Geologic map and map database of the Spreckels 7.5-minute Quadrangle, Monterey County, California
Joseph C. Clark, Earl E. Brabb, Lewis I. Rosenberg, Heather V. Goss, Sarah E. Watkins
2001, Miscellaneous Field Studies Map 2349
Introduction The Spreckels quadrangle lies at the north end of the Sierra de Salinas and extends from the Salinas Valley on the northeast across Los Laurelles Ridge south to Carmel Valley, an intermontane valley that separates the Santa Lucia Range from the Sierra de Salinas (fig. 1). The Toro Regional Park...
Geologic Map of the Lavinia Planitia Quadrangle (V-55), Venus
Mikhail A. Ivanov, James W. Head III
2001, IMAP 2684
Introduction The Lavinia Planitia quadrangle (V-55) is in the southern hemisphere of Venus and extends from 25 to 50 south latitude and from 330 to 360 longitude. It covers the central and northern part of Lavinia Planitia and parts of its margins. Lavinia Planitia consists of a centralized, deformed lowland flooded...
Simulation of ground-water discharge to Biscayne Bay, southeastern Florida
Christian D. Langevin
2001, Water-Resources Investigations Report 2000-4251
As part of the Place-Based Studies Program, the U.S. Geological Survey initiated a project in 1996, in cooperation with the U.S. Army Corps of Engineers, to quantify the rates and patterns of submarine ground-water discharge to Biscayne Bay. Project objectives were achieved through field investigations at three sites (Coconut Grove,...
National Hydrography Dataset (NHD)
Water Resources Division, U.S. Geological Survey
2001, Report
The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000 scale and exists at that scale for the whole country. High resolution NHD adds...
Ground-water flow and quality in the Atlantic City 800-foot sand, New Jersey
Steven D. McAuley, Julia L. Barringer, Gary N. Paulachok, Jeffrey S. Clark, Otto S. Zapecza
2001, New Jersey Geological Survey Report GSR 41
The regional, confined Atlantic City 800-foot sand is the principal source of water supply for coastal communities of southern New Jersey. In response to extensive use of the aquifer--nearly 21 million gallons per day in 1986--water levels have declined to about 100 feet below sea level near Atlantic City and...
A field and statistical modeling study to estimate irrigation water use at Benchmark Farms study sites in southwestern Georgia, 1995-96
Julia L. Fanning, Gregory E. Schwarz, William C. Lewis
2001, Water-Resources Investigations Report 2000-4292
A benchmark irrigation monitoring network of farms located in a 32-county area in southwestern Georgia was established in 1995 to improve estimates of irrigation water use. A stratified random sample of 500 permitted irrigators was selected from a data base--maintained by the Georgia Department of Natural Resources, Georgia Environmental Protection...
Quaternary geology, Cold Bay and False Pass quadrangles, Alaska Peninsula
Frederic H. Wilson, Florence R. Weber
2001, Report, Geologic studies in Alaska by the U.S. Geological Survey, 1999
Recent mapping and interpretation of Quaternary geologic features has improved our understanding of the interaction between volcanic, glacial, and tectonic activity in the Cold Bay and False Pass 1:250,000-scale quadrangles on the Alaska Peninsula. The glacial and volcanic record of the map area strongly suggests that continental-shelf glaciations and two...
Seismic tomography shows that upwelling beneath Iceland is confined to the upper mantle
G.R. Foulger, M.J. Pritchard, B.R. Julian, J.R. Evans, R. M. Allen, G. Nolet, W. J. Morgan, B. H. Bergsson, P. Erlendsson, S. Jakobsdottir, S. Ragnarsson, R. Stefansson, K. Vogfjord
2001, Geophysical Journal International (146) 504-530
We report the results of the highest-resolution teleseismic tomography study yet performed of the upper mantle beneath Iceland. The experiment used data gathered by the Iceland Hotspot Project, which operated a 35-station network of continuously recording, digital, broad-band seismometers over all of Iceland 1996-1998. The structure of the upper mantle...
Elevated carbon dioxide flux at the Dixie Valley geothermal field, Nevada; relations between surface phenomena and the geothermal reservoir
D. Bergfeld, F. Goff, C. J. Janik
2001, Chemical Geology (177) 43-66
In the later part of the 1990s, a large die-off of desert shrubs occurred over an approximately 1 km2 area in the northwestern section of the Dixie Valley (DV) geothermal field. This paper reports results from accumulation-chamber measurements of soil CO2 flux from locations in the dead zone and stable...
Time series of suspended-solids concentration, salinity, temperature, and total mercury concentration in San Francisco Bay during water year 1998
Catherine A. Ruhl, David H. Schoellhamer
2001, Report
Many physical processes affect how constituents within San Francisco Bay vary. Processes and their associated time scales include turbulence (seconds), semidiurnal and diurnal tides (hours), the spring-neap tidal cycle (days), freshwater flow (weeks), seasonal winds (months), ecological and climatic changes (years), and geologic changes (thousands of years). Continuous time series...
Water resources data Texas, water year 2000, volume 5. Guadalupe River basin, Nueces River basin, Rio Grande basin, and intervening coastal basins
S. C. Gandara, W.J. Gibbons, D.L. Barbie
2001, Water Data Report TX-00-5
Water-resources data for the 2000 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water-quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 5 contains records for...
