Digital data used to relate nutrient input to water quality in the Chesapeake Bay watershed
John W. Brakebill, Stephen D. Preston, Sarah K. Martucci
2001, Open-File Report 2001-251
Digital data sets compiled by the U.S. Geological Survey were used as input for a collection of Spatially Referenced Regressions On Watershed (SPARROW) attributes for the Chesapeake Bay region including parts of Delaware, Maryland, New York, Pennsylvania, Virginia, West Virginia, and the District of Columbia. These regressions use a nonlinear...
Simulated ground-water flow and water quality of the Mississippi River alluvium near Burlington, Iowa, 1999
Robert A. Boyd
2001, Water-Resources Investigations Report 2000-4274
The City of Burlington, Iowa, obtains some of its public water supply by withdrawing ground water from the Mississippi River alluvium, an alluvial aquifer adjacent to the Mississippi River. The U.S. Geological Survey, in cooperation with the City of Burlington, conducted a hydrologic study of the Mississippi River alluvium near...
Hydrology of C-3 watershed, Seney National Wildlife Refuge, Michigan
Michael J. Sweat
2001, Water-Resources Investigations Report 2001-4053
Proposed changes to watershed management practices near C-3 Pool at Seney National Wildlife Refuge will affect surface-water flow patterns, ground-water levels, and possibly local plant communities. Data were collected between fall 1998 and spring 2000 to document existing conditions and to assess potential changes in hydrology that might occur as...
The Evolution of the Lower Missouri River: Preliminary Results of NMD Research at Lisbon Bottom
Jeffrey Spooner
2001, Open-File Report 2001-368
The purpose of this investigation is to determine the relationship between the geomorphology of Lisbon Bottom and the spatial and temporal distribution of its wetlands. The project is focused specifically on the Quaternary geology of the river valley and the relationship between the valley's alluvial architecture and the hydrogeology of...
Simulations of flooding on the Tennessee River in the vicinity of U.S. Highway 231 near Huntsville, Alabama
T. Scott Hedgecock
2001, Water-Resources Investigations Report 2001-4114
A two-dimensional finite-element surface-water model was used to study the effects of proposed modifications to the U.S. Highway 231 corridor on water-surface elevations and flow distributions during flooding in the Tennessee River Basin south of Huntsville, Madison County, Alabama. Flooding was first simulated for the March 19, 1973, flood for...
Model simulation of the Manasquan water-supply system in Monmouth County, New Jersey
Ming Chang, Gary D. Tasker, Steven Nieswand
2001, Water-Resources Investigations Report 2001-4172
Model simulation of the Manasquan Water Supply System in Monmouth County, New Jersey, was completed using historic hydrologic data to evaluate the effects of operational and withdrawal alternatives on the Manasquan reservoir and pumping system. Changes in the system operations can be simulated with the model using precipitation forecasts. The Manasquan...
Gore Creek watershed, Colorado — Assessment of historical and current water quantity, water quality, and aquatic ecology, 1968–98
Kirby H. Wynn, Nancy J. Bauch, Nancy E. Driver
2001, Water-Resources Investigations Report 99-4270
The historical and current (1998) water-quantity, water-quality, and aquatic-ecology conditions in the Gore Creek watershed are described as part of a study by the U.S. Geological Survey, done in cooperation with the Town of Vail, the Eagle River Water and Sanitation District, and the Upper Eagle Regional Water Authority. Interpretation...
Assessment of water-quality conditions in the J.B. Converse Lake watershed, Mobile County, Alabama, 1990-98
Celeste A. Journey, Amy C. Gill
2001, Water-Resources Investigations Report 2001-4225
J.B. Converse (Converse) Lake is a 3,600-acre, tributary-storage reservoir in Mobile County, southwestern Alabama. The lake serves as the primary drinking-water supply for the city of Mobile. The Converse Lake watershed lies within the Coastal Plain Physiographic Province. Semiconsolidated to unconsolidated sediments of sand, silt, gravel, and clay underlie the...
