A 5.82-square-mile drainage basin in the headwaters of the Little Conestoga Creek in Lancaster County, Pa., was investigated from October 1989 through September 1991 as part of a longer-term effort to determine the effects of nutrient management on surface-water quality. A previous investigation found no statistical evidence that implementation of nutrient management from 1986 to 1989 affected water quality. Basin land use is 68 percent agriculture and includes all or part of 51 farms. Agricultural land under nutrient management ranged from 55 percent in 1989 to 80 percent in 1991. Nitrate nitrogen, the dominant nonpoint-source contaminant, averaged about 7.5 milligrams per liter in base flow.
Implementation of nutrient management on 90 percent of applicable land in a 1.42-square-mile subbasin resulted in a 7 percent decrease in nitrogen applications from before nutrient management. Recognizing that some uncertainty exists in the nutrient-application data, the decrease consisted of a 44-percent decrease in commercial fertilizer nitrogen combined with a 3-percent increase in manure nitrogen applications. Manure accounted for 83 percent of the applied nitrogen. Amounts of nitrate nitrogen in the top 4 feet of soil ranged from 43 to 315 pounds per acre in the subbasin and were not substantially reduced from before nutrient management.
Statistical analysis of nutrient and suspended-sediment concentrations detected few significant step trends in water quality in a comparison with water quality before nutrient management. A decrease in base-flow concentrations of dissolved ammonium and suspended sediment was detected at a site draining a 1.43-square-mile subbasin with 40-percent implementation of nutrient-management plans. An increase in base-flow concentrations of suspended sediment was detected at a site draining the 1.42-square-mile subbasin with 90-percent implementation. A comparison of the dissolved nitrate plus nitrite in base-flow relations between paired subbasins detected no change from 1984-86 (before nutrient management) to 1989-91. Mean concentrations in stormflow were not reduced significantly from 1984-86 to
1989-91. Data collected during the entire 1986-91 nutrient-management period suggest a reduction in nitrogen input as large as the
30-percent reduction recorded from 1986-89 is needed to effect a 0.5-milligram-per-liter decrease in dissolved nitrate plus nitrite.
Director, Pennsylvania Water Science Center
U.S. Geological Survey
215 Limekiln Road
New Cumberland, PA 17070
The Malvern TCE Superfund Site, a former solvent recycling facility that now stores and sells solvents, consists of a plant and disposal area, which are approximately 1,900 ft (feet) apart. The site is underlain by an unconfined carbonate bedrock aquifer in which permeability has been enhanced in places by solution. Water levels respond quickly to precipitation and show a similar seasonal variation, response to precipitation, and range of fluctuation. The altitude of water levels in wells at the disposal area is nearly identical because of the small hydraulic gradient. A comparison of water-table maps for 1983, 1993, and 1994 shows that the general shape of the water table and hydraulic gradients in the area have remained the same through time and for different climatic conditions.
The plant area is underlain by dolomite of the Elbrook Formation. The dolomite at the plant area does not yield as much water as the dolomite at the disposal area because it is less fractured, and wells penetrate few water-bearing fractures. Yields of nine wells at the plant area range from 1 to 200 gal/min (gallons per minute); the median yield is 6 gal/min. Specific capacities range from 0.08 to 2 (gal/min)/ft (gallons per minute per foot). Aquifer tests were conducted in two wells; median transmissivities estimated from the aquifer-test data ranged from 528 to 839 feet squared per day. Maximum concentrations of volatile organic compounds (VOC's) in ground water at the plant area in 1996 were 53,900 ug/L (micrograms per liter) for trichloroethylene (TCE), 7,110 ug/L for tetrachloroethylene (PCE), and 17,700 ug/L for 1,1,1-trichloroethane (TCA).
A ground-water divide is located between the plant area and the disposal area. Ground-water withdrawal for dewatering the Catanach quarry has caused a cone of depression in the water-table surface that reaches to the plant area. From the plant area, ground water flows 1.2 miles to the northeast and discharges to the Catanach quarry. The regional hydraulic gradient between the plant and the Catanach quarry is 0.019. Concentrations of VOC's in water from wells drilled northeast and donwgradient of the plant property boundary are one to two orders of magnitude less than concentrations in water from wells less than 100 ft away at the plant.
