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Irrigation-induced contamination of water, sediment, and biota in the western United States-synthesis of data from the National Irrigation Water Quality Program
Ralph L. Seiler, Joseph P. Skorupa, David L. Naftz, B. Thomas Nolan
2003, Professional Paper 1655
In October 1985 the U.S. Department of the Interior (DOI), through the National Irrigation Water Quality Program (NIWQP), began a series of field investigations at 26 areas in the Western United States to determine whether irrigation drainage has had harmful effects on fish, wildlife, and humans or has reduced beneficial...
Hydrologic properties and ground-water flow systems of the Paleozoic rocks in the upper Colorado River basin in Arizona, Colorado, New Mexico, Utah, and Wyoming, excluding the San Juan Basin
Arthur L. Geldon
2003, Professional Paper 1411-B
The hydrologic properties and ground-water flow systems of Paleozoic sedimentary rocks in the Upper Colorado River Basin were investigated under the Regional Aquifer-System Analysis (RASA) program of the U.S. Geological Survey in anticipation of the development of water supplies from bedrock aquifers to fulfill the region's growing water demands. The...
Hydrogeology Journal in 2002
Perry Olcott, Robert Schneider, Clifford Voss
2003, Hydrogeology Journal (11) 1-2
Hydrogeology Journal appeared in six issues containing a total of 674 pages and 47 major articles, including 22 Papers and 24 Reports, as well as Technical Notes and Book Reviews. The final issue of 2002 also contained the annual volume index. Hydrogeology Journal (HJ) is an...
Response to comment on "Pharmaceuticals, hormones, and other organic wastewater contaminants in U.S. streams, 1999-2000: A national reconnaissance"
Dana W. Kolpin, Edward T. Furlong, Michael T. Meyer, E. Michael Thurman, Steven D. Zaugg, Larry B. Barber, Herbert T. Buxton
2003, Environmental Science & Technology (37) 1054-1054
Till (1) raised concerns that several aspects of how we handled the data in our study (2) may have caused unintended bias. First, Till (1) considers the “median detectable concentrations” listed in Table 1 (2) to be misleading because “higher median concentrations than is actually the case” were suggested. We...
Potential for increased mercury accumulation in the estuary food web
Jay A. Davis, Donald Yee, Joshua N. Collins, Steven E. Schwarzbach, Samuel N. Luoma
2003, San Francisco Estuary and Watershed Science (1)
Present concentrations of mercury in large portions of San Francisco Bay (Bay), the Sacramento-San Joaquin Delta (Delta), and the Sacramento and San Joaquin rivers are high enough to warrant concern for the health of humans and wildlife. Large scale tidal wetland restoration is currently under consideration as a means of...
Interseasonal covariability of Sierra Nevada streamflow and San Francisco Bay salinity
Michael D. Dettinger, Daniel R. Cayan
2003, Journal of Hydrology (277) 164-181
The ecosystems of the San Francisco Bay estuary are influenced by the salinity of its waters, which in turn depends on flushing by freshwater inflows from the western slopes of the Sierra Nevada. Estimates of full-natural flows in eight major rivers that flush the Bay are analyzed here by extended...
A special issue devoted to gold deposits in northern Nevada: Part 2. Carlin-type Deposits
Albert H. Hofstra, David A. John, Ted G. Theodore
2003, Economic Geology (98) 1063-1067
This is the second of two special issues of Economic Geology devoted to gold deposits in northern Nevada. Readers interested in a general overview of these deposits, their economic significance, their context within the tectonic evolution of the region, and synoptic references on each gold deposit type are directed to...
Arsenic in southeastern Michigan
Allan Kolker, Sheridan K. Haack, William F. Cannon, D.B. Westjohn, M.-J. Kim, Laurel G. Woodruff
A. H. Welch, Kenneth G. Stollenwerk, editor(s)
2003, Book chapter, Arsenic in ground water
Arsenic levels exceeding 10 μg/L are present in hundreds of private supply wells distributed over ten counties in eastern and southeastern Michigan. Most of these wells are completed in the Mississippian Marshall Sandstone, the principal bedrock aquifer in the region, or in Pleistocene glacial or Pennsylvanian bedrock aquifers. About 70%...
Occurrence of arsenic in ground water of the Middle Rio Grande Basin, central New Mexico
L.N. Plummer
A. H. Welch, Kenneth G. Stollenwerk, editor(s)
2003, Book chapter, Arsenic in ground water
Chemical data from more than 400 ground-water sites in the Middle Rio Grande Basin of central New Mexico indicate that arsenic concentrations exceed the U.S. Environmental Protection Agency drinking-water standard of 10 micrograms per liter across broad areas of the Santa Fe Group aquifer system, which is currently the almost...
How fast does water flow in an unsaturated macropore? Evidence from field and lab experiments
John R. Nimmo
2003, Book chapter, Estudios de la zona no saturada del suelo, v. VI
A wide range of available field and lab evidence can lead to useful generalizations about the speed of macropore flow, which often dominates the transport of water and contaminants. In 36 published field tests, the values of maximum transport speed in macropores and other preferential channels vary surprisingly little. The...
Microbial degradation of atmospheric halocarbons
Ronald S. Oremland
2003, Book chapter, Microbiology of atmospheric trace gases
Halocarbons are present in the atmosphere at parts-per-trillion (ppt) mixing ratios and are represented by such substances as chlorofluorocarbons (CFCs), hydrochlolofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), and methyl halides like methyl bromide (MeBr) and their further substituted halomethane analogues (e. g., dibromomethane, bromoform). Many Halocarbons have only an anthropogenic origin (e.g., CFCs,...