Water-Resources Investigations Report最新文献_第3页

Quality of water from shallow wells in the rice-growing area in southwestern Louisiana, 1999 through 2001 路易斯安那州西南部水稻种植区浅水井的水质，1999年至2001年

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI034050

R. W. Tollett, R. B. Fendick

{"title":"Quality of water from shallow wells in the rice-growing area in southwestern Louisiana, 1999 through 2001","authors":"R. W. Tollett, R. B. Fendick","doi":"10.3133/WRI034050","DOIUrl":"https://doi.org/10.3133/WRI034050","url":null,"abstract":"In 1999-2001, the U.S. Geological Survey installed and sampled 27 shallow wells in the ricegrowing area in southwestern Louisiana as part of the Acadian-Pontchartrain Study Unit of the National WaterQuality Assessment Program. The purpose of this report is to describe the quality of water from shallow wells in the rice-growing area and to relate that water quality to natural and anthropogenic activities, particularly rice agriculture. Ground-water samples were analyzed for general ground-water properties and about 150 waterquality constituents, including major inorganic ions, trace elements, nutrients, dissolved organic carbon (DOC), pesticides, radon, chlorofluorocarbons, and selected stable isotopes. Dissolved-solids concentrations for 17 wells exceeded the U.S. Environmental Protection Agency secondary maximum contaminant level of 500 milligrams per liter (mg/L) for drinking water. Concentrations for major inorganic ions, trace elements, and pesticides generally were less than the maximum contaminant levels for drinking water. Two major inorganic ions, sulfate and chloride, and two trace elements, iron and manganese, had concentrations that were greater than the secondary maximum contaminant levels. Three nutrient concentrations were greater than 2 mg/L, a level that might indicate contamination from human activities, and one nutrient concentration (that for nitrite plus nitrate as nitrogen) was greater than the maximum contaminant level of 10 mg/L for drinking water. The median concentration for DOC was 0.5 mg/L, indicating naturally-occurring DOC conditions in the study area. Thirteen pesticides and 7 pesticide degradation products were detected in 14 of the 27 wells sampled. Bentazon, 2,4-D, and molinate (three rice herbicides) were detected in water from four, one, and one wells, respectively, and malathion (a rice insecticide) was detected in water from one well. Low-level concentrations and few detections of nutrients and pesticides indicated that ground-water quality was affected slightly by anthropogenic activities. Quality-control samples, including field blanks, replicates, and spikes, indicated no bias in ground-water data from collection or analysis. Radon concentrations for 22 of the 24 wells sampled were at or greater than the U.S. Environmental Protection Agency proposed maximum contaminant level of 300 picocuries per liter. Chlorofluorocarbon concentrations in selected wells indicated the apparent ages of the ground water varied with depth and water level and ranged from about 17 to 49 years. The stable isotopes of hydrogen and oxygen in water molecules indicated the origin of ground water in the study area was rainwater that originated near the study area and that few geochemical or physical processes influenced the stable isotopic composition of the shallow ground water. The Spearman rank correlation was used to determine whether significant correlations existed between physical properties, selected chemical constituents, the","PeriodicalId":23603,"journal":{"name":"Water-Resources Investigations Report","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83588845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of Water Quality for Two St. Johns River Tributaries Receiving Septic Tank Effluent, Duval County, Florida 佛罗里达州杜瓦尔县两条圣约翰河支流接收化粪池污水的水质评价

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI034299

S. M. Wicklein

引用次数: 5

Quantification of metal loading to Silver Creek through the Silver Maple Claims area, Park City, Utah, May 2002 2002年5月，犹他州帕克城，通过Silver Maple索赔区对Silver Creek的金属装载量进行量化

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI034296

B. Kimball, K. K. Johnson, R. Runkel, J. I. Steiger

引用次数: 2

Relations among floodplain water levels, instream dissolved-oxygen conditions, and streamflow in the lower Roanoke River, North Carolina, 1997-2001 1997-2001年北卡罗来纳州罗阿诺克河下游洪泛区水位、河流溶解氧条件和河流流量之间的关系

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI034295

J. Bales, D. Walters

引用次数: 4

Sources and Transport of Nutrients, Organic Carbon, and Chlorophyll-a in the San Joaquin River Upstream of Vernalis, California, during Summer and Fall, 2000 and 2001 2000年和2001年夏秋两季加州Vernalis上游圣华金河养分、有机碳和叶绿素a的来源和运输