A capture-zone analysis was performed for two wells at the plant area. The analysis showed that pumping well CC-19 at 20 gal/min would be sufficient to capture all ground-water flow from the plant area. Although water from other wells at the plant site contains higher concentrations of VOC's than water from well CC-19, pumping well CC-19 would induce the flow of water with higher concentrations of VOC's; however, pumping well CC-19 might causes VOC's to move lower into the aquifer.
The disposal area is underlain by the Ledger Dolomite. The dolomite at the disposal area is much more fractured than the dolomite at the plant area. Although many of the fractures are filled or partially filled with clay, the dolomite at the disposal area yields more water than the dolomite at the plant area. Yields of eight wells at the disposal area range from 15 to more than 200 gal/min; the median yield is greater than 100 gal/min. Specific capacities range from 2 to 280 (gal/min)/ft. Aquifer tests were conducted in two wells; estimated transimissivities were 34,900 and 56,300 feet squared per day. Concentrations of VOC's in ground water are lower at the disposal area than at the plant area. Water samples collected from wells at the disposal area in 1996 had maximum concentrations of TCE of 768 ug/L, PCE of 111 ug/L, and TCA of 108 ug/L. These concentrations are lower than concentrations in water samples collected before cleanup of drums in the disposal area was completed in 1984.
Ground water from the disposal area flows south-southeast toward Valley Creek. The hydraulic gradient between the disposal area and Valley Creek is 0.001. A well-defined plume of VOC’s in ground water extends downgradient from the disposal area toward Valley Creek. A comparison of data from 1995 to 1996 with data from 1981 to 1984 shows that concentrations of TCE, PCE, and TCA in water from most off-site wells have decreased and that water from fewer wells contains detectable concentrations of those compounds.
A capture-zone analysis was performed for three wells at the disposal area. The analysis showed that pumping wells CC-16, CC-17, and CC-18 at a combined rate of 270 gal/min would form a capture zone ranging from approximately 443 to 477 ft wide at a distance 500 ft upgradient from the center of the pumping wells. Pumping wells CC-16 and CC-17 together at a combined rate of 172 gal/min would form a capture zone ranging from approximately 172 to 400 ft wide at a distance 500 ft upgradient from the center of the pumping wells.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/wri964286","collaboration":"Prepared in cooperation with the U.S. Environmental Protection Agency","usgsCitation":"Sloto, R.A., 1997, Hydrogeologic investigation of the Malvern TCE Superfund Site, Chester County, Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 96-4286, Report: xiv, 124 p.; 1 Plate: 15.81 x 22.82 inches, https://doi.org/10.3133/wri964286.","productDescription":"Report: xiv, 124 p.; 1 Plate: 15.81 x 22.82 inches","onlineOnly":"Y","costCenters":[{"id":532,"text":"Pennsylvania Water Science Center","active":true,"usgs":true}],"links":[{"id":415723,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_48610.htm","linkFileType":{"id":5,"text":"html"}},{"id":95781,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wri/1996/4286/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":58580,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1996/4286/wri19964286.pdf","text":"Report","linkFileType":{"id":1,"text":"pdf"},"description":"WRI 1996-4286"},{"id":119626,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1996/4286/coverthb.jpg"}],"country":"United States","state":"Pennsylvania","county":"Chester County","otherGeospatial":"Malvern TCE Superfund Site","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -75.6,\n 40.0778\n ],\n [\n -75.6,\n 40.0458\n ],\n [\n -75.525,\n 40.0458\n ],\n [\n -75.525,\n 40.0778\n ],\n [\n -75.6,\n 40.0778\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","contact":"Director, Pennsylvania Water Science Center
U.S. Geological Survey
215 Limekiln Road
New Cumberland, PA 17070
This paper reports on preliminary results of a project to develop a comprehensive data base of chemical and environmental information on sediments from Lake Pontchartrain, Louisiana, and surrounding water bodies. The goal is to evaluate all data for reliability and comparability, and to make it widely accessible and useful to all users. Methods for processing heterogeneous, historical data follow previous methods employed in the Boston Harbor and Massachusetts Bay area.
