Effects of ground-water withdrawals on flow in the Sauk River Valley Aquifer and on streamflow in the Cold Spring area, Minnesota
R. J. Lindgren
2001, Water-Resources Investigations Report 2001-4111
The U. S. Geological Survey, in cooperation with the city of Cold Spring, Minnesota conducted a study during 1998-99 to: (1) determine the contributing areas of groundwater flow to high-capacity wells, (2) delineate the 10-, 20-, and 30-year time-of-travel zones to high-capacity wells, and (3) determine changes in streamflow in...
Borehole P- and S-wave velocity at thirteen stations in Southern California
James F. Gibbs, David M. Boore, John C. Tinsley III, Charles S. Mueller
2001, Open-File Report 2001-506
The U.S. Geological Survey (USGS), as part of a program to acquire seismic velocity data at locations of strong-ground motion in earthquakes (e.g., Gibbs et al., 2000), has investigated thirteen additional sites in the Southern California region. Of the thirteen sites, twelve are in the vicinity of Whittier, California, and...
Approach for delineation of contributing areas and zones of transport to selected public-supply wells using a regional ground-water flow model, Palm Beach County, Florida
R.A. Renken, R.D. Patterson, L.L. Orzol, Joann Dixon
2001, Water-Resources Investigations Report 2001-4158
Rapid urban development and population growth in Palm Beach County, Florida, have been accompanied with the need for additional freshwater withdrawals from the surficial aquifer system. To maintain water quality, County officials protect capture areas and determine zones of transport of municipal supply wells. A multistep process was used to...
An interdisciplinary assessment of regional-scale nonpoint source ground-water vulnerability: Theory and application
Richard L. Bernknopf, Laura B. Dinitz, Keith Loague
2001, Professional Paper 1645
An integrated earth science-economics model, developed within a geographic information system (GIS), combines a regional-scale nonpoint source vulnerability assessment with a specific remediation measure to avoid unnecessary agricultural production costs associated with the use of agrochemicals in the Pearl Harbor basin on the island of Oahu, Hawaii. This approach forms...
Hayward Fault rocks: porosity, density, and strength measurements
C.A. Morrow, D.A. Lockner
2001, Open-File Report 2001-421
Porosity, density and strength measurements were conducted on rock samples collected from the Hayward Fault region in Northern California as part of the Hayward Fault Working Group’s efforts to create a working model of the Hayward Fault. The rocks included in this study were both fine and coarse grained gabbros,...
Report for borehole explosion data acquired in the 1999 Los Angeles Region Seismic Experiment (LARSE II), Southern California: Part I, description of the survey
Gary S. Fuis, Janice M. Murphy, David A. Okaya, Robert W. Clayton, Paul M. Davis, Kristina Thygesen, Shirley A. Baher, Trond Ryberg, Mark L. Benthien, Gerry Simila, J. Taylor Perron, Alan K. Yong, Luke Reusser, William J. Lutter, Galen Kaip, Michael D. Fort, Isa Asudeh, Russell Sell, John R. Van Schaack, Edward E. Criley, Ronald Kaderabek, Will M. Kohler, Nickolas H. Magnuski
2001, Open-File Report 2001-408
The Los Angeles Region Seismic Experiment (LARSE) is a joint project of the U.S. Geological Survey (USGS) and the Southern California Earthquake Center (SCEC). The purpose of this project is to produce seismic images of the subsurface of the Los Angeles region down to the depths at which earthquakes occur,...
Water resources of the Lake Traverse Reservation, South and North Dakota, and Roberts County, South Dakota
Ryan F. Thompson
2001, Water-Resources Investigations Report 2001-4219
In 1994, the U.S. Geological Survey, in cooperation with the Sisseton-Wahpeton Sioux Tribe; Roberts County; and the South Dakota Department of Environment and Natural Resources, Geological Survey Program, began a 6-year investigation to describe and quantify the water resources of the area within the 1867 boundary of the Lake Traverse...
Implications for the formation of the Hollywood Basin from gravity interpretations of the northern Los Angeles Basin, California
Thomas G. Hildenbrand, Jeffrey G. Davidson, Daniel J. Ponti, V.E. Langenheim
2001, Open-File Report 2001-394
Gravity data provide insights on the complex tectonic history and structural development of the northern Los Angeles Basin region. The Hollywood basin appears to be a long (> 12 km), narrow (up to 2 km wide) trough lying between the Santa Monica Mountains and the Wilshire arch. In the deepest...
