{"pageNumber":"344","pageRowStart":"8575","pageSize":"25","recordCount":16445,"records":[{"id":70023514,"text":"70023514 - 2001 - Distribution of inorganic mercury in Sacramento River water and suspended colloidal sediment material","interactions":[],"lastModifiedDate":"2018-11-30T05:51:10","indexId":"70023514","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":887,"text":"Archives of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Distribution of inorganic mercury in Sacramento River water and suspended colloidal sediment material","docAbstract":"<p class=\"Para\">The concentration and distribution of inorganic Hg was measured using cold-vapor atomic fluorescence spectrometry in samples collected at selected sites on the Sacramento River from below Shasta Dam to Freeport, CA, at six separate times between 1996 and 1997. Dissolved (ultrafiltered, 0.005 μm equivalent pore size) Hg concentrations remained relatively constant throughout the system, ranging from the detection limit (&lt; 0.4 ng/L) to 2.4 ng/L. Total Hg (dissolved plus colloidal suspended sediment) concentrations ranged from the detection limit at the site below Shasta Dam in September 1996 to 81 ng/L at the Colusa site in January 1997, demonstrating that colloidal sediment plays an important role in the downriver Hg transport. Sequential extractions of colloid concentrates indicate that the greatest amount of Hg associated with sediment was found in the “residual” (mineral) phase with a significant quantity also occurring in the “oxidizable” phase. Only a minor amount of Hg was observed in the “reducible” phase. Dissolved Hg loads remained constant or increased slightly in the downstream direction through the study area, whereas the total inorganic Hg load increased significantly downstream especially in the reach of the river between Bend Bridge and Colusa. Analysis of temporal variations showed that Hg loading was positively correlated to discharge.</p>","language":"English","publisher":"Springer","doi":"10.1007/s002440010159","issn":"00904341","usgsCitation":"Roth, D., Taylor, H.E., Domagalski, J.L., Dileanis, P.D., Peart, D., Antweiler, R.C., and Alpers, C.N., 2001, Distribution of inorganic mercury in Sacramento River water and suspended colloidal sediment material: Archives of Environmental Contamination and Toxicology, v. 40, no. 2, p. 161-172, https://doi.org/10.1007/s002440010159.","productDescription":"12 p.","startPage":"161","endPage":"172","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":232737,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":207627,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s002440010159"}],"volume":"40","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a02dbe4b0c8380cd5021e","contributors":{"authors":[{"text":"Roth, D.A.","contributorId":100864,"corporation":false,"usgs":true,"family":"Roth","given":"D.A.","email":"","affiliations":[],"preferred":false,"id":397892,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Taylor, Howard E. hetaylor@usgs.gov","contributorId":1551,"corporation":false,"usgs":true,"family":"Taylor","given":"Howard","email":"hetaylor@usgs.gov","middleInitial":"E.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":397887,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Domagalski, Joseph L. 0000-0002-6032-757X joed@usgs.gov","orcid":"https://orcid.org/0000-0002-6032-757X","contributorId":1330,"corporation":false,"usgs":true,"family":"Domagalski","given":"Joseph","email":"joed@usgs.gov","middleInitial":"L.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":397890,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dileanis, Peter D. dileanis@usgs.gov","contributorId":71541,"corporation":false,"usgs":true,"family":"Dileanis","given":"Peter","email":"dileanis@usgs.gov","middleInitial":"D.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":false,"id":397891,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Peart, D.B.","contributorId":45304,"corporation":false,"usgs":true,"family":"Peart","given":"D.B.","email":"","affiliations":[],"preferred":false,"id":397888,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Antweiler, Ronald C. 0000-0001-5652-6034 antweil@usgs.gov","orcid":"https://orcid.org/0000-0001-5652-6034","contributorId":1481,"corporation":false,"usgs":true,"family":"Antweiler","given":"Ronald","email":"antweil@usgs.gov","middleInitial":"C.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":397889,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Alpers, Charles N. 0000-0001-6945-7365 cnalpers@usgs.gov","orcid":"https://orcid.org/0000-0001-6945-7365","contributorId":411,"corporation":false,"usgs":true,"family":"Alpers","given":"Charles","email":"cnalpers@usgs.gov","middleInitial":"N.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":397893,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70185194,"text":"70185194 - 2001 - Water sustainability -- Science or management?","interactions":[],"lastModifiedDate":"2017-03-16T10:43:59","indexId":"70185194","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3825,"text":"Groundwater","active":true,"publicationSubtype":{"id":10}},"title":"Water sustainability -- Science or management?","docAbstract":"<p>No abstract available&nbsp;</p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1745-6584.2001.tb02352.x","usgsCitation":"Wood, W., 2001, Water sustainability -- Science or management?: Groundwater, v. 39, no. 5, p. 641-641, https://doi.org/10.1111/j.1745-6584.2001.tb02352.x.","productDescription":"1 p. ","startPage":"641","endPage":"641","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":337709,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"5","noUsgsAuthors":false,"publicationDate":"2005-12-13","publicationStatus":"PW","scienceBaseUri":"58cba41fe4b0849ce97dc770","contributors":{"authors":[{"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":684702,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70185193,"text":"70185193 - 2001 - In situ spectroscopic and solution analyses of the reductive dissolution of Mn02 by Fe(II)","interactions":[],"lastModifiedDate":"2018-12-03T08:40:13","indexId":"70185193","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"In situ spectroscopic and solution analyses of the reductive dissolution of Mn02 by Fe(II)","docAbstract":"<p><span>The reductive dissolution of MnO</span><sub>2</sub><span> by Fe(II) under conditions simulating acid mine drainage (pH 3, 100 mM SO</span><sub>4</sub><sup>2</sup><sup>-</sup><span>) was investigated by utilizing a flow-through reaction cell and synchrotron X-ray absorption spectroscopy. This configuration allows collection of in situ, real-time X-ray absorption near-edge structure (XANES) spectra and bulk solution samples. Analysis of the solution chemistry suggests that the reaction mechanism changed (decreased reaction rate) as MnO</span><sub>2</sub><span> was reduced and Fe(III) precipitated, primarily as ferrihydrite. Simultaneously, we observed an additional phase, with the local structure of jacobsite (MnFe</span><sub>2</sub><span>O</span><sub>4</sub><span>), in the Mn XANES spectra of reactants and products. The X-ray absorbance of this intermediate phase increased during the experiment, implying an increase in concentration. The presence of this phase, which probably formed as a surface coating, helps to explain the reduced rate of dissolution of manganese(IV) oxide. In natural environments affected by acid mine drainage, the formation of complex intermediate solid phases on mineral surfaces undergoing reductive dissolution may likewise influence the rate of release of metals to solution.</span></p>","language":"English","publisher":"American Chemical Society","doi":"10.1021/es001356d","usgsCitation":"Villinski, J.E., O’Day, P.A., Corley, T.L., and Conklin, M.H., 2001, In situ spectroscopic and solution analyses of the reductive dissolution of Mn02 by Fe(II): Environmental Science & Technology, v. 35, no. 6, p. 1157-1163, https://doi.org/10.1021/es001356d.","productDescription":"7 p. ","startPage":"1157","endPage":"1163","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":337707,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"35","issue":"6","noUsgsAuthors":false,"publicationDate":"2001-02-16","publicationStatus":"PW","scienceBaseUri":"58cba41fe4b0849ce97dc772","contributors":{"authors":[{"text":"Villinski, John E.","contributorId":189392,"corporation":false,"usgs":false,"family":"Villinski","given":"John","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":684698,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O’Day, Peggy A.","contributorId":189393,"corporation":false,"usgs":false,"family":"O’Day","given":"Peggy","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":684699,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Corley, Timothy L.","contributorId":189394,"corporation":false,"usgs":false,"family":"Corley","given":"Timothy","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":684700,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Conklin, Martha H.","contributorId":189395,"corporation":false,"usgs":false,"family":"Conklin","given":"Martha","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":684701,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70023718,"text":"70023718 - 2001 - Effect of natural gas exsolution on specific storage in a confined aquifer undergoing water level decline","interactions":[],"lastModifiedDate":"2022-10-17T15:34:57.210806","indexId":"70023718","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"Effect of natural gas exsolution on specific storage in a confined aquifer undergoing water level decline","docAbstract":"<p>The specific storage of a porous medium, a function of the compressibility of the aquifer material and the fluid within it, is essentially constant under normal hydrologic conditions. Gases dissolved in ground water can increase the effective specific storage of a confined aquifer, however, during water level declines. This causes a reduction in pore pressure that lowers the gas solubility and results in exsolution. The exsolved gas then displaces water from storage, and the specific storage increases because gas compressibility is typically much greater than that of water or aquifer material.