\nData from 11 different data sets, encompassing about 900 total samples, have been entered to date. Questionable or anomalous data were noted in a minority of cases. Problems tend to follow distinct patterns and are relatively easy to identify. Hence, comparability of data has not proven to be the major obstacle to synthesis efforts that was anticipated in earlier years (NRC, 1989).
\nQuality-controlled data sets show that the bulk of sediment samples in the more central parts of Lake Pontchartrain have values within normal background for heavy metals like Cu, Pb, and Zn. The same or lower concentrations were found in the vicinity of the Bonnet Carre Spillway, representing influx from the Mississippi River. Mean concentrations for Cu, Pb, and Zn were 17, 21, and 74 µg/g (total dissolution analyses), respectively.
\nHowever, values as high as 267 µg/g Pb and comparable increases for other metal and organic contaminants are found in sediments within 2 km of the coastal strip of New Orleans. Additional sampling in such areas and in other inland coastal waterways is needed, since such levels are above the threshold for potential toxic effects on benthic organisms, according to effects-based screening criteria.
\nThe most contaminated sites, Bayou Trepagnier and Bayou Bonfouca, involve industrial areas where waste discharge has now been controlled or remediated, but where sediments may retain large concentrations of contaminants, e.g. tenths of a percent of Pb, Cr, and Zn or more for Bayou Trepagnier.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Gulf Coast Association of Geological Societies Transactions","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Gulf Coast Association of Geological Societies","usgsCitation":"Manheim, F.T., Flowers, G.C., McIntire, A.G., Marot, M., and Holmes, C., 1997, Environmental geochemistry and sediment quality in Lake Pontchartrain: database development and review: Gulf Coast Association of Geological Societies Transactions, v. 47, p. 337-349.","productDescription":"13 p.","startPage":"337","endPage":"349","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":295527,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":295526,"type":{"id":15,"text":"Index Page"},"url":"https://archives.datapages.com/data/gcags/data/047/047001/0337.htm"}],"country":"United States","state":"Louisiana","otherGeospatial":"Lake Ponchatrain","volume":"47","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"544775ade4b0f888a81b8312","contributors":{"authors":[{"text":"Manheim, Frank T.","contributorId":26991,"corporation":false,"usgs":true,"family":"Manheim","given":"Frank","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":503601,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Flowers, George C.","contributorId":66618,"corporation":false,"usgs":true,"family":"Flowers","given":"George","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":503604,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McIntire, Andrew G.","contributorId":41765,"corporation":false,"usgs":true,"family":"McIntire","given":"Andrew","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":503603,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Marot, Marcie","contributorId":88293,"corporation":false,"usgs":true,"family":"Marot","given":"Marcie","email":"","affiliations":[],"preferred":false,"id":503605,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Holmes, Charles","contributorId":34846,"corporation":false,"usgs":true,"family":"Holmes","given":"Charles","affiliations":[],"preferred":false,"id":503602,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":30018,"text":"wri964038D - 1997 - Fish communities of benchmark streams in agricultural areas of eastern Wisconsin","interactions":[],"lastModifiedDate":"2015-10-22T15:03:59","indexId":"wri964038D","displayToPublicDate":"1997-10-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"96-4038","chapter":"D","title":"Fish communities of benchmark streams in agricultural areas of eastern Wisconsin","docAbstract":"Fish communities were surveyed at 20 stream sites in agricultural areas in eastern Wisconsin in 1993 and 1995 as part of the National Water-Quality Assessment (NAWQA) Program. These streams, designated \"benchmark streams,\" were selected for study because of their potential use as regional references for healthy streams in agricultural areas, based on aquatic communities, habitat, and water chemistry. The agricultural benchmark streams were selected from four physical settings, or relatively homogeneous units (RHU's), that differ in bedrock type, texture of surficial deposits, and land use. Additional data were collected along with the fish-community data, including measures of habitat, water chemistry, and population surveys of algae and benthic invertebrates. Of the 20 sites, 19 are classified as trout (salmonid) streams. Fish species that require cold or cool water were the most commonly collected. At least one species of trout was collected at 18 sites, and trout were the most abundant species at 13 sites. The species with the greatest