgs":true,"family":"Lite","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":424372,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marler, R.","contributorId":13440,"corporation":false,"usgs":true,"family":"Marler","given":"R.","email":"","affiliations":[],"preferred":false,"id":424369,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Paradzick, C.","contributorId":17426,"corporation":false,"usgs":true,"family":"Paradzick","given":"C.","affiliations":[],"preferred":false,"id":424371,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Shafroth, P.B.","contributorId":65041,"corporation":false,"usgs":true,"family":"Shafroth","given":"P.B.","email":"","affiliations":[],"preferred":false,"id":424375,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shorrock, D.","contributorId":58465,"corporation":false,"usgs":true,"family":"Shorrock","given":"D.","email":"","affiliations":[],"preferred":false,"id":424374,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"White, J. M.","contributorId":40268,"corporation":false,"usgs":true,"family":"White","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":424373,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"White, M.S.","contributorId":14199,"corporation":false,"usgs":true,"family":"White","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":424370,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70029836,"text":"70029836 - 2007 - Increased groundwater to stream discharge from permafrost thawing in the Yukon River basin: Potential impacts on lateral export of carbon and nitrogen","interactions":[],"lastModifiedDate":"2018-10-17T10:06:39","indexId":"70029836","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Increased groundwater to stream discharge from permafrost thawing in the Yukon River basin: Potential impacts on lateral export of carbon and nitrogen","docAbstract":"Arctic and subarctic watersheds are undergoing climate warming, permafrost thawing, and thermokarst formation resulting in quantitative shifts in surface water - groundwater interaction at the basin scale. Groundwater currently comprises almost one fourth of Yukon River water discharged to the Bering Sea and contributes 5-10% of the dissolved organic carbon (DOC) and nitrogen (DON) and 35-45% of the dissolved inorganic carbon (DIC) and nitrogen (DIN) loads. Long-term strearnflow records (>30 yrs) of the Yukon River basin indicate a general upward trend in groundwater contribution to streamflow of 0.7-0.9%/yr and no pervasive change in annual flow. We propose that the increases in groundwater contributions were caused predominately by climate warming and permafrost thawing that enhances infiltration and supports deeper flowpaths. The increased groundwater fraction may result in decreased DOC and DON and increased DIC and DIN export when annual flow remains unchanged.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Research Letters","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1029/2007GL030216","issn":"00948276","usgsCitation":"Walvoord, M.A., and Striegl, R.G., 2007, Increased groundwater to stream discharge from permafrost thawing in the Yukon River basin: Potential impacts on lateral export of carbon and nitrogen: Geophysical Research Letters, v. 34, no. 12, https://doi.org/10.1029/2007GL030216.","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":477214,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2007gl030216","text":"Publisher Index Page"},{"id":240313,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":212775,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1029/2007GL030216"}],"volume":"34","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-06-28","publicationStatus":"PW","scienceBaseUri":"505a39f9e4b0c8380cd61ae1","contributors":{"authors":[{"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":424536,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Striegl, Robert G. 0000-0002-8251-4659 rstriegl@usgs.gov","orcid":"https://orcid.org/0000-0002-8251-4659","contributorId":1630,"corporation":false,"usgs":true,"family":"Striegl","given":"Robert","email":"rstriegl@usgs.gov","middleInitial":"G.","affiliations":[{"id":36183,"text":"Hydro-Ecological Interactions Branch","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":200,"text":"Coop Res Unit Seattle","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":424535,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70029837,"text":"70029837 - 2007 - Geoelectrical evidence of bicontinuum transport in groundwater","interactions":[],"lastModifiedDate":"2019-10-18T06:43:32","indexId":"70029837","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1807,"text":"Geophysical Research Letters","active":true,"publicationSubtype":{"id":10}},"title":"Geoelectrical evidence of bicontinuum transport in groundwater","docAbstract":"<p>Bicontinuum models and rate-limited mass transfer (RLMT) explain complex transport behavior (e.g., long tailing and rebound) in heterogeneous geologic media, but experimental verification is problematic because geochemical samples represent the mobile component of the pore space. Here, we present geophysical evidence of RLMT at the field scale during an aquifer-storage and recovery experiment in a fractured limestone aquifer in Charleston, South Carolina. We observe a hysteretic relation between measurements of porefluid conductivity and bulk electrical conductivity; this hysteresis contradicts advective-dispersive transport and the standard petrophysical model relating pore-fluid and bulk conductivity, but can be explained by considering bicontinuum transport models that include first-order RLMT. Using a simple numerical model, we demonstrate that geoelectrical measurements are sensitive to bicontinuum transport and RLMT parameters, which are otherwise difficult to infer from direct, hydrologic measurements.