Geologic framework of the San Juan structural basin of New Mexico, Colorado, Arizona, and Utah, with emphasis on Triassic through Tertiary rocks
Steven D. Craigg
2001, Professional Paper 1420
The San Juan Basin Regional Aquifer-System Analysis began in 1984. This report describes rocks of Triassic through Tertiary age in the basin and also describes the regional geologic and stratigraphic framework of the basin's multilayered aquifer system. Maps showing altitude of top, depth to top, and thickness of major geologic...
Geochemistry and origins of mineralized waters in the Floridan aquifer system, northeastern Florida
G. G. Phelps
2001, Water-Resources Investigations Report 2001-4112
Increases in chloride concentration have been observed in water from numerous wells tapping the Floridan aquifer system in northeastern Florida. Although most increases have been in the eastern part of Duval County, Florida, no spatial pattern in elevated chloride concentrations is discernible. Possible sources of the mineralized water include modern...
Evapotranspiration from a cypress and pine forest subjected to natural fires, Volusia County, Florida, 1998-99
D. M. Sumner
2001, Water-Resources Investigations Report 2001-4245
Daily values of evapotranspiration from a watershed in Volusia County, Florida, were estimated for a 2-year period (January 1998 through December 1999) by using an energy-budget variant of the eddy correlation method and a Priestley-Taylor model. The watershed consisted primarily of pine flatwood uplands interspersed within cypress wetlands. A drought-induced...
Hydraulic-property estimates for use with a transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California
Wayne R. Belcher, Peggy E. Elliott, Arthur L. Geldon
2001, Water-Resources Investigations Report 2001-4210
The Death Valley regional ground-water flow system encompasses an area of about 43,500 square kilometers in southeastern California and southern Nevada, between latitudes 35? and 38?15' north and longitudes 115? and 117?45' west. The study area is underlain by Quaternary to Tertiary basin-fill sediments and mafic-lava flows; Tertiary volcanic, volcaniclastic,...
Ground-water quality, Cook Inlet Basin, Alaska, 1999
Roy L. Glass
2001, Water-Resources Investigations Report 2001-4208
As part of the U.S. Geological Survey?s National Water-Quality Assessment Program, ground-water samples were collected from 34 existing wells in the Cook Inlet Basin in south-central Alaska during 1999. All ground-water samples were from aquifers composed of glacial or alluvial sediments. The water samples were used to determine the occurrence...
An alternative regionalization scheme for defining nutrient criteria for rivers and streams
Dale M. Robertson, David A. Saad, Ann M. Wieben
2001, Water-Resources Investigations Report 2001-4073
To protect and manage rivers and streams (hereafter, collectively referred to as streams) in the United States, the U.S. Environmental Protection Agency (USEPA) is establishing regionally based nutrient criteria that reflect the natural variability in water quality. As a basic approach to establish these criteria, the USEPA has divided the...
Lahar Hazards at Concepción volcano, Nicaragua
J.W. Vallance, S. P. Schilling, G. Devoli, M.M. Howell
2001, Open-File Report 2001-457
Concepción is one of Nicaragua’s highest and most active volcanoes. The symmetrical cone occupies the northeastern half of a dumbbell shaped island called Isla Ometepa. The dormant volcano, Maderas, occupies the southwest half of the island. A narrow isthmus connects Concepción and Maderas volcanoes. Concepción volcano towers more than 1600...
Application of Telescopic Mesh Refinement to a Regional Model to Simulate Ground-water Flow in Webberville, Michigan
Carol L. Luukkonen
2001, Water-Resources Investigations Report 2001-4006
Use of a watershed-modeling approach to assess hydrologic effects of urbanization, North Fork Pheasant Branch basin near Middleton, Wisconsin
Jeffrey J. Steuer, R. J. Hunt
2001, Water-Resources Investigations Report 2001-4113
The North Fork Pheasant Branch Basin in Dane County, Wisconsin is expected to undergo development. There are concerns that development will adversely affect water resources with increased flood peaks, increased runoff volumes, and increased pollutant loads. To provide a scientific basis for evaluating the hydrologic system response to development the...