collective abundance, and collected at 18 of the 20 sites, were mottled sculpin (Cottus bairdi), a coldwater species. The next most abundant species were brown trout (Salmo trutta), followed by brook trout (Salvelinusfontinalis), creek chub (Semotilus atromaculatus), and longnose dace (Rhinichthys cataractae). In all, 31 species of fish were collected. The number of species per stream ranged from 2 to 14, and the number of individuals collected ranged from 19 to 264. According to Index of Biotic Integrity (IBI) scores, 5 sites were rated excellent, 10 sites rated good, 4 rated fair, and 1 rated poor. The ratings of the five sites in the fair to poor range were low for various reasons. Two sites appeared to have more warmwater species than was ideal for a high-quality coldwater stream. One was sampled during high flow and the results may not be valid for periods of normal flow; the other may have been populated by migrating warmwater species. Two sites had insufficient deep-water habitat to support large numbers offish, especially top carnivores. Finally, one stream may be too cool to support enough warmwater species and too warm to support trout. In general, two methods of evaluating site habitat indicate that habitat is not a limiting factor for fish communities. However, two sites were rated as fair according to both habitat evaluation methods due to low base flow. Two sites rated below good according to one habitat evaluation method but rated good or excellent according to the other. Detrended correspondence analysis (DCA) of data for 17 sites showed three station groupings. These groupings fell along RHU divisions and each group was associated with one of three trout species. A species-richness gradient was evident on the station-ordination diagram. Intolerant species were associated with each grouping, a reflection of the generally high water quality at the sites. However, no significant differences were found between IBI scores or habitat indices among the site groupings. The DCA axis 1 and 2 scores correlated with average velocity and percent pool as well as RHU factors percent sandy surficial deposits, percent wetland, percent agriculture, and bedrock. Average velocity was highest at three sites which also had among the highest measured flow and largest drainage areas. Percent pool was generally lower at sites with smaller percentages of sandy surficial deposits, with one exception. The usefulness of ordination methods in conjunction with more traditional methods of defining biotic integrity (IB I) has been noted in previous studies. In this study, however, perhaps because of the relative homogeneity of the benchmark streams, the IBI did not correlate with the same kinds of factors as the DCA axis scores did.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wri964038D","usgsCitation":"Sullivan, D.J., and Peterson, E.M., 1997, Fish communities of benchmark streams in agricultural areas of eastern Wisconsin: U.S. Geological Survey Water-Resources Investigations Report 96-4038, vi, 23 p., https://doi.org/10.3133/wri964038D.","productDescription":"vi, 23 p.","numberOfPages":"28","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":119531,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1996/4038d/report-thumb.jpg"},{"id":58823,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1996/4038d/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Wisconsin","otherGeospatial":"Lake Michigan","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -89.483642578125,\n 43.1090040242731\n ],\n [\n -89.483642578125,\n 45.46783598133375\n ],\n [\n -86.737060546875,\n 45.46783598133375\n ],\n [\n -86.737060546875,\n 43.1090040242731\n ],\n [\n -89.483642578125,\n 43.1090040242731\n ]\n ]\n ]\n }\n }\n ]\n}","publicComments":"National Water-Quality Assessment Program: Western Lake Michigan Drainages","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49f9e4b07f02db5f3189","contributors":{"authors":[{"text":"Sullivan, D. J.","contributorId":94693,"corporation":false,"usgs":true,"family":"Sullivan","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":202541,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peterson, E. M.","contributorId":70805,"corporation":false,"usgs":true,"family":"Peterson","given":"E.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":202540,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":29202,"text":"wri964175 - 1997 - Estimation of nutrient and suspended-sediment loads in the Patuxent River basin, Maryland, water years 1986-90","interactions":[],"lastModifiedDate":"2012-02-02T00:08:50","indexId":"wri964175","displayToPublicDate":"1997-10-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"96-4175","title":"Estimation of nutrient and suspended-sediment loads in the Patuxent River basin, Maryland, water years 1986-90","docAbstract":"Water-quality data collected at stream sites in the Patuxent River Basin from 1986 through 1990 were used to estimate loads of nutrients and otherconstituents. Studies were performed to determine the adequacy of the water-quality data for load estimation