</p><p>This work describes the effective specific storage of a confined aquifer exsolving dissolved gas as a function of hydraulic head and the dimensionless Henry's law constant for the gas. This relation is applied in a transient simulation of ground water discharge from a confined aquifer system to a collapsed salt mine in the Genesee Valley in western New York. Results indicate that exsolution of gas significantly increased the effective specific storage in the aquifer system, thereby decreasing the water level drawdown.</p>","language":"English","publisher":"National Groundwater Association","doi":"10.1111/j.1745-6584.2001.tb02340.x","issn":"0017467X","usgsCitation":"Yager, R.M., and Fountain, J., 2001, Effect of natural gas exsolution on specific storage in a confined aquifer undergoing water level decline: Ground Water, v. 39, no. 4, p. 517-525, https://doi.org/10.1111/j.1745-6584.2001.tb02340.x.","productDescription":"9 p.","startPage":"517","endPage":"525","costCenters":[],"links":[{"id":232149,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"39","issue":"4","noUsgsAuthors":false,"publicationDate":"2005-12-13","publicationStatus":"PW","scienceBaseUri":"505a05f5e4b0c8380cd5104e","contributors":{"authors":[{"text":"Yager, R. M.","contributorId":8069,"corporation":false,"usgs":true,"family":"Yager","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":398545,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fountain, J.C.","contributorId":43104,"corporation":false,"usgs":true,"family":"Fountain","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":398546,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70176091,"text":"70176091 - 2001 - Online bibliographic sources in hydrology","interactions":[],"lastModifiedDate":"2016-08-25T12:28:06","indexId":"70176091","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Online bibliographic sources in hydrology","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Information and the professional scientist and engineer","largerWorkSubtype":{"id":15,"text":"Monograph"},"language":"English","publisher":"Haworth Information Press","publisherLocation":"Binghamton, NY","usgsCitation":"Haworth Information Press, 2001, Online bibliographic sources in hydrology, chap. <i>of</i> Information and the professional scientist and engineer.","costCenters":[],"links":[{"id":327846,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57c016c9e4b0f2f0ceb8735b"}
,{"id":70023677,"text":"70023677 - 2001 - Trends in total phosphorus and total nitrogen concentrations of tributaries to the Swan - Canning Estuary, 1987 to 1998","interactions":[],"lastModifiedDate":"2012-03-12T17:20:03","indexId":"70023677","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"Trends in total phosphorus and total nitrogen concentrations of tributaries to the Swan - Canning Estuary, 1987 to 1998","docAbstract":"Temporal wet-season trends from 1987 to 1998 of total N and total P concentrations (TN and TP, respectively) in 14 tributaries to the Swan-Canning Estuary in Western Australia were evaluated using the Mann-Kendall or Seasonal kendall tests. Six of the catchments drained clay soils primarily on the Darling Plateau, which borders the sandy coastal plain on the east; two rural catchments drained the coastal plain; and six urban catchments drained the coastal plain. Generally, TN and TP were lower in tributaries draining clay soils than in tributaries draining siliceous sandy soils. Annual median TN and TP were relatively constant and no trends were detected in tributaries draining clay soils. TN and TP were higher (median TN = 1.6 and TP = 0.1 mg 1-1) and more variable temporally in tributaries draining the coastal plain. Statistically significant (?? < 0.01) TN trends were detected in 50% of the urban coastal plain tributaries and most were decreasing (-0.07 to +0.53 mg 1-1 year-1). Decreasing TP trends were detected at the two rural coastal plain tributaries and two of the urban drains (-0.01 to 0.15 mg 1-1 year-1 over periods from 5 to 12 years). Flow adjustment of TN and TP was responsible for removing trends in the raw data at some sites. The inter-annual variability of TN and TP of coastal plain tributaries was also related to the proximity of the water table to the land surface, which in turn was related to the annual precipitation. Fixed-interval sampling may be able to detect TN and TP changes associated with the implementation of management strategies in sandy coastal plain catchments. Tributary sampling during rainstorms and continuous monitoring of discharge are needed to better define processes controlling nutrient flux and concentration variability, and to detect trends in the urban catchments and the clay soil catchments, primarily those draining the Darling Plateau. Copyright ?? 2001 John Wiley and Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.300","issn":"08856087","usgsCitation":"Donohue, R., Davidson, W., Peters, N., Nelson, S., and Jakowyna, B., 2001, Trends in total phosphorus and total nitrogen concentrations of tributaries to the Swan - Canning Estuary, 1987 to 1998: Hydrological Processes, v. 15, no. 13, p. 2411-2434, https://doi.org/10.1002/hyp.300.","startPage":"2411","endPage":"2434","numberOfPages":"24","costCenters":[],"links":[{"id":207307,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.300"},{"id":232145,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"13","noUsgsAuthors":false,"publicationDate":"2001-09-05","publicationStatus":"PW","scienceBaseUri":"505bb816e4b08c986b32767b","contributors":{"authors":[{"text":"Donohue, R.","contributorId":20925,"corporation":false,"usgs":true,"family":"Donohue","given":"R.","email":"","affiliations":[],"preferred":false,"id":398416,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Davidson, W.A.","contributorId":107065,"corporation":false,"usgs":true,"family":"Davidson","given":"W.A.","email":"","affiliations":[],"preferred":false,"id":398419,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Peters, N.E.","contributorId":33332,"corporation":false,"usgs":true,"family":"Peters","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":398417,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nelson, S.","contributorId":18138,"corporation":false,"usgs":true,"family":"Nelson","given":"S.","affiliations":[],"preferred":false,"id":398415,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Jakowyna, B.","contributorId":80037,"corporation":false,"usgs":true,"family":"Jakowyna","given":"B.","email":"","affiliations":[],"preferred":false,"id":398418,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70023663,"text":"70023663 - 2001 - Nutrient transport to the Swan - Canning Estuary, Western Australia","interactions":[],"lastModifiedDate":"2012-03-12T17:20:12","indexId":"70023663","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"Nutrient transport to the Swan - Canning Estuary, Western Australia","docAbstract":"Catchment nutrient availability in Western Australia is primarily controlled by the disposal of animal waste and the type and rate of fertilizer application, particularly on the relatively narrow (~25 km wide), sandy coastal plain. Nitrogen (N) and phosphorous (P) concentrations and fluxes during the wet season of 15 tributaries, including four urban drains to the Swan-Canning Estuary, were evaluated from 1986 to 1992 and additionally concentrations only were evaluated throughout the year from 1993 to 1996. Concentrations of filtered reactive P (FRP) and total P (TP) were generally low, with the volume-weighted means for all sites being 0.06 mg 1-1 and 0.12 mg 1-1 respectively. The urban drains had higher TP concentrations (volume-weighted mean of 0.21 mg 1-1) than the streams (0.12 mg 1-1), with the high concentrations associated with particulate matter. Total inorganic N (TIN, NH4N plus NO3N) and total N (TN), which is of interest to eutrophic status of the N-limited estuary, were likewise low, compared with other developed areas having a similar climate. Both TIN and TN were higher in the urban drains (0.76 mg 1-1 and 1.5 mg 1-1 respectively) than the streams (0.31 mg 1-1 and 1.2 mg 1-1 respectively). The Avon River, which drains 98.5% of the 121 000 km2 catchment area, contributes most of the N (0.03 kg ha-1 year-1 or 65%) and a high percentage of the P (<0.01 kg ha-1 year-1 or 32%) to the estuaries. The Avon River nutrient fluxes are much less than other tributaries closer to the estuary. The coastal plain receives significantly higher rainfall (1,200 mm year-1) and has more intense horticulture and animal production than inland areas (<300 mm year-1). Annual rainfall is seasonal, occuring primarily from May through December. The surficial aquifers on the coastal plain generally are sandy with a low nutrient retention capacity, and rapidly transmit soluble and colloidal material in subsurface flow. Ellen Brook, on the coastal plain, drains pastures treated with superphosphate and has the highest FRP (0.51 mg 1-1), TP (0.7 mg 1-1) and TN (2.1 mg 1-1) of any tributary to the estuary. The coastal plain is also undergoing urbanization, particularly in areas adjacent to the estuary. Nutrients are subsequently available for transport during the onset of seasonal wet weather. Perennial baseflow from urban areas is an important source of nutrients. Water yield from the urban areas was high, being as much as 50% of annual rainfall. The timing of the nutrients delivered by the tributaries may be an important control on estuarine ecology. Copyright ?? 