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Page 3356, results 83876 - 83900

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Not all publications have extents, not all extents are completely accurate
Digital geologic map database of the Payette National Forest and vicinity, Idaho
Karen Lund, P. D. Derkey, T. R. Brandt, J.R. Oblad
1999, Open-File Report 98-219-B
The geology of the Payette National Forest and vicinity, Idaho (Fig. 1), was mapped and compiled by Karen Lund between 1992 and 1996. The geologic data for the digital map are from original mapping as well as compilation by Lund of numerous sources of published and unpublished geologic maps that...
Salinity as a constraint on growth of oligohaline marsh macrophytes. I. Species variation in stress tolerance
R.J. Howard, I.A. Mendelssohn
1999, American Journal of Botany (86) 785-794
The effects of increased salinity on plant growth were examined in a greenhouse experiment with four species common to oligohaline marshes of the northern Gulf of Mexico: Eleocharis palustris, Panicum hemitomon, Sagittaria lancifolia, and Scirpus americanus. Effects of final salinity reached (6 or 12 g/L), salinity influx rate (3 d...
Desert winds: Monitoring wind-related surface processes in Arizona, New Mexico, and California
Carol S. Breed, Marith C. Reheis, editor(s)
1999, Professional Paper 1598
The 18-year Desert Winds Project established instrumented field sites in the five major regions of the North American Desert to obtain meteorological, geological, and vegetation data for natural desert sites affected by wind erosion. The eight chapters in this volume describe the settings and operation of the stations and summarize...
Examining risk in mineral exploration
Donald A. Singer, Ryoichi Kouda
1999, Natural Resources Research (8) 111-122
Successful mineral exploration strategy requires identification of some of the risk sources and considering them in the decision-making process so that controllable risk can be reduced. Risk is defined as chance of failure or loss. Exploration is an economic activity involving risk and uncertainty, so risk also must be defined...
Documentation for HYDMOD; a program for extracting and processing time-series data from the U.S. Geological Survey's modular three-dimensional finite-difference ground-water flow model
Randall T. Hanson, Stanley A. Leake
1999, Open-File Report 98-564
This report presents a FORTRAN computer program that generates simulated time-series data as output from the U.S. Geological Survey Modular Finite-Difference Ground-Water Flow Model at user-specified point locations or a collection of points that compose a profile through the modeled region. The program can save time-series data at user-specified locations...
Surface-water-quality assessment of the Yakima River basin, Washington. Distribution of pesticides and other organic compounds in water, sediment, and aquatic biota, 1987-91: With a section on dissolved organic carbon in the Yakima River basin
Joseph F. Rinella, Stuart W. McKenzie, J. Kent Crawford, William T. Foreman, Gregory J. Fuhrer, Jennifer L. Morace, George R. Aiken
1999, Water Supply Paper 2354-B
During 1987-91, chemical data were collected for pesticides and other organic compounds in surface water, streambed sediment, suspended sediment, agricultural soil, and aquatic biota to determine the occurrence, distribution, transport, and fate of organic compounds in the Yakima River basin in Washington. The report describes the chemical and physical properties...
Salinity as a constraint on growth of oligohaline marsh macrophytes. II. Salt pulses and recovery potential
R.J. Howard, I.A. Mendelssohn
1999, American Journal of Botany (86) 795-806
The ability of common oligohaline marsh macrophytes of the northern Gulf of Mexico coast to recover from pulses of increased salinity was investigated in a greenhouse experiment with Eleocharis palustris, Panicum hemitomon, Sagittaria lancifolia, and Scirpus americanus monocultures. Components of salinity pulses applied were final salinity reached (6 or 12...
An interpretation of the 1997 airborne electromagnetic (AEM) survey, Fort Huachuca vicinity, Cochise County, Arizona
Mark W. Bultman, Mark E. Gettings, Jeff Wynn
1999, Open-File Report 99-7-B
In March of 1997, an airborne electromagnetic (AEM) survey of the Fort Huachuca Military Reservation and immediate surrounds was conducted. This survey was sponsored by the U.S. Army and contracted through the Geologic Division of the U.S. Geological Survey (USGS). Data were gathered by Geoterrex-Dighem Ltd. of Ottawa, Canada. The...
The quality of our nation's waters: Nutrients and pesticides
Water Resources Division, U.S. Geological Survey
1999, Circular 1225
This report is the first in a series of nontechnical publications, 'The quality of our nation's waters,' designed to describe major findings of the National Water-Quality Assessment Program regarding water-quality issues of regional and national concern. Sources, seasonal and geographic patterns of occurrence, and long-term trends are evaluated for nutrients...
Geologic map of the Middletown quadrangle, Frederick, Shenandoah, and Warren Counties, Virginia
Randall C. Orndorff, Jack Burton Epstein, Robert C. McDowell
1999, Geologic Quadrangle 1803
The Middletown 1:24,000-scale quadrangle is one of several quadrangles in Frederick County, Virginia mapped or being mapped by geologists from the U.S. Geological Survey in Reston, VA with funding from the National Cooperative Geologic Mapping Program. This map was originally published as a paper product in 1999. It has been...