</p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2007GL030019","issn":"00948276","usgsCitation":"Singha, K., Day-Lewis, F.D., and Lane, J.W., 2007, Geoelectrical evidence of bicontinuum transport in groundwater: Geophysical Research Letters, v. 34, no. 12, L12401, 5 p., https://doi.org/10.1029/2007GL030019.","productDescription":"L12401, 5 p.","costCenters":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240314,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"South Carolina","city":"Charleston","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -80.29632568359375,\n              32.54681317351514\n            ],\n            [\n              -79.5794677734375,\n              32.54681317351514\n            ],\n            [\n              -79.5794677734375,\n              33.13065128220441\n            ],\n            [\n              -80.29632568359375,\n              33.13065128220441\n            ],\n            [\n              -80.29632568359375,\n              32.54681317351514\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"34","issue":"12","noUsgsAuthors":false,"publicationDate":"2007-06-23","publicationStatus":"PW","scienceBaseUri":"505a1744e4b0c8380cd5545f","contributors":{"authors":[{"text":"Singha, K.","contributorId":51431,"corporation":false,"usgs":true,"family":"Singha","given":"K.","affiliations":[],"preferred":false,"id":424539,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Day-Lewis, Frederick D. 0000-0003-3526-886X daylewis@usgs.gov","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":1672,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"Frederick","email":"daylewis@usgs.gov","middleInitial":"D.","affiliations":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":true,"id":424538,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lane, John W. Jr. 0000-0002-3558-243X jwlane@usgs.gov","orcid":"https://orcid.org/0000-0002-3558-243X","contributorId":189168,"corporation":false,"usgs":true,"family":"Lane","given":"John","suffix":"Jr.","email":"jwlane@usgs.gov","middleInitial":"W.","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"preferred":false,"id":424537,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029838,"text":"70029838 - 2007 - Determining metal assimilation efficiency in aquatic invertebrates using enriched stable metal isotope tracers","interactions":[],"lastModifiedDate":"2023-08-03T11:54:24.514896","indexId":"70029838","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":"Determining metal assimilation efficiency in aquatic invertebrates using enriched stable metal isotope tracers","docAbstract":"<p><span>We employ a novel approach that combines pulse-chase feeding and multi-labelled stable isotopes to determine gut passage time (GPT), gut retention time (GRT), food ingestion rate (IR) and assimilation efficiency (AE) of three trace elements for a freshwater gastropod. Lettuce isotopically enriched in&nbsp;</span><sup>53</sup><span>Cr,&nbsp;</span><sup>65</sup><span>Cu and&nbsp;</span><sup>106</sup><span>Cd was fed for 2</span><span>&nbsp;</span><span>h to&nbsp;</span><i>Lymnaea stagnalis</i><span>. The release of tracers in feces and water was monitored for 48</span><span>&nbsp;</span><span>h, during which unlabelled lettuce was provided&nbsp;</span><i>ad libidum</i><span>. The first defecation of&nbsp;</span><sup>53</sup><span>Cr occurred after 5</span><span>&nbsp;</span><span>h of depuration (GPT), whereas 90% of the ingested&nbsp;</span><sup>53</sup><span>Cr was recovered in the feces after 22.5</span><span>&nbsp;</span><span>h of depuration (GRT).&nbsp;</span><sup>53</sup><span>Chromium was not significantly accumulated in the soft tissues upon exposure. In contrast,&nbsp;</span><sup>65</sup><span>Cu and&nbsp;</span><sup>106</sup><span>Cd assimilation was detectable for most experimental snails, i.e.,&nbsp;</span><sup>65/63</sup><span>Cu and&nbsp;</span><sup>106/114</sup><span>Cd ratios in exposed snails were higher than those for controls. Food IR during the labelled feeding phase was 0.16</span><span>&nbsp;</span><span>±</span><span>&nbsp;</span><span>0.07</span><span>&nbsp;</span><span>g</span><span>&nbsp;</span><span>g</span><sup>−1</sup><span>&nbsp;</span><span>d</span><sup>−1</sup><span>. IR was inferred from the amount of&nbsp;</span><sup>53</sup><span>Cr egested in the feces during depuration and the concentration of&nbsp;</span><sup>53</sup><span>Cr in the labelled lettuce. Assimilation efficiencies (±95% CI) determined using mass balance calculations were 84</span><span>&nbsp;</span><span>±</span><span>&nbsp;</span><span>4% for Cu and 85</span><span>&nbsp;</span><span>±</span><span>&nbsp;</span><span>3% for Cd. The ratio method yields similar AE estimates. Expanding the application of this novel stable isotope tracer technique to other metals in a wide variety of species will provide unique opportunities to evaluate the interplay between digestive processes and dietary influx of metals. Understanding the biological processes that modulate dietborne metal uptake is crucial to assess the toxicity of dietborne metals.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/j.aquatox.2007.03.016","issn":"0166445X","usgsCitation":"Croteau, M.N., Luoma, S.N., and Pellet, B., 2007, Determining metal assimilation efficiency in aquatic invertebrates using enriched stable metal isotope tracers: Aquatic Toxicology, v. 83, no. 2, p. 116-125, https://doi.org/10.1016/j.aquatox.2007.03.016.","productDescription":"10 p.","startPage":"116","endPage":"125","numberOfPages":"10","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240315,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"83","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fff0e4b0c8380cd4f4b2","contributors":{"authors":[{"text":"Croteau, Marie Noele 0000-0003-0346-3580 mcroteau@usgs.gov","orcid":"https://orcid.org/0000-0003-0346-3580","contributorId":895,"corporation":false,"usgs":true,"family":"Croteau","given":"Marie","email":"mcroteau@usgs.gov","middleInitial":"Noele","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":424540,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Luoma, Samuel N. 0000-0001-5443-5091 snluoma@usgs.gov","orcid":"https://orcid.org/0000-0001-5443-5091","contributorId":2287,"corporation":false,"usgs":true,"family":"Luoma","given":"Samuel","email":"snluoma@usgs.gov","middleInitial":"N.