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Page 1438, results 35926 - 35950

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Not all publications have extents, not all extents are completely accurate
The role of sediments in the chemistry of aquatic systems - Proceedings of the sediment chemistry workshop, February 8-12, 1982
Wesley L. Bradford, Arthur J. Horowitz, editor(s)
1988, Circular 969
A workshop on sediment chemistry was held at the U.S. Geological Survey National Headquarters in Reston, Virginia, February 8-12, 1982, to discuss the state of the science and possible future directions for research and operational programs in the Water Resources Division of the U.S. Geological Survey. Technical papers presented broad...
Water resources of Borrego Valley and vicinity, San Diego County, California: Phase 2 - Development of a ground-water flow model
H. T. Mitten, G. C. Lines, Charles Berenbrock, T. J. Durbin
1988, Water-Resources Investigations Report 87-4199
Because of the imbalance between recharge and pumpage, groundwater levels declined as much as 100 ft in some areas of Borrego Valley, California during drinking 1945-80. As an aid to analyzing the effects of pumping on the groundwater system, a three-dimensional finite-element groundwater flow model was developed. The model was...
Application of the two-film model to the volatilization of acetone and t-butyl alcohol from water as a function of temperature
R. E. Rathbun, D. Y. Tai
1988, Water Supply Paper 2318
The two-film model is often used to describe the volatilization of organic substances from water. This model assumes uniformly mixed water and air phases separated by thin films of water and air in which mass transfer is by molecular diffusion. Mass-transfer coefficients for the films, commonly called film coefficients, are...
Hydrogeology of the Great Basin region of Nevada, Utah, and adjacent states
Russell W. Plume, Stephen M. Carlton
1988, Hydrologic Atlas 694-A
This atlas is a product of the Great Basin Regional Aquifer-System Analysis (RASA), a study that began in 1981. The study is part of a U.S. Geological Survey program for evaluating regional aquifer systems nationwide. A regional aquifer system is defined as “an areally extensive set of aquifers which are...
Mineral resources and resource potential map of the Pyramid Peak Roadless Area, Riverside County, California
J.P. Calzia
1988, Miscellaneous Field Studies Map 1999
The Pyramid Peak Roadless Area is underlain by mid-Cretaceous plutonic rocks (granite, granodiorite, and tonalite) that intrude metasedimentary rocks of the Desert Divide Group. The granodiorite grades eastward into strongly deformed mylonitic rocks mapped as part of the Santa Rosa mylonite zone. Metasedimentary rocks, orthogneiss, and anatexites of the Palm...
Maps showing distribution of anomalies based on the use of R-mode factor analysis for selected groupings of elements in samples of minus-60-mesh (0.25-MM) stream sediment and nonmagnetic heavy-mineral concentrate, Walker Lake 1 degree by 2 degrees Quadrangle, California and Nevada
M.A. Chaffee
1988, Miscellaneous Field Studies Map 1382-K
This report is part of a folio of maps of the Walker Lake 1o x 2o quadrangle, California and Nevada, prepared under the Conterminous United States Mineral Assessment Program. The folio includes geological, geochemical, and geophysical maps, as well as mineral resources assessment maps, which identify selected known or possible mineral-deposit environments...
Habitat Suitability Index Models: Black-bellied whistling-duck (breeding)
Paul M. McKenzie, Phillip J. Zwank
1988, FWS/OBS 82/10.150
A review and synthesis of existing information were used to develop a model for evaluating the quality of habitat for breeding black-bellied whistling-ducks. The model is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0 (optimal habitat). Habitat suitability index models are designed to be used with Habitat...
Habitat Suitability Index Models: Diamondback terrapin (nesting) - Atlantic coast
William M. Palmer, Carroll L. Cordes
1988, FWS/OBS 82/10.151
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the diamondback terrapin (Malaclemys terrapin). The model consolidates habitat use information into a framework appropriate for field application, and is scaled to produce an index between 0.0 (unsuitable habitat) to 1.0 (optimum...
Habitat Suitability Index Models: American eider (breeding)
A. K. Blumton, Ray B. Owen Jr., William B. Krohn
1988, FWS/OBS 82/10.149
INTRODUCTION The common eider (Somateria mollissima) consists of five subspecies; four are found in North America (Palmer 1976). Six management populations of common eiders have recently been defined in eastern Canada and the United States (Reed and Erskine 1986). The American edier (S. mollissima dresseri), of which three populations are recognized...
Hydrogeology and simulated effects of ground-water development on an unconfined aquifer in the Closed Basin Division, San Luis Valley, Colorado
G.J. Leonard, Kenneth R. Watts
1988, Water-Resources Investigations Report 87-4284
Wells completed in an unconfined aquifer in the Closed Basin Division of the San Luis Valley Project, Colorado, are expected to provide about 101,800 acre-ft of groundwater/year to the Rio Grande when this project is completed. Lowering of groundwater levels in the unconfined aquifer is expected to decrease the quantity...