2001 John Wiley and Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.304","issn":"08856087","usgsCitation":"Peters, N., and Donohue, R., 2001, Nutrient transport to the Swan - Canning Estuary, Western Australia: Hydrological Processes, v. 15, no. 13, p. 2555-2577, https://doi.org/10.1002/hyp.304.","startPage":"2555","endPage":"2577","numberOfPages":"23","costCenters":[],"links":[{"id":207522,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.304"},{"id":232541,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"13","noUsgsAuthors":false,"publicationDate":"2001-09-05","publicationStatus":"PW","scienceBaseUri":"505a699ae4b0c8380cd73dfc","contributors":{"authors":[{"text":"Peters, N.E.","contributorId":33332,"corporation":false,"usgs":true,"family":"Peters","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":398374,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Donohue, R.","contributorId":20925,"corporation":false,"usgs":true,"family":"Donohue","given":"R.","email":"","affiliations":[],"preferred":false,"id":398373,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70023609,"text":"70023609 - 2001 - Infiltration of late Palaeozoic evaporative brines in the reelfoot rift: A possible salt source for Illinois Basin formation waters and MVT mineralizing fluids","interactions":[],"lastModifiedDate":"2013-03-20T20:03:42","indexId":"70023609","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3042,"text":"Petroleum Geoscience","active":true,"publicationSubtype":{"id":10}},"title":"Infiltration of late Palaeozoic evaporative brines in the reelfoot rift: A possible salt source for Illinois Basin formation waters and MVT mineralizing fluids","docAbstract":"Salinities and homogenization temperatures of fluid inclusions in Mississippi Valley-type (MVT) deposits provide important insights into the regional hydrology of the Illinois basin/Reelfoot rift system in late Palaeozoic time. Although the thermal regime of this basin system has been plausibly explained, the origin of high salinities in the basin fluids remains enigmatic. Topographically driven flow appears to have been essential in forming these MVT districts, as well as many other districts worldwide. However, this type of flow is recharged by fresh water making it difficult to account for the high salinities of the mineralizing fluids over extended time periods. Results of numerical experiments carried out in this study provide a possible solution to the salinity problem presented by the MVT zinc-lead and fluorite districts at the margins of the basin system. Evaporative concentration of surface water and subsequent infiltration into the subsurface are proposed to account for large volumes of brine that are ultimately responsible for mineralization of these districts. This study demonstrates that under a range of geologically reasonable conditions, brine infiltration into an aquifer in the deep subsurface can coexist with topographically driven flow. Infiltration combined with regional flow and local magmatic heat sources in the Reelfoot rift explain the brine concentrations as well as the temperatures observed in the Southern Illinois and Upper Mississippi Valley districts.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Petroleum Geoscience","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1144/petgeo.7.3.269","issn":"13540793","usgsCitation":"Rowan, E., and De Marsily, G., 2001, Infiltration of late Palaeozoic evaporative brines in the reelfoot rift: A possible salt source for Illinois Basin formation waters and MVT mineralizing fluids: Petroleum Geoscience, v. 7, no. 3, p. 269-279, https://doi.org/10.1144/petgeo.7.3.269.","startPage":"269","endPage":"279","numberOfPages":"11","costCenters":[],"links":[{"id":269822,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1144/petgeo.7.3.269"},{"id":232336,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"3","noUsgsAuthors":false,"publicationDate":"2022-06-06","publicationStatus":"PW","scienceBaseUri":"505a3af5e4b0c8380cd620f2","contributors":{"authors":[{"text":"Rowan, E. L. 0000-0001-5753-6189","orcid":"https://orcid.org/0000-0001-5753-6189","contributorId":34921,"corporation":false,"usgs":true,"family":"Rowan","given":"E. L.","affiliations":[],"preferred":false,"id":398196,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"De Marsily, G.","contributorId":8262,"corporation":false,"usgs":true,"family":"De Marsily","given":"G.","email":"","affiliations":[],"preferred":false,"id":398195,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70178174,"text":"70178174 - 2001 - Assessment of selenium effects in lotic ecosystems","interactions":[],"lastModifiedDate":"2016-11-04T13:02:32","indexId":"70178174","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1480,"text":"Ecotoxicology and Environmental Safety","active":true,"publicationSubtype":{"id":10}},"title":"Assessment of selenium effects in lotic ecosystems","docAbstract":"<p><span>The selenium literature has grown substantially in recent years to encompass new information in a variety of areas. Correspondingly, several different approaches to establishing a new water quality criterion for selenium have been proposed since establishment of the national water quality criterion in 1987. Diverging viewpoints and interpretations of the selenium literature have lead to opposing perspectives on issues such as establishing a national criterion based on a sediment-based model, using hydrologic units to set criteria for stream reaches, and applying lentic-derived effects to lotic environments. This Commentary presents information on the lotic verse lentic controversy. Recently, an article was published that concluded that no adverse effects were occurring in a cutthroat trout population in a coldwater river with elevated selenium concentrations (C. J. Kennedy, L. E. McDonald, R. Loveridge, and M. M. Strosher, 2000, </span><i>Arch. Environ. Contam. Toxicol.</i><span> 39, 46–52). This article has added to the controversy rather than provided further insight into selenium toxicology. Information, or rather missing information, in the article has been critically reviewed and problems in the interpretations are discussed.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1006/eesa.2001.2111","usgsCitation":"Hamilton, S., and Palace, V.P., 2001, Assessment of selenium effects in lotic ecosystems: Ecotoxicology and Environmental Safety, v. 50, no. 3, p. 161-166, https://doi.org/10.1006/eesa.2001.2111.","productDescription":"6 p.","startPage":"161","endPage":"166","costCenters":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"links":[{"id":330767,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"50","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"581d9e2ce4b0dee4cc90cbd1","contributors":{"authors":[{"text":"Hamilton, Steven J.","contributorId":174108,"corporation":false,"usgs":false,"family":"Hamilton","given":"Steven J.","affiliations":[],"preferred":false,"id":653135,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Palace, Vince P.","contributorId":176210,"corporation":false,"usgs":false,"family":"Palace","given":"Vince","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":653136,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70022718,"text":"70022718 - 2001 - Simulation of a semi-permanent wetland basin in the Cottonwood Lake area, east-central North Dakota","interactions":[],"lastModifiedDate":"2012-03-12T17:20:37","indexId":"70022718","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Simulation of a semi-permanent wetland basin in the Cottonwood Lake area, east-central North Dakota","docAbstract":"A coupled surface/subsurface hydrologic model was developed to examine the effects of climatic conditions on stage fluctuations within a semi-permanent wetland located in the Prairie Pothole region of east-central North Dakota. Model calibration was accomplished using data collected from 1981 to 1996 to encompass extreme climatic conditions. Results show that the processes of precipitation largely control wetland stage. Surface runoff produces short duration, high magnitude flows typically associated with spring thaw. On the other hand, groundwater contribution provides flows smaller in magnitude but higher in duration and these become increasingly important with respect to wetland stage during extended periods of drought and flood. Peak groundwater fluxes lag one-to-two months behind peak recharge rates and therefore occur predominantly during the month of June. Groundwater fluxes then attenuate slowly for the remainder of the year to the point where water may move out of the wetland and into the underlying aquifer during the fall and winter months. Despite an over simplification of the complex groundwater component of the wetland system it was found that this modeling approach was able to predict system response over 15 years, under extreme climatic conditions and with relatively easily attainable data input.","largerWorkTitle":"Proceedings of the 2001 Wetlands Engineering and River Restoration Conference","conferenceTitle":"Proceedings of the 2001 Wetlands Engineering and River Restoration Conference","conferenceDate":"27 August 2001 through 31 August 2001","conferenceLocation":"Reno, NV","language":"English","isbn":"0784405816","usgsCitation":"Carroll, R., Pohll, G., Tracy, J., and Winter, T.C., 2001, Simulation of a semi-permanent wetland basin in the Cottonwood Lake area, east-central North Dakota, <i>in</i> Proceedings of the 2001 Wetlands Engineering and River Restoration Conference, Reno, NV, 27 August 2001 through 31 August 2001, p. 1341-1351.","startPage":"1341","endPage":"1351","numberOfPages":"11","costCenters":[],"links":[{"id":233886,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b900ce4b08c986b3192bb","contributors":{"editors":[{"text":"Hayes D.F.Hayes D.F.","contributorId":128356,"corporation":true,"usgs":false,"organization":"Hayes D.F.Hayes D.F.","id":536483,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Carroll, R.W.H.","contributorId":86148,"corporation":false,"usgs":true,"family":"Carroll","given":"R.W.H.","email":"","affiliations":[],"preferred":false,"id":394651,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Pohll, G.M.","contributorId":65261,"corporation":false,"usgs":true,"family":"Pohll","given":"G.M.","email":"","affiliations":[],"preferred":false,"id":394650,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tracy, J.C.","contributorId":21734,"corporation":false,"usgs":true,"family":"Tracy","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":394648,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Winter, T. C.","contributorId":23485,"corporation":false,"usgs":true,"family":"Winter","given":"T.