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Characterization of aquifers designated as potential drinking-water sources in Mississippi
L. A. Gandl
1982, Open-File Report 81-550
The Environmental Protection Agency has established that all ground water having a dissolved-solids concentration of less than 10,000 milligrams per liter is to be protected from injection of waste material. The Underground Injection Control program is intended to protect aquifers that are possible future sources of drinking water. Fourteen aquifers...
Water quality of the Barataria Unit; Jean Lafitte National Historical Park, Louisiana
Charles R. Garrison
1982, Open-File Report 82-691
Surface-water samples were collected on a monthly basis for the period April 1981-March 1982 from six sites within the Barataria Marsh Unit of the Jean Lafitte National Historic Park, Louisiana. The sites were located on Bayou Segnette, Kenta Canal , and Millaudon Canal. Biological, chemical, and physical analyses were performed....
Projected effects of proposed salinity-control projects on shallow ground water; preliminary results for the upper Brazos River basin, Texas
Sergio Garza
1982, Open-File Report 82-908
As part of the plan to control the natural salt pollution in the upper Brazos River basin of Texas, the U.S. Army Corps of Engineers recommended construction of three impoundment and retention reservoirs. In connection with the proposed reservoirs, the U.S. Geological Survey was requested to define the existing ground-water...
Specific conductance and dissolved chloride concentrations of freshwater aquifers and streams in petroleum producing areas in Mississippi
S. J. Kalkhoff
1982, Open-File Report 82-353
Specific conductance and dissolved chloride reconnasissance sampling was conducted in six oil-producing areas of Mississippi during periods of low streamflow in 1980 and 1981. Water samples were collected at 224 ground-water and 190 suface-water sites. Samples from 55 surface-water and 17 ground-water sites contained dissolved chloride concentrations in excess of...
Quality of water in Luxapallia Creek at Columbus, Mississippi
Stephen J. Kalkhoff
1982, Open-File Report 82-373
A quality-of-water study was conducted on September 9-12, 1979, on Luxapallila Creek and its tributaries, Magby and McCrary Creeks. The short term study indicated that the water in Luxapallila, Magby, and McCrary Creeks is suitable for many purposes.The dissolved-oxygen concentration, temperature, and pH of the water in Luxapallila Creek changed...
Prediction of earthquake response spectra
W. B. Joyner, David M. Boore
1982, Open-File Report 82-977
We have developed empirical equations for predicting earthquake response spectra in terms of magnitude, distance, and site conditions, using a two-stage regression method similar to the one we used previously for peak horizontal acceleration and velocity. We analyzed horizontal pseudo-velocity response at 5 percent damping for 64 records of 12...
Estimation of response-spectral values as functions of magnitude, distance, and site conditions
W. B. Joyner, David M. Boore
1982, Open-File Report 82-881
We have developed empirical predictive equations for the horizontal pseudo-velocity response at 5-percent damping for 12 different periods from 0.1 to 4.0 s. Using a multiple linear-regression method similar to the one we used previously for peak horizontal acceleration and velocity, we analyzed response spectra period by period for 64...
Directory of assistance centers of the National Water Data Exchange (NAWDEX)
Beverly M. Josefson, Cassandra D. Blackwell
1982, Open-File Report 82-925
The National Water Data Exchange (NAWDEX), managed by the U.S. Geological Survey, has established a network of Assistance Centers throughout the United States and Puerto Rico to assist users of water data in identifying and locating the data they need. This Directory provides the information needed to contact any of...
Flood of October 8, 1977 in St. Croix, U.S. Virgin Islands
Karl G. Johnson, Ramon A. Carrasquillo, Ralph Gonzalez
1982, Open-File Report 82-262
Severe flooding throughout St. Croix, United States Virgin Islands occurred on October 8, 1977. A tropical storm moving across the island produced as much as 16 inches of precipitation. The most affected areas were near Frederiksted, Mon Bijou, and the Airport. The peak discharge of River Gut near the Airport...