{"pageNumber":"391","pageRowStart":"9750","pageSize":"25","recordCount":16506,"records":[{"id":70020832,"text":"70020832 - 1998 - Tracing hydrologic pathways using chloride at the Panola mountain research watershed, Georgia, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:19:37","indexId":"70020832","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Tracing hydrologic pathways using chloride at the Panola mountain research watershed, Georgia, USA","docAbstract":"An analysis of chloride (Cl-) concentrations and fluxes at the 41 ha Panola Mountain Research Watershed indicates that Cl- may be used effectively to differentiate 'new' and 'old' water flow through the hillslope and their respective contributions to streamwater. Rainfall and throughfall, the 'new' water inputs, are marked by low Cl- concentrations (<15 ??eq L-1). Stormwater moves rapidly to depth along preferred pathways in a deciduous forest hillslope, as evidenced by low Cl- concentrations (<20 ??eq L-1) in mobile soil water from zero-tension stainless-steel pan lysimeters. 'Old' waters, matrix soil waters and groundwater, typically have high Cl- concentrations (>30 ??eq L-1). Timing of soil water transport is not sufficiently rapid to suggest that soil water from this hillslope site (20 m from the stream) contributes to streamwater during individual rainstorms. The source of streamflow, therefore, must be a combination of channel interception, overland flow and soil water from nearchannel areas, and run off from a 3 ha bedrock outcrop in the headwaters Groundwater contribution to streamflow was estimated using Cl- concentrations of throughfall and groundwater as the two end members for a two-component hydrograph separation. For the study period, groundwater contributed 79% of the streamflow and from 1985 to 1995, contributed 75% of the streamflow. Rainfall was the source of 45% of the Cl- flux from the watershed in the long term; the remaining Cl- is hypothesized to be derived from dry deposition, consistent with the enrichment noted for throughfall. At peak flow during individual rainstorms, 'new' water can contribute 95% of the runoff.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Water, Air, and Soil Pollution","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Kluwer Academic Publishers","publisherLocation":"Dordrecht, Netherlands","doi":"10.1023/A:1005082332332","issn":"00496979","usgsCitation":"Peters, N., and Ratcliffe, E., 1998, Tracing hydrologic pathways using chloride at the Panola mountain research watershed, Georgia, USA: Water, Air, & Soil Pollution, v. 105, no. 1-2, p. 263-275, https://doi.org/10.1023/A:1005082332332.","startPage":"263","endPage":"275","numberOfPages":"13","costCenters":[],"links":[{"id":229758,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206438,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1023/A:1005082332332"}],"volume":"105","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb694e4b08c986b326d59","contributors":{"authors":[{"text":"Peters, N.E.","contributorId":33332,"corporation":false,"usgs":true,"family":"Peters","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":387689,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ratcliffe, E.B.","contributorId":33857,"corporation":false,"usgs":true,"family":"Ratcliffe","given":"E.B.","email":"","affiliations":[],"preferred":false,"id":387690,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020838,"text":"70020838 - 1998 - Strain IMB-1, a novel bacterium for the removal of methyl bromide in fumigated agricultural soils","interactions":[],"lastModifiedDate":"2023-01-12T20:43:36.481289","indexId":"70020838","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":850,"text":"Applied and Environmental Microbiology","active":true,"publicationSubtype":{"id":10}},"title":"Strain IMB-1, a novel bacterium for the removal of methyl bromide in fumigated agricultural soils","docAbstract":"<p><span>A facultatively methylotrophic bacterium, strain IMB-1, that has been isolated from agricultural soil grows on methyl bromide (MeBr), methyl iodide, methyl chloride, and methylated amines, as well as on glucose, pyruvate, or acetate. Phylogenetic analysis of its 16S rRNA gene sequence indicates that strain IMB-1 classes in the alpha subgroup of the class&nbsp;</span><i>Proteobacteria</i><span>&nbsp;and is closely related to members of the genus&nbsp;</span><i>Rhizobium</i><span>. The ability of strain IMB-1 to oxidize MeBr to CO</span><sub>2</sub><span>&nbsp;is constitutive in cells regardless of the growth substrate. Addition of cell suspensions of strain IMB-1 to soils greatly accelerates the oxidation of MeBr, as does pretreatment of soils with low concentrations of methyl iodide. These results suggest that soil treatment strategies can be devised whereby bacteria can effectively consume MeBr during field fumigations, which would diminish or eliminate the outward flux of MeBr to the atmosphere.</span></p>","language":"English","publisher":"American Society for Microbiology","doi":"10.1128/AEM.64.8.2899-2905.1998","issn":"00992240","usgsCitation":"Connell, H.T., Costello, A., Lidstrom, M., and Oremland, R., 1998, Strain IMB-1, a novel bacterium for the removal of methyl bromide in fumigated agricultural soils: Applied and Environmental Microbiology, v. 64, no. 8, p. 2899-2905, https://doi.org/10.1128/AEM.64.8.2899-2905.1998.","productDescription":"7 p.","startPage":"2899","endPage":"2905","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":479733,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1128/aem.64.8.2899-2905.1998","text":"Publisher Index Page"},{"id":229835,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"64","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b988ee4b08c986b31c093","contributors":{"authors":[{"text":"Connell, Hancock T.L.","contributorId":9418,"corporation":false,"usgs":true,"family":"Connell","given":"Hancock","email":"","middleInitial":"T.L.","affiliations":[],"preferred":false,"id":387712,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Costello, A.M.","contributorId":49951,"corporation":false,"usgs":true,"family":"Costello","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":387713,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lidstrom, M.E.","contributorId":93207,"corporation":false,"usgs":true,"family":"Lidstrom","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":387714,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Oremland, R.S.","contributorId":97512,"corporation":false,"usgs":true,"family":"Oremland","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":387715,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70020840,"text":"70020840 - 1998 - Impact of the 1993 flood on the distribution of organic contaminants in bed sediments of the Upper Mississippi River","interactions":[],"lastModifiedDate":"2019-02-04T08:01:23","indexId":"70020840","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Impact of the 1993 flood on the distribution of organic contaminants in bed sediments of the Upper Mississippi River","docAbstract":"The 1500 km Upper Mississippi River (UMR) consists of 29 navigation pools and can be divided into the upper reach (pools 1-4), the middle reach (pools 5-13), and the lower reach (pools 14-26). Comparison of composite bed sediment samples collected from the downstream third of 24 pools before and after the 1993 UMR flood provides fieldscale data on the effect of the flood on sediment organic compound distributions. The sediments were analyzed for organic carbon, coprostanol, polynuclear aromatic hydrocarbons including pyrene, linear alkylbenzene-sulfonates, polychlorinated biphenyls (PCBs), and organochlorine pesticides. Most of the target compounds were detected in all of the sediment samples, although concentrations were generally <1 mg/kg. The highest concentrations typically occurred in the upper reach, an urbanized area on a relatively small river. Pool 4 (Lake Pepin) is an efficient sediment trap, and concentrations of the compounds below pool 4 were substantially lower than those in pools 2-4. Differences in concentrations before and after the 1993 flood also were greatest in the upper reach. In pools 1-4, concentrations of pyrene and PCBs decreased after the flood whereas coprostanol increased. These results suggest that bed sediments stored in the pools were diluted or buried by sediments with different organic compound compositions washed in from urban and agricultural portions of the watershed.The 1500 km Upper Mississippi River (UMR) consists of 29 navigation pools and can be divided into the upper reach (pools 1-4), the middle reach (pools 5-13), and the lower reach (pools 14-26). Comparison of composite bed sediment samples collected from the downstream third of 24 pools before and after the 1993 UMR flood provides field-scale data on the effect of the flood on sediment organic compound distributions. The sediments were analyzed for organic carbon, coprostanol, polynuclear aromatic hydrocarbons including pyrene, linear alkylbenzene-sulfonates, polychlorinated biphenyls (PCBs), and organochlorine pesticides. Most of the target compounds were detected in all of the sediment samples, although concentrations were generally <1 mg/kg. The highest concentrations typically occurred in the upper reach, an urbanized area on a relatively small river. Pool 4 (Lake Pepin) is an efficient sediment trap, and concentrations of the compounds below pool 4 were substantially lower than those in pools 2-4. Differences in concentrations before and after the 1993 flood also were greatest in the upper reach. In pools 1-4, concentrations of pyrene and PCBs decreased after the flood whereas coprostanol increased. These results suggest that bed sediments stored in the pools were diluted or buried by sediments with different organic compound compositions washed in from urban and agricultural portions of the watershed.","largerWorkTitle":"Science and Technology","language":"English","publisher":"ACS","doi":"10.1021/es970795i","issn":"0013936X","usgsCitation":"Barber, L.B., and Writer, J., 1998, Impact of the 1993 flood on the distribution of organic contaminants in bed sediments of the Upper Mississippi River: Environmental Science & Technology, v. 32, no. 14, p. 2077-2083, https://doi.org/10.1021/es970795i.","productDescription":"7 p.","startPage":"2077","endPage":"2083","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":229875,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206468,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es970795i"}],"volume":"32","issue":"14","noUsgsAuthors":false,"publicationDate":"1998-06-11","publicationStatus":"PW","scienceBaseUri":"505a38cce4b0c8380cd616cb","contributors":{"authors":[{"text":"Barber, L. B.","contributorId":64602,"corporation":false,"usgs":true,"family":"Barber","given":"L.