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Water quality of the tidal Potomac River and estuary hydrologic data report, 1980 water year
Stephen Blanchard, R.H. Coupe Jr., J.C. Woodward
1982, Open-File Report 82-152
This report contains data on the physical and chemical properties measured in the Tidal Potomac River and Estuary during the 1980 Water Year. Data were collected routinely at five stations, and periodically at 17 stations including three stations near the mouth of the Potomac River in Chesapeake Bay. Each of...
Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska
D.C. Blanchard, I.L. Tailleur
1982, Open-File Report 82-391
Temperature and related records from 28 wells in the National Petroleum Reserve in Alaska (NPRA) although somewhat constrained from accuracy by data gathering methods, extrapolate to undisturbed formation temperatures at specific depths below permafrost, and lead to calculated geothermal gradients between these depths. Tabulation of the results show that extrapolated...
Digital colored residual and regional Bouguer gravity maps of the conterminous United States: Comments on significant features
T.G. Hildenbrand, R.W. Simpson, R. H. Godson, M. F. Kane
1982, Open-File Report 82-284
The gravity maps were prepared from data obtained primarily from data files maintained by the Defense Mapping Agency of the Department of Defense and the Canadian Gravity Data Centre of the Earth Physics Branch of the Department of Energy, Mines, and Resources (Canada). The maps have been used in studies...
Depth and temperature of permafrost on the Alaskan Arctic Slope; preliminary results
Arthur H. Lachenbruch, J.H. Sass, L.A. Lawver, M.C. Brewer, T.H. Moses
1982, Open-File Report 82-1039
As permafrost is defined by its temperature, the only way to determine its depth is to monitor the return to equilibrium of temperatures in boreholes that penetrate permafrost. Such measurements are under way in 25 wells on the Alaskan Arctic Slope; 21 are in Naval Petroleum Reserve Alaska (NPRA), and...
Depositional history of Louisiana-Mississippi outer continental shelf
J. L. Kindinger, R. J. Miller, C. E. Stelting
1982, Open-File Report 82-1077
A geological study was undertaken in 1981 in the Louisiana-Mississippi outer continental shelf for the Bureau of Land Management. The study included a high-resolution seismic reflection survey, surficial sediment sampling and surface current drifter sampling. Approximately 7100 sq km of the Louisiana-Mississippi shelf and upper slope were surveyed. The sea...
SEISRISK II; a computer program for seismic hazard estimation
Bernice Bender, D. M. Perkins
1982, Open-File Report 82-293
The computer program SEISRISK II calculates probabilistic ground motion values for use in seismic hazard mapping. SEISRISK II employs a model that allows earthquakes to occur as points within source zones and as finite-length ruptures along faults. It assumes that earthquake occurrences have a Poisson distribution, that occurrence rates remain...
Annual summary of ground-water conditions in Arizona, Spring 1981 to Spring 1982
Water Resources Division, U.S. Geological Survey
1982, Open-File Report 82-1009
The withdrawal of ground water was about 5.4 million acre-feet in Arizona in 1981, which is about 800,000 acre-feet more than the amount withdrawn in 1980. Most of the increase in 1981 was in the amount of ground water used for irrigation in the Basin and Range lowlands province. Through...
Arizona Vegetation Resource Inventory (AVRI) accuracy assessment
John Szajgin, L. R. Pettinger, D.S. Linden, D.O. Ohlen
1982, Open-File Report 82-814
A quantitative accuracy assessment was performed for the vegetation classification map produced as part of the Arizona Vegetation Resource Inventory (AVRI) project. This project was a cooperative effort between the Bureau of Land Management (BLM) and the Earth Resources Observation Systems (EROS) Data Center. The objective of the accuracy assessment...