GRA prospectus: optimizing design and management of protected areas
Richard Bernknopf, David Halsing
2001, Open-File Report 2001-404
Protected areas comprise one major type of global conservation effort that has been in the form of parks, easements, or conservation concessions. Though protected areas are increasing in number and size throughout tropical ecosystems, there is no systematic method for optimally targeting specific local areas for protection, designing the protected...
High-resolution seismic reflection/refraction images near the outer margin of the Chesapeake Bay impact crater, York-James Peninsula, southeastern Virginia
R. D. Catchings, D.E. Saulter, D.S. Powars, M. R. Goldman, J.A. Dingler, G. S. Gohn, J.S. Schindler, G.H. Johnson
2001, Open-File Report 2001-407
Powars and Bruce (1999) showed that the Chesapeake Bay region of southeastern Virginia was the site of an asteroid or comet impact during the late Eocene, approximately 35 million years ago (Fig. 1). Initial borehole and marine seismic-reflection data revealed a 90-km-diameter impact structure, referred to as the Chesapeake Bay...
Facies analysis of Tertiary basin-filling rocks of the Death Valley regional ground-water system and surrounding areas, Nevada and California
Donald S. Sweetkind, Christopher J. Fridrich, Emily Taylor
2001, Open-File Report 2001-400
Existing hydrologic models of the Death Valley region typically have defined the Cenozoic basins as those areas that are covered by recent surficial deposits, and have treated the basin-fill deposits that are concealed under alluvium as a single unit with uniform hydrologic properties throughout the region, and with depth. Although...
Mineral potential modelling of gold and silver mineralization in the Nevada Great Basin — A GIS-based analysis using weights of evidence
Mark J. Mihalasky
2001, Open-File Report 2001-291
The distribution of 2,690 gold-silver-bearing occurrences in the Nevada Great Basin was examined in terms of spatial association with various geological phenomena. Analysis of these relationships, using GIS and weights of evidence modelling techniques, has predicted areas of high mineral potential where little or no mining activity exists. Mineral potential...
Assessment of habitat, fish communities, and streamflow requirements for habitat protection, Ipswich River, Massachusetts, 1998-99
David S. Armstrong, Todd A. Richards, Gene W. Parker
2001, Water-Resources Investigations Report 2001-4161
The relations among stream habitat, fish communities, and hydrologic conditions were investigated in the Ipswich River Basin in northeastern Massachusetts. Data were assessed from 27 sites on the mainstem of the Ipswich River from July to September 1998 and from 10 sites on 5 major tributaries in July and August...
Assessment method for epithermal gold deposits in northeast Washington State using weights-of-evidence GIS modeling
D. E. Boleneus, G. L. Raines, J. D. Causey, A. A. Bookstrom, T. P. Frost, P. C. Hyndman
2001, Open-File Report 2001-501
The weights-of-evidence analysis, a quantitative mineral resource mapping tool, is used to delineate favorable areas for epithermal gold deposits and to predict future exploration activity of the mineral industry for similar deposits in a four-county area (222 x 277 km), including the Okanogan and Colville National Forests of northeastern Washington....
A test of a mechanical multi-impact shear-wave seismic source
David M. Worley, Jack K. Odum, Robert A. Williams, William J. Stephenson
2001, Open-File Report 2001-440
We modified two gasoline-engine-powered earth tampers, commonly used as compressional-(P) wave seismic energy sources for shallow reflection studies, for use as shear(S)-wave energy sources. This new configuration, termed ?Hacker? (horizontal Wacker?), is evaluated as an alternative to the manual sledgehammer typically used in conjunction with a large timber held down...
Relation of Mercury to Other Chemical Constituents in Ground Water in the Kirkwood-Cohansey Aquifer System, New Jersey Coastal Plain, and Mechanisms for Mobilization of Mercury from Sediments to Ground Water
Julia L. Barringer, Cecilia L. MacLeod
2001, Water-Resources Investigations Report 2000-4230
Water from 265 domestic wells that tap the unconfined Kirkwood-Cohansey aquifer system in the Coastal Plain of New Jersey contained concentrations of mercury that are equal to or exceed the U.S. Environmental Protection Agency maximum contaminant level (MCL) of 2 ug/L (micrograms per liter). The wells range in depth from...