and to evaluate load estimation methods.A regression-based estimator and a ratio estimator were used to estimate loads. Comparisons indicated that the estimators provided similar levels of accuracy when constituent concentration data were available from the entire discharge range.When high-discharge concentration data were not available, it appeared that the regression-based estimator could overestimate loads of some constituents, whereas the ratio estimator appeared to underestimate some loads. The ratio estimator was selected for application in this study because the temporal inconsistencies in the sampling frequencies and patterns represented violations of the assumptions of the regression-based method.Ratio estimator load-estimate quality varied because high-flow concentration data were not available during some years. Preliminary estimation of the base-flow percentages of total loads was performed by calculating conservatively high and conservatively low base-flow load estimates, to provide limits for the actual base-flow percentage. The highest base-flow percentages--at the Unity, Savage, and Killpeck Creek sites--were for total nitrogen, because nitate from ground-water input isthe largest percentage of total nitrogen at those sites.","language":"ENGLISH","publisher":"U.S. Geological Survey ;\r\nBranch of Information Services [distributor],","doi":"10.3133/wri964175","usgsCitation":"Preston, S.D., and Summers, R., 1997, Estimation of nutrient and suspended-sediment loads in the Patuxent River basin, Maryland, water years 1986-90: U.S. Geological Survey Water-Resources Investigations Report 96-4175, vi, 69 p. :ill., maps ;28 cm., https://doi.org/10.3133/wri964175.","productDescription":"vi, 69 p. :ill., maps ;28 cm.","costCenters":[],"links":[{"id":124975,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1996/4175/report-thumb.jpg"},{"id":58061,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1996/4175/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49fee4b07f02db5f6a04","contributors":{"authors":[{"text":"Preston, S. D.","contributorId":105770,"corporation":false,"usgs":true,"family":"Preston","given":"S.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":201138,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Summers, R.M.","contributorId":9662,"corporation":false,"usgs":true,"family":"Summers","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":201137,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":2374,"text":"wsp2457 - 1997 - Base-flow characteristics of streams in the Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces of Virginia","interactions":[{"subject":{"id":24043,"text":"ofr95298 - 1995 - Base-flow characteristics of streams in the Valley and Ridge, Blue Ridge, and Piedmont physiographic provinces of Virginia","indexId":"ofr95298","publicationYear":"1995","noYear":false,"title":"Base-flow characteristics of streams in the Valley and Ridge, Blue Ridge, and Piedmont physiographic provinces of Virginia"},"predicate":"SUPERSEDED_BY","object":{"id":2374,"text":"wsp2457 - 1997 - Base-flow characteristics of streams in the Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces of Virginia","indexId":"wsp2457","publicationYear":"1997","noYear":false,"title":"Base-flow characteristics of streams in the Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces of Virginia"},"id":1}],"lastModifiedDate":"2017-08-16T11:07:52","indexId":"wsp2457","displayToPublicDate":"1997-10-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":341,"text":"Water Supply Paper","code":"WSP","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"2457","title":"Base-flow characteristics of streams in the Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces of Virginia","docAbstract":"Growth within the Valley and Ridge, Blue Ridge, and Piedmont physiographic provinces of Virginia has focused concern about allocation of surface-water flow and increased demands on the ground-water resources. Potential surface-water yield was determined from statistical analysis of base-flow characteristics of streams. Base-flow characteristics also may provide a relative indication of the potential ground-water yield for areas that lack sufficient specific capacity or will-yield data; however, other factors need to be considered, such as geologic structure, lithology, precipitation, relief, and the degree of hydraulic interconnection between the regolith and bedrock.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wsp2457","usgsCitation":"Nelms, D.L., Harlow, G., and Hayes, D., 1997, Base-flow characteristics of streams in the Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces of Virginia: U.S. Geological Survey Water Supply Paper 2457, Report: v, 48 p.; Plate: 34.62 x 22.48 inches, https://doi.org/10.3133/wsp2457.","productDescription":"Report: v, 48 p.; Plate: 34.62 x 22.48 inches","costCenters":[],"links":[{"id":137759,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":27,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.water.usgs.gov/wsp2457","linkFileType":{"id":5,"text":"html"}},{"id":344894,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wsp/wsp_2457/pdf/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":344895,"rank":4,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wsp/wsp_2457/pdf/wsp_2457.