Digital model of ground-water flow in the Piceance Basin, Rio Blanco and Garfield Counties, Colorado
John B. Weeks
1978, Water-Resources Investigations Report 78-46
The digital model used to simulate ground-water flow in the aquifer system in the basin drained by Piceance and Yellow Creeks in northwestern Colorado is described in detail. The model is quasi three-dimensional in that it simulates ground-water flow in a multiaquifer system by assuming horizontal flow in the aquifers...
Method of estimating natural recharge to the Edwards Aquifer in the San Antonio area, Texas
Celso Puente
1978, Water-Resources Investigations Report 78-10
The method of estimating annual recharge is based on data collected from a network of stream-gaging stations and on assumptions related to applying the runoff characteristics from gaged areas to ungaged areas. The basic approach is a water-balance equation, in which recharge within a stream basin is the difference between...
Flood profiles for Cypress Creek, west-central Florida
W. R. Murphy Jr.
1978, Water-Resources Investigations Report 78-8
Flood profiles are included for selected recurrence-interval floods in west-central Florida for a 27-mile reach of Cypress Creek, for a 4-mile tributary reach, and for a 1.2-mile distributary reach. The procedure for constructing flood profiles is based on flood heights computed in a step-backwater analysis using the following data: 2-,...
Flood profiles for lower Brooker Creek, west-central Florida
W.R. Murphy
1978, Water-Resources Investigations Report 77-115
Flood heights are computed for a range of recurrence intervals for a 12.6 mile reach of Brooker Creek, beginning at the mouth at Lake Tarpon. A Geological Survey step-backwater computer program, E431, was used in these analyses using: (1) Stream and valley cross-section geometry and roughness data; (2) Recurrence interval...
Sediment transport in the Feather River, Lake Oroville to Yuba City, California
George Porterfield, Robert D. Busch, Arvi O. Waananen
1978, Water-Resources Investigations Report 78-20
Regulation of the Feather River by Oroville Dam and reservoir in northeast California (beginning in 1967) changed the streamflow and sediment discharge downstream from the dam. Changes in channel geometry to adjust to the new regimen were still in process in 1975. Streamflow and sediment concentration and discharge had decreased....
Flood profiles for Peace River, south-central Florida
W. R. Murphy Jr., K.M. Hammett, C. V. Reeter
1978, Water-Resources Investigations Report 78-57
This report presents flood heights and profiles for a 70-mile reach of Peace River from Bartow to Arcadia, Fla. The flood heights were calculated using the U.S. Geological Survey step-backwater model. Profiles were prepared for floods having expected recurrence intervals of 2, 2.33, 5, 10, 25, 50, 100, 200, and...
Ground-water resources of the Marine Corps Base, Twentynine Palms, San Bernardino County, California
Donald H. Schaefer
1978, Water-Resources Investigations Report 77-37
The Marine Corps Base, Twentynine Palms, Calif., pumped 2,600 acre-feet of water in 1975 from five supply wells in the Surprise Spring subbasin. The water levels in those wells declined an average of 35 feet in the preceding 10 years. This decline is a result of (1) the proximity of...
Stream quality in the San Lorenzo River Basin, Santa Cruz County, California
Marc A. Sylvester, Kenneth J. Covay
1978, Water-Resources Investigations Report 78-19
Stream quality in the San Lorenzo River basin, Calif., was studied from November 1973 through June 1975 to determine areal and temporal variations in water quality, problem areas and times of water quality degradation, and compliance with State and local water-quality objectives. Sampling from November 1973 through July 1974 was...
Water resources of the Waccasassa River Basin and adjacent areas, Florida
G.F. Taylor, L.J. Snell
1978, Water-Resources Investigations Report 77-101
This map report was prepared in cooperation with the Southwest Florida Water Management District which, with the Waccasassa River Basin Board, had jurisdiction over waters within the Waccasassa River basin, the coastal areas adjacent to the basin, and other adjacent areas outside the basin. New water management district boundaries, effective...
A preliminary appraisal of the impact of agriculture on ground-water availability in southwest Georgia
L.D. Pollard, R.G. Grantham, H.E. Blanchard Jr.
1978, Water-Resources Investigations Report 79-7
Irrigated acreage in the study area in southwest Georgia increased from 130,000 acres in 1976 to 261,000 in 1977. Acreage irrigated entirely by ground water increased 85 percent for the same period. The largest quantity of ground water used for irrigation was in the Dougherty Plain district, where 92 percent...
Technique for estimating magnitude and frequency of floods in Delaware
R.H. Simmons, D.H. Carpenter
1978, Water-Resources Investigations Report 78-93
A flood-estimating method is presented which applies to drainage basins in Delaware without urban development and covers selected recurrence intervals from 2 to 100 years. The method was developed by multiple-regression techniques. The State is divided into two regions and sets of equations for calculating peak discharges based on physical...
Map showing low-flow frequency of Minnesota streams
S. A. Warne
1978, Water-Resources Investigations Report 78-132
No abstract available....
Guidelines for the use of structural versus regression analysis in geomorphic studies
W. R. Osterkamp, Jesse M. McNellis, Paul Robert Jordan
1978, Water-Resources Investigations Report 78-135
Simple-regression and structural analysis are similar methods of developing a linear relation from a bivariant group of data. Regression analysis is a useful curve-fitting technique, but often is misapplied to geomorphic data sets. When error components can be identified for both variables, the statistical technique of structural analysis is preferred....
