Earthquakes and the southeastern boundary of the intact Iapetan margin in eastern North America
R. L. Wheeler
1996, Seismological Research Letters (67) 77-83
Earthquakes at three localities in eastern North America have been attributed on geological and seismological grounds to compressional reactivation of some of the late Proterozoic or early Paleozoic normal faults in the northeast-trending Iapetan passive margin. Assessment of seismic hazard can be aided by identifying the boundaries of the area...
Bouguer and isostatic residual gravity anomaly and derivative maps of the Lawton area, southwestern Oklahoma
Meridee Jones-Cecil, S. L. Robbins
1996, Geophysical Investigations Map 998-B
Trends in chloride, dissolved-solids, and nitrate concentrations in ground water, Carson Valley and Topaz Lake Areas, Douglas County, Nevada, 1959-88
C. E. Thodal
1996, Water-Resources Investigations Report 95-4254
Rapid population growth in Douglas County, an area of approximately 750 square miles in west-central Nevada, has led to concern about the present and future effects of development on ground water. This report describes the results of two nonparametric statistical procedures applied to detect trends in concentrations of chloride, dissolved...
Ground-water and surface-water relations along the Mojave River, southern California
Gregory C. Lines
1996, Water-Resources Investigations Report 95-4189
The Mojave River and the associated floodplain aquifer are important water supplies in the Mojave Desert of Southern California. The river and aquifer, in many areas, are in excellent hydraulic connection, and when flow conditions change in one, the other almost always is affected.To better understand these relations, records of...
Hydrogeology and simulation of ground-water flow at the South Well Field, Columbus, Ohio
W. L. Cunningham, E. Scott Bair, W.P. Yost
1996, Water-Resources Investigations Report 95-4279
The City of Columbus, Ohio, operates four radial collector wells in southern Franklin County. The 'South Well Field' is completed in permeable outwash and ice-contact deposits, upon which flow the Scioto River and Big Walnut Creek. The wells are designed to yield approximately 42 million gallons per day; part of...
Hydrogeology and simulation of ground-water flow in the alluvial aquifer at Louisville, Kentucky
M. A. Lyverse, J.J. Starn, M.D. Unthank
1996, Water-Resources Investigations Report 91-4035
The alluvial aquifer at Louisville, Ky., lies in a valley eroded by glacial meltwater that was later partly filled with outwash sand and gravel deposits. The aquifer is primarily unconfined, and the direction of flow is from the adjacent limestone and shale valley wall toward the Ohio River and major...
Sediment transport and deposition in Lakes Marion and Moultrie, South Carolina, 1942-85
G. G. Patterson, T.W. Cooney, R.M. Harvey
1996, Water-Resources Investigations Report 95-4236
Lakes Marion and Moultrie, two large reservoirs in the South Carolina Coastal Plain, receive large inflows of sediment from the Santee River. The average rate of sediment deposition for both lakes during the period 1942-85 was about 0.06 inch per year, or about 800 acre-feet per year. The rate during...
Stratigraphic framework of the Alaska Peninsula
Robert L. Detterman, J. E. Case, J. W. Miller, Frederic H. Wilson, M. E. Yount
1996, Bulletin 1969-A
No abstract available....
Sources and loads of nutrients in the South Platte River, Colorado and Nebraska, 1994-95
D. W. Litke
1996, Water-Resources Investigations Report 96-4029
The South Platte River Basin was one of 20 river basins selected in 1991 for investigation as part of the U.S. Geological Survey's National Water- Quality Assessment (NAWQA) Program. Nationwide, nutrients have been identified as one of the primary nationwide water-quality concerns and are of particular interest in the...
Flood-plain and channel aggradation at selected bridge sites in the Iowa and Skunk River basins, Iowa
D. A. Eash
1996, Water-Resources Investigations Report 95-4290
Flood-plain and channel-aggradation rates were estimated at 10 bridge sites on the Iowa River upstream of Coralville Lake and at two bridge sites in the central part of the Skunk River Basin. Four measurement methods were used to quantify aggradation rates: (1) a dendrogeomorphic method that used tree-age data and...
Geology and ground-water resources of the Blackfeet Indian Reservation, northwestern Montana
M. R. Cannon
1996, Hydrologic Atlas 737
Ground-water resources of the Blackfeet Indian Reservation are facing increased development for domestic and public drinking-water supplies and for industrial use. Along with the increased demand for ground-water data to address water-rights issues, water-quality concerns, and water-management decisions. The increased demand for ground water and ground-water data highlighted the need...
Status of ground-water resources at U.S. Navy Support Facility, Diego Garcia; summary of hydrologic and climatic data, January 1993 through December 1995
J.D. Torikai
1996, Open-File Report 96-183
This report contains hydrologic and climatic data that describe the status of ground-water resources at U.S. Navy Support Facility, Diego Garcia. Data presented are from January 1993 through December 1995, although the report focuses on hydrologic events from October through December 1995 (fourth quarter of 1995). Cumulative rainfall for October...
