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Browse more than 160,000 publications authored by our scientists over the past 100+ year history of the USGS.  Publications available are: USGS-authored journal articles, series reports, book chapters, other government publications, and more.

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Filter Total Items: 171761

A study of the temporal variability of atrazine in private well water. part ii: analysis of data

In 1988, the Iowa Department of Natural Resources, along withthe University of Iowa, conducted the Statewide Rural WellWater Survey, commonly known as SWRL. A total of 686private rural drinking water wells was selected by use of aprobability sample and tested for pesticides and nitrate. A subsetof these wells, the 10% repeat wells, were additionally sampledin October, 1990 and June, 1991. Starting
Authors
Paul Pinsky, Matthew Lorber, Kent Johnson, Burton Kross, Leon Burmeister, Amina Wilkins, George Hallberg
By
Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

Assessment of the water resources of the Grand Ronde area, Oregon

Stream hydrographs show that throughout the Grand Ronde area most precipitation follows surface or shallow subsurface pathways to streams, resulting in rapid runoff and little natural water storage within the basin. Limited storage and low aquifer permeability restrict base flow to streams, and streamflows therefore decline rapidly once precipitation ceases. Shallow ground water and springs occur
Authors
Kathleen A. McCarthy, John C. Risley, Rodney R. Caldwell, William D. McFarland
By
Water Resources Mission Area, Oregon Water Science Center

Changes in flow in the Beaver-North Canadian River basin upstream from Canton Lake, western Oklahoma

This report presents the results of an evaluation of hydrologic data for the Beaver-North Canadian River basin upstream from Canton Lake in western Oklahoma. It examines the climatic and hydrologic data for evidence of trends. The hydrologic data examined includes total annual flow, base flow, and annual peak discharges. This study was conducted to determine if there is evidence of trends present
Authors
Kenneth L. Wahl, Robert L. Tortorelli

Chlorofluorocarbon and tritium age determination of ground-water recharge in the Ryan Flat subbasin, Trans-Pecos Texas

A study was conducted to determine the relative influence of mountain-front infiltration in the Ryan Flat subbasin and to determine whether recent recharge (post-1940), which is of importance to water-use planning, has reached the Salt Basin aquifer, Trans-Pecos Texas. The alluvial and volcanic Salt Basin aquifer lies within a bolson, and the average depth to water in most of the subba
Authors
J. R. Bartolino
By
New Mexico Water Science Center

Computation of the time-varying flow rate from an artesian well in central Dade County, Florida, by analytical and numerical simulation methods

Simulation modeling techniques can by used advantageously in estimating artesian flow rates of wells in the upper Floridan Aquifer or for estimating transmissivity based in measured flow rates. The generalized aquifer model was useful in testing conceptual models of the relation between the various aquifers and confining layers beneath the surface of Dade County.
Authors
Michael L. Merritt

Construction and geologic log of the South Wailua monitor well (State well 2-0121-01), Lihue, Kauai, Hawaii

No abstract available.
Authors
S. K. Izuka, S. B. Gingerich

Construction, geologic log, and aquifer tests of the Hanamaulu monitor well (State well 2-5923-08), Lihue, Kauai, Hawaii

No abstract available.
Authors
S. K. Izuka, S. B. Gingerich

Construction, geologic log, and aquifer tests of the northeast Kilohana monitor well (State well 2-0124-01), Lihue, Kauai, Hawaii

No abstract available.
Authors
S. K. Izuka, S. B. Gingerich

Construction, geologic log, and aquifer tests of the northwest Kilohana Monitor well (State well 2-0126-01), Lihue, Kauai, Hawaii

No abstract available.
Authors
S. B. Gingerich, S. K. Izuka

Construction, geologic log, and aquifer tests of the Puakukui Springs monitor well (State well 2-5626-01), Lihue, Kauai, Hawaii

No abstract available.
Authors
S. B. Gingerich, S. K. Izuka

Construction, geologic log, and aquifer tests of the Pukaki Reservoir monitor well (State well 2-0023-01), Lihue, Kauai, Hawaii

No abstract available.
Authors
S. K. Izuka, S. B. Gingerich

Crinoids; a computer animation and paper model

No abstract available.
Authors
Tau Rho Alpha, Dorothy L. Stout, Scott W. Starratt
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