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":424541,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pellet, B.","contributorId":99377,"corporation":false,"usgs":true,"family":"Pellet","given":"B.","email":"","affiliations":[],"preferred":false,"id":424542,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029868,"text":"70029868 - 2007 - Field-derived relationships for flow velocity and resistance in high-gradient streams","interactions":[],"lastModifiedDate":"2012-03-12T17:21:08","indexId":"70029868","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2342,"text":"Journal of Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Field-derived relationships for flow velocity and resistance in high-gradient streams","docAbstract":"We measured velocity and channel geometry in 10 reaches (bed gradient = 0.08-0.21) of a predominantly step-pool channel, the Rio Cordon, Italy, over a range of discharges (3-80% of the bankfull discharge). The resulting data were used to compute flow resistance. At-a-station hydraulic geometry relations indicate that in most reaches, the exponent describing the rate of velocity increases with discharge was between 0.48 and 0.6, which is within the range of published values for pool-riffle channels. The Rio Cordon data are also combined with published hydraulics data from step-pool streams to explore non-dimensional relationships between velocity and flow resistance and factors including unit discharge, channel gradient, and step geometry. Multiple regression analysis of this combined field dataset indicated that dimensionless unit discharge (q*) is the most important independent variable overall in explaining variations in velocity and flow resistance, followed by channel slope and the ratio of step height to step length. Empirical equations are provided both for dimensionless velocity and flow resistance, but prediction of the former variable appears more reliable. ?? 2007 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jhydrol.2007.03.021","issn":"00221694","usgsCitation":"Comiti, F., Mao, L., Wilcox, A., Wohl, E., and Lenzi, M., 2007, Field-derived relationships for flow velocity and resistance in high-gradient streams: Journal of Hydrology, v. 340, no. 1-2, p. 48-62, https://doi.org/10.1016/j.jhydrol.2007.03.021.","startPage":"48","endPage":"62","numberOfPages":"15","costCenters":[],"links":[{"id":212745,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jhydrol.2007.03.021"},{"id":240281,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"340","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0feee4b0c8380cd53a86","contributors":{"authors":[{"text":"Comiti, F.","contributorId":82130,"corporation":false,"usgs":true,"family":"Comiti","given":"F.","email":"","affiliations":[],"preferred":false,"id":424658,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mao, L.","contributorId":64894,"corporation":false,"usgs":true,"family":"Mao","given":"L.","email":"","affiliations":[],"preferred":false,"id":424657,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilcox, A.","contributorId":62834,"corporation":false,"usgs":true,"family":"Wilcox","given":"A.","email":"","affiliations":[],"preferred":false,"id":424655,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wohl, E.E. 0000-0001-7435-5013","orcid":"https://orcid.org/0000-0001-7435-5013","contributorId":28753,"corporation":false,"usgs":true,"family":"Wohl","given":"E.E.","affiliations":[],"preferred":false,"id":424654,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lenzi, M.A.","contributorId":63622,"corporation":false,"usgs":true,"family":"Lenzi","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":424656,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"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":80482,"text":"ofr20071282 - 2007 - Simulation of flow and habitat conditions under ice, Cache la Poudre River - January 2006","interactions":[],"lastModifiedDate":"2016-05-27T13:37:32","indexId":"ofr20071282","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1282","title":"Simulation of flow and habitat conditions under ice, Cache la Poudre River - January 2006","docAbstract":"<p>The U.S. Forest Service authorizes the occupancy and use of Forest Service lands by various projects, including water storage facilities, under the Federal Land Policy and Management Act. Federal Land Policy and Management Act permits can be renewed at the end of their term. The U.S. Forest Service analyzes the environmental effects for the initial issuance or renewal of a permit and the terms and conditions (for example, mitigations plans) contained in the permit for the facilities. The U.S. Forest Service is preparing an environmental impact statement (EIS) to determine the conditions for the occupancy and use for Long Draw Reservoir on National Forest System administered lands. The scope of the EIS includes evaluating current operations and effects to fish habitat of an ongoing winter release of 0.283 m3 /s (10 ft3 /s) from headwater reservoirs as part of a previously issued permit. The field conditions observed during this study included this release.</p>\n<p>The U.S. Forest Service entered into an interagency agreement (05-IA-11021000-030) with the U.S. Geological Survey (USGS) Fort Collins Science Center to perform analysis of fish habitat and flow relationships in the Cache la Poudre River during winter ice-over conditions using a twodimensional hydrodynamic model. The U.S. Forest Service selected the Fort Collins Science Center for this task because of their expertise in developing two-dimensional hydraulic models for habitat modeling applications. This report transmits model results to the U.S. Forest Service to analyze the effects of alternative flow scenarios at a site on the mainstem Cache la Poudre River in Larimer County, Colorado, near Kinikinik (40&deg; 42' 44.16\" N. lat, 105&deg; 44' 30.70\" W. log), as shown in figure 1. It will be used in pending environmental analyses and decisions for the occupancy and use of the Arapaho-Roosevelt National Forest by water storage facilities.