Landslides triggered by Hurricane Mitch in Guatemala -- inventory and discussion
Robert C. Bucknam, Jeffrey A. Coe, Manuel Mota Chavarria, Jonathan W. Godt, Arthur C. Tarr, Lee-Ann Bradley, Sharon A. Rafferty, Dean Hancock, Richard L. Dart, Margo L. Johnson
2001, Open-File Report 2001-443
The torrential rains that accompanied Hurricane Mitch in October and November of 1998 triggered thousands of landslides in the moderate to steep terrain bordering the Motagua and Polochic Rivers in eastern Guatemala. Using aerial photographs taken between January and March 2000 we mapped all visible landslides larger than about 15 m in minimum dimension in a study area of...
Concentrations and annual fluxes for selected water-quality constituents from the USGS National Stream Quality Accounting Network (NASQAN) 1996-2000
Valerie J. Kelly, Richard P. Hooper, Brent T. Aulenbach, Mary Janet
2001, Water-Resources Investigations Report 2001-4255
This report contains concentrations and annual mass fluxes (loadings) for a broad range of water-quality constituents measured during 1996-2000 as part of the U.S. Geological Survey National Stream Quality Accounting Network (NASQAN). During this period, NASQAN operated a network of 40-42 stations in four of the largest river basins of...
Citizen knowledge and perception of black-tailed prairie dog management: Report to respondents
Natalie R. Sexton, Ayeisha Brinson, Phadrea D. Ponds, Kurt Cline, Berton L. Lamb
2001, Open-File Report 2001-467
What do citizens know about black-tailed prairie dogs, and where do they get their information? When management decisions need to be made regarding an animal such as the black-tailed prairie dog, an understanding of the species and its relationship to humans is necessary. This includes knowing the biology of the...
Geochemistry of the Madison and Minnelusa aquifers in the Black Hills area, South Dakota
Cheryl A. Naus, Daniel G. Driscoll, Janet M. Carter
2001, Water-Resources Investigations Report 2001-4129
The Madison and Minnelusa aquifers are two of the most important aquifers in the Black Hills area because of utilization for water supplies and important influences on surface-water resources resulting from large springs and streamflow- loss zones. Examination of geochemical information provides a better understanding of the complex flow systems...
Map and map database of susceptibility to slope failure by sliding and earthflow in the Oakland area, California
R.J. Pike, R. W. Graymer, Sebastian Roberts, N.B. Kalman, Steven Sobieszczyk
2001, Miscellaneous Field Studies Map 2385
Map data that predict the varying likelihood of landsliding can help public agencies make informed decisions on land use and zoning. This map, prepared in a geographic information system from a statistical model, estimates the relative likelihood of local slopes to fail by two processes...
The search for reliable aqueous solubility (Sw) and octanol-water partition coefficient (Kow) data for hydrophobic organic compounds; DDT and DDE as a case study
James Pontolillo, R.P. Eganhouse
2001, Water-Resources Investigations Report 2001-4201
The accurate determination of an organic contaminant’s physico-chemical properties is essential for predicting its environmental impact and fate. Approximately 700 publications (1944–2001) were reviewed and all known aqueous solubilities (Sw) and octanol-water partition coefficients (Kow) for the organochlorine pesticide, DDT, and its persistent metabolite, DDE were compiled and examined. Two...
Water budget for the Nueces Estuary, Texas, May-October 1998
D.J. Ockerman
2001, Fact Sheet 081-01
The Texas Water Development Board (TWDB), Texas Parks and Wildlife Department (TPWD), and Texas Natural Resource Conservation Commission (TNRCC) are charged by the Texas Legislature with determining freshwater inflows required to maintain the ecological health of streams, bays, and estuaries in Texas. To determine required inflows, the three agencies collect...
Mercury in U.S. coal; abundance, distribution, and modes of occurrence
Susan J. Tewalt, Linda J. Bragg, Robert B. Finkelman
2001, Fact Sheet 095-01
The U.S. Geological Survey (USGS) has compiled a nationwide coal information database over the last 25 years. A subset of the data, called COALQUAL, contains analyses of over 7,000 coal samples that have been collected or calculated to represent the entire thickness of a coal bed in the ground. The...
Economic and environmental evaluations of extractable coal resources conducted by the U. S. Geological Survey
M.S. Ellis, T.J. Rohrbacher, M.D. Carter, C. L. Molnia, L. M. Osmonson, D.C. Scott
2001, Fact Sheet 109-01
The Economic and Environmental Evaluations of Extractable Coal Resources (E4CR) project integrates economic analyses of extractable coal resources with environmental and coal quality considerations in order to better understand the contribution that coal resources can make to help meet the Nation’s future energy needs. The project utilizes coal resource information...
