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Habitat Suitability Index Models: Black-tailed prairie dog
Norman W. Clippinger
1989, FWS/OBS 82/10.156
A review and synthesis of existing information were used to develop a Habitat Suitability Index (HSI) model for the black-tailed prairie dog (Cynomus ludovicianus). 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...
Geohydrology of the Foothill ground-water basin near Santa Barbara, California
J. R. Freckleton
1989, Water-Resources Investigations Report 89-4017
Geohydrologic data presented in this report indicate that the East Subbasin of the Goleta groundwater basin and Storage Unit II of the Santa Barbara groundwater basin should be considered as a separate groundwater basin, which is referred to as the Foothill groundwater basin in this report. The 4.5 sq-mi Foothill...
Determination of stream reaeration coefficients by use of tracers
F. A. Kilpatrick, R. E. Rathbun, Nobuhiro Yotsukura, G.W. Parker, L. L. DeLong
1989, Techniques of Water-Resources Investigations 03-A18
Stream reaeration is the physical absorption of oxygen from the atmosphere by a flowing stream. This is the primary process by which a stream replenishes the oxygen consumed in the biodegradation of organic wastes. Prior to 1965, reaeration rate coefficients could be estimated only by indirect methods. In 1965, a direct...
Geochemistry of artificial-recharge tests in the Oakes aquifer near Oakes, southeastern North Dakota
G. F. Huff, J. D. Wald
1989, Water-Resources Investigations Report 89-4122
As part of an artificial-recharge feasibility study, water from the James River was introduced into the Oakes aquifer of southeastern North Dakota by infiltration through a recharge basin. Chemical composition of water in the recharge basin and ground water from two separate flow paths beneath the basin was determined from...
Estimation of the recharge area of a pumped, stratified-drift aquifer in Connecticut by simulation modeling
D. L. Mazzaferro
1989, Water-Resources Investigations Report 87-4124
Groundwater quality management plans in Connecticut require information about the size and shape of recharge areas that contribute flow to pumping centers in extensive, stratified-drift aquifers. Flow models of a hypothetical aquifer , and a stratified-drift aquifer in Farmington are used to evaluate how contributing areas change in response to...
The significance of sediment transport in arroyo development
David F. Meyer
1989, Water Supply Paper 2349
Arroyo widening dominates postincisional arroyo development, and the manner of widening is dependent on the grain size of bed material transported by the channel. When bed material is predominantly gravel, subaqueous bars that alternate from one side of the channel to the other form during high flows in initially narrow,...
Sedimentary structures and textures of Rio Orinoco channel sands, Venezuela and Colombia
Edwin Dinwiddie McKee
1989, Water Supply Paper 2326-B
Most sedimentary structures represented in sand bodies of the Rio Orinoco are tabular-planar cross-strata which, together with some wedge-planar cross-strata, are the products of sand-wave deposition. Locally, in areas of river meander where point bars characteristically form, trough structures forming festoon patterns are numerous. At a few localities, sets of...
Geohydrologic aspects for siting and design of low-level radioactive-waste disposal
M. S. Bedinger
1989, Circular 1034
The objective for siting and design of low-level radioactive-waste repository sites is to isolate the waste from the biosphere until the waste no longer poses an unacceptable hazard as a result of radioactive decay. Low-level radioactive waste commonly is isolated at shallow depths with various engineered features to stabilize the...
A vertically averaged spectral model for tidal circulation in estuaries
J.R. Burau, R. T. Cheng
1989, Water-Resources Investigations Report 88-4126
A frequency dependent computer model based on the two-dimensional vertically averaged shallow-water equations is described for general purpose application in tidally dominated embayments. This model simulates the response of both tides and tidal currents to user-specified geometries and boundary conditions. The mathematical formulation and practical application of the model are...
Measurement of reaeration coefficients for selected Florida streams
P. S. Hampson, J.E. Coffin
1989, Water-Resources Investigations Report 87-4020
A total of 29 separate reaeration coefficient determinations were performed on 27 subreaches of 12 selected Florida streams between October 1981 and May 1985. Measurements performed prior to June 1984 were made using the peak and area methods with ethylene and propane as the tracer gases. Later measurements utilized the...
Documentation of computer programs to compute and display pathlines using results from the U.S. Geological Survey modular three-dimensional finite-difference ground-water flow model
David W. Pollock
1989, Open-File Report 89-381
A particle tracking post-processing package was developed to compute three-dimensional path lines based on output from steady-state simulations obtained with the U.S. Geological Survey modular 3-dimensional finite difference groundwater flow model. The package consists of two FORTRAN 77 computer programs: (1) MODPATH, which calculates pathlines, and (2) MODPATH-PLOT, which presents...
Estimating soil matric potential in Owens Valley, California
Stephen K. Sorenson, Reuben F. Miller, Michael R. Welch, David P. Groeneveld, Farrel A. Branson
1989, Water Supply Paper 2370-C
Much of the floor of Owens Valley, California, is covered with alkaline scrub and alkaline meadow plant communities, whose existence is dependent partly on precipitation and partly on water infiltrated into the rooting zone from the shallow water table. The extent to which these plant communities are capable of adapting...
Hydrology of the Oakley Fan Area, south-central Idaho
H.W. Young, G. D. Newton
1989, Water-Resources Investigations Report 88-4065
The Oakley Fan area is a broad, crescent-shaped lowland along the southern margin of the Snake River Plain in south-central Idaho. Intensive groundwater development for irrigation has resulted in rapid water-level declines and, as a consequence, designation by the State of four Critical Groundwater Areas. Principal aquifers are in limestone,...
Geochemistry of the Cambrian-Ordovician aquifer system in the northern Midwest, United States: D in Regional aquifer-system analysis
D. I. Siegel
1989, Professional Paper 1405-D
Distributions of solutes in aquifers of Cambrian and Ordovician age were studied in Minnesota, Wisconsin, Iowa, Illinois, northwestern Indiana, and northern Missouri to determine the sources of solutes and the probable chemical mechanisms that control regional variations in water quality. This work is part of the Northern Midwest Regional Aquifer-System...
Hydraulic characteristics of the New River in the New River Gorge National River, West Virginia
J.B. Wiley, David H. Appel
1989, Open-File Report 89-243
Traveltime, dispersion, water-surface and streambed profiles, and cross-section data were collected for use in application of flow and solute-transport models to the New River in the New River Gorge National River, West Virginia. Dye clouds subjected to increasing and decreasing flow rates (unsteady flow) showed that increasing flows shorten the...
Simulated effects of future withdrawals on water levels in the northeastern coastal plain aquifers of New Jersey
W.A. Battaglin, M. C. Hill
1989, Water-Resources Investigations Report 88-4199
In the northeastern Coastal Plain of New Jersey, groundwater withdrawals have produced large cones of depression in all four major regional aquifers. Prior to development, water levels in the four aquifers were 20 to 120 ft above sea level and natural groundwater flow was towards Raritan Bay. In 1983, when...