</p>\n<p>The water management scenarios of interest in this study are related to releasing water from Chambers and Barnes Meadows Reservoirs, based on the assumption that winter flow augmentation can increase potential fish habitat. Figure 2 shows the relationship between Chambers, Barnes Meadows, and Long Draw Reservoirs. At the time this study was proposed, existing flow simulation results showed that the channel constraints imposed by existing artificial low-head dikes would have little or no effect on the hydrodynamics of the river at the low flow levels that were to be evaluated. The Kinikinik study site contains deep pools, riffles, and runs. This diversity of habitat types made it ideal for assessing the effects of altered flow on fish habitat under ice in the main stem Cache la Poudre River. Thus, the Kinikinik site was selected for this study of winter habitat conditions.</p>\n<p>The preexisting topographic and hydrologic data collected at this site enabled data collection efforts for this study to focus on describing streamflow and ice cover during the winter months. A two-dimensional hydrodynamic model, River2D (Steffler and Blackburn, 2002), was used to simulate flow conditions under the ice cover that was observed January 24, 2006.</p>\n<p>The objectives of this study are (1) to describe the extent and thickness of ice cover, (2) simulate depth and velocity under ice at the study site for observed and reduced flows, and (3) to quantify fish habitat in this portion of the mainstem Cache la Poudre River for the current winter release schedule as well as for similar conditions without the 0.283 m<sup>3</sup>/s winter release.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071282","usgsCitation":"Waddle, T., 2007, Simulation of flow and habitat conditions under ice, Cache la Poudre River - January 2006: U.S. Geological Survey Open-File Report 2007-1282, v, 37 p., https://doi.org/10.3133/ofr20071282.","productDescription":"v, 37 p.","numberOfPages":"42","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":195516,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071282.PNG"},{"id":320217,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1282/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Colorado","otherGeospatial":"Cache la Poudre River","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -105.90202331542969,\n              40.52267294048898\n            ],\n            [\n              -105.90202331542969,\n              40.71863980562837\n            ],\n            [\n              -105.42411804199219,\n              40.71863980562837\n            ],\n            [\n              -105.42411804199219,\n              40.52267294048898\n            ],\n            [\n              -105.90202331542969,\n              40.52267294048898\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49f8e4b07f02db5f2f39","contributors":{"authors":[{"text":"Waddle, Terry","contributorId":47848,"corporation":false,"usgs":true,"family":"Waddle","given":"Terry","affiliations":[],"preferred":false,"id":292704,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"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":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":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true},{"id":662,"text":"Western Mineral and Environmental Resources 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":70030888,"text":"70030888 - 2007 - Spatial and temporal variations in silver contamination and toxicity in San Francisco Bay","interactions":[],"lastModifiedDate":"2018-10-11T18:50:04","indexId":"70030888","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1561,"text":"Environmental Research","active":true,"publicationSubtype":{"id":10}},"title":"Spatial and temporal variations in silver contamination and toxicity in San Francisco Bay","docAbstract":"<p>Although San Francisco Bay has a \"Golden Gate\", it may be argued that it is the \"Silver Estuary\". For at one time the Bay was reported to have the highest levels of silver in its sediments and biota, along with the only accurately measured values of silver in solution, of any estuarine system. Since then others have argued that silver contamination is higher elsewhere (e.g., New York Bight, Florida Bay, Galveston Bay) in a peculiar form of pollution machismo, while silver contamination has measurably declined in sediments, biota, and surface waters of the Bay over the past two to three decades. Documentation of those systemic temporal declines has been possible because of long-term, ongoing monitoring programs, using rigorous trace metal clean sampling and analytical techniques, of the United States Geological Survey and San Francisco Bay Regional Monitoring Program that are summarized in this report. However, recent toxicity studies with macro-invertebrates in the Bay have indicated that silver may still be adversely affecting the health of the estuarine system, and other studies have indicated that silver concentrations in the Bay may be increasing due to new industrial inputs and/or the diagenetic remobilization of silver from historically contaminated sediments being re-exposed to overlying surface waters and benthos. Consequently, the Bay may not be ready to relinquish its title as the \"Silver Estuary\".