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":394649,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70023605,"text":"70023605 - 2001 - The concept of hydrologic landscapes","interactions":[],"lastModifiedDate":"2022-12-20T18:30:52.645765","indexId":"70023605","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"The concept of hydrologic landscapes","docAbstract":"Hydrologic landscapes are multiples or variations of fundamental hydrologic landscape units. A fundamental hydrologic landscape unit is defined on the basis of land-surface form, geology, and climate. The basic land-surface form of a fundamental hydrologic landscape unit is an upland separated from a lowland by an intervening steeper slope. Fundamental hydrologic landscape units have a complete hydrologic system consisting of surface runoff, ground-water flow, and interaction with atmospheric water. By describing actual landscapes in terms of land-surface slope, hydraulic properties of soils and geologic framework, and the difference between precipitation and evapotranspiration, the hydrologic system of actual landscapes can be conceptualized in a uniform way. This conceptual framework can then be the foundation for design of studies and data networks, syntheses of information on local to national scales, and comparison of process research across small study units in a variety of settings. The Crow Wing River watershed in central Minnesota is used as an example of evaluating stream discharge in the context of hydrologic landscapes. Lake-research watersheds in Wisconsin, Minnesota, North Dakota, and Nebraska are used as an example of using the hydrologic-landscapes concept to evaluate the effect of ground water on the degree of mineralization and major-ion chemistry of lakes that lie within ground-water flow systems.","language":"English","publisher":"American Water Resources Association","doi":"10.1111/j.1752-1688.2001.tb00973.x","issn":"1093474X","usgsCitation":"Winter, T.C., 2001, The concept of hydrologic landscapes: Journal of the American Water Resources Association, v. 37, no. 2, p. 335-349, https://doi.org/10.1111/j.1752-1688.2001.tb00973.x.","productDescription":"15 p.","startPage":"335","endPage":"349","costCenters":[],"links":[{"id":232260,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Minnesota, Nebraska, North Dakota, Wisconsin","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"MultiPolygon\",\"coordinates\":[[[[-91.217706,43.50055],[-96.453049,43.500415],[-96.452948,45.268925],[-96.835451,45.586129],[-96.587093,45.816445],[-96.639066,45.935318],[-104.045443,45.94531],[-104.048807,48.933636],[-95.153711,48.998903],[-95.153314,49.384358],[-94.878454,49.333193],[-94.640803,48.741171],[-93.818375,48.534442],[-92.984963,48.623731],[-92.634931,48.542873],[-92.698824,48.494892],[-92.341207,48.23248],[-92.066269,48.359602],[-91.542512,48.053268],[-90.88548,48.245784],[-90.703702,48.096009],[-89.489226,48.014528],[-90.735927,47.624343],[-92.058888,46.809938],[-92.025789,46.710839],[-91.781928,46.697604],[-90.880358,46.957661],[-90.78804,46.844886],[-90.920813,46.637432],[-90.327548,46.550262],[-89.929158,46.29975],[-88.141001,45.930608],[-88.13364,45.823128],[-87.831442,45.714938],[-87.887828,45.358122],[-87.647454,45.345232],[-87.72796,45.207956],[-87.59188,45.094689],[-87.983065,44.72073],[-87.970702,44.530292],[-87.021088,45.296541],[-87.73063,43.893862],[-87.910172,43.236634],[-87.800477,42.49192],[-90.614589,42.508053],[-91.078097,42.806526],[-91.177728,43.118733],[-91.062562,43.243165],[-91.217706,43.50055]]],[[[-104.053249,41.001406],[-104.053127,43.000585],[-98.568936,42.998537],[-98.042011,42.767316],[-97.834172,42.868794],[-97.256752,42.853913],[-96.409408,42.487595],[-95.850188,41.184798],[-95.885349,40.721093],[-95.336242,40.019104],[-102.051744,40.003078],[-102.051614,41.002377],[-104.053249,41.001406]]],[[[-86.880572,45.331467],[-86.956192,45.351179],[-86.82177,45.427602],[-86.880572,45.331467]]]]},\"properties\":{\"name\":\"Minnesota\",\"nation\":\"USA  \"}}]}","volume":"37","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"505baa53e4b08c986b3227d1","contributors":{"authors":[{"text":"Winter, T. C.","contributorId":23485,"corporation":false,"usgs":true,"family":"Winter","given":"T.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":398187,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70024043,"text":"70024043 - 2001 - The national stream quality accounting network: A flux-basedapproach to monitoring the water quality of large rivers","interactions":[],"lastModifiedDate":"2012-03-12T17:20:20","indexId":"70024043","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"The national stream quality accounting network: A flux-basedapproach to monitoring the water quality of large rivers","docAbstract":"Estimating the annual mass flux at a network of fixed stations is one approach to characterizing water quality of large rivers. The interpretive context provided by annual flux includes identifying source and sink areas for constituents and estimating the loadings to receiving waters, such as reservoirs or the ocean. Since 1995, the US Geological Survey's National Stream Quality Accounting Network (NASQAN) has employed this approach at a network of 39 stations in four of the largest river basins of the USA: The Mississippi, the Columbia, the Colorado and the Rio Grande. In this paper, the design of NASQAN is described and its effectiveness at characterizing the water quality of these rivers is evaluated using data from the first 3 years of operation. A broad range of constituents was measured by NASQAN, including trace organic and inorganic chemicals, major ions, sediment and nutrients. Where possible, a regression model relating concentration to discharge and season was used to interpolate between chemical observations for flux estimation. For water-quality network design, the most important finding from NASQAN was the importance of having a specific objective (that is, estimating annual mass flux) and, from that, an explicitly stated data analysis strategy, namely the use of regression models to interpolate between observations. The use of such models aided in the design of sampling strategy and provided a context for data review. The regression models essentially form null hypotheses for concentration variation that can be evaluated by the observed data. The feedback between network operation and data collection established by the hypothesis tests places the water-quality network on a firm scientific footing.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.205","issn":"08856087","usgsCitation":"Hooper, R.P., Aulenbach, B., and Kelly, V., 2001, The national stream quality accounting network: A flux-basedapproach to monitoring the water quality of large rivers: Hydrological Processes, v. 15, no. 7, p. 1089-1106, https://doi.org/10.1002/hyp.205.","startPage":"1089","endPage":"1106","numberOfPages":"18","costCenters":[],"links":[{"id":207041,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.205"},{"id":231600,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"7","noUsgsAuthors":false,"publicationDate":"2001-05-25","publicationStatus":"PW","scienceBaseUri":"505badfbe4b08c986b323e9c","contributors":{"authors":[{"text":"Hooper, R. P.","contributorId":26321,"corporation":false,"usgs":true,"family":"Hooper","given":"R.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":399785,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aulenbach, Brent T.","contributorId":62766,"corporation":false,"usgs":true,"family":"Aulenbach","given":"Brent T.","affiliations":[],"preferred":false,"id":399786,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kelly, V.J.","contributorId":14009,"corporation":false,"usgs":true,"family":"Kelly","given":"V.J.","email":"","affiliations":[],"preferred":false,"id":399784,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70023559,"text":"70023559 - 2001 - Evaluation of mixed-population flood-frequency analysis","interactions":[],"lastModifiedDate":"2012-03-12T17:20:02","indexId":"70023559","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"Evaluation of mixed-population flood-frequency analysis","docAbstract":"A mixed population of flood flows was shown to cause quality-of-fit problems if a single-population flood-frequency distribution was used to describe the flood data. The three populations in this mix were \"ordinary,\" tropical cyclone, and ice-jam-release floods. Parametric descriptions of the single and separated flood populations were evaluated using probability-plot correlation-coefficient tests. These tests quantified how well the flood-probability distributions agreed with plotting-position descriptions of the data and quantified the differences due to the mixed-population analysis. High outliers caused the high skewness found in the single- population analyses. The tropical cyclone component was underestimated by single-population analyses at gauging stations in Massachusetts that had little data.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Hydrologic Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1061/(ASCE)1084-0699(2001)6:1(62)","issn":"10840699","usgsCitation":"Murphy, P., 2001, Evaluation of mixed-population flood-frequency analysis: Journal of Hydrologic Engineering, v. 6, no. 1, p. 62-70, https://doi.org/10.1061/(ASCE)1084-0699(2001)6:1(62).","startPage":"62","endPage":"70","numberOfPages":"9","costCenters":[],"links":[{"id":207302,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)1084-0699(2001)6:1(62)"},{"id":232138,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0c9be4b0c8380cd52c06","contributors":{"authors":[{"text":"Murphy, P.J.","contributorId":91903,"corporation":false,"usgs":true,"family":"Murphy","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":398038,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70024009,"text":"70024009 - 2001 - Chemical and isotopic evidence of nitrogen transformation in the Mississippi River, 1997-98","interactions":[],"lastModifiedDate":"2018-12-03T10:10:10","indexId":"70024009","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"Chemical and isotopic evidence of nitrogen transformation in the Mississippi River, 1997-98","docAbstract":"<p>Nitrate (NO3) and other nutrients discharged by the Mississippi River are suspected of causing a zone of depleted dissolved oxygen (hypoxic zone) in the Gulf of Mexico each summer. The hypoxic zone may have an adverse affect on aquatic life and commercial fisheries. The amount of NO3 delivered by the Mississippi River to the Gulf of Mexico is well documented, but the relative contributions of different sources of NO3, and the magnitude of subsequent in-stream transformations of NO3, are not well understood. Forty-two water samples collected in 1997 and 1998 at eight stations located either on the Mississippi River or its major tributaries were analysed for NO3, total nitrogen (N), atrazine, chloride concentrations and NO3 stable isotopes (δ15N and δ18O). These data are used to assess the magnitude and nature of in-stream N transformation and to determine if the δ15N and δ18O of NO3 provide information about NO3 sources and transformation processes in a large river system (drainage area 2 900 000 km2) that would otherwise be unavailable using concentration and discharge data alone. Results from 42 samples indicate that the δ15N and δ18O ratios between sites on the Mississippi River and its tributaries are somewhat distinctive, and vary with season and discharge rate. Of particular interest are two nearly Lagrangian sample sets, in which samples from the Mississippi River at St Francisville, LA, are compared with samples collected from the Ohio River at Grand Chain, II, and the Mississippi River at Thebes, IL. In both Lagrangian sets, mass-balance calculations indicate only a small amount of in-stream N loss. The stable isotope data from the samples suggest that in-stream N assimilation and not denitrification accounts for most of the N loss in the lower Mississippi River during the spring and early summer months.