Effects of land use and water management on water quality in the western South New River Canal basin: southeast Florida, 1974-75
B.G. Waller
1978, Water-Resources Investigations Report 78-30
The South New River Canal (C-11) basin between water-control structures S-9 and S-13 is an area that is primarily undeveloped and the system of waterways within the basin is highly controlled for water-management purposes. Most of the recharge to the canals is by induced ground-water inflow and seepage. The chemical...
Sediment transport by the White River into Mud Mountain Reservoir: Washington, June 1974-June 1976
Leonard M. Nelson
1978, Water-Resources Investigations Report 78-133
This reconnaissance evaluation of the sediment transport by the White River into the Mud Mountain Reservoir, in Washington, during the period June 1974-June 1976 showed that the river transported 430,000 tons of suspended sediment into the reservoir during the first year of the study and 1,400,000 tons in the second...
Plan of study for the High Plains regional aquifer-system analysis in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming
John B. Weeks
1978, Water-Resources Investigations Report 78-70
The Ogallala Formation and associated Tertiary and Quarternary deposits form the principal aquifers supporting irrigation in the High Plains of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. The volume of water in storage within the aquifers is declining in most of the High Plains because water...
Limnology of Laguna Tortuguero, Puerto Rico
Ferdinand Quinones-Marquez, Luis A. Fuste
1978, Water-Resources Investigations Report 77-122
The principal chemical, physical and biological characteristics, and the hydrology of Laguna Tortuguero, Puerto Rico, were studied from 1974-75. The lagoon, with an area of 2.24 square kilometers and a volume of about 2.68 million cubic meters, contains about 5 percent of seawater. Drainage through a canal on the north...
Methods of estimating recharge to the Floridan aquifer in northeast Florida
G. G. Phelps
1978, Water-Resources Investigations Report 77-109
Recharge to the principal artesian aquifer in a six-county area in northeast Florida was calculated using closed contour methods , water budgets, and formulas for computing leakage through confining beds. Each estimate was tested in a computer model of groundwater flow to see which estimate was best. Calculations of flow...
Hydrologic, geologic, and water-quality data, Ochlockonee River basin area, Florida
Charles A. Pascale, Jeffrey R. Wagner, James E. Sohm
1978, Water-Resources Investigations Report 78-97
This report presents hydrologic, geologic, and water-quality data collected within the Ochlockonee River basin area, in the panhandle of northwest Florida. The data are presented in graphs and tables. Surface-water data include streamflow measurements and analyses of water collected at 58 sites; ground-water data include descriptions of 360 wells and...
Potentiometric surface of Floridan aquifer, Southwest Florida Water Management District and adjacent areas, September 1977
P.D. Ryder, L. R. Mills, C. P. Laughlin
1978, Water-Resources Investigations Report 78-9
A potentiometric-surface map of the Southwest Florida Water Management District depicts the annual high water-level period. Potentiometric levels increased 15 to 30 feet between May 1977 and September 1977 in the citrus and farming sections of southeastern Hillsborough, northern Hardee, and southwestern Polk Counties. These areas are widely affected by...
Hydrology of the Nevin Wetland near Madison, Wisconsin
R.P. Novitzki
1978, Water-Resources Investigations Report 78-48
The 120-acre Nevin wetland at the south edge of Madison, Wis., is a discharge area of the local ground-water system. A hydrologic unit composed of drift and the upper part of an underlying sandstone sequence provides ground-water inflow. Ground water enters as springflow and as leakage upward through the organic...
Model evaluation of the hydrogeology of the Cypress Creek well field in west-central Florida
Paul D. Ryder
1978, Water-Resources Investigations Report 78-79
The Cypress Creek well field is being developed to help supply a rapidly growing population in west-central Florida. The ground-water system in the Cypress Creek well-field area consists of a surficial sand aquifer, a semiconfining clay layer ranging from 2 to 25 feet in thickness, and a sequence of carbonate...
Predicted water-level and water-quality effects of artificial recharge in the Upper Coachella Valley, California, using a finite-element digital model
Lindsay A. Swain
1978, Water-Resources Investigations Report 77-29
From 1936 to 1974, water levels declined more than 100 feet in the Palm Springs area and 60 feet in the Palm Desert area of the upper Coachella Valley, Calif. Water from the Colorado River Aqueduct is presently being recharged to the basin. The dissolved-solids concentration of native ground water...
An oilspill risk analysis of the Mid-Atlantic (Proposed Sale 49) outer continental shelf lease area
James Richard Slack, Timothy Wyant
1978, Water-Resources Investigations Report 78-56
An oilspill risk analysis was conducted to determine the relative environmental hazards of developing oil in different regions of the mid-Atlantic Outer Continental Shelf lease area. The study analyzed the probability of spill occurrence, likely paths of the spilled oil, and locations in space and time of recreational and biological...
Ground-water quality near the northwest 58th Street solid-waste disposal facility, Dade County, Florida
H. C. Mattraw Jr., John E. Hull, Howard Klein
1978, Water-Resources Investigations Report 78-45
The Northwest 58th Street solid-waste disposal facility, 3 miles west of a major Dade County municipal water-supply well field, overlays the Biscayne aquifer, a permeable, solution-riddled limestone which transmits leachates eastward at a calculated rate of 2.9 feet per day. A discrete, identifiable leachate plume has been recognized under and...