</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.envres.2007.05.006","issn":"00139351","usgsCitation":"Flegal, A., Brown, C.L., Squire, S., Ross, J., Scelfo, G., and Hibdon, S., 2007, Spatial and temporal variations in silver contamination and toxicity in San Francisco Bay: Environmental Research, v. 105, no. 1, p. 34-52, https://doi.org/10.1016/j.envres.2007.05.006.","productDescription":"19 p.","startPage":"34","endPage":"52","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":239033,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211693,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.envres.2007.05.006"}],"country":"United States","state":"California","otherGeospatial":"San Francisco Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -122.64862060546875,\n              37.391981943533544\n            ],\n            [\n              -121.74362182617188,\n              37.391981943533544\n            ],\n            [\n              -121.74362182617188,\n              38.238180119798635\n            ],\n            [\n              -122.64862060546875,\n              38.238180119798635\n            ],\n            [\n              -122.64862060546875,\n              37.391981943533544\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"105","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b945ae4b08c986b31aa18","contributors":{"authors":[{"text":"Flegal, A.R.","contributorId":64607,"corporation":false,"usgs":true,"family":"Flegal","given":"A.R.","email":"","affiliations":[],"preferred":false,"id":429095,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brown, Cynthia L. clbrown@usgs.gov","contributorId":206,"corporation":false,"usgs":true,"family":"Brown","given":"Cynthia","email":"clbrown@usgs.gov","middleInitial":"L.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":429093,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Squire, S.","contributorId":79289,"corporation":false,"usgs":true,"family":"Squire","given":"S.","email":"","affiliations":[],"preferred":false,"id":429097,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ross, J.R.M.","contributorId":75756,"corporation":false,"usgs":true,"family":"Ross","given":"J.R.M.","email":"","affiliations":[],"preferred":false,"id":429096,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Scelfo, G.M.","contributorId":24993,"corporation":false,"usgs":true,"family":"Scelfo","given":"G.M.","email":"","affiliations":[],"preferred":false,"id":429092,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hibdon, S.","contributorId":45113,"corporation":false,"usgs":true,"family":"Hibdon","given":"S.","email":"","affiliations":[],"preferred":false,"id":429094,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030784,"text":"70030784 - 2007 - Dams, floodplain land use, and riparian forest conservation in the semiarid Upper Colorado River Basin, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:03","indexId":"70030784","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1547,"text":"Environmental Management","active":true,"publicationSubtype":{"id":10}},"title":"Dams, floodplain land use, and riparian forest conservation in the semiarid Upper Colorado River Basin, USA","docAbstract":"Land and water resource development can independently eliminate riparian plant communities, including Fremont cottonwood forest (CF), a major contributor to ecosystem structure and functioning in semiarid portions of the American Southwest. We tested whether floodplain development was linked to river regulation in the Upper Colorado River Basin (UCRB) by relating the extent of five developed land-cover categories as well as CF and other natural vegetation to catchment reservoir capacity, changes in total annual and annual peak discharge, and overall level of mainstem hydrologic alteration (small, moderate, or large) in 26 fourth-order subbasins. We also asked whether CF appeared to be in jeopardy at a regional level. We classified 51% of the 57,000 ha of alluvial floodplain examined along >2600 km of mainstem rivers as CF and 36% as developed. The proportion developed was unrelated to the level of mainstem hydrologic alteration. The proportion classified as CF was also independent of the level of hydrologic alteration, a result we attribute to confounding effects from development, the presence of time lags, and contrasting effects from flow alteration in different subbasins. Most CF (68% by area) had a sparse canopy (???5% cover), and stands with >50% canopy cover occupied <1% of the floodplain in 15 subbasins. We suggest that CF extent in the UCRB will decline markedly in the future, when the old trees on floodplains now disconnected from the river die and large areas change from CF to non-CF categories. Attention at a basinwide scale to the multiple factors affecting cottonwood patch dynamics is needed to assure conservation of these riparian forests. ?? 2007 Springer Science+Business Media, LLC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Management","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s00267-006-0294-7","issn":"0364152X","usgsCitation":"Andersen, D., Cooper, D., and Northcott, K., 2007, Dams, floodplain land use, and riparian forest conservation in the semiarid Upper Colorado River Basin, USA: Environmental Management, v. 40, no. 3, p. 453-475, https://doi.org/10.1007/s00267-006-0294-7.","startPage":"453","endPage":"475","numberOfPages":"23","costCenters":[],"links":[{"id":211685,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s00267-006-0294-7"},{"id":239025,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-06-06","publicationStatus":"PW","scienceBaseUri":"5059fd61e4b0c8380cd4e7e5","contributors":{"authors":[{"text":"Andersen, D.C.","contributorId":19119,"corporation":false,"usgs":true,"family":"Andersen","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":428658,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cooper, D.J.","contributorId":89489,"corporation":false,"usgs":true,"family":"Cooper","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":428659,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Northcott, K.","contributorId":89717,"corporation":false,"usgs":true,"family":"Northcott","given":"K.","email":"","affiliations":[],"preferred":false,"id":428660,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029831,"text":"70029831 - 2007 - Role of hydrous iron oxide formation in attenuation and diel cycling of dissolved trace metals in a stream affected by acid rock drainage","interactions":[],"lastModifiedDate":"2018-10-17T13:19:06","indexId":"70029831","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Role of hydrous iron oxide formation in attenuation and diel cycling of dissolved trace metals in a stream affected by acid rock drainage","docAbstract":"<p>Mining-impacted streams have been shown to undergo diel (24-h) fluctuations in concentrations of major and trace elements. Fisher Creek in south-central Montana, USA receives acid rock drainage (ARD) from natural and mining-related sources. A previous diel field study found substantial changes in dissolved metal concentrations at three sites with differing pH regimes during a 24-h period in August 2002. The current work discusses follow-up field sampling of Fisher Creek as well as field and laboratory experiments that examine in greater detail the underlying processes involved in the observed diel concentration changes. The field experiments employed in-stream chambers that were either transparent or opaque to light, filled with stream water and sediment (cobbles coated with hydrous Fe and Al oxides), and placed in the stream to maintain the same temperature. Three sets of laboratory experiments were performed: (1) equilibration of a Cu(II) and Zn(II) containing solution with Fisher Creek stream sediment at pH 6.9 and different temperatures; (2) titration of Fisher Creek water from pH 3.1 to 7 under four different isothermal conditions; and (3) analysis of the effects of temperature on the interaction of an Fe(II) containing solution with Fisher Creek stream sediment under non-oxidizing conditions. Results of these studies are consistent with a model in which Cu, Fe(II), and to a lesser extent Zn, are adsorbed or co-precipitated with hydrous Fe and Al oxides as the pH of Fisher Creek increases from 5.3 to 7.0. The extent of metal attenuation is strongly temperature-dependent, being more pronounced in warm vs. cold water. Furthermore, the sorption/co-precipitation process is shown to be irreversible; once the Cu, Zn, and Fe(II) are removed from solution in warm water, a decrease in temperature does not release the metals back to the water column.</p>","language":"English","publisher":"Springer","doi":"10.1007/s11270-006-9297-5","usgsCitation":"Parker, S.R., Gammons, C.H., Jones, C.A., and Nimick, D.A., 2007, Role of hydrous iron oxide formation in attenuation and diel cycling of dissolved trace metals in a stream affected by acid rock drainage: Water, Air, & Soil Pollution, v. 181, no. 1-4, p. 247-263, https://doi.org/10.1007/s11270-006-9297-5.","productDescription":"17 p.","startPage":"247","endPage":"263","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":240209,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Montana","otherGeospatial":"Fisher Creek","volume":"181","issue":"1-4","noUsgsAuthors":false,"publicationDate":"2006-12-08","publicationStatus":"PW","scienceBaseUri":"505aae55e4b0c8380cd87090","contributors":{"authors":[{"text":"Parker, Stephen R.","contributorId":140802,"corporation":false,"usgs":false,"family":"Parker","given":"Stephen","email":"","middleInitial":"R.","affiliations":[{"id":13574,"text":"Montana Tech of the University of Montana, Butte, MT","active":true,"usgs":false}],"preferred":false,"id":424517,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gammons, Chris","contributorId":140801,"corporation":false,"usgs":false,"family":"Gammons","given":"Chris","affiliations":[{"id":13574,"text":"Montana Tech of the University of Montana, Butte, MT","active":true,"usgs":false}],"preferred":false,"id":424516,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jones, Clain A.","contributorId":69917,"corporation":false,"usgs":false,"family":"Jones","given":"Clain","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424518,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"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":424519,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70030196,"text":"70030196 - 2007 - Groundwater noble gas, age, and temperature signatures in an Alpine watershed: Valuable tools in conceptual model development","interactions":[],"lastModifiedDate":"2018-04-03T13:21:21","indexId":"70030196","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":"Groundwater noble gas, age, and temperature signatures in an Alpine watershed: Valuable tools in conceptual model development","docAbstract":"<p><span>Bedrock groundwater in alpine watersheds is poorly understood, mainly because of a scarcity of wells in alpine settings. Groundwater noble gas, age, and temperature data were collected from springs and wells with depths of 3–342 m in Handcart Gulch, an alpine watershed in Colorado. Temperature profiles indicate active groundwater circulation to a maximum depth (aquifer thickness) of about 200 m, or about 150 m below the water table. Dissolved noble gas data show unusually high excess air concentrations (&gt;0.02 cm</span><sup>3</sup><span><span>&nbsp;</span>STP/g, ΔNe &gt; 170%) in the bedrock, consistent with unusually large seasonal water table fluctuations (up to 50 m) observed in the upper part of the watershed. Apparent<span>&nbsp;</span></span><sup>3</sup><span>H/</span><sup>3</sup><span>He ages are positively correlated with sample depth and excess air concentrations. Integrated samples were collected from artesian bedrock wells near the trunk stream and are assumed to approximate flow‐weighted samples reflecting bedrock aquifer mean residence times. Exponential mean ages for these integrated samples are remarkably consistent along the stream, four of five being from 8 to 11 years. The tracer data in combination with other hydrologic and geologic data support a relatively simple conceptual model of groundwater flow in the watershed in which (1) permeability is primarily a function of depth; (2) water table fluctuations increase with distance from the stream; and (3) recharge, aquifer thickness, and porosity are relatively uniform throughout the watershed in spite of the geological complexity of the Proterozoic crystalline rocks that underlie it.