</p>","language":"English","publisher":"Wiley","doi":"10.1002/hyp.214","issn":"08856087","usgsCitation":"Battaglin, W.A., Kendall, C., Chang, C.C., Silva, S.R., and Campbell, K., 2001, Chemical and isotopic evidence of nitrogen transformation in the Mississippi River, 1997-98: Hydrological Processes, v. 15, no. 7, p. 1285-1300, https://doi.org/10.1002/hyp.214.","productDescription":"16 p.","startPage":"1285","endPage":"1300","costCenters":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":207092,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.214"},{"id":231711,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Mississippi River","volume":"15","issue":"7","noUsgsAuthors":false,"publicationDate":"2001-05-25","publicationStatus":"PW","scienceBaseUri":"5059f546e4b0c8380cd4c14a","contributors":{"authors":[{"text":"Battaglin, William A. 0000-0001-7287-7096 wbattagl@usgs.gov","orcid":"https://orcid.org/0000-0001-7287-7096","contributorId":1527,"corporation":false,"usgs":true,"family":"Battaglin","given":"William","email":"wbattagl@usgs.gov","middleInitial":"A.","affiliations":[{"id":191,"text":"Colorado Water Science Center","active":true,"usgs":true}],"preferred":true,"id":399673,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kendall, Carol 0000-0002-0247-3405 ckendall@usgs.gov","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":1462,"corporation":false,"usgs":true,"family":"Kendall","given":"Carol","email":"ckendall@usgs.gov","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":399675,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Chang, Cecily C.Y.","contributorId":68032,"corporation":false,"usgs":true,"family":"Chang","given":"Cecily","email":"","middleInitial":"C.Y.","affiliations":[],"preferred":false,"id":399677,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Silva, Steven R. srsilva@usgs.gov","contributorId":3162,"corporation":false,"usgs":true,"family":"Silva","given":"Steven","email":"srsilva@usgs.gov","middleInitial":"R.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":399674,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Campbell, K.","contributorId":63351,"corporation":false,"usgs":false,"family":"Campbell","given":"K.","affiliations":[{"id":47665,"text":"St. Anthony Falls Laboratory, University of Minnesota, Minneapolis, MN, USA","active":true,"usgs":false}],"preferred":false,"id":399676,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70023271,"text":"70023271 - 2001 - Quantifying contributions to storm runoff through end-member mixing analysis and hydrologic measurements at the Panola Mountain research watershed (Georgia, USA)","interactions":[],"lastModifiedDate":"2012-03-12T17:20:14","indexId":"70023271","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"Quantifying contributions to storm runoff through end-member mixing analysis and hydrologic measurements at the Panola Mountain research watershed (Georgia, USA)","docAbstract":"The geographic sources and hydrologic flow paths of stormflow in small catchments are not well understood because of limitations in sampling methods and insufficient resolution of potential end members. To address these limitations, an extensive hydrologic dataset was collected at a 10 ha catchment at Panola Mountain research watershed near Atlanta, GA, to quantify the contribution of three geographic sources of stormflow. Samples of stream water, runoff from an outcrop, and hillslope subsurface stormflow were collected during two rainstorms in the winter of 1996, and an end-member mixing analysis model that included five solutes was developed. Runoff from the outcrop, which occupies about one-third of the catchment area, contributed 50-55% of the peak streamflow during the 2 February rainstorm, and 80-85% of the peak streamflow during the 6-7 March rainstorm; it also contributed about 50% to total streamflow during the dry winter conditions that preceded the 6-7 March storm. Riparian groundwater runoff was the largest component of stream runoff (80-100%) early during rising streamflow and throughout stream recession, and contributed about 50% to total stream runoff during the 2 February storm, which was preceded by wet winter conditions. Hillslope runoff contributed 25-30% to peak stream runoff and 15-18% to total stream runoff during both storms. The temporal response of the three runoff components showed general agreement with hydrologic measurements from the catchment during each storm. Estimates of recharge from the outcrop to the riparian aquifer that were independent of model calculations indicated that storage in the riparian aquifer could account for the volume of rain that fell on the outcrop but did not contribute to stream runoff. The results of this study generally indicate that improvements in the ability of mixing models to describe the hydrologic response accurately in forested catchments may depend on better identification, and detailed spatial and temporal characterization of the mobile waters from the principal hydrologic source areas that contribute to stream runoff. Copyright ?? 2001 John Wiley & Sons, Ltd.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.246","issn":"08856087","usgsCitation":"Burns, D.A., McDonnell, J.J., Hooper, R.P., Peters, N., Freer, J., Kendall, C., and Beven, K., 2001, Quantifying contributions to storm runoff through end-member mixing analysis and hydrologic measurements at the Panola Mountain research watershed (Georgia, USA): Hydrological Processes, v. 15, no. 10, p. 1903-1924, https://doi.org/10.1002/hyp.246.","startPage":"1903","endPage":"1924","numberOfPages":"22","costCenters":[],"links":[{"id":207572,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.246"},{"id":232634,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"10","noUsgsAuthors":false,"publicationDate":"2001-07-11","publicationStatus":"PW","scienceBaseUri":"505a91c5e4b0c8380cd8044d","contributors":{"authors":[{"text":"Burns, Douglas A. 0000-0001-6516-2869","orcid":"https://orcid.org/0000-0001-6516-2869","contributorId":29450,"corporation":false,"usgs":true,"family":"Burns","given":"Douglas","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":397098,"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":397101,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hooper, R. P.","contributorId":26321,"corporation":false,"usgs":true,"family":"Hooper","given":"R.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":397097,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Peters, N.E.","contributorId":33332,"corporation":false,"usgs":true,"family":"Peters","given":"N.E.","email":"","affiliations":[],"preferred":false,"id":397099,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Freer, J.E.","contributorId":18930,"corporation":false,"usgs":true,"family":"Freer","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":397095,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Kendall, C. 0000-0002-0247-3405","orcid":"https://orcid.org/0000-0002-0247-3405","contributorId":35050,"corporation":false,"usgs":true,"family":"Kendall","given":"C.","affiliations":[],"preferred":false,"id":397100,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Beven, K.","contributorId":25320,"corporation":false,"usgs":true,"family":"Beven","given":"K.","email":"","affiliations":[],"preferred":false,"id":397096,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":1015133,"text":"1015133 - 2001 - Simulated limnological effects of the Shasta Lake temperature control device","interactions":[],"lastModifiedDate":"2017-12-17T11:40:41","indexId":"1015133","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1547,"text":"Environmental Management","active":true,"publicationSubtype":{"id":10}},"title":"Simulated limnological effects of the Shasta Lake temperature control device","docAbstract":"<p>We estimated the effects of a temperature control device (TCD) on a suite of thermodynamic and limnological attributes for a large storage reservoir, Shasta Lake, in northern California. Shasta Dam was constructed in 1945 with a fixed-elevation penstock. The TCD was installed in 1997 to improve downstream temperatures for endangered salmonids by releasing epilimnetic waters in the winter/spring and hypolimnetic waters in the summer/fall. We calibrated a two-dimensional hydrodynamic reservoir water quality model, CE-QUAL-W2, and applied a structured design-of-experiment simulation procedure to predict the principal limnological effects of the TCD under a variety of environmental scenarios. Calibration goodness-of-fit ranged from good to poor depending on the constituent simulated, with an <i class=\"EmphasisTypeItalic \">R</i><sup>2</sup> of 0.9 for water temperature but 0.3 for phytoplankton. Although the chemical and thermal characteristics of the discharge changed markedly, the reservoir's characteristics remained relatively unchanged. Simulations showed the TCD causing an earlier onset and shorter duration of summer stratification, but no dramatic affect on Shasta's nutrient composition. Peak in-reservoir phytoplankton production may begin earlier and be stronger in the fall with the TCD, while outfall phytoplankton concentrations may be much greater in the spring. Many model predictions differed from our <i class=\"EmphasisTypeItalic \">a priori</i> expectations that had been shaped by an intensive, but limited-duration, data collection effort. Hydrologic and meteorological variables, most notably reservoir carryover storage at the beginning of the calendar year, influenced model predictions much more strongly than the TCD. Model results indicate that greater control over reservoir limnology and release quality may be gained by carefully managing reservoir volume through the year than with the TCD alone.