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Page 3874, results 96826 - 96850

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Germination and establishment of the native plains cottonwood (Populus deltoides Marshall subsp. monilifera) and the exotic Russian-olive (Elaeagnus angustifolia L.)
Patrick B. Shafroth, Gregor T. Auble, Michael L. Scott
1995, Conservation Biology (9) 1169-1175
Russian-olive (Elaeagnus angustifolia) is a small Eurasian tree that has escaped from cultivation and become naturalized, primarily along watercourses throughout the western United States. We examined germination and establishment of Russian-olive and plains cottonwood (Populus deltoides), the principal native riparian tree of the Great Plains, under a range of experimental moisture and light conditions....
Pesticide movement in soils; a comparison of no-tillage and conventional tillage in the Beaver Creek watershed in West Tennessee
Lisa D. Olsen
1995, Open-File Report 95-329
In 1993, a study of pesticide movement and degradation in soils was intiated in the Beaver Creek watershed, which consists of about 95,000 acres and includes some of the Nation's most highly erodible soils. Resource-management agencies in this locality have recommended conservation tillage or "no-tillage" as a best management practices...
Hydrologic data of two wetlands at Spring City, Tennessee, December 1991 through November 1992
Gregory C. Johnson, Lawrence M. Brede
1995, Open-File Report 95-278
Hydrologic data for two small adjacent wetlands at Spring City, Tennessee, were collected from December 1991 through November 1992. One of the wetlands was natural and the other was constructed to replace a wetland disturbed by the construction of a road embankment. Water levels were monitored in five 7-inch-diameter wells,...
Water-quality assessment of the upper Snake River Basin, Idaho and western Wyoming — Environmental setting, 1980-92
Molly A. Maupin
1995, Water-Resources Investigations Report 94-4221
The 35,800-square-mile upper Snake River Basin is one of 20 areas studied as part of the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey. Objectives of NAWQA are to study ground- and surface-water quality, biology, and their relations to land-use activities. Major land and water uses that affect...
Geographic information system data sets of hydrogeologic conditions in Pequea and Mill Creek watersheds, Pennsylvania; Part II, Hydrogeologic interpretations
Dennis J. Low, Douglas C. Chichester, Stephen J. Char
1995, Open-File Report 95-193
This report describes Geographic Information System data sets of ground-water levels, unsaturated-zone thickness, and regolith thickness in the Pequea and Mill Creek watersheds, a 210-square-mile area in Lancaster and Chester Counties, Pa. The data sets, which represent hydrogeologic interpretations, were developed by the use of ARC/INFO software during 1990-93 by...
Subsurface recharge to the Tesuque aquifer system from selected drainage basins along the western side of the Sangre de Cristo Mountains near Santa Fe, New Mexico
Maryann Wasiolek
1995, Water-Resources Investigations Report 94-4072
Water budgets developed for basins of five streams draining the western side of the Sangre de Cristo Mountains in northern New Mexico indicate that subsurface inflow along the mountain front is recharging the Tesuque aquifer system of the Espanola Basin. Approximately 14,700 acre-feet of water per year, or 12.7 percent...
Analysis of steady-state flow and advective transport in the eastern Snake River Plain aquifer system, Idaho
D. J. Ackerman
1995, Water-Resources Investigations Report 94-4257
Quantitative estimates of ground-water flow directions and traveltimes for advective flow were developed for the regional aquifer system of the eastern Snake River Plain, Idaho. The work included: (1) descriptions of compartments in the aquifer that function as intermediate and regional flow systems, (2) descriptions of pathlines for flow originating...