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2006WR005349","usgsCitation":"Manning, A.H., and Caine, J.S., 2007, Groundwater noble gas, age, and temperature signatures in an Alpine watershed: Valuable tools in conceptual model development: Water Resources Research, v. 43, no. 4, Article W04404; 16 p., https://doi.org/10.1029/2006WR005349.","productDescription":"Article W04404; 16 p.","costCenters":[],"links":[{"id":477130,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2006wr005349","text":"Publisher Index Page"},{"id":239611,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"43","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-04-04","publicationStatus":"PW","scienceBaseUri":"505a2dabe4b0c8380cd5bf9a","contributors":{"authors":[{"text":"Manning, Andrew H. 0000-0002-6404-1237 amanning@usgs.gov","orcid":"https://orcid.org/0000-0002-6404-1237","contributorId":1305,"corporation":false,"usgs":true,"family":"Manning","given":"Andrew","email":"amanning@usgs.gov","middleInitial":"H.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":426091,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Caine, Jonathan S. 0000-0002-7269-6989 jscaine@usgs.gov","orcid":"https://orcid.org/0000-0002-7269-6989","contributorId":1272,"corporation":false,"usgs":true,"family":"Caine","given":"Jonathan","email":"jscaine@usgs.gov","middleInitial":"S.","affiliations":[{"id":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true}],"preferred":false,"id":426092,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"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":211,"text":"Crustal Geophysics and Geochemistry Science Center","active":true,"usgs":true},{"id":171,"text":"Central Mineral and Environmental Resources 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":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true},{"id":662,"text":"Western Mineral and Environmental Resources 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":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":438,"text":"National Research Program - Western Branch","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central 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":70030984,"text":"70030984 - 2007 - Monitoring engineered remediation with borehole radar","interactions":[],"lastModifiedDate":"2019-10-17T09:54:03","indexId":"70030984","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3568,"text":"The Leading Edge","active":true,"publicationSubtype":{"id":10}},"title":"Monitoring engineered remediation with borehole radar","docAbstract":"<p>The success of engineered remediation is predicated on correct emplacement of either amendments (e.g., vegetable-oil emulsion, lactate, molasses, etc.) or permeable reactive barriers (e.g., vegetable oil, zero-valent iron, etc.) to enhance microbial or geochemical breakdown of contaminants and treat contaminants. Currently, site managers have limited tools to provide information about the distribution of injected materials; the existence of gaps or holes in barriers; and breakdown or transformation of injected materials over time.</p>","language":"English","publisher":"Society of Exploration Geophysicists","doi":"10.1190/1.2769561","issn":"1070485X","usgsCitation":"Lane, J.W., Day-Lewis, F.D., and Joesten, P.K., 2007, Monitoring engineered remediation with borehole radar: The Leading Edge, v. 26, no. 8, p. 1032-1035, https://doi.org/10.1190/1.2769561.","productDescription":"4 p.","startPage":"1032","endPage":"1035","numberOfPages":"4","costCenters":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238969,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5da3e4b0c8380cd704d4","contributors":{"authors":[{"text":"Lane, John W. Jr. 0000-0002-3558-243X jwlane@usgs.gov","orcid":"https://orcid.org/0000-0002-3558-243X","contributorId":189168,"corporation":false,"usgs":true,"family":"Lane","given":"John","suffix":"Jr.","email":"jwlane@usgs.gov","middleInitial":"W.","affiliations":[{"id":493,"text":"Office of Ground Water","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":false,"id":429503,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Day-Lewis, Frederick D. 0000-0003-3526-886X daylewis@usgs.gov","orcid":"https://orcid.org/0000-0003-3526-886X","contributorId":1672,"corporation":false,"usgs":true,"family":"Day-Lewis","given":"Frederick","email":"daylewis@usgs.gov","middleInitial":"D.","affiliations":[{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true},{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":493,"text":"Office of Ground Water","active":true,"usgs":true}],"preferred":true,"id":429501,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Joesten, Peter K. pjoesten@usgs.gov","contributorId":1929,"corporation":false,"usgs":true,"family":"Joesten","given":"Peter","email":"pjoesten@usgs.gov","middleInitial":"K.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true},{"id":486,"text":"OGW Branch of Geophysics","active":true,"usgs":true}],"preferred":true,"id":429502,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"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":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}]}}
