Evaluation of future base-flow water-quality conditions in the Hillsborough River, Florida
Mario Fernandez Jr., C. L. Goetz, J.E. Miller
1984, Water-Resources Investigations Report 83-4182
A one-dimensional, steady-state, water-quality model was developed for a 30.0 mile reach of the Hillsborough River to evaluate water-quality conditions to be expected from future development. The model was calibrated and verified using data collected under critical base-flow conditions in April and December 1978. Dissolved organic nitrogen, nitrate nitrogen, and...
Analysis of the Carmel Valley alluvial ground-water basin, Monterey County, California
Glenn W. Kapple, Hugh T. Mitten, Timothy J. Durbin, Michael J. Johnson
1984, Water-Resources Investigations Report 83-4280
A two-dimensional, finite-element, digital model was developed for the Carmel Valley alluvial ground-water basin using measured, computed, and estimated discharge and recharge data for the basin. Discharge data included evapotranspiration by phreatophytes and agricultural, municipal, and domestic pumpage. Recharge data included river leakage, tributary runoff, and pumping return flow. Recharge...
Cost effectiveness of the stream-gaging program in northeastern California
S.H. Hoffard, V.F. Pearce, Gary D. Tasker, W.H. Doyle
1984, Water-Resources Investigations Report 84-4127
Results are documented of a study of the cost effectiveness of the stream-gaging program in northeastern California. Data uses and funding sources were identified for the 127 continuous stream gages currently being operated in the study area. One stream gage was found to have insufficient data use to warrant cooperative...
Preliminary study of the aquifers of the lower Mesilla Valley in Texas and New Mexico by model simulation
J. S. Gates, D. E. White, E. R. Leggat
1984, Water-Resources Investigations Report 84-4317
The aquifers in the lower Mesilla Valley of Texas and New Mexico provide water for irrigation, industrial use, and municipal supply. At present (1984), the shallow aquifer is used principally for irrigation. The medium-depth aquifer (the top of which is about 160 to 260 feet below land surface) and deep...
The evolution of the southern California uplift, 1955 through 1976
Robert O. Castle, Michael R. Elliot, Jack P. Church, Spencer H. Wood
1984, Professional Paper 1342
The southern California uplift culminated in 1974 as a 150- km-wide crustal swell that extended about 600 km eastward and east-southeastward from Point Arguello to the Colorado River and Salton Sea, respectively; it was characterized by remarkably uniform height changes between 1959 and 1974 of 0.30-0.35 m over at least...
Hydrologic data; North Canadian River from Lake Overholser to Lake Eufaula, central Oklahoma
J.S. Havens
1984, Open-File Report 84-808
The data contained in this report were gathered during the period 1982 to 1984 for use in constructing a digital model of the North Canadian River from Lake Overholser, in the western part of Oklahoma City, to Lake Eufaula, in eastern Oklahoma. Locations of test holes and sampling sites are...
Water-table contours, directions of ground-water movement, and measurements of inflow to American Falls Reservoir, southeastern Idaho, April 1984
H.W. Young
1984, Water-Resources Investigations Report 84-4269
In 1978 the U.S. Geological Survey began a 5-year study of the High Plains regional aquifer system to provide hydrologic information for evaluating the effects of long-term development of the aquifer and to develop a capability for predicting aquifer response to alternative changes in ground-water management. By use of a...
The effect of eustatic sea-level changes on saltwater-freshwater relations in the northern Atlantic Coastal Plain
Harold Meisler, P. Patrick Leahy, LeRoy L. Knobel
1984, Water Supply Paper 2255
A finite-difference computer model was used to analyze the effect of eustatic sea-level changes on the development of the transition zone between fresh ground water and underlying saltwater in the northern Atlantic Coastal Plain. The model simulates, in cross section, the sedimentary wedge from the Delaware River estuary in New...
Habitat Suitability Index models and Instream Flow Suitability curves: brown trout
Robert F. Raleigh, Laurence D. Zuckerman, Patrick C. Nelson
1984, FWS/OBS 82/10.71
Estimation of the sensitivity of CSEM coupling to coil movement and resistivity changes of simple models
Jim Kauahikaua
1984, Open-File Report 84-645
Methods for the collection of geochemical data from the sediments of the tidal Potomac River and estuary and data for 1978-1980
S.D. Goodwin, B.I. Schultz, D.L. Parkhurst, N.S. Simon, Edward Callender
1984, Open-File Report 84-74
The chemical composition of bottom sediments and their associated pore waters from the tidal Potomac River and Estuary was studied from May 1978 through June 1980. Pore waters were routinely analyzed for pH, Eh, alkalinity, and concentrations of sulfide, sulfate, phosphate, carbon, ammonium, silica, iron, manganese, chloride, sodium, potassium, calcium,...
Earth and water resources and hazards in Central America
Charles G. Cunningham, R.W. Fary, Marianne Guffanti, Della Laura, M. P. Lee, C.D. Masters, R. L. Miller, Ferdinand Quinones-Marquez, R.W. Peebles, J.A. Reinemund, D. P. Russ
1984, Circular 925
Long-range economic development in Central America will depend in large part on production of indigenous mineral, energy, and water resources and on mitigation of the disastrous effects of geologic and hydrologic hazards such as landslides, earthquakes, volcanic eruptions, and floods. The region has six world-class metal mines at present as...
Preliminary map showing limonitic areas in the Silver City 1 degree by 2 degrees Quadrangle, Arizona and New Mexico
Gary L. Raines
1984, Miscellaneous Field Studies Map 1183-Q
This map is a part of a folio of maps of the Silver City 1o x 2o quadrangle, Arizona and New Mexico, prepared under the Conterminous United States Mineral Assessment Program. As a part of this study Landstat images were used to map the anomalous areas of limonitic materials as...