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":387718,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Writer, J.H.","contributorId":9780,"corporation":false,"usgs":true,"family":"Writer","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":387717,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020845,"text":"70020845 - 1998 - Application of the top specified boundary layer (TSBL) approximation to initial characterization of an inland aquifer mineralization 1. Direct contact between fresh and saltwater","interactions":[],"lastModifiedDate":"2012-03-12T17:19:52","indexId":"70020845","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Application of the top specified boundary layer (TSBL) approximation to initial characterization of an inland aquifer mineralization 1. Direct contact between fresh and saltwater","docAbstract":"This paper presents a basic study in generalized terms that originates from two needs: (1) to understand the major mechanisms involved in the mineralization of groundwater of the Great Bend Prairie aquifer of Kansas by saltwater originating from a deeper Permian bedrock formation, and (2) to develop simple, robust tools that can readily be used for local assessment and management activities in the salt-affected region. A simplified basic conceptual model is adopted, incorporating two horizontal layers of porous medium which come into contact at a specific location within the model domain. The top layer is saturated with freshwater, and the bottom layer is saturated with saltwater. The paper considers various stages of approximation which can be useful for simplified simulation of the build-up of the transition zone (TZ) between the freshwater and the saltwater. The hierarchy of approximate approaches leads to the development of the top specified boundary layer (TSBL) method, which is the major tool used in this study for initial characterization of the development of the TZ. It is shown that the thickness of the TZ is mainly determined by the characteristic dispersivity. The build-up of the TZ is completed after a time period equal to the time needed to advect a fluid particle along the whole extent of the TZ. Potential applications and the effects of natural recharge and pumpage on salinity transport in the domain are discussed and evaluated in the context of demonstrating the practicality of the TSBL approach.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Contaminant Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0169-7722(98)00056-4","issn":"01697722","usgsCitation":"Rubin, H., and Buddemeier, R., 1998, Application of the top specified boundary layer (TSBL) approximation to initial characterization of an inland aquifer mineralization 1. Direct contact between fresh and saltwater: Journal of Contaminant Hydrology, v. 32, no. 3-4, p. 353-376, https://doi.org/10.1016/S0169-7722(98)00056-4.","startPage":"353","endPage":"376","numberOfPages":"24","costCenters":[],"links":[{"id":206485,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0169-7722(98)00056-4"},{"id":229959,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ecbbe4b0c8380cd49455","contributors":{"authors":[{"text":"Rubin, H.","contributorId":54358,"corporation":false,"usgs":true,"family":"Rubin","given":"H.","email":"","affiliations":[],"preferred":false,"id":387737,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Buddemeier, R. W.","contributorId":86492,"corporation":false,"usgs":true,"family":"Buddemeier","given":"R. W.","affiliations":[],"preferred":false,"id":387738,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020852,"text":"70020852 - 1998 - Analysis of transient storage subject to unsteady flow: Diel flow variation in an Antarctic stream","interactions":[],"lastModifiedDate":"2019-02-04T10:09:14","indexId":"70020852","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2564,"text":"Journal of the North American Benthological Society","onlineIssn":"1937-237X","printIssn":"0887-3593","active":true,"publicationSubtype":{"id":10}},"title":"Analysis of transient storage subject to unsteady flow: Diel flow variation in an Antarctic stream","docAbstract":"<div class=\"hlFld-Abstract\"><div class=\"abstractSection abstractInFull\"><p class=\"first last\">Transport of dissolved material in streams and small rivers may be characterized using tracer-dilution methods and solute transport models. Recent studies have quantified stream/substream interactions using models of transient storage. These studies are based on tracer-dilution data obtained during periods of steady flow. We present a modeling framework for the analysis of transient storage in stream systems with unsteady flows. The framework couples a kinematic wave routing model with a solute transport model that includes transient storage. The routing model provides time-varying flows and cross-sectional areas that are used as input to the solute transport model. The modeling framework was used to quantify stream/substream interaction in Huey Creek, an Antarctic stream fed exclusively by glacial meltwater. Analysis of tracer-dilution data indicates that there was substantial interaction between the flowing surface water and the hyporheic (substream) zone. The ratio of storage zone area to stream cross-sectional area (A&lt;sub&gt;s&lt;/sub&gt;/A) was &gt;1 in all stream reaches, indicating that the substream area contributing to hyporheic exchange was large relative to stream cross-sectional area. The rate of exchange, as governed by the transient storage exchange coefficient (α), was rapid because of a high stream gradient and porous alluvial materials. Estimates of α generally exceed those determined for other small streams. The high degree of hyporheic exchange supports the hypothesis that weathering reactions within the hyporheos account for observed increases in solute concentration with stream length, as noted in other studies of Antarctic streams.</p></div></div>","language":"English","publisher":"University of Chicago Press","doi":"10.2307/1467958","issn":"08873593","usgsCitation":"Runkel, R., McKnight, D.M., and Andrews, E., 1998, Analysis of transient storage subject to unsteady flow: Diel flow variation in an Antarctic stream: Journal of the North American Benthological Society, v. 17, no. 2, p. 143-154, https://doi.org/10.2307/1467958.","productDescription":"12 p.","startPage":"143","endPage":"154","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":230079,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eb44e4b0c8380cd48d11","contributors":{"authors":[{"text":"Runkel, R.L.","contributorId":97529,"corporation":false,"usgs":true,"family":"Runkel","given":"R.L.","affiliations":[],"preferred":false,"id":387770,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKnight, Diane M.","contributorId":59773,"corporation":false,"usgs":false,"family":"McKnight","given":"Diane","email":"","middleInitial":"M.","affiliations":[{"id":16833,"text":"INSTAAR, University of Colorado","active":true,"usgs":false}],"preferred":false,"id":387769,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Andrews, E.D.","contributorId":13922,"corporation":false,"usgs":true,"family":"Andrews","given":"E.D.","email":"","affiliations":[],"preferred":false,"id":387768,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020854,"text":"70020854 - 1998 - Lithological and hydrological influences on ground-water composition in a heterogeneous carbonate-clay aquifer system","interactions":[],"lastModifiedDate":"2023-12-20T12:27:38.346536","indexId":"70020854","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Lithological and hydrological influences on ground-water composition in a heterogeneous carbonate-clay aquifer system","docAbstract":"<div id=\"15009126\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>The influence of clay units on ground-water composition was investigated in a heterogeneous carbonate aquifer system of Miocene age in southwest Florida, known as the Intermediate aquifer system. Regionally, the ground water is recharged inland, flows laterally and to greater depths in the aquifer systems, and is discharged vertically upward at the saltwater interface along the coast. A depth profile of water composition was obtained by sampling ground water from discrete intervals within the permeable carbonate units during coring and by squeezing pore water from a core of the less-permeable clay layers. A normative salt analysis of solute compositions in the water indicated a marine origin for both types of water and an evolutionary pathway for the clay water that involves clay diagenesis. The chemical composition of the ground water in the carbonate bedrock is significantly different from that of the pore water in the clay layers. Dissolution of clays and opaline silica results in high silica concentrations relative to water in other parts of the Intermediate aquifer system. Water enriched in chloride relative to the overlying and underlying ground water recharges the aquifer inland where the confining clay layer is absent, and it dissolves carbonate and silicate minerals and reacts with clays along its flow path, eventually reaching this coastal site and resulting in the high chloride and silica concentrations observed in the middle part of the Intermediate aquifer system. Reaction-path modeling suggests that the recharging surficial water mixes with sulfate-rich water upwelling from the Upper Floridan aquifer, and carbonate mineral dissolution and precipitation, weathering and exchange reactions, clay mineral diagenesis, clay and silica dissolution, organic carbon oxidation, and iron and sulfate reduction result in the observed water compositions.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1998)110<1163:LAHIOG>2.3.CO;2","issn":"00167606","usgsCitation":"Kauffman, S., Herman, J., and Jones, B., 1998, Lithological and hydrological influences on ground-water composition in a heterogeneous carbonate-clay aquifer system: Geological Society of America Bulletin, v. 110, no. 9, p. 1163-1173, https://doi.org/10.1130/0016-7606(1998)110<1163:LAHIOG>2.3.CO;2.","productDescription":"11 p.","startPage":"1163","endPage":"1173","numberOfPages":"11","costCenters":[],"links":[{"id":230117,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"110","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a487ee4b0c8380cd67ee3","contributors":{"authors":[{"text":"Kauffman, S.J.","contributorId":83301,"corporation":false,"usgs":true,"family":"Kauffman","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":387778,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Herman, J.S.","contributorId":73345,"corporation":false,"usgs":true,"family":"Herman","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":387777,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jones, B.F.","contributorId":52156,"corporation":false,"usgs":true,"family":"Jones","given":"B.F.","email":"","affiliations":[],"preferred":false,"id":387776,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020858,"text":"70020858 - 1998 - Estimating ice-affected streamflow by extended Kalman filtering","interactions":[],"lastModifiedDate":"2016-10-06T16:11:55","indexId":"70020858","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2341,"text":"Journal of Hydrologic Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Estimating ice-affected streamflow by extended Kalman filtering","docAbstract":"An extended Kalman filter was developed to automate the real-time estimation of ice-affected streamflow on the basis of routine measurements of stream stage and air temperature and on the relation between stage and streamflow during open-water (ice-free) conditions. The filter accommodates three dynamic modes of ice effects: sudden formation/ablation, stable ice conditions, and eventual elimination. The utility of the filter was evaluated by applying it to historical data from two long-term streamflow-gauging stations, St. John River at Dickey, Maine and Platte River at North Bend, Nebr. Results indicate that the filter was stable and that parameters converged for both stations, producing streamflow estimates that are highly correlated with published values. For the Maine station, logarithms of estimated streamflows are within 8% of the logarithms of published values 87.2% of the time during periods of ice effects and within 15% 96.6% of the time. Similarly, for the Nebraska station, logarithms of estimated streamflows are within 8% of the logarithms of published values 90.7% of the time and within 15% 97.7% of the time. In addition, the correlation between temporal updates and published streamflows on days of direct measurements at the Maine station was 0.777 and 0.998 for ice-affected and open-water periods, respectively; for the Nebraska station, corresponding correlations were 0.864 and 0.997.