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Page 1561, results 39001 - 39025

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Approximate water-level changes in wells in the Chichot and Evangeline aquifers, 1977-85 and 1984-85, and measured compaction, 1973-85, in the Houston-Galveston region, Texas
James Frank Williams III, C.E. Ranzau Jr.
1985, Open-File Report 85-158
This report, which was prepared in cooperation with the City of Houston and the Galveston Coastal Subsidence District, present data on water-level changes during 1977-85 and 1984-85 in the Chicot and Evangeline aquifers (figs. 1-4) and data on measured compaction 1973-85 (fig. 5). Water levels in about 500 wells were used...
Data on the distribution and abundance of submersed aquatic vegetation in the tidal Potomac River and transition zone of the Potomac Estuary, Maryland, Virginia, and the District of Columbia, 1983-1984
Virginia Carter, N. B. Rybicki, R. T. Anderson, T. J. Trombley, G.L. Zynjuk
1985, Open-File Report 85-82
Data on the distribution and abundance of submerged aquatic vegetation were collected in the tidal Potomac River and transition zone of the Potomac Estuary during 1983 and 1984. Plant species were identifed on transects. Water-quality characteristics measured include temperature, specific conductance, and Secchi depth. Maps were made of the distribution...
Geology and geochronology of granitoid and metamorphic rocks of late Archean age in northwestern Wisconsin
P.K. Sims, Z. E. Peterman, R. E. Zartman, F. C. Benedict
1985, Professional Paper 1292-C
Granitoid rocks of the Puritan Quartz Monzonite and associated biotite gneiss and amphibolite in northwestern Wisconsin compose the southwestern part of the Puritan batholith of Late Archean age. They differ from rocks in the Michigan segment of the batholith in having been deformed by brittle-ductile deformation and partly recrystallized during...
Sediment sources and transport in Kings Bay and vicinity, Georgia and Florida, July 8-16, 1982
D. B. Radtke
1985, Professional Paper 1347
Water quality, bottom-material, suspended-sediment, and current velocity data were collected during July 1982 in Kings Bay and vicinity to provide information on the source and transport of estuarine sediments. Kings Bay and Cumberland Sound, the site of the Poseidon Submarine Base in southeast Georgia, are experiencing high rates of sediment...
Geochemistry of ground-water in two sandstone aquifer systems in the Northern Great Plains in parts of Montana and Wyoming, North Dakota, and South Dakota
Thomas Henderson
1985, Professional Paper 1402-C
The Kootenai Formation in the Judith Basin, Montana, and the Lance Formation and Fox Hills Sandstone in the Powder River Basin, Wyoming, constitute two important sandstone aquifer systems in the Northern Great Plains region. Ground waters in each of these systems evolve from low dissolved-solids concentration, near-neutral pH, predominantly calcium...
Computer-assisted map projection research
John Parr Snyder
1985, Bulletin 1629
Computers have opened up areas of map projection research which were previously too complicated to utilize, for example, using a least-squares fit to a very large number of points. One application has been in the efficient transfer of data between maps on different projections. While the transfer of moderate amounts...
An approach for appraising the accuracy of suspended-sediment data
D. E. Burkham
1985, Professional Paper 1333
Procedures are presented for appraising the accuracy of suspended-sediment data. Types of errors involved are sampling error, spatial error, temporal error, and sediment-discharge error. The standard error of estimate is used to represent errors. Suspended-sediment data for 17 U.S. Geological Survey gaging stations in Arizona, California, Nebraska, New Mexico, Pennsylvania,...
Water Resources Division in the 1980's : a summary of activities and programs of the U.S. Geological Survey's Water Resources Division
Edith B. Chase, John E. Moore, David A. Rickert
1985, Circular 893
The Water Resources Division of the U.S. Geological Survey has the principal responsibility within the Federal government for providing hydrologic information and appraising the Nation's water resounds. The Geological Survey is unique among government organizations because it has neither regulatory nor developmental authority--its sole product is information that is made...
Traveltime and dispersion in the Potomac River, Cumberland, Maryland, to Washington, D.C.
Kenneth R. Taylor, Robert W. James Jr., Bernard M. Helinsky
1985, Water Supply Paper 2257
A travel-time and dispersion study using rhodamine dye was conducted on the Potomac River between Cumberland, Maryland, and Washington, D.C., a distance of 189 miles. The flow during the study was at approximately the 90-percent flow-duration level. A similar study was conducted by Wilson and Forrest in 1964 at a...
Data processing programs for aerial gamma-ray data
Joseph S. Duval1
1985, Open-File Report 85-359
The U.S. Geological Survey (USGS) uses computer programs to process aerial gamma-ray data; some do editing and data manipulation to allow for corrections. Programs to convert flight-line data to latitude-longitude coordinates are included. Plotting programs include contour plotting, profile plots, and photographic raster plots....