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Page 3743, results 93551 - 93575

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Time-dependent Data System (TDDS); an interactive program to assemble, manage, and appraise input data and numerical output of flow/transport simulation models
R.S. Regan, R.W. Schaffranek, R.A. Baltzer
1996, Water-Resources Investigations Report 96-4143
A system of functional utilities and computer routines, collectively identified as the Time-Dependent Data System CI DDS), has been developed and documented by the U.S. Geological Survey. The TDDS is designed for processing time sequences of discrete, fixed-interval, time-varying geophysical data--in particular, hydrologic data. Such data include various, dependent variables...
Eutrophication trends inferred from hypolimnetic dissolved-oxygen dynamics within selected White River reservoirs, northern Arkansas-southern Missouri, 1974-94
W. R. Green
1996, Water-Resources Investigations Report 96-4096
The White River Basin in northern Arkansas and southern Missouri contains four major reservoirs. Beaver, Table Rock, and Bull Shoals Lakes form a chain of reservoirs on the main stem of the White River. Norfork Lake is on the North Fork River, a tributary of the White River. Vertical water-...
Physical and chemical characteristics of Terrace Reservoir, Conejos County, Colorado, May 1994 through May 1995; interim report
Stogner, Patrick Edelmann, Katherine Walton-Day
1996, Water-Resources Investigations Report 96-4150
Terrace Reservoir receives drainage of low-pH, metal-enriched water from mineralized areas, including the Summitville Mine, within the Alamosa River Basin. Drainage from the Summitville Mine has contributed a substantial part of the metal load to Terrace Reservoir. From May 1994 through May 1995, a study was done by the U.S....
Hydrologic feasibility of water-supply-development alternatives in Cape May County, New Jersey
F. J. Spitz
1996, Water-Resources Investigations Report 96-4041
Increasing public-supply withdrawals in Cape May County, New Jersey associated with increasing residential and seasonal tourist populations have led to regionally lowered ground-water levels, a reversal of ground-water flow directions toward onshore, and landward encroachment of saltwater in the shallow aquifer system. The three aquifers composing the shallow system are,...
Streambed-material characteristics and surface-water quality, Green Pond Brook and tributaries, Picatinny Arsenal, New Jersey, 1983-90
Donald A. Storck, Pierre J. Lacombe
1996, Water-Resources Investigations Report 95-4246
This report presents the results of a study conducted at Picatinny Arsenal, Morris County, New Jersey, to (1) determine whether streambed sediments in Green Pond Brook and its tributaries are contaminated with inorganic or organic constituents, (2) determine the extent of contamination in those reaches, and (3) characterize the quality...
Potential role of vegetation feedback in the climate sensitivity of high-latitude regions: A case study at 6000 years B.P.
J.-E. Kutzbach, P. J. Bartlein, J.A. Foley, S. P. Harrison, Steven W.. Hostetler, Z. Liu, I. C. Prentice, T. Webb III
1996, Global Biogeochemical Cycles (10) 727-736
Previous climate model simulations have shown that the configuration of the Earth's orbit during the early to mid-Holocene (approximately 10–5 kyr) can account for the generally warmer-than-present conditions experienced by the high latitudes of the northern hemisphere. New simulations for 6 kyr with two atmospheric/mixed-layer ocean models (Community Climate Model,...
Use of archaeology to date liquefaction features and seismic events in the New Madrid seismic zone, Central United States
Martitia P. Tuttle, Robert H. Lafferty III, Margaret J. Guccione, Eugene S. Schweig III, N. Lopinot, Robert F. Cande, Kathleen Dyer-Williams, Marion Haynes
1996, Geoarchaeology - An International Journal (11) 451-480
Prehistoric earthquake-induced liquefaction features occur in association with Native American occupation horizons in the New Madrid seismic zone. Age control of these liquefaction features, including sand-blow deposits, sand-blow craters, and sand dikes, can be accomplished by extensive sampling and flotation processing of datable materials as well as archaeobotanical analysis of...