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrologic Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1061/(ASCE)1084-0699(1998)3:3(174)","issn":"10840699","usgsCitation":"Holtschlag, D., and Grewal, M., 1998, Estimating ice-affected streamflow by extended Kalman filtering: Journal of Hydrologic Engineering, v. 3, no. 3, p. 174-181, https://doi.org/10.1061/(ASCE)1084-0699(1998)3:3(174).","startPage":"174","endPage":"181","numberOfPages":"8","costCenters":[{"id":382,"text":"Michigan Water Science Center","active":true,"usgs":true}],"links":[{"id":230197,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0b23e4b0c8380cd525ba","contributors":{"authors":[{"text":"Holtschlag, D. J. 0000-0001-5185-4928","orcid":"https://orcid.org/0000-0001-5185-4928","contributorId":102493,"corporation":false,"usgs":true,"family":"Holtschlag","given":"D. J.","affiliations":[],"preferred":false,"id":387787,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Grewal, M.S.","contributorId":108274,"corporation":false,"usgs":true,"family":"Grewal","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":387788,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70020861,"text":"70020861 - 1998 - Interaction between stream temperature, streamflow, and groundwater exchanges in alpine streams","interactions":[],"lastModifiedDate":"2019-02-01T06:26:35","indexId":"70020861","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Interaction between stream temperature, streamflow, and groundwater exchanges in alpine streams","docAbstract":"<p><span>Four alpine streams were monitored to continuously collect stream temperature and streamflow for periods ranging from a week to a year. In a small stream in the Colorado Rockies, diurnal variations in both stream temperature and streamflow were significantly greater in losing reaches than in gaining reaches, with minimum streamflow losses occurring early in the day and maximum losses occurring early in the evening. Using measured stream temperature changes, diurnal streambed infiltration rates were predicted to increase as much as 35% during the day (based on a heat and water transport groundwater model), while the measured increase in streamflow loss was 40%. For two large streams in the Sierra Nevada Mountains, annual stream temperature variations ranged from 0° to 25°C. In summer months, diurnal stream temperature variations were 30–40% of annual stream temperature variations, owing to reduced streamflows and increased atmospheric heating. Previous reports document that one Sierra stream site generally gains groundwater during low flows, while the second Sierra stream site may lose water during low flows. For August the diurnal streamflow variation was 11% at the gaining stream site and 30% at the losing stream site. On the basis of measured diurnal stream temperature variations, streambed infiltration rates were predicted to vary diurnally as much as 20% at the losing stream site. Analysis of results suggests that evapotranspiration losses determined diurnal streamflow variations in the gaining reaches, while in the losing reaches, evapotranspiration losses were compounded by diurnal variations in streambed infiltration. Diurnal variations in stream temperature were reduced in the gaining reaches as a result of discharging groundwater of relatively constant temperature. For the Sierra sites, comparison of results with those from a small tributary demonstrated that stream temperature patterns were useful in delineating discharges of bank storage following dam releases. Direct coupling may have occurred between streamflow and stream temperature for losing stream reaches, such that reduced streamflows facilitated increased afternoon stream temperatures and increased afternoon stream temperatures induced increased streambed losses, leading to even greater increases in both stream temperature and streamflow losses.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/98WR00998","usgsCitation":"Constantz, J., 1998, Interaction between stream temperature, streamflow, and groundwater exchanges in alpine streams: Water Resources Research, v. 34, no. 7, p. 1609-1615, https://doi.org/10.1029/98WR00998.","productDescription":"7 p.","startPage":"1609","endPage":"1615","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":230276,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3cace4b0c8380cd62f38","contributors":{"authors":[{"text":"Constantz, James E. 0000-0002-4062-2096 jconstan@usgs.gov","orcid":"https://orcid.org/0000-0002-4062-2096","contributorId":1962,"corporation":false,"usgs":true,"family":"Constantz","given":"James E.","email":"jconstan@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":387797,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70020862,"text":"70020862 - 1998 - Controls on denitrification in riparian soils in headwater catchments of a hardwood forest in the Catskill Mountains, U.S.A.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:51","indexId":"70020862","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3416,"text":"Soil Biology and Biochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Controls on denitrification in riparian soils in headwater catchments of a hardwood forest in the Catskill Mountains, U.S.A.","docAbstract":"Denitrification in riparian soils is thought to be an important factor that reduces hydrologic export of nitrate from forested and agricultural catchments. A 2-y study to identify the soil factors most closely associated with denitrification in riparian soils in headwater catchments within the Catskill Mountains of New York, included field surveys of surface and subsurface denitrification rates, and an amendment experiment to assess the relative effects of increases in available carbon and substrate NO-/3 on denitrification rates. Denitrification rates were measured by acetylene inhibition during incubation of intact soil cores from eight soil types representing a range of drainage classes. Soil cores were analyzed for organic matter, total P, extractable NO-/3-N and NH+/4-N, organic N, pH, moisture, porosity, and water-filled pore space, to determine which of these factors were most closely associated with denitrification. The distribution of denitrification rates found during the field surveys was highly skewed, with many low or zero values and few high values. Denitrification rates were positively associated with high soil organic matter, total P, and water-filled pore space, and were highest in seep (poorly-drained) soils, toeslope (seasonally-drained) soils, and stream-edge (poorly- to moderately well-drained) soils in which these three soil characteristics were typically high. Denitrification rates in these wet locations were also positively associated with soil NH+/4-N concentration and pH, but not with NO-/3-N concentration, suggesting that the rate of NO-/3 supply (via nitrification or hydrologic transport) was more important than the instantaneous concentration of NO-/3-N in the soils. The amendment experiment indicated that denitrification in soil types studied was most responsive to added glucose alone or with NO-/3. Thus, in these soils, a combination of slow rates of NO-/3 supply and low available carbon appears to limit denitrification. Annual denitrification rates in spring-fed soils (0.74 to 1.43 kg N ha-1 y-1) were up to 5 times greater than in other surface soils, yet these soils accounted for only 1.8% of the catchment's N loss through denitrification because they represent less than 3% of the catchment area. Dry upland soils constituted 71% of the catchment area and accounted for 91% of the catchment's N loss through denitrification. Annual denitrification in the catchment equaled about 65% of stream NO-/3-N and NH+/4-N export and 14% of precipitation NO-/3-N and NH+/4-N inputs. Denitrification appears to be important relative to N input and export in these Catskill catchments.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Soil Biology and Biochemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/S0038-0717(98)00012-1","issn":"00380717","usgsCitation":"Ashby, J., Bowden, W., and Murdoch, P., 1998, Controls on denitrification in riparian soils in headwater catchments of a hardwood forest in the Catskill Mountains, U.S.A.: Soil Biology and Biochemistry, v. 30, no. 7, p. 853-864, https://doi.org/10.1016/S0038-0717(98)00012-1.","startPage":"853","endPage":"864","numberOfPages":"12","costCenters":[],"links":[{"id":206576,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0038-0717(98)00012-1"},{"id":230277,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"30","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fbcfe4b0c8380cd4df8e","contributors":{"authors":[{"text":"Ashby, J.A.","contributorId":44693,"corporation":false,"usgs":true,"family":"Ashby","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":387798,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bowden, W.B.","contributorId":83237,"corporation":false,"usgs":true,"family":"Bowden","given":"W.B.","email":"","affiliations":[],"preferred":false,"id":387800,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Murdoch, Peter S.","contributorId":73547,"corporation":false,"usgs":true,"family":"Murdoch","given":"Peter S.","affiliations":[],"preferred":false,"id":387799,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020868,"text":"70020868 - 1998 - Comparative sequence stratigraphy of low-latitude versus high-latitude lacustrine rift basins: Seismic data examples from the East African and Baikal rifts","interactions":[],"lastModifiedDate":"2018-03-05T15:10:36","indexId":"70020868","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Comparative sequence stratigraphy of low-latitude versus high-latitude lacustrine rift basins: Seismic data examples from the East African and Baikal rifts","docAbstract":"Lakes Baikal, Malawi and Tanganyika are the world's three largest rift valley lakes and are the classic modem examples of lacustrine rift basins. All the rift lakes are segmented into half-graben basins, and seismic reflection datasets reveal how this segmentation controls the filling of the rift basins through time. In the early stages of rifting, basins are fed primarily by flexural margin and axial margin drainage systems. At the climax of syn-rift sedimentation, however, when the basins are deeply subsided, almost all the margins are walled off by rift shoulder uplifts, and sediment flux into the basins is concentrated at accommodation zone and axial margin river deltas. Flexural margin unconformities are commonplace in the tropical lakes but less so in high-latitude Lake Baikal. Lake levels are extremely dynamic in the tropical lakes and in low-latitude systems in general because of the predominance of evaporation in the hydrologic cycle in those systems. Evaporation is minimized in relation to inflow in the high-latitude Lake Baikal and in most high-latitude systems, and consequently, major sequence boundaries tend to be tectonically controlled in that type of system. The acoustic stratigraphies of the tropical lakes are dominated by high-frequency and high-amplitude lake level shifts, whereas in high-latitude Lake Baikal, stratigraphic cycles are dominated by tectonism and sediment-supply variations.","largerWorkTitle":"Palaeogeography, Palaeoclimatology, Palaeoecology","language":"English","doi":"10.1016/S0031-0182(98)00022-4","issn":"00310182","usgsCitation":"Scholz, C., Moore, T., Hutchinson, D.R., Golmshtok, A., Klitgord, K.D., and Kurotchkin, A., 1998, Comparative sequence stratigraphy of low-latitude versus high-latitude lacustrine rift basins: Seismic data examples from the East African and Baikal rifts, <i>in</i> Palaeogeography, Palaeoclimatology, Palaeoecology, v. 140, no. 1-4, p. 401-420, https://doi.org/10.1016/S0031-0182(98)00022-4.","startPage":"401","endPage":"420","numberOfPages":"20","costCenters":[],"links":[{"id":487414,"rank":10000,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1016/s0031-0182(98)00022-4","text":"Publisher Index Page"},{"id":229682,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206420,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/S0031-0182(98)00022-4"}],"volume":"140","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f827e4b0c8380cd4ceef","contributors":{"authors":[{"text":"Scholz, C.A.","contributorId":76810,"corporation":false,"usgs":true,"family":"Scholz","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":387823,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moore, T.C. Jr.","contributorId":83692,"corporation":false,"usgs":true,"family":"Moore","given":"T.C.