Sediment transport by irrigation return flows in four small drains within the DID-18 drainage of the Sulphur Creek basin, Yakima County, Washington, April 1979 to October 1981
P. R. Boucher
1984, Water-Resources Investigations Report 83-4167
Suspended sediment, water discharges, and water temperatures were monitored in four small drains in the DID-18 basin of the Sulphur Creek basin, a tributary to the Yakima River, Washington. Water outflow, inflow, and miscellaneous sites were also monitored. The information was used to evaluate the effectiveness of management practices in...
Floods of October 1977 in southern Arizona and March 1978 in central Arizona
Byron Neil Aldridge, James H. Eychaner
1984, Water Supply Paper 2223
Major floods occurred in October 1977 and March 1978 in Arizona. As much as 14 inches of rain fell during October 6-9, 1977, over the mountains of southern Arizona and northern Mexico resulting in the highest discharge since at least 1892 on the Santa Cruz River upstream from Tucson. The...
Simulated ground-water flow in the Potomac aquifers, New Castle County, Delaware
Mary Martin
1984, Water-Resources Investigations Report 84-4007
Flow in three aquifers of the Potomac Formation in New Castle County, Delaware, was simulated. Results of the calibrated flow model show the maximum transmissivity of the lower aquifer is between 1,000 and 1,500 square feet per day; the middle aquifer, between 3,000 and 3,500 square feet per day; and...
Finite-element simulation of ground-water flow in the vicinity of Yucca Mountain, Nevada-California
J.B. Czarnecki, R. K. Waddell
1984, Water-Resources Investigations Report 84-4349
A finite-element model of the groundwater flow system in the vicinity of Yucca Mountain at the Nevada Test Site was developed using parameter estimation techniques. The model simulated steady-state ground-water flow occurring in tuffaceous, volcanic , and carbonate rocks, and alluvial aquifers. Hydraulic gradients in the modeled area range from...
Vertical crustal movements in Southern California, 1974 to 1978
Robert O. Burford, Thomas D. Gilmore
1984, Circular 905
An extensive resurvey of most of the first-order leveling network in southern California, known as the Southern California Releveling Program (SCRP), was carried out during the first 5 months of 1978. The primary scientific purpose of these measurements was to rapidly update the vertical control record throughout a recently uplifted...
A modification of the finite-difference model for simulation of two dimensional ground-water flow to include surface-ground water relationships
M.M. Ozbilgin, D.C. Dickerman
1984, Water-Resources Investigations Report 83-4251
The two-dimensional finite-difference model for simulation of groundwater flow was modified to enable simulation of surface-water/groundwater interactions during periods of low streamflow. Changes were made to the program code in order to calculate surface-water heads for, and flow either to or from, contiguous surface-water bodies; and to allow for more...
Ground-water resources of the Mattapoisett River aquifer, Plymouth County, Massachusetts: Summary for water-resource managers
Virginia De Lima, Julio C. Olimpio
1984, Water-Resources Investigations Report 84-4023
Proposed increases in municipal pumpage in the Mattapoisett River valley will triple ground-water withdrawals in the next two decades. Because of State and local concern about the long-term effects of these withdrawals on ground-water levels and streamflow, a digital ground-water-flow model was developed to assist water-resource management. Ten development scenarios...
Statistical models for estimating flow characteristics of Michigan streams
D. J. Holtschlag, H.M. Croskey
1984, Water-Resources Investigations Report 84-4207
Multiple-regression equations were developed to estimate flow characteristics at ungaged sites. Several readily measureable basin characteristics and an areal adjustment factor are required in the equations. Equations have been prepared to estimate mean and mean monthly flow, flow duration, low flow, peak flow, and flood volume. The precision of the...
Habitat Suitability Index Models and Instream Flow Suitability Curves: Brown trout
Robert F. Raleigh, Laurence D. Zuckerman, Patrick C. Nelson
1984, FWS/OBS 82/10.124
The Habitat Suitability Index (HSI) models presented in this publication aid in identifying important habitat variables for brown trout (Salmo trutto Linneas). Facts, ideas, and concepts obtained from the research literature and expert reviews are synthesized and presented in a format that can be used for impact assessment. A brief discussion...
Numerical simulation of the High Plains regional aquifer, northwestern Oklahoma
J.S. Havens, S. C. Christenson
1984, Water-Resources Investigations Report 83-4269
The High Plains aquifer consists of the Tertiary Ogallala Formation and overlying Quaternary alluvium and terrace deposits together with parts of underlying rocks. Before extensive irrigation in the 1960's, recharge from precipitation was balanced by natural discharge. Baseflow was estimated as approximately 118 cubic feet per second in 1980. A...
Habitat Suitability Index Models: Lake trout (exclusive of the Great Lakes)
Michael D. Marcus, Wayne A. Hubert, Stanley H. Anderson
1984, FWS/OBS 82/10.84
The lake trout is an important commercial and sport fish in North America. In the Central Rocky Mountain regi on, 1ake trout are common ly referred to as "mackinaw". There is good evidence that lake trout should be called "1 ake charr" (Morton 1980). No subspecies of lake trout is...
An assessment of cumulative impacts of coal mining on the hydrology in part of the Powder River structural basin, Wyoming: A progress report
P. R. Jordan, R. M. Bloyd, P. B. Daddow
1984, Water-Resources Investigations Report 83-4235
The U.S. Geological Survey and the Wyoming Department of Environmental Quality are involved in a cooperative effort to assess the probable cumulative impacts of coal mining on the hydrology of a part of the Powder River Structural Basin in Wyoming. It was assumed that the principal impacts on the ground-water...