Potential yields of wells in unconsolidated aquifers in upstate New York — Hudson-Mohawk sheet
Edward F. Bugliosi, Ruth A. Trudell, George D. Casey
1988, Water-Resources Investigations Report 87-4275
This map shows the location and potential well yields of unconsolidated aquifers in the Hudson-Mohawk region at a scale of 1:250,000. It also delineates segments of aquifers that are heavily used by community water systems and designated by the New York State Department of Environmental Conservation as ' Primary Water...
Potential yields of wells in unconsolidated aquifers in upstate New York — Adirondack sheet
Edward F. Bugliosi, Ruth A. Trudell, George D. Casey
1988, Water-Resources Investigations Report 87-4276
This map shows the location and potential well yield from unconsolidated aquifers in the Adirondack region at a 1:250,000 scale. It also delineates segments of aquifers that are heavily used by community water systems and designated by the New York State Department of Environmental Conservation as ' Primary Water Supply...
Regionalization of mean annual suspended-sediment loads in streams, central, northwestern, and southwestern Colorado
J. G. Elliott
1988, Water-Resources Investigations Report 87-4193
Regression analysis was used to develop models for estimating mean annual suspended-sediment loads for streams in Colorado. Mean annual suspended-sediment loads at 81 selected streamflow-gaging stations in the central, northwestern, and southwestern regions of Colorado were expressed as functions of geomorphic and hydrologic variables. A multiple-regression model that included mean...
Fracture characterization and fracture-permeability estimation at the underground research laboratory in southeastern Manitoba, Canada
Frederick L. Paillet
1988, Water-Resources Investigations Report 88-4009
Various conventional geophysical well logs were obtained in conjunction with acoustic tube-wave amplitude and experimental heat-pulse flowmeter measurements in two deep boreholes in granitic rocks on the Canadian shield in southeastern Manitoba. The objective of this study is the development of measurement techniques and data processing methods for characterization of...
The Geology and Remarkable Thermal Activity of Norris Geyser Basin, Yellowstone National Park, Wyoming
Donald Edward White, Roderick A. Hutchinson, Terry E.C. Keith
1988, Professional Paper 1456
Norris Geyser Basin, normally shortened to Norris Basin, is adjacent to the north rim of the Yellowstone caldera at the common intersection of the caldera rim and the Norris-Mammoth Corridor, a zone of faults, volcanic vents, and thermal activity that strikes north from the caldera rim to Mammoth Hot Springs....
Low-flow routing in the Lehigh and Delaware Rivers, Pennsylvania
H.N. Flippo Jr.
1988, Water-Resources Investigations Report 85-4331
Flow-routing studies were made to evaluate the response of the Lehigh and Delaware Rivers to low-flow augmentative releases from two reservoirs --Francis E. Walter Reservoir and Beltzville Lake--in the Lehigh River basin. Digital routing models that use diffusion-analogy methods to convolute flows with system-response functions were developed to simulate daily...
Hydrogeology and flow of water in a sand and gravel aquifer contaminated by wood-preserving compounds, Pensacola, Florida
B.J. Franks
1988, Water-Resources Investigations Report 87-4260
The sand and gravel aquifer in southern Escambia County, Florida , is a typical surficial aquifer composed of quartz sands and gravels interbedded locally with silts and clays. Problems of groundwater contamination from leaking surface impoundments are common in surficial aquifers and are a subject of increasing concern and attention....
Mineral resources of the Whipple Mountains and Whipple Mountains Addition Wilderness Study Areas, San Bernardino County, California
Sherman P. Marsh, Gary L. Raines, Michael F. Diggles, Keith A. Howard, Robert W. Simpson, Donald B. Hoover, James Ridenour, Phillip R. Moyle, Spencee L. Willett
1988, Bulletin 1713-D
At the request of the U.S. Bureau of Land Management, approximately 85,100 acres of the Whipple Mountains Wilderness Study Area (CDCA-312) and 1,380 acres of the Whipple Mountains Addition Wilderness Study Area (AZ-050-010) were evaluated for identified mineral resources (known) and mineral resource potential (undiscovered). In this report, the Whipple...
Estimation of natural dissolved-solids discharge in the Upper Colorado River basin, Western United States
D. K. Mueller, L.L. Osen
1988, Water-Resources Investigations Report 87-4069
A statistical method was developed to estimate monthly natural dissolved-solids discharge at selected sites in the Upper Colorado River Basin. Natural dissolved-solids discharge was defined as the rate of inorganic-solute flow past a specific site that would have occurred if there had been no water-resources development in the basin upstream...
Estimation, analysis, sources, and verification of consumptive water use data in the Great Lakes-St. Lawrence River basin
D. S. Snavely
1988, Water-Resources Investigations Report 88-4146
The Great Lakes-St. Lawrence River basin provides water for many uses and for wildlife habitat; thus many groups have developed strategies to manage the basin 's water resource. The International Joint Commission (IJC) is reviewing and comparing available consumptive-use data to assess the magnitude and effect of consumptive uses under...
Potential yields of wells in unconsolidated aquifers in upstate New York — Niagara sheet
Todd S. Miller
1988, Water-Resources Investigations Report 88-4076
This map depicts the locations and potential well yields of unconsolidated aquifers in western New York at a scale of 1:250 ,000. It also delineates segments of aquifers that are used for public water supplies and designated by the New York State Department of Environmental Conservation as Primary Water Supply...