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":387824,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hutchinson, D. R.","contributorId":31770,"corporation":false,"usgs":true,"family":"Hutchinson","given":"D.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":387822,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Golmshtok, A. Ja","contributorId":91268,"corporation":false,"usgs":true,"family":"Golmshtok","given":"A. Ja","affiliations":[],"preferred":false,"id":387826,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Klitgord, Kim D.","contributorId":82307,"corporation":false,"usgs":true,"family":"Klitgord","given":"Kim","email":"","middleInitial":"D.","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":387825,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Kurotchkin, A.G.","contributorId":17394,"corporation":false,"usgs":true,"family":"Kurotchkin","given":"A.G.","email":"","affiliations":[],"preferred":false,"id":387821,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70020870,"text":"70020870 - 1998 - Methyl mercury dynamics in littoral sediments of a temperate seepage lake","interactions":[],"lastModifiedDate":"2019-01-30T10:28:42","indexId":"70020870","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1169,"text":"Canadian Journal of Fisheries and Aquatic Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Methyl mercury dynamics in littoral sediments of a temperate seepage lake","docAbstract":"<p><span>The sites and rates of methyl mercury (MeHg) production and transport in littoral zone sediments were investigated at Pallette Lake in northern Wisconsin. In littoral areas where groundwater inflow occurs, sulfate supply from groundwater creates profiles of electron acceptors (sulfate) and donors (methane, sulfide) that are reversed from those found in sediments whose sulfate supply is delivered from overlying water. The highest MeHg concentrations in porewaters and the maximal advective MeHg flux rates (4.5-61.7 ng ·m</span><sup>-2</sup><span>&nbsp;·day</span><sup>-1</sup><span>) were observed in the spring, while highest bulk phase concentrations occur later in the summer. These estimated MeHg fluxes are greater than the mean areal production rates estimated previously for the water column and are similar to the atmospheric flux. Gross MeHg production was measured using the addition of&nbsp;</span><sup>203</sup><span>Hg as a tracer to sediments. The depth at which maximal&nbsp;</span><sup>203</sup><span>Hg methylation occurred coincided with the observed maximums in solid-phase and porewater MeHg concentrations. Because input, advection, and accumulation of MeHg in these sediments were measured directly, an independent estimate of MeHg production could be made and compared with&nbsp;</span><sup>203</sup><span>Hg-derived rates. This comparison suggests that that the&nbsp;</span><sup>203</sup><span>Hg tracer method provides reasonable estimates of gross methylation rates and that a substantial fraction of solid-phase Hg is available for methylation</span></p>","language":"English","publisher":"CSP","doi":"10.1139/f97-304","issn":"0706652X","usgsCitation":"Krabbenhoft, D., Gilmour, C., Benoit, J., Babiarz, C., Andren, A., and Hurley, J., 1998, Methyl mercury dynamics in littoral sediments of a temperate seepage lake: Canadian Journal of Fisheries and Aquatic Sciences, v. 55, no. 4, p. 835-844, https://doi.org/10.1139/f97-304.","productDescription":"10 p.","startPage":"835","endPage":"844","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":229721,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"55","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5611e4b0c8380cd6d339","contributors":{"authors":[{"text":"Krabbenhoft, D. P. 0000-0003-1964-5020","orcid":"https://orcid.org/0000-0003-1964-5020","contributorId":90765,"corporation":false,"usgs":true,"family":"Krabbenhoft","given":"D. P.","affiliations":[],"preferred":false,"id":387830,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gilmour, C.C.","contributorId":63558,"corporation":false,"usgs":true,"family":"Gilmour","given":"C.C.","email":"","affiliations":[],"preferred":false,"id":387829,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Benoit, J.M.","contributorId":102648,"corporation":false,"usgs":true,"family":"Benoit","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":387833,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Babiarz, Christopher L.","contributorId":101822,"corporation":false,"usgs":false,"family":"Babiarz","given":"Christopher L.","affiliations":[],"preferred":false,"id":387832,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Andren, A.W.","contributorId":49121,"corporation":false,"usgs":true,"family":"Andren","given":"A.W.","email":"","affiliations":[],"preferred":false,"id":387828,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hurley, J.P.","contributorId":97645,"corporation":false,"usgs":true,"family":"Hurley","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":387831,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70020871,"text":"70020871 - 1998 - Models of metal binding structures in fulvic acid from the Suwannee River, Georgia","interactions":[],"lastModifiedDate":"2020-01-06T06:17:12","indexId":"70020871","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Models of metal binding structures in fulvic acid from the Suwannee River, Georgia","docAbstract":"Fulvic acid, isolated from the Suwannee River, Georgia, was assessed for its ability to bind Ca2+, Cd2+, Cu2+, Ni2+, and Zn2+ ions at pH 6 before and after extensive fractionation that was designed to reveal the nature of metal binding functional groups. The binding constant for Ca2+ ion had the greatest increase of all the ions in a metal binding fraction that was selected for intensive characterization for the purpose of building quantitative average model structures. The 'metal binding' fraction was characterized by quantitative 13C NMR, 1H NMR, and FT-1R spectrometry and elemental, titrimetric, and molecular weight determinations. The characterization data revealed that carboxyl groups were clustered in short- chain aliphatic dibasic acid structures. The Ca2+ binding data suggested that ether-substituted oxysuccinic acid structures are good models for the metal binding sites at pH 6. Structural models were derived based upon oxidation and photolytic rearrangements of cutin, lignin, and tannin precursors. These structural models rich in substituted dibasic acid structures revealed polydentate binding sites with the potential for both inner-sphere and outer-sphere type binding. The majority of the fulvic acid molecule was involved with metal binding rather than a small substructural unit.Fulvic acid, isolated from the Suwannee River, Georgia, was assessed for its ability to bind Ca2+, Cd2+, Cu2+, Ni2+, and Zn2+ ions at pH 6 before and after extensive fractionation that was designed to reveal the nature of metal binding functional groups. The binding constant for Ca2+ ion had the greatest increase of all the ions in a metal binding fraction that was selected for intensive characterization for the purpose of building quantitative average model structures. The `metal binding' fraction was characterized by quantitative 13C NMR, 1H NMR, and FT-IR spectrometry and elemental, titrimetric, and molecular weight determinations. The characterization data revealed that carboxyl groups were clustered in short-chain aliphatic dibasic acid structures. The Ca2+ binding data suggested that ether-substituted oxysuccinic acid structures are good models for the metal binding sites at pH 6. Structural models were derived based upon oxidation and photolytic rearrangements of cutin, lignin, and tannin precursors. These structural models rich in substituted dibasic acid structures revealed polydentate binding sites with the potential for both inner-sphere and outer-sphere type binding. The majority of the fulvic acid molecule was involved with metal binding rather than a small substructural unit.","language":"English","publisher":"ACS","doi":"10.1021/es9708979","issn":"0013936X","usgsCitation":"Leenheer, J., Brown, G., MacCarthy, P., and Cabaniss, S., 1998, Models of metal binding structures in fulvic acid from the Suwannee River, Georgia: Environmental Science & Technology, v. 32, no. 16, p. 2410-2416, https://doi.org/10.1021/es9708979.","productDescription":"7 p.","startPage":"2410","endPage":"2416","numberOfPages":"7","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":229759,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Georiga","otherGeospatial":"Suwannee 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 \"}}]}","volume":"32","issue":"16","noUsgsAuthors":false,"publicationDate":"1998-07-10","publicationStatus":"PW","scienceBaseUri":"505a5c80e4b0c8380cd6fd46","contributors":{"authors":[{"text":"Leenheer, J.A.","contributorId":75123,"corporation":false,"usgs":true,"family":"Leenheer","given":"J.A.","affiliations":[],"preferred":false,"id":387835,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brown, G.K.","contributorId":62362,"corporation":false,"usgs":true,"family":"Brown","given":"G.K.","email":"","affiliations":[],"preferred":false,"id":387834,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"MacCarthy, P.","contributorId":88081,"corporation":false,"usgs":true,"family":"MacCarthy","given":"P.","email":"","affiliations":[],"preferred":false,"id":387837,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cabaniss, S.E.","contributorId":76487,"corporation":false,"usgs":true,"family":"Cabaniss","given":"S.E.","email":"","affiliations":[],"preferred":false,"id":387836,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70020883,"text":"70020883 - 1998 - Hydrologic functions of prairie wetlands","interactions":[],"lastModifiedDate":"2013-02-24T11:31:11","indexId":"70020883","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1859,"text":"Great Plains Research","active":true,"publicationSubtype":{"id":10}},"title":"Hydrologic functions of prairie wetlands","docAbstract":"Wetlands in the prairie known as potholes or sloughs represent an ever-changing mosaic of surface waters interacting with the atmosphere, groundwater, and each other in a variety of ways. Studies of groups of adjacent wetlands in different parts of the glaciated North American prairie have enabled some connections to be made between hydrologic processes, biological communities, and use of these wetlands by wetland-dependent wildlife. Understanding controls on variability in water levels, water volume, and salinity in these wetlands sets the stage for understanding controls on biological communities utilizing these wetlands. The role that natural variability in water and salinity plays in making these wetlands an important resource for waterfowl will provide an important context for those who are responsible for artificially altering the variability of water and salinity in prairie wetlands.