Status of ground-water resources at U.S. Navy Support Facility, Diego Garcia; summary of hydrologic and climatic data, January 1994 through March 1996
J.D. Torikai
1996, Open-File Report 96-349
This report describes the status of ground-water resources at U.S. Navy Support Facility, Diego Garcia. Data presented are from January 1994 through March 1996, with a focus on data from January through March 1996 (first quarter of 1996). A complete database of ground-water withdrawals and chloride-concentration records since 1985 is...
Determination of hydraulic characteristics and yield of aquifers underlying Vekol Valley, Arizona, using several classical and current methods
James R. Marie, Kenneth J. Hollett
1996, Water Supply Paper 2453
Investigations were conducted in Arizona during the early 1980's to obtain hydrologic data in order to deliver 30,000 acre-feet of water annually to the Ak-Chin Indian Reservation. A recharge experiment produced infiltration rates for an ephemeral stream channel that ranged from 0.64 to 1.09 cubic feet per second per 1,000...
Evaluation of Acoustic Doppler Current Profiler measurements of river discharge
S. E. Morlock
1996, Water-Resources Investigations Report 95-4218
Developments in Acoustic Doppler Current Profiler (ADCP) technologies have made these instruments potentially useful for making measurements of discharge in rivers and large streams. Although there have been several laboratory studies and some field experiments, quantitative information on the performance of ADCP's under field conditions is relatively rare but essential...
Evaluation of saltwater intrusion and travel time in the Atlantic City 800-foot sand, Cape May County, New Jersey, 1992, by use of a coupled-model approach and flow-path analysis
L. M. Voronin, F. J. Spitz, S. D. McAuley
1996, Water-Resources Investigations Report 95-4280
Regional and subregional ground-water-flow models were coupled, and the output was analyzed by a particle-tracking method. The results were then used to assess the effects of ground-water withdrawals on the flow of saltwater in the Atlantic City 800-foot sand in Cape May County, New Jersey, and to estimate the travel...
Analysis of selected water-quality data for surface water in St. Tammany Parish, Louisiana, April-August 1995
Dennis K. Demcheck
1996, Open-File Report 96-345
Physical and chemical-related properties, concentrations of chemical constituents, which included major ions and nutrients, and concentrations of fecal-coliform bacteria were determined for 17 sites on 11 streams in St. Tammany Parish, Louisiana, during the period April-August 1995. The streams were sampled to assess the effects of different streamflow conditions...
Scour at bridge sites in Delaware, Maryland, and Virginia
Donald C. Hayes
1996, Water-Resources Investigations Report 96-4089
Scour data were obtained from discharge measure- ments to develop and evaluate the reliability of constriction-scour and local-scour equations for rivers in Delaware, Maryland, and Virginia. No independent constriction-scour or local-scour equations were developed from the data because no significant relation was deter-mined between measured scour and streamflow, streambed, and...
Theoretical considerations and a simple method for measuring alkalinity and acidity in low-pH waters by gran titration
J. L. Barringer, P.A. Johnsson
1996, Water-Resources Investigations Report 89-4029
Titrations for alkalinity and acidity using the technique described by Gran (1952, Determination of the equivalence point in potentiometric titrations, Part II: The Analyst, v. 77, p. 661-671) have been employed in the analysis of low-pH natural waters. This report includes a synopsis of the theory and calculations associated with...
Merged GLORIA sidescan and hydrosweep pseudo-sidescan: Processing and creation of digital mosaics
R.T. Bird, R. C. Searle, V. Paskevich, D.C. Twichell
1996, Marine Geophysical Research (18) 651-661
We have replaced the usual band of poor-quality data in the near-nadir region of our GLORIA long-range sidescan-sonar imagery with a shaded-relief image constructed from swath bathymetry data (collected simultaneously with GLORIA) which completely cover the nadir area. We have developed a technique to enhance these "pseudo-sidescan" images in order...