Water resources data Texas, water year 2000, volume 4. Colorado River basin, Lavaca River basin, and intervening coastal basins
S. C. Gandara, W.J. Gibbons, D.L. Barbie
2001, Water Data Report TX-00-4
Water-resources data for the 2000 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water-quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 4 contains records for...
Water resources data Texas, water year 2000, volume 3. San Jacinto River basin, Brazos River basin, San Bernard River basin, and intervening coastal basins
S. C. Gandara, W.J. Gibbons, D.L. Barbie
2001, Water Data Report TX-00-3
Water-resources data for the 2000 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 3 contains records...
Hydrology of the coastal springs ground-water basin and adjacent parts of Pasco, Hernando, and Citrus Counties, Florida
Lari A. Knochenmus, Dann K. Yobbi
2001, Water-Resources Investigations Report 2001-4230
The coastal springs in Pasco, Hernando, and Citrus Counties, Florida consist of three first-order magnitude springs and numerous smaller springs, which are points of substantial ground-water discharge from the Upper Floridan aquifer. Spring flow is proportional to the water-level altitude in the aquifer and is affected primarily by the magnitude...
Lead-rich sediments, Coeur d'Alene River Valley, Idaho: area, volume, tonnage, and lead content
Arthur A. Bookstrom, Stephen E. Box, Julie K. Campbell, Kathryn I. Foster, Berne L. Jackson
2001, Open-File Report 2001-140
In north Idaho, downstream from the Coeur d?Alene (CdA) silver-lead-zinc mining district, lead-rich sediments, containing at least 1,000 ppm of lead, cover approximately 61 km2 (or 73 percent) of the 84-km2 floor of the CdA River valley, from the confluence of its North and South Forks to the top of its delta-front slope,...
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...
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...
Surface-water, water-quality, and ground-water assessment of the Municipio of Comerio, Puerto Rico, 1997-99
Jesús Rodríguez-Martínez, Fernando Gómez-Gómez, Luis Santiago-Rivera, M. L. Oliveras-Feliciano
2001, Water-Resources Investigations Report 2001-4083
To meet the increasing need for a safe and adequate supply of water in the municipio of Comerio, an integrated surface-water, water-quality, and ground-water assessment of the area was conducted. The major results of this study and other important hydrologic and water-quality features were compiled in a Geographic Information System,...
Surface-water, water-quality, and ground-water assessment of the Municipio of Carolina, Puerto Rico, 1997-99
Jesús Rodríguez-Martínez, Fernando Gómez-Gómez, Luis Santiago-Rivera, M. L. Oliveras-Feliciano
2001, Water-Resources Investigations Report 2001-4267
To meet the increasing need for a safe and adequate supply of water in the municipio of Carolina, an integrated surface-water, water-quality, and ground-water assessment of the area was conducted. The major results of this study and other important hydrologic and water-quality features were compiled in a Geographic Information System...
Water resources data Texas, water year 2000, volume 1. Arkansas River basin, Red River basin, Sabine River basin, Neches River basin, and intervening coastal basins
S. C. Gandara, W.J. Gibbons, D.L. Barbie
2001, Water Data Report TX-00-1
Water-resources data for the 2000 water year for Texas are presented in six volumes, and consist of records of stage, discharge, and water quality of streams and canals; stage, contents, and water-quality of lakes and reservoirs; and water levels and water quality of ground-water wells. Volume 1 contains records for...
Water resources data, Maryland, Delaware, and Washington, D.C., water year 2000, volume 1. surface-water data
Robert W. James Jr., Richard W. Saffer, Anthony J. Tallman
2001, Water Data Report MD-DE-DC-00-1
Water resources data for the 2000 water year for Maryland and Delaware consist of records of stage, discharge, and water quality of streams; stage and contents of lakes and reservoirs. This volume (Volume 1. Surface-Water Data) contains records for water discharge at 121 gaging stations; stage and contents of 1...
Water Resources Data, Colorado, Water Year 2000--Volume 1. Missouri River Basin, Arkansas River Basin, and Rio Grande Basin
R.M. Crowfoot, J.W. Unruh, R.D. Steger, G. B. O’Neill
2001, Water Data Report CO-00-1
Water-resources data for Colorado for the 2000 water year consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; meteorological data; and water levels and water quality of wells and springs. This report (Volumes 1 and 2) contains discharge records...
Water Resources Data, Kansas, Water Year 2000
J.E. Putnam, D.L. Lacock, D.R. Schneider, M.D. Carlson
2001, Water Data Report KS-00-1
Water-resources data for the 2000 water year for Kansas consist of records of stage, discharge, and water quality of streams; elevation and contents of lakes and reservoirs; and water levels of ground-water wells. This report contains records for water discharge at 144 complete-record gaging stations; elevation and contents at 19...
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...
Structural controls on ground-water conditions and estimated aquifer properties near Bill Williams Mountain, Williams, Arizona
Herbert A. Pierce
2001, Water-Resources Investigations Report 2001-4058
As of 1999, surface water collected and stored in reservoirs is the sole source of municipal water for the city of Williams. During 1996 and 1999, reservoirs reached historically low levels. Understanding the ground-water flow system is critical to managing the ground-water resources in this part of the Coconino Plateau....