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Virginia","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a7fe4b07f02db649225","contributors":{"authors":[{"text":"Nelms, David L. 0000-0001-5747-642X dlnelms@usgs.gov","orcid":"https://orcid.org/0000-0001-5747-642X","contributorId":1892,"corporation":false,"usgs":true,"family":"Nelms","given":"David","email":"dlnelms@usgs.gov","middleInitial":"L.","affiliations":[{"id":37759,"text":"VA/WV Water Science Center","active":true,"usgs":true},{"id":614,"text":"Virginia Water Science Center","active":true,"usgs":true}],"preferred":true,"id":145101,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harlow, George E. Jr. geharlow@usgs.gov","contributorId":383,"corporation":false,"usgs":true,"family":"Harlow","given":"George E.","suffix":"Jr.","email":"geharlow@usgs.gov","affiliations":[{"id":614,"text":"Virginia Water Science Center","active":true,"usgs":true}],"preferred":false,"id":145100,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hayes, Donald C.","contributorId":52945,"corporation":false,"usgs":true,"family":"Hayes","given":"Donald C.","affiliations":[],"preferred":false,"id":145102,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":28199,"text":"wri954284 - 1997 - Precipitation-runoff and streamflow-routing models for the Willamette River basin, Oregon","interactions":[],"lastModifiedDate":"2017-02-07T08:37:00","indexId":"wri954284","displayToPublicDate":"1997-10-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"95-4284","title":"Precipitation-runoff and streamflow-routing models for the Willamette River basin, Oregon","docAbstract":"Precipitation-runoff and streamflow-routing models were constructed and assessed as part of a water-quality study of the Willamette River Basin. The study was a cooperative effort between the U.S. Geological Survey (USGS) and the Oregon Department of Environmental Quality (ODEQ) and was coordinated with the USGS National Water-Quality Assessment (NAWQA) study of the Willamette River. Routing models are needed to estimate streamflow so that water-quality constituent loads can be calculated from measured concentrations and so that sources, sinks, and downstream changes in those loads can be identified. Runoff models are needed to estimate ungaged-tributary inflows for routing models and to identify flow contributions from different parts of the basin. The runoff and routing models can be run either separately or together to simulate streamflow at various locations and to examine streamflow contributions from overland flow, shallow-subsurface flow, and ground-water flow.
\nThe 11,500-square-mile Willamette River Basin was partitioned into 21 major basins and 253 subbasins. For each subbasin, digital data layers of land use, soils, geology, and topography were combined in a geographic information system (GIS) to define hydrologic response units (HRU's), the basic computational unit for the Precipitation-Runoff Modeling System (PRMS). Spatial data layers were also used to calculate noncalibrated PRMS parameter values. Other PRMS parameter values were obtained from 10 nearby calibrated subbasins of representative location and character.
\nAbout 760 miles of the Willamette River system were partitioned into 4 main-stem networks and 17 major tributary networks for streamflow routing. Data from time-of-travel studies, discharge measurements, and flood analyses were used to develop equations that related stream cross-sectional area to discharge and stream width to discharge. These relations were derived for all 21 stream networks at approximately 3-mile intervals and used in the Diffusion Analogy Flow model (DAFLOW) in streamflow routing.
\nTen representative runoff models and 11 network-routing models were calibrated for water years 1972-75 and verified for water years 1976-78. These were the periods with the most complete and widespread streamflow record for the Willamette River Basin. Observed and estimated daily precipitation and daily minimum and maximum air temperature were used as input to the runoff models. The resulting coefficient of determination (R2) for the representative runoff models ranged from 0.69 to 0.93 for the calibration period and from 0.63 to 0.92 for the verification period; absolute errors ranged from 18 to 39 percent and from 27 to 51 percent, respectively. Bias error for the runoff modeling ranged from + 13 to -32 percent. Observed daily streamflow data were used as input to the network-routing models where available, and simulated streamflows from runoff model results were used for ungaged areas. Absolute error for the network-routing models ranged from about 21 percent for the Molalla River model, for which 70 percent of the subbasin was ungaged, to about 4 percent for the Willamette main-stem model (Albany to Salem), for which only 9 percent of the subbasin was ungaged.