</p>","language":"English","publisher":"Springer","doi":"10.1007/s0026702324","usgsCitation":"Bartholow, J., Hanna, R., Saito, L., Lieberman, D., and Horn, M., 2001, Simulated limnological effects of the Shasta Lake temperature control device: Environmental Management, v. 27, no. 4, p. 609-626, https://doi.org/10.1007/s0026702324.","productDescription":"18 p.","startPage":"609","endPage":"626","costCenters":[{"id":291,"text":"Fort Collins Science Center","active":true,"usgs":true}],"links":[{"id":130523,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a80e4b07f02db6493eb","contributors":{"authors":[{"text":"Bartholow, J.","contributorId":62181,"corporation":false,"usgs":true,"family":"Bartholow","given":"J.","affiliations":[],"preferred":false,"id":322291,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hanna, R.B.","contributorId":48922,"corporation":false,"usgs":true,"family":"Hanna","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":322289,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Saito, L.","contributorId":59402,"corporation":false,"usgs":true,"family":"Saito","given":"L.","email":"","affiliations":[],"preferred":false,"id":322290,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Lieberman, D.","contributorId":32396,"corporation":false,"usgs":true,"family":"Lieberman","given":"D.","email":"","affiliations":[],"preferred":false,"id":322288,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Horn, M.","contributorId":7962,"corporation":false,"usgs":true,"family":"Horn","given":"M.","affiliations":[],"preferred":false,"id":322287,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":1008202,"text":"1008202 - 2001 - Erosion and sediment delivery following removal of forest roads","interactions":[],"lastModifiedDate":"2018-03-21T14:44:55","indexId":"1008202","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1425,"text":"Earth Surface Processes and Landforms","active":true,"publicationSubtype":{"id":10}},"title":"Erosion and sediment delivery following removal of forest roads","docAbstract":"<p><span>Erosion control treatments were applied to abandoned logging roads in California, with the goal of reducing road-related sediment input to streams and restoring natural hydrologic patterns on the landscape. Treatment of stream crossings involved excavating culverts and associated road fill and reshaping streambanks. A variety of techniques were applied to road benches, which included decompacting the road surface, placing unstable road fill in more stable locations, and re-establishing natural surface drainage patterns. Following treatment and a 12-year recurrence-interval storm, some road reaches and excavated stream crossings showed evidence of mass movement failures, gullying, bank erosion and channel incision. Post-treatment erosion from excavated stream crossings was related to two variables: a surrogate for stream power (drainage area × channel gradient) and the volume of fill excavated from the channel. Post-treatment erosion on road reaches was related to four explanatory variables: method of treatment, hillslope position (upper, mid-slope or lower), date of treatment, and an interaction term (hillslope position × method of treatment). Sediment delivery from treated roads in upper, middle and lower hillslope positions was 10, 135 and 550 m</span><sup>3</sup><span> of sediment per kilometre of treated roads, respectively. In contrast, inventories of almost 500 km of forest roads in adjacent catchments indicate that untreated roads produced 1500 to 4700 m</span><sup>3</sup><span> of sediment per kilometre of road length. Erosion from 300 km of treated roads contributed less than 2 per cent of the total sediment load of Redwood Creek during the period 1978 to 1998. Although road removal treatments do not completely eliminate erosion associated with forest roads, they do substantially reduce sediment yields from abandoned logging roads.</span></p>","language":"English","publisher":"Wiley","doi":"10.1002/1096-9837(200102)26:2<175::AID-ESP174>3.0.CO;2-N","usgsCitation":"Madej, M.A., 2001, Erosion and sediment delivery following removal of forest roads: Earth Surface Processes and Landforms, v. 26, no. 2, p. 175-190, https://doi.org/10.1002/1096-9837(200102)26:2<175::AID-ESP174>3.0.CO;2-N.","productDescription":"16 p.","startPage":"175","endPage":"190","numberOfPages":"16","costCenters":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"links":[{"id":131893,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a0ee4b07f02db5fdfae","contributors":{"authors":[{"text":"Madej, Mary Ann 0000-0003-2831-3773 mary_ann_madej@usgs.gov","orcid":"https://orcid.org/0000-0003-2831-3773","contributorId":40304,"corporation":false,"usgs":true,"family":"Madej","given":"Mary","email":"mary_ann_madej@usgs.gov","middleInitial":"Ann","affiliations":[{"id":651,"text":"Western Ecological Research Center","active":true,"usgs":true}],"preferred":true,"id":317002,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70023602,"text":"70023602 - 2001 - Analysis of streambed temperatures in ephemeral channels to determine streamflow frequency and duration","interactions":[],"lastModifiedDate":"2026-02-12T16:20:25.070282","indexId":"70023602","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"Analysis of streambed temperatures in ephemeral channels to determine streamflow frequency and duration","docAbstract":"<p><span>Spatial and temporal patterns in streamflow are rarely monitored for ephemeral streams. Flashy, erosive streamflows common in ephemeral channels create a series of operational and maintenance problems, which makes it impractical to deploy a series of gaging stations along ephemeral channels. Streambed temperature is a robust and inexpensive parameter to monitor remotely, leading to the possibility of analyzing temperature patterns to estimate streamflow frequency and duration along ephemeral channels. A simulation model was utilized to examine various atmospheric and hydrological upper boundary conditions compared with a series of hypothetical temperature‐monitoring depths within the streambed. Simulation results indicate that streamflow events were distinguished from changing atmospheric conditions with greater certainty using temperatures at shallow depths (e.g., 10–20 cm) as opposed to the streambed surface. Three ephemeral streams in the American Southwest were instrumented to monitor streambed temperature for determining the accuracy of using this approach to ascertain the long‐term temporal and spatial extent of streamflow along each stream channel. Streambed temperature data were collected at the surface or at shallow depth along each stream channel, using thermistors encased in waterproof, single‐channel data loggers tethered to anchors in the channel. On the basis of comparisons with site information, such as direct field observations and upstream flow records, diurnal temperature variations successfully detected the presence and duration of streamflow for all sites.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/2000WR900271","usgsCitation":"Constantz, J., Stonestrom, D.A., Stewart, A.E., Niswonger, R., and Smith, T.R., 2001, Analysis of streambed temperatures in ephemeral channels to determine streamflow frequency and duration: Water Resources Research, v. 37, no. 2, p. 317-328, https://doi.org/10.1029/2000WR900271.","productDescription":"12 p.","startPage":"317","endPage":"328","costCenters":[{"id":465,"text":"Nevada Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":487471,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1029/2000wr900271","text":"Publisher Index Page"},{"id":232223,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eb34e4b0c8380cd48ca7","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":398178,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stonestrom, David A. 0000-0001-7883-3385 dastones@usgs.gov","orcid":"https://orcid.org/0000-0001-7883-3385","contributorId":2280,"corporation":false,"usgs":true,"family":"Stonestrom","given":"David","email":"dastones@usgs.gov","middleInitial":"A.","affiliations":[{"id":438,"text":"National Research Program - Western Branch","active":true,"usgs":true}],"preferred":true,"id":398181,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stewart, Amy E.","contributorId":22812,"corporation":false,"usgs":true,"family":"Stewart","given":"Amy","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":398179,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Niswonger, Richard G. rniswon@usgs.gov","contributorId":146549,"corporation":false,"usgs":true,"family":"Niswonger","given":"Richard G.","email":"rniswon@usgs.gov","affiliations":[],"preferred":false,"id":398177,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Smith, Tyson R.","contributorId":81959,"corporation":false,"usgs":false,"family":"Smith","given":"Tyson","middleInitial":"R.","affiliations":[],"preferred":false,"id":398180,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70174726,"text":"70174726 - 2001 - Droughts, epic droughts and droughty centuries - lessons from a California paleoclimatic record: a PACLIM 2001 meeting report","interactions":[],"lastModifiedDate":"2016-07-14T16:50:23","indexId":"70174726","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3914,"text":"Interagency Ecological Program