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI034127

C. Kratzer, P. Dileanis, C. Zamora, S. Silva, C. Kendall, B. Bergamaschi, R. Dahlgren

引用次数: 48

Status of water levels in aquifers in the Nacatoch Sand of southwestern and northeastern Arkansas and the Tokio Formation of southwestern Arkansas, 2002 2002年阿肯色西南部和东北部纳卡托克沙地和阿肯色西南部东京地层含水层的水位状况

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI034284

T. P. Schrader, Rheannon M. Scheiderer

引用次数: 2

Seasonal Variability and Effects of Stormflow on Concentrations of Pesticides and their Degradates in Kisco River and Middle Branch Croton River Surface Water, Croton Reservoir System, New York, May 2000-February 2001 Kisco河和Croton河中支流地表水中农药浓度的季节变化及其降解效应，Croton水库系统，纽约，5 / 2000- 2001 / 2

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI20034151

P. Phillips, R. W. Bode

引用次数: 2

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI034319

C. Parrett, S. Cannon, K. Pierce

引用次数: 29

Delineation of Areas Contributing Water to the Dry Brook Public-Supply Well, South Hadley, Massachusetts 为马萨诸塞州南哈德利干溪公共供水井供水的区域划定

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/wri034320

S. P. Garabedian, J. Stone

引用次数: 1

Trace Elements and Organic Compounds in Sediment and Fish Tissue from the Great Salt Lake Basins, Utah, Idaho, and Wyoming, 1998-99 犹他州、爱达荷州和怀俄明州大盐湖盆地沉积物和鱼类组织中的微量元素和有机化合物，1998- 1999

Water-Resources Investigations Report Pub Date : 2004-01-01 DOI: 10.3133/WRI034283

K. Waddell, E. Giddings

{"title":"Trace Elements and Organic Compounds in Sediment and Fish Tissue from the Great Salt Lake Basins, Utah, Idaho, and Wyoming, 1998-99","authors":"K. Waddell, E. Giddings","doi":"10.3133/WRI034283","DOIUrl":"https://doi.org/10.3133/WRI034283","url":null,"abstract":"A study to determine the occurrence and distribution of trace elements, organochlorine pesticides, polychlorinated biphenyls (PCBs), and semivolatile organic compounds in sediment and in fish tissue was conducted in the Great Salt Lake Basins study unit of the National Water-Quality Assessment (NAWQA) program during 1998-99. Streambed-sediment and fish-tissue samples were collected concurrently at 11 sites and analyzed for trace-element concentration. An additional four sites were sampled for streambed sediment only and one site for fish tissue only. Organic compounds were analyzed from streambedsediment and fish-tissue samples at 15 sites concurrently. Bed-sediment cores from lakes, reservoirs, and Farmington Bay collected by the NAWQA program in 1998 and by other researchers in 1982 were used to examine historical trends in traceelement concentration and to determine anthropogenic sources of contaminants. Cores collected in 1982 from Mirror Lake, a highmountain reference location, showed an enrichment of arsenic, cadmium, copper, lead, tin, and zinc in the surface sediments relative to the deeper sediments, indicating that enrichment likely began after about 1900. This enrichment was attributed to atmospheric deposition during the period of metal-ore mining and smelting. A core from Echo Reservoir, in the Weber River Basin, however, showed a different pattern of trace-element concentration that was attributed to a local source. This site is located downstream from the Park City mining district, which is the most likely historical source of trace elements. Cores collected in 1998 from Farmington Bay show that the concentration of lead began to increase after 1842 and peaked during the mid1980s and has been in decline since. Recent sediments deposited during 1996-98 indicate a 41to 62-percent reduction since the peak in the mid1980s. The concentration of trace elements in streambed sediment was greatest at sites that have been affected by historic mining, including sites on Little Cottonwood Creek in the Jordan River basin, Silver Creek in the Weber River basin, and the Weber River below the confluence with Silver Creek. There was significant correlation of lead concentrations in streambed sediment and fish tissue, but other trace elements did not correlate well. Streambed sediment and fish tissue collected from sites in the Bear River basin, which is predominantly rangeland and agriculture, generally had low concentrations of most elements. Sediment-quality guidelines were used to assess the relative toxicity of streambed-sediment sites to aquatic communities. Sites affected by mining exceeded the Probable Effect Concentration (PEC), the concentration at which it is likely there will be a negative effect on the aquatic community, for arsenic, cadmium, copper, lead, silver, mercury, and zinc. Sites that were not affected by mining did not exceed these criteria. Concentrations of trace elements in samples collected from the Great Salt Lake Basins ","PeriodicalId":23603,"journal":{"name":"Water-Resources Investigations Report","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83543402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4