Preliminary geologic map of the Mint Canyon 7.5' quadrangle, southern California: A digital database
R.F. Yerkes
1997, Open-File Report 97-164
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map...
Preliminary geologic map of the Burbank 7.5' quadrangle, southern California: A digital database
R.F. Yerkes
1997, Open-File Report 97-166
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map...
Sequestration of hydrophobic organic contaminants by geosorbents
Richard G. Luthy, George R. Aiken, Mark L. Brusseau, Scott D. Cunningham, Philip M. Gschwend, Joseph J. Pignatello, Martin Reinhard, Samuel J. Traina, Walter J. Weber Jr., John C. Westall
1997, Environmental Science & Technology (31) 3341-3347
The chemical interactions of hydrophobic organic contaminants (HOCs) with soils and sediments (geosorbents) may result in strong binding and slow subsequent release rates that significantly affect remediation rates and endpoints. The underlying physical and chemical phenomena potentially responsible for this apparent sequestration of HOCs by geosorbents are not well understood....
Video evaluation of passage efficiency of American shad and sea lamprey in a modified ice harbor fishway
A. Haro, B. Kynard
1997, North American Journal of Fisheries Management (17) 981-987
Movement and behavior of adult American shad Alosa sapidissima and sea lamprey Petromyzon marinus were monitored by closed-circuit video at several locations within a modified Ice Harbor fishway. American shad ascended and descended the fishway exclusively by surface weirs, while sea lampreys used both surface weirs and submerged orifices. Upstream movement of American shad...
Dimensionality of ground water flow models
S. A. Leake, P.A. Mock
1997, Ground Water (35) 930-930
Hydrogeology and simulation of ground-water flow in the thick regolith-fractured crystalline rock aquifer system of Indian Creek basin, North Carolina
Charles C. Daniel, Douglas G. Smith, Jo Leslie Eimers
1997, Water Supply Paper 2341-C
The Indian Creek Basin in the southwestern Piedmont of North Carolina is one of five type areas studied as part of the Appalachian Valleys-Piedmont Regional Aquifer-System analysis. Detailed studies of selected type areas were used to quantify ground-water flow characteristics in various conceptual hydrogeologic terranes. The conceptual hydrogeologic terranes are...
Documentation of a computer program to estimate the head in a well of finite radius using the U.S. Geological Survey modular finite difference ground-water flow model
Michael Planert
1997, Open-File Report 96-651-A
Study of nonpoint source nutrient loading in the Patuxent River basin, Maryland
S. D. Preston
1997, Water-Resources Investigations Report 96-4273
Study of nonpoint-source (NPS) nutrient loading in Maryland has focused on the Patuxent watershed because of its importance and representativeness of conditions in the State. Evaluation of NPS nutrient loading has been comprehensive and has included long-term monitoring, detailed watershed modeling, and synoptic sampling studies....
Simulation of the water-table altitude in the Biscayne Aquifer, southern Dade County, Florida, water years 1945-89
Michael L. Merritt
1997, Water Supply Paper 2458
The paper describes a regional model of flows in the Biscayne Aquifer of southern Dade County during five consecutive time periods during water years 1945 to 1989 that correspond to stages in the development of a system of levees and controlled canals for water management. Data describing surface-water and ground-water...
Geochemical analyses of ground-water ages, recharge rates, and hydraulic conductivity of the N aquifer, Black Mesa area, Arizona
Thomas J. Lopes, John P. Hoffmann
1997, Water-Resources Investigations Report 96-4190
The Navajo Nation and Hopi Tribe of the Black Mesa area, Arizona, depend on ground water from the N aquifer to meet most tribal and industrial needs. Increasing use of this aquifer is creating concerns about possible adverse effects of increased ground-water withdrawals on the water resources of the region....
The computer program FourPt (Version 95.01), a model for simulating one-dimensional, unsteady, open-channel flow
L. L. DeLong, D.B. Thompson, J. K. Lee
1997, Water-Resources Investigations Report 97-4016
Simulation of subsurface storage and recovery of effluent using multiple wells, St Petersburg, Florida
D. K. Yobbi
1997, Water-Resources Investigations Report 97-4024
The potential for subsurface storage and recovery, otherwise called aquifer storage and recovery, of effluent in the uppermost producing zone of the Upper Floridan aquifer in St. Petersburg, Florida, was studied by the U.S. Geological Survey, in cooperation with the city of St. Petersburg and the Southwest Florida Water Management...
Coastal-change and glaciological map of the Bakutis Coast, Antarctica
Charles Swithinbank, Richard S. Williams Jr., Jane G. Ferrigno, B. A. Seekins, B.K. Lucchita, Christine E. Rosanova
1997, IMAP 2600-F
Changes in the area and volume of the polar ice sheets are intricately linked to changes in global climate, and the resulting changes in sea level may severely impact the densely populated coastal regions on Earth. Loss of the West Antarctic part of the Antarctic ice sheet alone could...
The Loma Prieta, California, earthquake of October 17, 1989: Aftershocks and postseismic effects
Paul A. Reasenberg, Lynn D. Dietz, William L. Ellsworth, Robert W. Simpson, John W. Gephart, Susan Y. Schwartz, Glenn D. Nelson, H. Guo, A. Lerner-Lam, William Menke, Susan E. Hough, Leif Wennerberg, K.S. Breckenridge, Jeff Behr, Roger G. Bilham, Paul Bodin, Arthur G. Sylvester, Jon S. Galehouse, R. Burgmann, Paul Segall, Michael Lisowski, Jerry L. Svarc, John Langbein, Mark F. Linker, J.R. Rice, M. T. Gladwin, R. L. Gwyther, R.H.G. Hart, Randall Mackie, Theodore R. Madden, Edward A. Nichols
Paul A. Reasenberg, editor(s)
1997, Professional Paper 1550-D
While the damaging effects of the earthquake represent a significant social setback and economic loss, the geophysical effects have produced a wealth of data that have provided important insights into the structure and mechanics of the San Andreas Fault system. Generally, the period after a large earthquake is vitally important...