Newsletter","active":true,"publicationSubtype":{"id":10}},"title":"Droughts, epic droughts and droughty centuries - lessons from a California paleoclimatic record: a PACLIM 2001 meeting report","docAbstract":"<p>During the early 1990s (but echoing studies by S.T. Harding at the University of California, from as early as the 1930s), several lines of paleoclimate evidence in and around the Sierra Nevada Range have provided the water community in California with some real horror stories. By studying ancient tree stumps submerged in Lake Tahoe and Tenaya Lake, stumps that were emerging from Mono Lake during its recent decline, and stumps that were exhumed in the Walker River bed during the floods of 1997, paleoclimatologists like Scott Stine of California State University, Hayward, assembled a picture of epic droughts in the central Sierra Nevada during the medieval period. These droughts had to be severe to drop water levels in the lakes and rivers low enough for the trees to grow in the first place, and then had to last for hundreds of years to explain tree-ring counts in these sizeable stumps. Worse yet, the evidence suggested at least two such epic droughts, one ending close to 1100 and the other close to 1350. These epic droughts challenged paleoclimatologists, as well as modern climatologists and hydrologists, to understand and, ultimately, to determine the likelihood that such droughts might recur in the foreseeable future. The first challenge, however, was to verify that such droughts were more than local events and as extreme as suggested. At this year&rsquo;s Pacific Climate (PACLIM) Workshop, held March 18&ndash;21, 2001, at Asilomar (Pacific Grove, Calif.), special sessions brought together scientists to compare paleoclimatic reconstructions of ancient droughts and pluvial (wet) epidodes to try to determine the nature of decadal and centennial climate fluctuations in western North America, with emphasis on California. A companion session brought together modern climatologists to report on the latest explanations (and evidence) for decadal climate variations during the instrumental era of the 20th century. PACLIM is an annual workshop that, since 1983, has brought together specialists from diverse fields, including physical, social, and biological sciences, to discuss and investigate climate and climate effects in the eastern Pacific and western America. This year&rsquo;s PACLIM was sponsored by the U.S. Geological Survey, NOAA Office of Global Programs, California Department of Water Resources, and, for the first time, the CALFED Science Program. In addition to the presentations summarized here, sessions at this year&rsquo;s PACLIM covered topics as varied as the North American monsoon system; recent economic and political effects of California&rsquo;s climate variations, including a presentation on climate and CALFED by Sam Luoma (U.S. Geological Survey, Menlo Park); and research into daily-to-seasonal weather variations.&nbsp;</p>","language":"English","publisher":"Interagency","usgsCitation":"Dettinger, M.D., 2001, Droughts, epic droughts and droughty centuries - lessons from a California paleoclimatic record: a PACLIM 2001 meeting report: Interagency Ecological Program Newsletter, v. 14, no. 3, p. 51-53.","productDescription":"3 p.","startPage":"51","endPage":"53","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":325285,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":325284,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.water.ca.gov/iep/newsletters/2001/IEPNewsletterSummer2001.pdf"}],"volume":"14","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5788b7b3e4b0d27deb386fcd","contributors":{"authors":[{"text":"Dettinger, M. D. 0000-0002-7509-7332","orcid":"https://orcid.org/0000-0002-7509-7332","contributorId":93069,"corporation":false,"usgs":false,"family":"Dettinger","given":"M.","middleInitial":"D.","affiliations":[{"id":16196,"text":"Scripps Institution of Oceanography, La Jolla, CA","active":true,"usgs":false}],"preferred":false,"id":642552,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70022797,"text":"70022797 - 2001 - Observations of Daily Temperature Patterns in the Southern Florida Everglades","interactions":[],"lastModifiedDate":"2012-03-12T17:20:04","indexId":"70022797","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Observations of Daily Temperature Patterns in the Southern Florida Everglades","docAbstract":"Temperature is an important factor affecting key hydrological and ecological processes within the subtropical wetlands of the Florida Everglades. Comprehensive measurements are being made to quantify the temporal and spatial variability of the water-temperature regime. Data collected in 2000 at a location near the central flow pathway of the ecosystem showed both daily repetitive cycles and dynamic fluctuations in response to meteorological forces. Time-series data collected at spatial intervals throughout the water column, in the air, and in the underlying plant-litter layer revealed the dynamic nature of the temperature structure, e.g., uniformly well-mixed periods, stratified conditions, inversions, changing vertical gradients, and other characteristics important to understanding ecosystem processes.","largerWorkTitle":"Proceedings of the 2001 Wetlands Engineering and River Restoration Conference","conferenceTitle":"Proceedings of the 2001 Wetlands Engineering and River Restoration Conference","conferenceDate":"27 August 2001 through 31 August 2001","conferenceLocation":"Reno, NV","language":"English","isbn":"0784405816","usgsCitation":"Schaffranek, R., and Jenter, H., 2001, Observations of Daily Temperature Patterns in the Southern Florida Everglades, <i>in</i> Proceedings of the 2001 Wetlands Engineering and River Restoration Conference, Reno, NV, 27 August 2001 through 31 August 2001, p. 679-682.","startPage":"679","endPage":"682","numberOfPages":"4","costCenters":[],"links":[{"id":233494,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6a7fe4b0c8380cd741ca","contributors":{"editors":[{"text":"Hayes D.F.Hayes D.F.","contributorId":128356,"corporation":true,"usgs":false,"organization":"Hayes D.F.Hayes D.F.","id":536485,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Schaffranek, R.W.","contributorId":61468,"corporation":false,"usgs":true,"family":"Schaffranek","given":"R.W.","affiliations":[],"preferred":false,"id":394943,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jenter, H. L.","contributorId":25167,"corporation":false,"usgs":true,"family":"Jenter","given":"H. L.","affiliations":[],"preferred":false,"id":394942,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70023374,"text":"70023374 - 2001 - Effects of Land-Cover Change, Floods, and Stream Position on Geomorphic Processes - Implications for Restoration Activities","interactions":[],"lastModifiedDate":"2012-03-12T17:20:10","indexId":"70023374","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Effects of Land-Cover Change, Floods, and Stream Position on Geomorphic Processes - Implications for Restoration Activities","docAbstract":"A geomorphic study for North Fish Creek, a northern Wisconsin tributary to Lake Superior was analyzed to determine the hydrologic and geomorphic changes caused by clear-cut logging and agricultural activity. Discharge magnitude estimated with HEC-2 for full-channel capacities indicate that modern full-channel discharges are about twice as large as pre-1946 full-channel discharges. Flood-plain deposition rates were high along the transitional main stem after European settlement. Restoration and protection activities would be most effective if focused on watershed practices to reduce runoff and on channel restoration that reduce buff and bank erosion in the upper and transitional main stems.","largerWorkTitle":"Proceedings of the 2001 Wetlands Engineering and River Restoration Conference","conferenceTitle":"Proceedings of the 2001 Wetlands Engineering and River Restoration Conference","conferenceDate":"27 August 2001 through 31 August 2001","conferenceLocation":"Reno, NV","language":"English","isbn":"0784405816","usgsCitation":"Fitzpatrick, F., 2001, Effects of Land-Cover Change, Floods, and Stream Position on Geomorphic Processes - Implications for Restoration Activities, <i>in</i> Proceedings of the 2001 Wetlands Engineering and River Restoration Conference, Reno, NV, 27 August 2001 through 31 August 2001, p. 537-550.","startPage":"537","endPage":"550","numberOfPages":"14","costCenters":[],"links":[{"id":232441,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a065ae4b0c8380cd511f9","contributors":{"editors":[{"text":"Hayes D.F.Hayes D.F.","contributorId":128356,"corporation":true,"usgs":false,"organization":"Hayes D.F.Hayes D.F.","id":536497,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Fitzpatrick, F. A. 0000-0002-9748-7075","orcid":"https://orcid.org/0000-0002-9748-7075","contributorId":61446,"corporation":false,"usgs":true,"family":"Fitzpatrick","given":"F. A.","affiliations":[],"preferred":false,"id":397444,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70023984,"text":"70023984 - 2001 - Evaluation of persistent hydrophobic organic compounds in the Columbia River Basin using semipermeable-membrane devices","interactions":[],"lastModifiedDate":"2012-03-12T17:20:02","indexId":"70023984","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"Evaluation of persistent hydrophobic organic compounds in the Columbia River Basin using semipermeable-membrane devices","docAbstract":"Persistent hydrophobic organic compounds are of concern in the Columbia River because they have been correlated with adverse effects on wildlife. We analysed samples from nine main-stem and six tributary sites throughout the Columbia River Basin (Washington and Oregon) for polychlorinated dibenzo-p-dioxins, dibenzofurans, polychlorinated biphenyls, organochlorine pesticides, and priority-pollutant polycyclic aromatic hydrocarbons. Because these compounds may have important biological consequences at aqueous concentrations well below the detection limits associated with conventional sampling methods, we used semipermeable-membrane devices to sample water and achieved parts-per-quintillion detection limits. All of these compound classes were prevalent within the basin, but concentrations of many analytes were highest in the vicinity of Portland-Vancouver, indicating that the Willamette subbasin-and perhaps the urban area in particular-is an important source of these compounds. Data collected during basin low-flow conditions in 1997 and again during basin high-flow conditions in 1998 indicate that in-stream processes such as dilution by relatively clean inflow, and flow through island hyporheic zones may be important mechanisms for attenuating dissolved concentrations of hydrophobic compounds.