\nWith an input of current streamflow, precipitation, and air temperature data the combined runoff and routing models can provide current estimates of streamflow at almost 500 locations on the main stem and major tributaries of the Willamette River with a high degree of accuracy. Relative contributions of surface runoff, subsurface flow, and ground-water flow can be assessed for 1 to 10 HRU classes in each of 253 subbasins identified for precipitation-runoff modeling. Model outputs were used with a water-quality model to simulate the movement of dye in the Pudding River as an example
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Portland, OR","doi":"10.3133/wri954284","collaboration":"Prepared in cooperation with Oregon Department of Environmental Quality","usgsCitation":"Laenen, A., and Risley, J.C., 1997, Precipitation-runoff and streamflow-routing models for the Willamette River basin, Oregon: U.S. Geological Survey Water-Resources Investigations Report 95-4284, vii, 197 p., https://doi.org/10.3133/wri954284.","productDescription":"vii, 197 p.","numberOfPages":"207","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"links":[{"id":57037,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wri/1995/4284/report.pdf","text":"Report","linkFileType":{"id":1,"text":"pdf"},"description":"Report"},{"id":159174,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wri/1995/4284/report-thumb.jpg"}],"country":"United States","state":"Oregon","otherGeospatial":"Willamette River Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -123.57421875,\n 43.31718491566708\n ],\n [\n -123.57421875,\n 46.5739667965278\n ],\n [\n -120.904541015625,\n 46.5739667965278\n ],\n [\n -120.904541015625,\n 43.31718491566708\n ],\n [\n -123.57421875,\n 43.31718491566708\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b08e4b07f02db69b810","contributors":{"authors":[{"text":"Laenen, Antonius","contributorId":107673,"corporation":false,"usgs":true,"family":"Laenen","given":"Antonius","email":"","affiliations":[],"preferred":false,"id":199382,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Risley, John C. 0000-0002-8206-5443 jrisley@usgs.gov","orcid":"https://orcid.org/0000-0002-8206-5443","contributorId":2698,"corporation":false,"usgs":true,"family":"Risley","given":"John","email":"jrisley@usgs.gov","middleInitial":"C.","affiliations":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"preferred":true,"id":199381,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":29139,"text":"wri964242 - 1997 - The relation between hydrogeology and water quality of the Lower Floridan Aquifer in Duval County, Florida, and implications for monitoring movement of saline water","interactions":[],"lastModifiedDate":"2022-11-01T20:54:24.033432","indexId":"wri964242","displayToPublicDate":"1997-09-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":342,"text":"Water-Resources Investigations Report","code":"WRI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"96-4242","title":"The relation between hydrogeology and water quality of the Lower Floridan Aquifer in Duval County, Florida, and implications for monitoring movement of saline water","docAbstract":"The hydrogeology of the Upper zone of the Lower Floridan aquifer and its relation to water quality were evaluated during a 3-year (1993-96) study. The Floridan aquifer system, a carbonate aquifer system composed of the Upper Floridan aquifer, a middle semi-confining unit, and the Lower Floridan aquifer, is the major source of water supply in northeastern Florida. The Lower Floridan aquifer is further subdivided into the Upper zone, a semi-confining unit, and the Fernandina permeable zone. As a result of increased withdrawals, heads in the aquifer system have declined and at the same time chloride concentrations have increased in the water from many wells in Duval County. A better understanding of the sources of and pathways for movement of brackish water is needed so that water managers can monitor the movement of brackish water and plan future water development. \r\n\r\nMost of the wells in Duval County deeper than 900 feet penetrate the Upper Floridan aquifer and the Upper zone of the Lower Floridan aquifer. Transmissivity estimates for these zones range from 2,000 to 194,000 feet squared per day. Permeability in the Upper zone of the Lower Floridan aquifer is primarily related to secondary porosity developed along bedding planes, joints, and fractures as a result of paleokarst processes. The Upper zone is about 300 to 500 feet thick in Duval County, based on the geophysical logs of about 40 wells ranging in depth from about 1,000 to 2,200 feet. In some areas the Upper zone has a single flow zone, but in other areas, two distinct flow zones are apparent. \r\n\r\nWater samples collected during this study confirm the continued increase in chloride concentrations in both the Upper Floridan aquifer and the Upper zone of the Lower Floridan aquifer. Most of the observed increases are in the eastern part of the county, but a pattern in the locations of wells yielding water with chloride increases is not discernible. In some areas, zones bearing brackish water are underlain by zones of