Simulation of flow and evaluation of bridge scour at Horse Island Chute Bridge near Chester, Illinois
Richard J. Huizinga, Paul H. Rydlund Jr.
2001, Water-Resources Investigations Report 2001-4176
The evaluation of scour at bridges throughout the State of Missouri has been ongoing since 1991, and most of these evaluations have used one-dimensional hydraulic analysis and application of conventional scour depth equations. Occasionally, the conditions of a site dictate that a more thorough hydraulic assessment is required. To provide...
Simulated effects of pumping irrigation wells on ground-water levels in western Saginaw County, Michigan
Christopher J. Hoard, David B. Westjohn
2001, Water-Resources Investigations Report 2001-4227
Success of agriculture in many areas of Michigan relies on withdrawal of large quantities of ground water for irrigation. In some areas of the State, water-level declines associated with large ground-water withdrawals may adversely affect nearby residential wells. Residential wells in several areas of Saginaw County, in Michigan's east-central Lower...
River and Reservoir Operations Model, Truckee River basin, California and Nevada, 1998
Steven N. Berris, Glen W. Hess, Larry R. Bohman
2001, Water-Resources Investigations Report 2001-4017
The demand for all uses of water in the Truckee River Basin, California and Nevada, commonly is greater than can be supplied. Storage reservoirs in the system have a maximum effective total capacity equivalent to less than two years of average river flows, so longer-term droughts can result in substantial...
Ground-water flow in the shallow aquifer system at the Naval Weapons Station Yorktown, Virginia
Barry S. Smith
2001, Water-Resources Investigations Report 2000-4077
The Environmental Directorate of the Naval Weapons Station Yorktown, Virginia, is concerned about possible contamination of ground water at the Station. Ground water at the Station flows through a shallow system of layered aquifers and leaky confining units. The units of the shallow aquifer system are the Columbia aquifer, the...
Map Showing Susceptibility to Earthquake-Induced Landsliding, San Juan Metropolitan Area, Puerto Rico
Marilyn Santiago, Matthew C. Larsen
2001, Open-File Report 2001-39
Analysis of slope angle and rock type using a geographic information system indicates that about 68 percent of the San Juan metropolitan area has low to no susceptibility to earthquake-induced landslides. This is at least partly due to the fact that 45 percent of the San Juan metropolitan area is...
Use of a precipitation-runoff model to simulate natural streamflow conditions in the Methow River basin, Washington
David Matthew Ely, John C. Risley
2001, Water-Resources Investigations Report 2001-4198
Management of the water resources of the Methow River Basin is changing in response to the listing of three species of fish under the Endangered Species Act and the Washington State-legislated watershed-planning process. Management options must be considered that minimize adverse effects on people but meet instream flow needs for...
Simulation of ground water flow in the Glaciofluvial, Saginaw, Parma-Bayport, and Marshall Aquifers, Central Lower Peninsula of Michigan
John Robert Hoaglund III, G.C. Huffman, N.J. Granneman
2000, Open-File Report 2000-504
A steady-state finite difference model was developed to simulate ground-water flow in four regional aquifers in Michigan’s Lower Peninsula. The Glaciofluvial, Saginaw, Parma-Bayport, and Marshall aquifers were simulated as layers 1 through 4, respectively, in the model. Separately calculated vertical conductances input to the model were used to simulate the...
Integration of a numerical model and remotely sensed data to study urban/rural land surface climate processes
Limin Yang
2000, Computers & Geosciences (26) 451-468
Simulation of urban/rural land surface climate processes using boundary layer climate models requires accurate input data with regard to surface thermal and radiative properties. The research reported here resulted in development of a procedure to integrate the satellite-derived surface biophysical parameters with a boundary layer climate model for simulating spatial...