,{"id":80158,"text":"ofr20071052 - 2007 - Road impacts on the Baca National Wildlife Refuge, Colorado, with emphasis on effects to surface- and shallow ground-water hydrology - A literature review","interactions":[],"lastModifiedDate":"2017-12-19T19:26:10","indexId":"ofr20071052","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1052","title":"Road impacts on the Baca National Wildlife Refuge, Colorado, with emphasis on effects to surface- and shallow ground-water hydrology - A literature review","docAbstract":"<p>A review of published research on unpaved road effects on surface-water and shallow ground-water hydrology was undertaken to assist the Baca National Wildlife Refuge, Colorado, in understanding factors potentially influencing refuge ecology. Few studies were found that addressed hydrological effects of roads on a comparable area of shallow slope in a semiarid region. No study dealt with road effects on surface- and ground-water supplies to ephemeral wetlands, which on the refuge are sustained by seasonal snowmelt in neighboring mountains. Road surfaces increase runoff, reduce infiltration, and serve as a sediment source. Roadbeds can interfere with normal surface- and ground-water flows and thereby influence the quantity, timing, and duration of water movement both across landscapes and through the soil. Hydrologic effects can be localized near the road as well as widespread and distant. The number, arrangement, and effectiveness of road-drainage structures (culverts and other devices) largely determine the level of hydrologic alteration produced by a road. Undesirable changes to natural hydrologic patterns can be minimized by considering potential impacts during road design, construction, and maintenance. Road removal as a means to restore desirable hydrologic conditions to landscapes adversely affected by roads has yet to be rigorously evaluated.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071052","collaboration":"Prepared in cooperation with the U.S. Fish and Wildlife Service","usgsCitation":"Andersen, D., 2007, Road impacts on the Baca National Wildlife Refuge, Colorado, with emphasis on effects to surface- and shallow ground-water hydrology - A literature review: U.S. Geological Survey Open-File Report 2007-1052, v, 26 p., https://doi.org/10.3133/ofr20071052.","productDescription":"v, 26 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":192460,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071052.PNG"},{"id":320218,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1052/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Colorado","otherGeospatial":"Baca National Wildlife Refuge","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b28e4b07f02db6b1614","contributors":{"authors":[{"text":"Andersen, Douglas C. doug_andersen@usgs.gov","contributorId":2216,"corporation":false,"usgs":true,"family":"Andersen","given":"Douglas C.","email":"doug_andersen@usgs.gov","affiliations":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"preferred":false,"id":291874,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70030083,"text":"70030083 - 2007 - Paleoenvironmental assessment of recent environmental changes in Florida Bay, USA: a biomarker based study","interactions":[],"lastModifiedDate":"2014-10-09T10:58:19","indexId":"70030083","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","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":"Paleoenvironmental assessment of recent environmental changes in Florida Bay, USA: a biomarker based study","docAbstract":"The extractable lipid compositions in four Florida Bay cores were determined in order to understand environmental changes over the last 160 years. The most significant environmental change was recorded by oscillations in the amplitude and frequency of biomarkers during the 20th century. Two seagrass molecular proxies (Paq and the C<sub>25</sub>/C<sub>27</sub>n-alkan-2-one ratio) reached a maximum post 1900, suggesting that abundant seagrass communities existed during the 20th century. A sharp drop in the Paq value from 0.65 to 0.48 in the central Bay at about 1987 seems to reflect seagrass die-off. The concentrations of microbial biomarkers (C<sub>20</sub> HBIs, C<sub>25</sub> HBIs and dinosterol) substantially increased after 1950 in the TC, BA and NB cores, reflecting an increase in algal (planktonic organism) primary productivity. However, the RB core presented the highest abundance of C<sub>25</sub> HBIs and dinosterol during the period of 1880–1940, suggesting historically large inputs from diatoms and dinoflagellates. A substantial rise in abundance of taraxerol (a specific biomarker of mangroves) from 20 μg/g TOC in the 1830s to 279 μg/g TOC in the l980s is likely a result of increased mangrove primary productivity along the shore of the NE Bay. These changes are most likely the result of hydrological alterations in South Florida.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Estuarine, Coastal and Shelf Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.ecss.2007.01.002","issn":"02727714","usgsCitation":"Xu, Y., Holmes, C.W., and Jaffe, R., 2007, Paleoenvironmental assessment of recent environmental changes in Florida Bay, USA: a biomarker based study: Estuarine, Coastal and Shelf Science, v. 73, no. 1-2, p. 201-210, https://doi.org/10.1016/j.ecss.2007.01.002.","productDescription":"10 p.","startPage":"201","endPage":"210","numberOfPages":"10","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":212935,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.ecss.2007.01.002"},{"id":240503,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","otherGeospatial":"Florida Bay","volume":"73","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a73e1e4b0c8380cd772d8","contributors":{"authors":[{"text":"Xu, Y.","contributorId":47816,"corporation":false,"usgs":true,"family":"Xu","given":"Y.","email":"","affiliations":[],"preferred":false,"id":425639,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Holmes, C. W.","contributorId":36076,"corporation":false,"usgs":true,"family":"Holmes","given":"C.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":425638,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jaffe, R.","contributorId":34887,"corporation":false,"usgs":true,"family":"Jaffe","given":"R.","email":"","affiliations":[],"preferred":false,"id":425637,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}