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Surface-water-quality assessment of the Yakima River basin in Washington: major-and minor-element data for sediment, water, and aquatic biota, 1987-91
Gregory J. Fuhrer, Shelley L. Fluter, Stuart W. McKenzie, Joseph F. Rinella, J. Kent Crawford, Daniel J. Cain, Michelle I. Hornberger, Jennifer L. Bridges, Kenneth A. Skach
1994, Open-File Report 94-308
Major- and minor-element concentrations are presented for streambed and suspended sediment, filtered- and unfiltered-water, and aquatic-biota samples collected during 1987-91 from the Yakima River Basin in south-central Washington. The samples were collected as part of the U.S. Geological Survey's National Water-quality Assessment (NAWQA) program which is designed to provide results...
Slope and aspect classifications of Lake Tahoe Basin, California and Nevada
L. A. Peltz, K. D. Cartier, J. LaRue Smith
1994, Open-File Report 94-105
A geographic information system was used to develop maps of slope and aspect data for the Lake Tahoe basin of California and Nevada. The maps were pro- duced at 1:100,000 scale by using digital-elevation data derived from 1:24,000-scale maps. The maps show slope (steepness) and aspect (compass-direction) data for the...
Potentiometric surface of the Brightseat-upper Potomac Aquifer in Virginia, 1993
E. C. Hammond, E. R. McFarland, M. J. Focazio
1994, Open-File Report 94-370
Ground-water level measurements from 30 wells in the Brightseat-upper Potomac aquifer in the Coastal Plain Physiographic Province of Virginia in 1993 were used to prepare a map of the potentiometric surface of the aquifer. The map shows the potentiometric surface of the Brightseat-upper Potomac aquifer indicating a regional trend toward...
Potentiometric surface of the middle Potomac Aquifer in Virginia, 1993
E. C. Hammond, E. R. McFarland, M. J. Focazio
1994, Open-File Report 94-372
Ground-water level measurements from 50 wells in the middle Potomac aquifer in the Coastal Plain Physiographic Province of Virginia in 1993 were used to prepare a map of the potentiometric surface of the aquifer. The map shows the potentiometric surface of the middle Potomac aquifer sharply declining eastward from nearly...
Potentiometric surface of the lower Potomac Aquifer in Virginia, 1993
E. C. Hammond, E. R. McFarland, M. J. Focazio
1994, Open-File Report 94-373
Ground-water level measurements from 17 wells in the lower Potomac aquifer in the Coastal Plain Physiographic Province of Virginia in 1993 were used to prepare a map of the potentiometric surface of the aquifer. The map shows the potentiometric surface of the lower Potomac aquifer indicating a regional trend toward...