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Great Plains Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"10525165","usgsCitation":"LaBaugh, J.W., Winter, T.C., and Rosenberry, D., 1998, Hydrologic functions of prairie wetlands: Great Plains Research, v. 8, no. 1, p. 17-37.","startPage":"17","endPage":"37","numberOfPages":"21","costCenters":[],"links":[{"id":229920,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":268117,"type":{"id":11,"text":"Document"},"url":"https://digitalcommons.unl.edu/greatplainsresearch/361/"}],"volume":"8","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3633e4b0c8380cd604fa","contributors":{"authors":[{"text":"LaBaugh, J. W.","contributorId":23484,"corporation":false,"usgs":true,"family":"LaBaugh","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":387866,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Winter, T. C.","contributorId":23485,"corporation":false,"usgs":true,"family":"Winter","given":"T.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":387867,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rosenberry, D.O. 0000-0003-0681-5641","orcid":"https://orcid.org/0000-0003-0681-5641","contributorId":38500,"corporation":false,"usgs":true,"family":"Rosenberry","given":"D.O.","affiliations":[],"preferred":true,"id":387868,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020891,"text":"70020891 - 1998 - Colloid particle sizes in the Mississippi River and some of its tributaries, from Minneapolis to below New Orleans","interactions":[],"lastModifiedDate":"2019-01-30T09:35:06","indexId":"70020891","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1924,"text":"Hydrological Processes","active":true,"publicationSubtype":{"id":10}},"title":"Colloid particle sizes in the Mississippi River and some of its tributaries, from Minneapolis to below New Orleans","docAbstract":"<p>An on-board technique was developed that combined discharge-weighted pumping to a high-speed continuous-flow centrifuge for isolation of the particulate-sized material with ultrafiltration for isolation of colloid-sized material. In order to address whether these processes changed the particle sizes during isolation, samples of particles in suspension were collected at various steps in the isolation process to evaluate changes in particle size. Particle sizes were determined using laser light-scattering photon correlation spectroscopy and indicated no change in size during the colloid isolation process. Mississippi River colloid particle sizes from twelve sites from Minneapolis to below New Orleans were compared with sizes from four tributaries and three seasons, and from predominantly autochthonous sources upstream to more allochthonous sources downstream.&nbsp;</p>","language":"English","publisher":"Wiley","doi":"10.1002/(SICI)1099-1085(199801)12:1<25::AID-HYP544>3.0.CO;2-T","issn":"08856087","usgsCitation":"Rostad, C., Rees, T., and Daniel, S., 1998, Colloid particle sizes in the Mississippi River and some of its tributaries, from Minneapolis to below New Orleans: Hydrological Processes, v. 12, no. 1, p. 25-41, https://doi.org/10.1002/(SICI)1099-1085(199801)12:1<25::AID-HYP544>3.0.CO;2-T.","productDescription":"17 p.","startPage":"25","endPage":"41","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":230039,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"12","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f7b5e4b0c8380cd4cc7d","contributors":{"authors":[{"text":"Rostad, C.E.","contributorId":50939,"corporation":false,"usgs":true,"family":"Rostad","given":"C.E.","email":"","affiliations":[],"preferred":false,"id":387891,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rees, T.F.","contributorId":26068,"corporation":false,"usgs":true,"family":"Rees","given":"T.F.","email":"","affiliations":[],"preferred":false,"id":387889,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Daniel, S.R.","contributorId":28379,"corporation":false,"usgs":true,"family":"Daniel","given":"S.R.","email":"","affiliations":[],"preferred":false,"id":387890,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70020973,"text":"70020973 - 1998 - How good are estimates of transmissivity from slug tests in fractured rock?","interactions":[],"lastModifiedDate":"2018-12-21T07:32:55","indexId":"70020973","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"How good are estimates of transmissivity from slug tests in fractured rock?","docAbstract":"Slug tests in fractured rock usually are interpreted with models that assume homogeneous formation properties, even though hydraulic properties of fractures can vary by many orders of magnitude over the length of boreholes. To investigate the impact of heterogeneity on the interpretation of slug tests in fractured rock, slug tests were conducted over large intervals of boreholes in crystalline rock in central New Hampshire, and interpreted using a homogeneous model. The results of the slug tests were then compared with estimates of transmissivity from fluid-injection tests conducted over shorter intervals in the same boreholes. The fluid-injection tests showed transmissivity to vary more than six orders of magnitude over the length of the boreholes; however, the sum of the transmissivities from the fluid-injection tests were within an order of magnitude of the transmissivity estimated from the slug tests. Although the two estimates of transmissivity were within an order of magnitude of each other, the water level responses during the slug tests did not exactly match the responses predicted by the homogeneous model. To investigate the effect of heterogeneity on water level responses during slug tests, a Laplace-transform solution was developed for slug tests conducted in boreholes containing multiple fractures with hydraulic properties that vary over the length of the borehole. A comparison of this solution with the homogeneous model shows no difference between the shape of water level responses in a homogeneous formation and a (layered) heterogeneous formation. Furthermore, the transmissivity estimated using a homogeneous model is within an order of magnitude of the prescribed transmissivity in the heterogeneous model. Thus, differences between responses predicted from a homogeneous model and measured water levels during slug tests can be attributed to phenomena such as nonradial flow in the vicinity of the borehole, and not heterogeneous hydraulic properties over the length of the borehole. The experimental results of this investigation show that even when conditions such as nonradial flow are present in the vicinity of the borehole, interpretations of slug tests using a homogeneous model provided order-of-magnitude estimates of transmissivity in the crystalline rock terrane under consideration.Slug tests in fractured rock are usually interpreted with models that assume homogeneous formation properties, although hydraulic properties of fractures can vary by many order of magnitude over the length of the boreholes. To investigate the impact of heterogeneity on the interpretation of slug tests in fractured rocks, slug tests were conducted over large intervals of boreholes in crystalline rock in central New Hampshire. Tests results were interpreted using a homogeneous model. A Laplace-transform solution was developed for slug tests conducted in boreholes containing multiple fractures with hydraulic properties. Finally, a comparison was made between this solution and the homogeneous model.","language":"English","publisher":"Ground Water Publ Co","doi":"10.1111/j.1745-6584.1998.tb01063.x","issn":"0017467X","usgsCitation":"Shapiro, A., and Hsieh, P.A., 1998, How good are estimates of transmissivity from slug tests in fractured rock?: Ground Water, v. 36, no. 1, p. 37-48, https://doi.org/10.1111/j.1745-6584.1998.tb01063.x.","productDescription":"12 p.","startPage":"37","endPage":"48","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":229885,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"1","noUsgsAuthors":false,"publicationDate":"2005-08-04","publicationStatus":"PW","scienceBaseUri":"505a324be4b0c8380cd5e6b4","contributors":{"authors":[{"text":"Shapiro, A.M. 0000-0002-6425-9607","orcid":"https://orcid.org/0000-0002-6425-9607","contributorId":88384,"corporation":false,"usgs":true,"family":"Shapiro","given":"A.M.","affiliations":[],"preferred":true,"id":388162,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hsieh, P. A.","contributorId":40596,"corporation":false,"usgs":true,"family":"Hsieh","given":"P.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":388161,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70021018,"text":"70021018 - 1998 - Simulated effects of irrigation on salinity in the Arkansas River Valley in Colorado","interactions":[],"lastModifiedDate":"2019-02-04T07:59:50","indexId":"70021018","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"Simulated effects of irrigation on salinity in the Arkansas River Valley in Colorado","docAbstract":"Agricultural irrigation has a substantial impact on water quantity and quality in the lower Arkansas River valley of southeastern Colorado. A two-dimensional flow and solute transport model was used to evaluate the potential effects of changes in irrigation on the quantity and quality of water in the alluvial aquifer and in the Arkansas River along an 17.7 km reach of the fiver. The model was calibrated to aquifer water level and dissolved solids concentration data collected throughout the 24 year study period (197195). Two categories of irrigation management were simulated with the calibrated model: (1) a decrease in ground water withdrawals for irrigation; and (2) cessation of all irrigation from ground water and surface water sources. In the modeled category of decreased irrigation from ground water pumping, there was a resulting 6.9% decrease in the average monthly ground water salinity, a 0.6% decrease in average monthly river salinity, and an 11.1% increase in ground water return flows to the river. In the modeled category of the cessation of all irrigation, average monthly ground water salinity decreased by 25%; average monthly river salinity decreased by 4.4%; and ground water return flows to the river decreased by an average of 64%. In all scenarios, simulated ground water salinity decreased relative to historical conditions for about 12 years before reaching a new dynamic equilibrium condition. Aquifer water levels were not sensitive to any of the modeled scenarios. These potential changes in salinity could result in improved water quality for irrigation purposes downstream from the affected area.","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.1998.tb01067.x","issn":"0017467X","usgsCitation":"Goff, K., Lewis, M., Person, M., and Konikow, L.F., 1998, Simulated effects of irrigation on salinity in the Arkansas River Valley in Colorado: Ground Water, v. 36, no. 1, p. 76-86, https://doi.org/10.1111/j.1745-6584.1998.tb01067.x.","productDescription":"11 p.","startPage":"76","endPage":"86","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":229969,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"1","noUsgsAuthors":false,"publicationDate":"2005-08-04","publicationStatus":"PW","scienceBaseUri":"505b8f97e4b08c986b319009","contributors":{"authors":[{"text":"Goff, K.","contributorId":50683,"corporation":false,"usgs":true,"family":"Goff","given":"K.","email":"","affiliations":[],"preferred":false,"id":388307,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lewis, M.E.","contributorId":65504,"corporation":false,"usgs":true,"family":"Lewis","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":388308,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Person, M.A.","contributorId":91108,"corporation":false,"usgs":true,"family":"Person","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":388309,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"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":388306,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70021026,"text":"70021026 - 1998 - Simulation of variable-density flow and transport of reactive and nonreactive solutes during a tracer test at Cape Cod, Massachusetts","interactions":[],"lastModifiedDate":"2019-02-01T06:17:04","indexId":"70021026","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Simulation of variable-density flow and transport of reactive and nonreactive solutes during a tracer test at Cape Cod, Massachusetts","docAbstract":"<p><span>A multispecies numerical code was developed to simulate flow and mass transport with kinetic adsorption in variable-density flow systems. The two-dimensional code simulated the transport of bromide (Br</span><sup>−</sup><span>), a nonreactive tracer, and lithium (Li</span><sup>+</sup><span>), a reactive tracer, in a large-scale tracer test performed in a sand-and-gravel aquifer at Cape Cod, Massachusetts. A two-fraction kinetic adsorption model was implemented to simulate the interaction of Li</span><sup>+</sup><span><span>&nbsp;</span>with the aquifer solids. Initial estimates for some of the transport parameters were obtained from a nonlinear least squares curve-fitting procedure, where the breakthrough curves from column experiments were matched with one-dimensional theoretical models. The numerical code successfully simulated the basic characteristics of the two plumes in the tracer test. At early times the centers of mass of Br</span><sup>−</sup><span><span>&nbsp;</span>and Li</span><sup>+</sup><span><span>&nbsp;</span>sank because the two plumes were closely coupled to the density-driven velocity field. At later times the rate of downward movement in the Br</span><sup>−</sup><span><span>&nbsp;</span>plume due to gravity slowed significantly because of dilution by dispersion. The downward movement of the Li</span><sup>+</sup><span><span>&nbsp;</span>plume was negligible because the two plumes moved in locally different velocity regimes, where Li</span><sup>+</sup><span><span>&nbsp;</span>transport was retarded relative to Br</span><sup>−</sup><span>. The maximum extent of downward transport of the Li</span><sup>+</sup><span><span>&nbsp;</span>plume was less than that of the Br</span><sup>−</sup><span><span>&nbsp;</span>plume. This study also found that at early times the downward movement of a plume created by a three-dimensional source could be much more extensive than the case with a two-dimensional source having the same cross-sectional area. The observed shape of the Br</span><sup>−</sup><span><span>&nbsp;</span>plume at Cape Cod was simulated by adding two layers with different hydraulic conductivities at shallow depth across the region. The large dispersion and asymmetrical shape of the Li</span><sup>+</sup><span><span>&nbsp;</span>plume were simulated by including kinetic adsorption-desorption reactions.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/97WR02918","usgsCitation":"Zhang, H., Schwartz, F.W., Wood, W., Garabedian, S., and LeBlanc, D., 1998, Simulation of variable-density flow and transport of reactive and nonreactive solutes during a tracer test at Cape Cod, Massachusetts: Water Resources Research, v. 34, no. 1, p. 67-82, https://doi.org/10.1029/97WR02918.","productDescription":"16 p.","startPage":"67","endPage":"82","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487377,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/97wr02918","text":"Publisher Index Page"},{"id":230087,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Massachusetts","otherGeospatial":"Cape Cod","volume":"34","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b90b6e4b08c986b31963e","contributors":{"authors":[{"text":"Zhang, Hubao","contributorId":196105,"corporation":false,"usgs":false,"family":"Zhang","given":"Hubao","email":"","affiliations":[],"preferred":false,"id":388339,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schwartz, Frank W.","contributorId":196083,"corporation":false,"usgs":false,"family":"Schwartz","given":"Frank","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":388338,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wood, Warren W.","contributorId":47770,"corporation":false,"usgs":false,"family":"Wood","given":"Warren W.","affiliations":[{"id":6601,"text":"Michigan State University","active":true,"usgs":false}],"preferred":false,"id":388337,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Garabedian, S. P.","contributorId":56657,"corporation":false,"usgs":true,"family":"Garabedian","given":"S. P.","affiliations":[],"preferred":false,"id":388340,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"LeBlanc, D.R.","contributorId":87141,"corporation":false,"usgs":true,"family":"LeBlanc","given":"D.R.","email":"","affiliations":[],"preferred":false,"id":388341,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70021041,"text":"70021041 - 1998 - AIRSLUG: A fortran program for the computation of type curves to estimate transmissivity and storativity from prematurely terminated air-pressurized slug tests","interactions":[],"lastModifiedDate":"2019-02-01T06:00:45","indexId":"70021041","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1861,"text":"Ground Water","active":true,"publicationSubtype":{"id":10}},"title":"AIRSLUG: A fortran program for the computation of type curves to estimate transmissivity and storativity from prematurely terminated air-pressurized slug tests","docAbstract":"The Fortran code AIRSLUG can be used to generate the type curves needed to analyze the recovery data from prematurely terminated air-pressurized slug tests. These type curves, when used with a graphical software package, enable the engineer or scientist to analyze field tests to estimate transmissivity and storativity. Prematurely terminating the slug test can significantly reduce the overall time needed to conduct the test, especially at low-permeability sites, thus saving time and money.The Fortran code AIRSLUG can be used to generate the type curves needed to analyze the recovery data from prematurely terminated air-pressurized slug tests. These type curves, when used with a graphical software package, enable the engineer or scientist to analyze field tests to estimate transmissivity and storativity. Prematurely terminating the slug test can significantly reduce the overall time needed to conduct the test, especially at low-permeability sites, thus saving time and money.","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.1998.tb01103.x","issn":"0017467X","usgsCitation":"Greene, E., and Shapiro, A., 1998, AIRSLUG: A fortran program for the computation of type curves to estimate transmissivity and storativity from prematurely terminated air-pressurized slug tests: Ground Water, v. 36, no. 2, p. 373-375, https://doi.org/10.1111/j.1745-6584.1998.tb01103.x.","productDescription":"3 p.","startPage":"373","endPage":"375","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":479779,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1745-6584.1998.tb01103.x","text":"Publisher Index Page"},{"id":229653,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"36","issue":"2","noUsgsAuthors":false,"publicationDate":"2005-08-04","publicationStatus":"PW","scienceBaseUri":"5059e629e4b0c8380cd471d1","contributors":{"authors":[{"text":"Greene, E.A.","contributorId":75575,"corporation":false,"usgs":true,"family":"Greene","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":388387,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Shapiro, A.M. 0000-0002-6425-9607","orcid":"https://orcid.org/0000-0002-6425-9607","contributorId":88384,"corporation":false,"usgs":true,"family":"Shapiro","given":"A.M.","affiliations":[],"preferred":true,"id":388388,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70021042,"text":"70021042 - 1998 - Humic substances as a mediator for microbially catalyzed metal reduction","interactions":[],"lastModifiedDate":"2019-01-30T10:53:31","indexId":"70021042","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":636,"text":"Acta Hydrochimica et Hydrobiologica","active":true,"publicationSubtype":{"id":10}},"title":"Humic substances as a mediator for microbially catalyzed metal reduction","docAbstract":"<div class=\"abstract-group\"><div class=\"article-section__content en main\"><p>The potential for humic substances to serve as a terminal electron acceptor in microbial respiration and to function as an electron shuttle between Fe(III)‐reducing microorganisms and insoluble Fe(III) oxides was investigated. The Fe(III)‐reducing microorganism<span>&nbsp;</span><i>Geobacter metallireducens</i><span>&nbsp;</span>conserved energy to support growth from electron transport to humics as evidenced by continued oxidation of acetate to carbon dioxide after as many as nine transfers in a medium with acetate as the electron donor and soil humic acids as the electron acceptor. Growth of<span>&nbsp;</span><i>G. metallireducens</i><span>&nbsp;</span>with poorly crystalline Fe(III) oxide as the electron acceptor was greatly stimulated by the addition of as little as 100 μM of the humics analog, anthraquinone‐2,6‐disulfonate. Other quinones investigated, including lawsone, menadione, and anthraquinone‐2‐sulfonate, also stimulated Fe(III) oxide reduction. A wide phylogenetic diversity of microorganisms capable of Fe(III) reduction were also able to transfer electrons to humics. Microorganisms which can not reduce Fe(III) could not reduce humics. Humics stimulated the reduction of structural Fe(III) in clay and the crystalline Fe(III) forms, goethite and hematite. These results demonstrate that electron shuttling between Fe(III)‐reducing microorganisms and Fe(III) via humics not only accelerates the microbial reduction of poorly crystalline Fe(III) oxide, but also can facilitate the reduction of Fe(III) forms that are not typically reduced by microorganisms in the absence of humics. Addition of humic substances to enhance electron shuttling between Fe(III)‐reducing microorganisms and Fe(III) oxides may be a useful strategy to stimulate the remediation of soils and sediments contaminated with organic or metal pollutants.