fresher water, but in other areas, fresher water was not found beneath the brackish water. A single fracture or solution feature was the source of brackish water in several wells. \r\n\r\nThe most likely source of brackish water to the Upper zone of the Lower Floridan aquifer is the underlying Fernandina permeable zone, which contains freshwater in the western part of the county but saline water in the eastern part. The pathways for movement of saline water are interconnecting vertical and horizontal fracture or solution zones probably developed along paleokarst features that are not mappable from the land surface; therefore, a conventional monitor-well network probably would not provide early warning of saline-water intrusion. Continued monitoring of water-quality trends in water-supply wells, combined with collection of additional surface and borehole geophysical data, can provide an increased understanding of the movement of brackish water in the Floridan aquifer system.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/wri964242","usgsCitation":"Phelps, G.G., and Spechler, R., 1997, The relation between hydrogeology and water quality of the Lower Floridan Aquifer in Duval County, Florida, and implications for monitoring movement of saline water: U.S. Geological Survey Water-Resources Investigations Report 96-4242, v, 58 p., https://doi.org/10.3133/wri964242.","productDescription":"v, 58 p.","costCenters":[],"links":[{"id":159378,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":2331,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.water.usgs.gov/wri964242/","linkFileType":{"id":5,"text":"html"}},{"id":409024,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_48572.htm","linkFileType":{"id":5,"text":"html"}}],"country":"United States","state":"Florida","county":"Duval County","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -82,\n 30.5\n ],\n [\n -82,\n 30.1267\n ],\n [\n -81.333,\n 30.1267\n ],\n [\n -81.333,\n 30.5\n ],\n [\n -82,\n 30.5\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a17e4b07f02db604256","contributors":{"authors":[{"text":"Phelps, G. G.","contributorId":82346,"corporation":false,"usgs":true,"family":"Phelps","given":"G.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":201004,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Spechler, R. M.","contributorId":85961,"corporation":false,"usgs":true,"family":"Spechler","given":"R. M.","affiliations":[],"preferred":false,"id":201005,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":31699,"text":"ofr96631 - 1997 - Physical characteristics of stream subbasins in the Middle Minnesota - Little Cottonwood River Basin, south-central Minnesota","interactions":[],"lastModifiedDate":"2022-07-12T23:21:09.610275","indexId":"ofr96631","displayToPublicDate":"1997-09-01T00:00:00","publicationYear":"1997","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"96-631","title":"Physical characteristics of stream subbasins in the Middle Minnesota - Little Cottonwood River Basin, south-central Minnesota","docAbstract":"Data that describe the physical characteristics of stream subbasins upstream from selected sites on streams in the Middle Minnesota-Little Cottonwood River Basin, located in south-central Minnesota are presented in this report. The physical characteristics are the drainage area of the subbasin, the percentage area of the subbasin covered only by lakes, the percentage area of the subbasin covered by both lakes and wetlands, the main-channel length, and the main-channel slope. Stream sites include outlets of subbasins of at least 5 square miles, outfalls of sewage treatment plants, and locations of U.S. Geological Survey low-flow, high-flow, and continuous-record gaging stations.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Mounds View, MN","doi":"10.3133/ofr96631","collaboration":"Prepared in cooperation with Minnesota Department of Transportation","usgsCitation":"Sanocki, C.A., 1997, Physical characteristics of stream subbasins in the Middle Minnesota - Little Cottonwood River Basin, south-central Minnesota: U.S. Geological Survey Open-File Report 96-631, Document: 13 p.; Plate: 43.00 × 31.00 inches, https://doi.org/10.3133/ofr96631.","productDescription":"Document: 13 p.; Plate: 43.00 × 31.00 inches","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"links":[{"id":403571,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_18661.htm","linkFileType":{"id":5,"text":"html"}},{"id":19524,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1996/0631/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":19523,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1996/0631/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":160011,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1996/0631/report-thumb.jpg"}],"country":"United States","state":"Minnesota","otherGeospatial":"Middle Minnesota - Little Cottonwood River Basin","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -94.2791748046875, 44.36509667482153 ], [ -94.26750183105469, 44.36313311380771 ], [ -94.2572021484375, 44.3587148608905 ], [ -94.24278259277344, 44.356751085978146 ], [ 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