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.213","issn":"08856087","usgsCitation":"McCarthy, K.A., and Gale, R., 2001, Evaluation of persistent hydrophobic organic compounds in the Columbia River Basin using semipermeable-membrane devices: Hydrological Processes, v. 15, no. 7, p. 1271-1283, https://doi.org/10.1002/hyp.213.","startPage":"1271","endPage":"1283","numberOfPages":"13","costCenters":[],"links":[{"id":207199,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.213"},{"id":231938,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"15","issue":"7","noUsgsAuthors":false,"publicationDate":"2001-05-25","publicationStatus":"PW","scienceBaseUri":"505a0caae4b0c8380cd52c47","contributors":{"authors":[{"text":"McCarthy, K. A.","contributorId":107309,"corporation":false,"usgs":true,"family":"McCarthy","given":"K.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":399594,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gale, R.W.","contributorId":81653,"corporation":false,"usgs":true,"family":"Gale","given":"R.W.","email":"","affiliations":[],"preferred":false,"id":399593,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70023983,"text":"70023983 - 2001 - The behaviour of 39 pesticides in surface waters as a function of scale","interactions":[],"lastModifiedDate":"2017-01-05T11:03:32","indexId":"70023983","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","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":"The behaviour of 39 pesticides in surface waters as a function of scale","docAbstract":"A portion of applied pesticides runs off agricultural fields and is transported through surface waters. In this study, the behaviour of 39 pesticides is examined as a function of scale across 14 orders of magnitude from the field to the ocean. Data on pesticide loads in streams from two US Geological Survey programs were combined with literature data from field and watershed studies. The annual load as percent of use (LAPU) was quantified for each of the fields and watersheds and was used as the normalization factor across watersheds and compounds. The in-stream losses of each pesticide were estimated for a model stream with a 15 day travel time (similar in characteristics to the upper Mississippi River). These estimated in-stream losses agreed well with the observed changes in apparent LAPU values as a function of watershed area. In general, herbicides applied to the soil surface had the greatest LAPU values and minimal in-stream losses. Soil-incorporated herbicides had smaller LAPU values and substantial in-stream losses. Insecticides generally had LAPU values similar to the incorporated herbicides, but had more variation in their in-stream losses. On the basis of the LAPU values of the 39 pesticides as a function of watershed area, a generalized conceptual model of the movement of pesticides from the field to the ocean is suggested. The importance of considering both field runoff and in-stream losses is discussed in relation to interpreting monitoring data and making regulatory decisions.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Hydrological Processes","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1002/hyp.212","issn":"08856087","usgsCitation":"Capel, P., Larson, S., and Winterstein, T.A., 2001, The behaviour of 39 pesticides in surface waters as a function of scale: Hydrological Processes, v. 15, no. 7, p. 1251-1269, https://doi.org/10.1002/hyp.212.","productDescription":"19 p.","startPage":"1251","endPage":"1269","costCenters":[],"links":[{"id":231902,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":207182,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1002/hyp.212"}],"volume":"15","issue":"7","noUsgsAuthors":false,"publicationDate":"2001-05-25","publicationStatus":"PW","scienceBaseUri":"505ba9e4e4b08c986b3225ad","contributors":{"authors":[{"text":"Capel, P. D. 0000-0003-1620-5185","orcid":"https://orcid.org/0000-0003-1620-5185","contributorId":95498,"corporation":false,"usgs":true,"family":"Capel","given":"P. D.","affiliations":[],"preferred":false,"id":399592,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Larson, S.J.","contributorId":17641,"corporation":false,"usgs":true,"family":"Larson","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":399590,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Winterstein, T. A.","contributorId":25156,"corporation":false,"usgs":true,"family":"Winterstein","given":"T.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":399591,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70023882,"text":"70023882 - 2001 - Methanogenic biodegradation of charcoal production wastes in groundwater at Kingsford, Michigan, USA","interactions":[],"lastModifiedDate":"2020-02-24T06:19:17","indexId":"70023882","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1934,"text":"IAHS-AISH Publication","active":true,"publicationSubtype":{"id":10}},"title":"Methanogenic biodegradation of charcoal production wastes in groundwater at Kingsford, Michigan, USA","docAbstract":"A house exploded in the City of Kingsford, Michigan USA. The explosion was caused by CH4 that leaked into the basement from the surrounding soil. Evidence suggests that biodegradation of products from the distillation and spillage at or near a former wood carbonization plant site was the major source of CH4 and CO2 in the groundwater system. The plant area is directly upgradient from deep groundwater, samples of which are green-yellow in colour, have a very strong odour of burnt wood, contain high concentrations of mononuclear aromatic and phenolic compounds, and extremely high concentrations of volatile fatty acids. The majority of the dissolved compounds in these groundwater samples have been shown, using laboratory microcosms, to be anaerobically biodegradable to CH4 and CO2. The biodegradable compounds, and the amounts of CH4 and CO2 produced in the microcosms, are consistent with observations from field samples.","language":"English","publisher":"IAHS-AISH Publication","issn":"01447815","usgsCitation":"Michael, G.E., Warren, E., and Westjohn, D., 2001, Methanogenic biodegradation of charcoal production wastes in groundwater at Kingsford, Michigan, USA: IAHS-AISH Publication, no. 269, p. 303-310.","productDescription":"8 p.","startPage":"303","endPage":"310","numberOfPages":"8","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":231624,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Michigan","county":"Dickinson 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,{"id":70023747,"text":"70023747 - 2001 - Demonstration of significant abiotic iron isotope fractionation in nature","interactions":[],"lastModifiedDate":"2018-12-03T10:03:00","indexId":"70023747","displayToPublicDate":"2001-01-01T00:00:00","publicationYear":"2001","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Demonstration of significant abiotic iron isotope fractionation in nature","docAbstract":"<p><span>Field and laboratory studies reveal that the mineral ferrihydrite, formed as a result of abiotic oxidation of aqueous ferrous to ferric Fe, contains Fe that is isotopically heavy relative to coexisting aqueous Fe. Because the electron transfer step of the oxidation process at pH &gt;5 is essentially irreversible and should favor the lighter Fe isotopes in the ferric iron product, this result suggests that relatively heavy Fe isotopes are preferentially partitioned into the readily oxidized Fe(II)(OH)</span><sub><i>x</i>(aq)</sub><span>&nbsp;species or their transition complexes prior to oxidation. The apparent Fe isotope fractionation factor, α</span><sub>ferrihydrite- water</sub><span>, depends primarily on the relative abundances of the Fe(II)</span><sub>(aq)</sub><span>species. This study demonstrates that abiotic processes can fractionate the Fe isotopes to the same extent as biotic processes, and thus Fe isotopes on their own do not provide an effective biosignature.</span></p>","language":"English","publisher":"GSW","doi":"10.1130/0091-7613(2001)029<0699:DOSAII>2.0.CO;2","issn":"00917613","usgsCitation":"Bullen, T., White, A.F., Childs, C., Vivit, D., and Schultz, M., 2001, Demonstration of significant abiotic iron isotope fractionation in nature: Geology, v. 29, no. 8, p. 699-702, https://doi.org/10.1130/0091-7613(2001)029<0699:DOSAII>2.0.CO;2.","productDescription":"4 p.","startPage":"699","endPage":"702","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":232667,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"29","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fe91e4b0c8380cd4edcd","contributors":{"authors":[{"text":"Bullen, T.D.","contributorId":79911,"corporation":false,"usgs":true,"family":"Bullen","given":"T.D.","email":"","affiliations":[],"preferred":false,"id":398670,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"White, A. F.","contributorId":36546,"corporation":false,"usgs":true,"family":"White","given":"A.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":398668,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Childs, C.W.","contributorId":82891,"corporation":false,"usgs":true,"family":"Childs","given":"C.W.","email":"","affiliations":[],"preferred":false,"id":398671,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Vivit, D.V.","contributorId":28609,"corporation":false,"usgs":true,"family":"Vivit","given":"D.V.","email":"","affiliations":[],"preferred":false,"id":398667,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Schultz, M.S.","contributorId":66023,"corporation":false,"usgs":true,"family":"Schultz","given":"M.S.","email":"","affiliations":[],"preferred":false,"id":398669,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
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