</p></div></div>","language":"English","publisher":"WIley","doi":"10.1002/(SICI)1521-401X(199805)26:3<152::AID-AHEH152>3.0.CO;2-D","issn":"03234320","usgsCitation":"Lovley, D.R., Fraga, J., Blunt-Harris, E.L., Hayes, L., Phillips, E.J., and Coates, J., 1998, Humic substances as a mediator for microbially catalyzed metal reduction: Acta Hydrochimica et Hydrobiologica, v. 26, no. 3, p. 152-157, https://doi.org/10.1002/(SICI)1521-401X(199805)26:3<152::AID-AHEH152>3.0.CO;2-D.","productDescription":"6 p.","startPage":"152","endPage":"157","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":206406,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/(SICI)1521-401X(199805)26:3<152::AID-AHEH152>3.0.CO;2-D"},{"id":229654,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a328ae4b0c8380cd5e8b9","contributors":{"authors":[{"text":"Lovley, Derek R.","contributorId":107852,"corporation":false,"usgs":true,"family":"Lovley","given":"Derek","middleInitial":"R.","affiliations":[],"preferred":false,"id":388394,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fraga, J.L.","contributorId":61197,"corporation":false,"usgs":true,"family":"Fraga","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":388390,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Blunt-Harris, E. L.","contributorId":63980,"corporation":false,"usgs":true,"family":"Blunt-Harris","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":388391,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hayes, L.A.","contributorId":96035,"corporation":false,"usgs":true,"family":"Hayes","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":388392,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Phillips, Elizabeth J.P.","contributorId":37475,"corporation":false,"usgs":true,"family":"Phillips","given":"Elizabeth","middleInitial":"J.P.","affiliations":[],"preferred":false,"id":388389,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Coates, J.D.","contributorId":105451,"corporation":false,"usgs":true,"family":"Coates","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":388393,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70021063,"text":"70021063 - 1998 - Black Mats, Spring-Fed Streams, and Late-Glacial-Age Recharge in the Southern Great Basin","interactions":[],"lastModifiedDate":"2013-01-25T13:22:17","indexId":"70021063","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Black Mats, Spring-Fed Streams, and Late-Glacial-Age Recharge in the Southern Great Basin","docAbstract":"Black mats are prominent features of the late Pleistocene and Holocene stratigraphic record in the southern Great Basin. Faunal, geochemical, and sedimentological evidence shows that the black mats formed in several microenvironments related to spring discharge, ranging from wet meadows to shallow ponds. Small land snails such as Gastrocopta tappaniana and Vertigo berryi are the most common mollusk taxa present. Semiaquatic and aquatic taxa are less abundant and include Catinellids, Fossaria parva, Gyraulus parvus, and others living today in and around perennial seeps and ponds. The ostracodes Cypridopsis okeechobi and Scottia tumida, typical of seeps and low-discharge springs today, as well as other taxa typical of springs and wetlands, are common in the black mats. Several new species that lived in the saturated subsurface also are present, but lacustrine ostracodes are absent. The ??13C values of organic matter in the black mats range from -12 to -26???, reflecting contributions of tissue from both C3 (sedges, most shrubs and trees) and C4 (saltbush, saltgrass) plants. Carbon-14 dates on the humate fraction of 55 black mats fall between 11,800 to 6300 and 2300 14C yr B.P. to modern. The total absence of mats in our sample between 6300 and 2300 14C yr B.P. likely reflects increased aridity associated with the mid-Holocene Altithermal. The oldest black mats date to 11,800-11,600 14C yr B.P., and the peak in the 14C black mat distribution falls at ???10,000 14C yr B.P. As the formation of black mats is spring related, their abundance reflects refilling of valley aquifers starting no later than 11,800 and peaking after 11,000 14C yrB.P. Reactivation of spring-fed channels shortly before 11,200 14C yr B.P. is also apparent in the stratigraphic records from the Las Vegas and Pahrump Valleys. This age distribution suggests that black mats and related spring-fed channels in part may have formed in response to Younger Dryas (YD)-age recharge in the region. However, the inception of black mat formation precedes that of the YD by at least 400 14C yr, and hydrological change is gradual, not rapid. ?? 1998 University of Washington.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1006/qres.1997.1959","issn":"00335894","usgsCitation":"Quade, J., Forester, R.M., Pratt, W., and Carter, C., 1998, Black Mats, Spring-Fed Streams, and Late-Glacial-Age Recharge in the Southern Great Basin: Quaternary Research, v. 49, no. 2, p. 129-148, https://doi.org/10.1006/qres.1997.1959.","startPage":"129","endPage":"148","numberOfPages":"20","costCenters":[],"links":[{"id":230050,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":266457,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1006/qres.1997.1959"}],"volume":"49","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"5059f1d5e4b0c8380cd4ae54","contributors":{"authors":[{"text":"Quade, Jay","contributorId":22108,"corporation":false,"usgs":false,"family":"Quade","given":"Jay","affiliations":[{"id":7042,"text":"University of Arizona","active":true,"usgs":false}],"preferred":false,"id":388509,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Forester, R. M.","contributorId":76332,"corporation":false,"usgs":true,"family":"Forester","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":388511,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Pratt, W.L.","contributorId":59972,"corporation":false,"usgs":true,"family":"Pratt","given":"W.L.","email":"","affiliations":[],"preferred":false,"id":388510,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Carter, C.","contributorId":96293,"corporation":false,"usgs":true,"family":"Carter","given":"C.","email":"","affiliations":[],"preferred":false,"id":388512,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70021078,"text":"70021078 - 1998 - Exchanges of sediment between the flood plain and channel of the Amazon River in Brazil","interactions":[],"lastModifiedDate":"2023-12-20T12:18:54.969938","indexId":"70021078","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Exchanges of sediment between the flood plain and channel of the Amazon River in Brazil","docAbstract":"<div id=\"15009048\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><div id=\"15009048\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Sediment transport through the Brazilian sector of the Amazon River valley, a distance of 2010 km, involves exchanges between the channel and the flood plain that in each direction exceed the annual flux of sediment out of the river at Óbidos (∼1200 Mt yr<sup>−1</sup>). The exchanges occur through bank erosion, bar deposition, settling from diffuse overbank flow, and sedimentation in flood-plain channels. We estimated the magnitude of these exchanges for each of 10 reaches of the valley, and combined them with calculations of sediment transport into and out of the reaches based on sediment sampling and flow records to define a sediment budget for each reach. Residuals in the sediment budget of a reach include errors of estimation and erosion or deposition within the channel. The annual supply of sediment entering the channel from bank erosion was estimated to average 1570 Mt yr<sup>−1</sup><span>&nbsp;</span>(1.3 × the Óbidos flux) and the amount transferred from channel transport to the bars (380 Mt yr<sup>−1</sup>) and the flood plain (460 Mt yr<sup>−1</sup><span>&nbsp;</span>in channelized flow; 1230 Mt yr<sup>−1</sup><span>&nbsp;</span>in diffuse overbank flow) totaled 2070 Mt yr<sup>−1</sup><span>&nbsp;</span>(1.7 × the Óbidos flux). Thus, deposition on the bars and flood plain exceeded bank erosion by 500 Mt yr<sup>−1</sup><span>&nbsp;</span>over a 10–16 yr period. Sampling and calculation of sediment loads in the channel indicate a net accumulation in the valley floor of approximately 200 Mt yr<sup>−1</sup><span>&nbsp;</span>over 16 yr, crudely validating the process-based calculations of the sediment budget, which in turn illuminate the physical controls on each exchange process. Another 300–400 Mt yr<sup>−1</sup><span>&nbsp;</span>are deposited in a delta plain downstream of Óbidos. The components of the sediment budget reflect hydrologic characteristics of the valley floor and geomorphic characteristics of the channel and flood plain, which in turn are influenced by tectonic features of the Amazon structural trough.</p></div></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1998)110<0450:EOSBTF>2.3.CO;2","issn":"00167606","usgsCitation":"Dunne, T., Mertes, L., Meade, R., Richey, J., and Forsberg, B., 1998, Exchanges of sediment between the flood plain and channel of the Amazon River in Brazil: Geological Society of America Bulletin, v. 110, no. 4, p. 450-467, https://doi.org/10.1130/0016-7606(1998)110<0450:EOSBTF>2.3.CO;2.","productDescription":"18 p.","startPage":"450","endPage":"467","numberOfPages":"18","costCenters":[],"links":[{"id":229693,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Brazil","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -69.82465204909566,\n              4.030791362559043\n            ],\n            [\n              -69.82465204909566,\n              -5.449830770615193\n            ],\n            [\n              -45.74262079909562,\n              -5.449830770615193\n            ],\n            [\n              -45.74262079909562,\n              4.030791362559043\n            ],\n            [\n              -69.82465204909566,\n              4.030791362559043\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"110","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0da9e4b0c8380cd53129","contributors":{"authors":[{"text":"Dunne, T.","contributorId":25695,"corporation":false,"usgs":true,"family":"Dunne","given":"T.","email":"","affiliations":[],"preferred":false,"id":388577,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mertes, L.A.K.","contributorId":50681,"corporation":false,"usgs":true,"family":"Mertes","given":"L.A.K.","affiliations":[],"preferred":false,"id":388579,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Meade, R.H.","contributorId":27449,"corporation":false,"usgs":true,"family":"Meade","given":"R.H.","email":"","affiliations":[],"preferred":false,"id":388578,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Richey, J.E.","contributorId":18508,"corporation":false,"usgs":true,"family":"Richey","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":388576,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Forsberg, B.R.","contributorId":78109,"corporation":false,"usgs":true,"family":"Forsberg","given":"B.R.","email":"","affiliations":[],"preferred":false,"id":388580,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70021087,"text":"70021087 - 1998 - Multivariate classification of small order watersheds in the Quabbin Reservoir Basin, Massachusetts","interactions":[],"lastModifiedDate":"2024-05-24T11:23:19.105182","indexId":"70021087","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2529,"text":"Journal of the American Water Resources Association","active":true,"publicationSubtype":{"id":10}},"title":"Multivariate classification of small order watersheds in the Quabbin Reservoir Basin, Massachusetts","docAbstract":"<div class=\"abstract-group \"><div class=\"article-section__content en main\"><p><strong>ABSTRACT:<span>&nbsp;</span></strong>A multivariate approach was used to analyze hydrologic, geologic, geographic, and water-chemistry data from small order watersheds in the Quabbin Reservoir Basin in central Massachusetts. Eighty three small order watersheds were delineated and landscape attributes defining hydrologic, geologic, and geographic features of the watersheds were compiled from geographic information system data layers. Principal components analysis was used to evaluate 11 chemical constituents collected bi-weekly for 1 year at 15 surface-water stations in order to subdivide the basin into subbasins comprised of watersheds with similar water quality characteristics. Three principal components accounted for about 90 percent of the variance in water chemistry data. The principal components were defined as a biogeochemical variable related to wet. land density, an acid-neutralization variable, and a road-salt variable related to density of primary roads. Three subbasins were identified. Analysis of variance and multiple comparisons of means were used to identify significant differences in stream water chemistry and landscape attributes among subbasins. All stream water constituents were significantly different among subbasins. Multiple regression techniques were used to relate stream water chemistry to landscape attributes. Important differences in landscape attributes were related to wetlands, slope, and soil type.