Modeling frequency-dependent GPR
M.H. Powers
1997, Leading Edge (Tulsa, OK) (16) 1657-1662
No abstract available. ...
Review of selected features of the natural system model, and suggestions for applications in South Florida
Jerad Bales, Janice M. Fulford, Eric D. Swain
1997, Water-Resources Investigations Report 97-4039
A study was conducted to review selected features of the Natural System Model, version 4.3 . The Natural System Model is a regional-scale model that uses recent climatic data and estimates of historic vegetation and topography to simulate pre-canal-drainage hydrologic response in south Florida. Equations used to represent the hydrologic...
Full Equations (FEQ) model for the solution of the full, dynamic equations of motion for one-dimensional unsteady flow in open channels and through control structures
Delbert D. Franz, Charles S. Melching
1997, Water-Resources Investigations Report 96-4240
The Full EQuations (FEQ) model is a computer program for solution of the full, dynamic equations of motion for one-dimensional unsteady flow in open channels and through control structures. A stream system that is simulated by application of FEQ is subdivided into stream reaches (branches), parts of the stream system...
Modeling waves and circulation in Lake Pontchartrain, Louisiana
Richard P. Signell, Jeffrey H. List
1997, Gulf Coast Association of Geological Societies Transactions (47) 529-532
The U.S. Geological Survey is conducting a study of storm-driven sediment resuspension and transport in Lake Pontchartrain, Louisiana. Two critical processes related to sediment transport in the lake are (1) the resuspension of sediments due to wind-generated storm waves and (2) the movement of resuspended material by lake currents during...
The paradox of nonmarine ichnofaunas in tidal rhythmites; integrating sedimentologic and ichnologic data from the Late Cretaceous of eastern Kansas, USA
Luis A. Buatois, M. Gabirela Mangano, Christopher G. Maples
1997, Palaios (12) 467-481
The occurrence of trace fossil assemblages dominated by arthropod trackways and surface grazing trails within Carboniferous tidal rhythmites has puzzled sedimentologists and ichnologists, who interpreted them either as marine or nonmarine. The Virgilian (Stephanian) Tonganoxie Sandstone Member (Stranger Formation) at Buildex Quarry (eastern Kansas) consists, for the most part, of...
Vulnerability of ground water to atrazine leaching in Kent County, Michigan
D. J. Holtschlag, C. L. Luukkonen
1997, Water-Resources Investigations Report 96-4198
A steady-state model of pesticide leaching through the unsaturated zone was used with readily available hydrologic, lithologic, and pesticide characteristics to estimate the vulnerability of the near-surface aquifer to atrazine contamination from non-point sources in Kent County, Michigan. The modelcomputed fraction of atrazine remaining at the water table, RM, was...
Stream-temperature characteristics in Georgia
T.R. Dyar, S. Jack Alhadeff
1997, Water-Resources Investigations Report 96-4203
Stream-temperature measurements for 198 periodic and 22 daily record stations were analyzed using a harmonic curve-fitting procedure. Statistics of data from 78 selected stations were used to compute a statewide stream-temperature harmonic equation, derived using latitude, drainage area, and altitude for natural streams having drainage areas greater than about 40...
Landscape characteristics of disturbed shrubsteppe habitats in southwestern Idaho (USA)
Steven T. Knick, J.T. Rotenberry
1997, Landscape Ecology (12) 287-297
We compared 5 zones in shrubsteppe habitats of southwestern Idaho to determine the effect of differing disturbance combinations on landscapes that once shared historically similar disturbance regimes. The primary consequence of agriculture, wildfires, and extensive fires ignited by the military during training activities was loss of native shrubs from the...
Computer simulation of vasectomy for wolf control
R.G. Haight, L. David Mech
1997, Journal of Wildlife Management (61) 1023-1031
Recovering gray wolf (Canis lupus) populations in the Lake Superior region of the United States are prompting state management agencies to consider strategies to control population growth. In addition to wolf removal, vasectomy has been proposed. To predict the population effects of different sterilization and removal strategies, we developed a...
Precipitation-runoff and streamflow-routing models for the Willamette River basin, Oregon
Antonius Laenen, John C. Risley
1997, Water-Resources Investigations Report 95-4284
Precipitation-runoff and streamflow-routing models were constructed and assessed as part of a water-quality study of the Willamette River Basin. The study was a cooperative effort between the U.S. Geological Survey (USGS) and the Oregon Department of Environmental Quality (ODEQ) and was coordinated with the USGS National Water-Quality Assessment (NAWQA) study...
Review of electric and magnetic fields accompanying seismic and volcanic activity
M.J.S. Johnston
1997, Surveys in Geophysics (18) 441-476
New observations of magnetic, electric and electromagnetic field variations, possibly related to recent volcanic and seismic events, have been obtained on Mt. Unzen in Japan, Reunion Island in Indian Ocean, the Long Valley volcanic caldera in California, and for faults in China and Russia, California and several other locations. For...