Red slime, black coats, and oily films; the iron and manganese cycles at Huntley Meadows Wetland, Fairfax County, Virginia; field trip guidebook for Geological Society of Washington
E. I. Robbins
1996, Open-File Report 96-81
Effects of low-flow diversions from the South Wichita River on downstream salinity of the South Wichita River, Lake Kemp, and the Wichita River, North Texas, October 1982-September 1992
Stanley Baldys, Peter W. Bush, Charles C. Kidwell
1996, Water-Resources Investigations Report 95-4288
In parts of the upper reaches of the Red River Basin in Texas, streamflow is characterized by levels of salinity that limit its usefulness for most purposes. Large dissolved solids and dissolved chloride concentrations are caused primarily by flow from natural salt springs in tributaries to the Red River. To...
Real-Time Mapping alert system; user's manual
L.A. Torres
1996, Open-File Report 95-762
The U.S. Geological Survey has an extensive hydrologic network that records and transmits precipitation, stage, discharge, and other water- related data on a real-time basis to an automated data processing system. Data values are recorded on electronic data collection platforms at field monitoring sites. These values are transmitted by means...
Magnitude and frequency of floods in Alabama
J. Brian Atkins
1996, Water-Resources Investigations Report 95-4199
Methods of estimating flood magnitudes for recurrence intervals of 2, 5, 10, 25, 50,100, 200, and 500 years are described for rural streams in Alabama that are not affected by regulation or urbanization. Flood-frequency characteristics are presented for 198 gaging stations in Alabama having 10 or more years of record...
Feasibility of using acoustic velocity meters for estimating highly organic suspended-solids concentrations in streams
Eduardo Patino
1996, Open-File Report 96-137
A field experiment was conducted at the Levee 4 canal site below control structure G-88 in the Everglades agricultural area in northwestern Broward County, Florida, to study the relation of acoustic attenuation to suspended-solids concentrations. Acoustic velocity meter and temperature data were obtained with concurrent water samples analyzed for suspended-solids...
Remote sensing of mangrove wetlands: Relating canopy spectra to site-specific data
Elijah Ramsey III, John R. Jensen
1996, Photogrammetric Engineering and Remote Sensing (62) 939-948
No abstract available....
Preliminary estimates of ground-motion amplification for the Northridge and Hyogo-ken Earthquakes of January 17, 1994 and 1995
Roger D. Borcherdt
1996, Conference Paper, Wind and seismic effects: Proceedings of the 28th joint meeting of the U.S.-Japan Cooperative Program in Natural Resources
No abstract available....
Postseismic rebound in fault step-overs caused by pore fluid flow
G. Peltzer, P. Rosen, F. Rogez, Kenneth W. Hudnut
1996, Science (273) 1202-1204
Near-field strain induced by large crustal earthquakes results in changes in pore fluid pressure that dissipate with time and produce surface deformation. Synthetic aperture radar (SAR) interferometry revealed several centimeters of postseismic uplift in pull-apart structures and subsidence in a compressive jog along the Landers, California, 1992 earthquake surface rupture,...
A high-performance liquid chromatography-based screening method for the analysis of atrazine, alachlor, and ten of their transformation products
B.R. Schroyer, P. D. Capel
1996, Conference Paper, Herbicide Metabolites in Surface Water and Groundwater
No abstract available....
Volatile organic compounds in surface water and ground water in parts of the Upper Mississippi River Basin, 1998-94
J. R. Stark, W. J. Andrews, J. D. Fallon, S. E. Kroening
1996, Conference Paper, Hydrology and hydrogeology of urban and urbanizing areas
No abstract available....
Annual report of the USGS Mission, Kingdom of Saudi Arabia, for the fiscal year 1995
U.S. Geological Survey Saudi Arabia Mission, Saudi Arabia. Wizārat al-Batrūl wa-al-Tharwah al-Maʻdinīyah
1996, Technical Report USGS-TR-96-1
An interagency report prepared by the U.S. Geological Survey Saudi Arabian Mission for the Ministry of Petroleum and Mineral Resources, Kingdom of Saudi Arabia. ...
Subsidence of agricultural lands in the Sacramento‐San Joaquin Delta, California: Role of aqueous and gaseous carbon fluxes
Steven J. Deverel, Stuart Rojstaczer
1996, Water Resources Research (32) 2359-2367
To examine the causes of land subsidence on marshes drained for agriculture, carbon fluxes and changes in land‐surface elevation were determined on three islands in the Sacramento‐San Joaquin Delta, California. Over the time period of March 1990 to May 1992, gaseous CO2 fluxes were determined approximately monthly using closed chambers, and...
Effects of nutrients and hydroperiod on Typha, Cladium, and Eleocharis: Implications for everglades restoration
S. Newman, James B. Grace, J. W. Koebel
1996, Ecological Applications (6) 774-783
The recent expansion of Typha domingensis (Typha) into areas of the Everglades previously dominated by Cladium jamaicense (Cladium) communities has led to competing hypotheses about the importance of nutrient concentration vs. hydroperiod in controlling the distribution of these species. In this study, experimental mixtures of Typha domingensis, Cladium jamaicense, and...