</p></div></div>","language":"English","publisher":"American Water Resources Association","doi":"10.1111/j.1752-1688.1998.tb04147.x","issn":"1093474X","usgsCitation":"Lent, R., Waldron, M., and Rader, J.C., 1998, Multivariate classification of small order watersheds in the Quabbin Reservoir Basin, Massachusetts: Journal of the American Water Resources Association, v. 34, no. 2, p. 439-450, https://doi.org/10.1111/j.1752-1688.1998.tb04147.x.","productDescription":"12 p.","startPage":"439","endPage":"450","numberOfPages":"12","costCenters":[],"links":[{"id":229850,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"505a60b7e4b0c8380cd7163d","contributors":{"authors":[{"text":"Lent, R.M.","contributorId":80317,"corporation":false,"usgs":true,"family":"Lent","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":388604,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Waldron, M.C.","contributorId":33342,"corporation":false,"usgs":true,"family":"Waldron","given":"M.C.","email":"","affiliations":[],"preferred":false,"id":388603,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rader, J. C.","contributorId":95107,"corporation":false,"usgs":true,"family":"Rader","given":"J.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":388605,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70021092,"text":"70021092 - 1998 - Effects of a beaver pond on runoff processes: comparison of two headwater catchments","interactions":[],"lastModifiedDate":"2015-01-16T11:13:42","indexId":"70021092","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","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":"Effects of a beaver pond on runoff processes: comparison of two headwater catchments","docAbstract":"<p><span>Natural variations in concentrations of&nbsp;</span><sup>18</sup><span>O, D, and H</span><sub>4</sub><span>SiO</span><sub>4</sub><span>&nbsp;in two tributary catchments of Woods Lake in the west-central Adirondack Mountains of New York were measured during 1989&ndash;1991 to examine runoff processes and their implications for the neutralization of acidic precipitation by calcium carbonate treatment. The two catchments are similar except that one contained a 1.3 ha beaver pond. Evaporation from the beaver pond caused a seasonal decrease in the slope of the meteoric water line in stream water from the catchment with a beaver pond (WO2). No corresponding change in slope of the meteoric water line was evident in stream water from the other catchment (WO4), nor in ground water nor soil water from either catchment, indicating that evaporative fractionation was not significant. Application of a best-fit sine curve to&nbsp;</span><i>&delta;</i><sup>18</sup><span>O data indicated that base flow in both catchments had a residence time of about 100 days. Ground water from a well finished in thick till had the longest residence time (160 days); soil water from the O-horizon and B-horizon had residence times of 63 and 80 days, respectively. Water previously stored within each catchment (pre-event water) was the predominant component of streamflow during spring snowmelt and during spring and autumn rainfall events, but the proportion of streamflow that consisted of pre-event water differed significantly in the two catchments. The proportion of event water (rain and snowmelt) in WO2 was smaller than at WO4 early in the spring snowmelt of March 13&ndash;17, 1990, but the proportions of source water components for the two catchments were almost indistinguishable by the peak flow on the third day of the melt. The event water was further separated into surface-water and subsurface-water components by utilizing measured changes in H</span><sub>4</sub><span>SiO</span><sub>4</sub><span>&nbsp;concentrations in stream water during the snowmelt. Results indicated that subsurface flow was the dominant pathway by which event water reached the stream except during the peak flow of a rain-on-snow event on the last day of the melt. Streamflow from a spring rain storm with dry antecendent conditions two months later (May 16&ndash;18, 1990), was less than 5% event water at peak flow in WO2 and 26% in WO4. This change from the runoff pattern in March is attributed to retention of event water in the beaver pond favored by relatively low pre-event storage and isothermal (nonstratified) conditions in the pond that allowed mixing. Streamflow during several autumn storms was about 15&ndash;25% event water at peak flow in WO4; the highest values for event water were associated with wet antecedent moisture conditions. These results indicate that a beaver pond can significantly affect the downstream delivery of event water through evaporation and mixing, but provides minimal retention during large runoff events such as snowmelt. Beaver ponds are expected to provide greater opportunity for neutralization of acidic waters during most of the year in catchments treated with calcium carbonate, but little neutralization effect during snowmelt.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/S0022-1694(98)00081-X","usgsCitation":"Burns, D.A., and McDonnell, J.J., 1998, Effects of a beaver pond on runoff processes: comparison of two headwater catchments: Journal of Hydrology, v. 205, no. 3-4, p. 248-264, https://doi.org/10.1016/S0022-1694(98)00081-X.","productDescription":"17 p.","startPage":"248","endPage":"264","numberOfPages":"17","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"links":[{"id":229893,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"205","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a066be4b0c8380cd5122c","contributors":{"authors":[{"text":"Burns, Douglas A. 0000-0001-6516-2869 daburns@usgs.gov","orcid":"https://orcid.org/0000-0001-6516-2869","contributorId":1237,"corporation":false,"usgs":true,"family":"Burns","given":"Douglas","email":"daburns@usgs.gov","middleInitial":"A.","affiliations":[{"id":474,"text":"New York Water Science Center","active":true,"usgs":true}],"preferred":true,"id":388624,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McDonnell, Jeffery J. 0000-0002-3880-3162","orcid":"https://orcid.org/0000-0002-3880-3162","contributorId":62723,"corporation":false,"usgs":false,"family":"McDonnell","given":"Jeffery","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":388625,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70021100,"text":"70021100 - 1998 - Microbial mineralization of VC and DCE under different terminal electron accepting conditions","interactions":[],"lastModifiedDate":"2019-02-04T09:54:33","indexId":"70021100","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":757,"text":"Anaerobe","active":true,"publicationSubtype":{"id":10}},"title":"Microbial mineralization of VC and DCE under different terminal electron accepting conditions","docAbstract":"Production of 14CO2 from [1,2-14C] dichloroethene (DCE) or [1,2-14C] vinyl chloride (VC) was quantified in aquifer and stream-bed sediment microcosms to evaluate the potential for microbial mineralization as a pathway for DCE and VC biodegradation under aerobic, Fe(III)-reducing, SO4-reducing, and methanogenic conditions. Mineralization of [1,2-14C] DCE and [1,2-14C] VC to 14CO2 decreased under increasingly reducing conditions, but significant mineralization was observed for both sediments even under anaerobic conditions. VC mineralization decreased in the order of aerobic > Fe(III)-reducing > SO4-reducing > methanogenic conditions. For both sediments, VC mineralization was greater than DCE mineralization under all electron-accepting conditions examined. For both sediments, DCE mineralization was at least two times greater under aerobic conditions than under anaerobic conditions. Although significant microbial mineralization of DCE was observed under anaerobic conditions, recovery of 14CO2 did not differ substantially between anaerobic treatments.","language":"English","publisher":"Elsevier","doi":"10.1006/anae.1998.0150","issn":"10759964","usgsCitation":"Bradley, P., and Chapelle, F.H., 1998, Microbial mineralization of VC and DCE under different terminal electron accepting conditions: Anaerobe, v. 4, no. 2, p. 81-87, https://doi.org/10.1006/anae.1998.0150.","productDescription":"7 p.","startPage":"81","endPage":"87","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":230012,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":206498,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1006/anae.1998.0150"}],"volume":"4","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5653e4b0c8380cd6d4ed","contributors":{"authors":[{"text":"Bradley, P. M. 0000-0001-7522-8606","orcid":"https://orcid.org/0000-0001-7522-8606","contributorId":29465,"corporation":false,"usgs":true,"family":"Bradley","given":"P. M.","affiliations":[],"preferred":false,"id":388644,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chapelle, F. H.","contributorId":101697,"corporation":false,"usgs":true,"family":"Chapelle","given":"F.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":388645,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70021102,"text":"70021102 - 1998 - Salinity trends in surface waters of the Upper Colorado River Basin, Colorado","interactions":[],"lastModifiedDate":"2024-03-29T11:20:35.700744","indexId":"70021102","displayToPublicDate":"1998-01-01T00:00:00","publicationYear":"1998","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2262,"text":"Journal of Environmental Quality","active":true,"publicationSubtype":{"id":10}},"title":"Salinity trends in surface waters of the Upper Colorado River Basin, Colorado","docAbstract":"<div class=\"\"><div class=\"article-section__content en main\"><p>Dissolved-solids data collected in the Upper Colorado River Basin upstream from Cameo, Colorado, and in the Gunnison River Basin were analyzed for trends in flow-adjusted dissolved-solids concentrations and loads for water years 1970 to 1993, 1980 to 1993, and 1986 to 1993. Trend results for flow-adjusted periodic dissolved-solids concentrations for the Colorado River Basin upstream from Cameo, CO, generally were downward or no trend was indicated. Trends in flow-adjusted monthly and annual dissolved-solids loads primarily were downward or absent. These trend results partly agree with the downward trends reported by a previous investigation for the Colorado River near Cameo site. In the Gunnison River Basin, trends in flow-adjusted dissolved-solids concentrations and loads were not detected for more than one-half of the site/analysis-period combinations. Of the trends that were present, most indicated decreases in concentrations and loads rather than increases. In both the Colorado River Basin upstream from Cameo, CO, and the Gunnison River Basin, trends in flow-adjusted dissolved-solids concentrations and flow-adjusted monthly and annual dissolved-solids loads may be affected by a variety of factors. These include channel evolution and hydrologic variation, water quality and flow rate of groundwater discharges and springs, sample size and period of record of dissolved-solids data, and changes in land use in the basin.</p></div></div>","language":"English","publisher":"Wiley","doi":"10.2134/jeq1998.00472425002700030023x","issn":"00472425","usgsCitation":"Bauch, N., and Spahr, N., 1998, Salinity trends in surface waters of the Upper Colorado River Basin, Colorado: Journal of Environmental Quality, v. 27, no. 3, p. 640-655, https://doi.org/10.2134/jeq1998.00472425002700030023x.","productDescription":"16 p.","startPage":"640","endPage":"655","numberOfPages":"16","costCenters":[],"links":[{"id":230051,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc8ffe4b08c986b32cbf0","contributors":{"authors":[{"text":"Bauch, N.J.","contributorId":64688,"corporation":false,"usgs":true,"family":"Bauch","given":"N.J.","email":"","affiliations":[],"preferred":false,"id":388649,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Spahr, N.E.","contributorId":79476,"corporation":false,"usgs":true,"family":"Spahr","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":388650,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}