Recent developments in three-dimensional numerical estuarine models
Ralph T. Cheng, Peter E. Smith, Vincenzo Casulli
1993, Conference Paper, Hydraulic Engineers
For a fixed cost, computing power increases 5 to 10 times every five years. The readily available computing resources have inspired new modal formulations and innovative model applications. Significant progress has been advanced in three-dimensional numerical estuarine modeling within the past three or four years. This paper attempts to review...
Simulating the variable-source-area concept of streamflow generation with the watershed model TOPMODEL
D.M. Wolock
1993, Water-Resources Investigations Report 93-4124
This report describes TOPMODEL, which is a physically based watershed model that simulates the variable-source-area concept of streamflow generation. The report describes the theoretical background, model equations, methods to determine parameter values, Fortran computer code, and an example interactive simulation. Using TOPMODEL requires specification of soils and topographic parameters, watershed...
Grade and tonnage model of Porphyry Cu deposits in British Columbia, Canada, and Alaska, U.S.A.
W. David Menzie, Donald A. Singer
1993, Open-File Report 93-275
Method for predicting water demand for crop uses in New Jersey in 1990, 2000, 2010, and 2020, and for estimating water use for livestock and selected sectors of the food-processing industry in New Jersey in 1987
R.M. Clawges, E.O. Titus
1993, Water-Resources Investigations Report 92-4145
A method was developed to predict water demand for crop uses in New Jersey. A separate method was developed to estimate water use for livestock and selected sectors of the food-processing industry in 1987. Predictions of water demand for field- grown crops in New Jersey were made for...
Geohydrology and simulation of ground-water flow in the Red Clay Creek Basin, Chester County, Pennsylvania, and New Castle County, Delaware
Karen L. Vogel, Andrew G. Reif
1993, Water-Resources Investigations Report 93-4055
The 54-square-mile Red Clay Creek Basin, located in the lower Delaware River Basin, is underlain primarily by metamorphic rocks that range from Precambrian to Lower Paleozoic in age. Ground water flows through secondary openings in fractured crystalline rock and through primary openings below the water table in the overlying saprolite....
Proceedings of the Federal Interagency Workshop on Hydrologic Modeling Demands for the 90's
J.S. Burton
1993, Water-Resources Investigations Report 93-4018
Conceptual evaluation of regional ground-water flow in the carbonate-rock province of the Great Basin, Nevada, Utah, and adjacent states
David E. Prudic, J. R. Harrill, T. J. Burbey
1993, Open-File Report 93-170
The regional groundwater flow system in the carbonate rocks of Nevada and Utah is conceptualized as shallow systems superimposed on deeper systems, which transmit water primarily through carbonate rocks. A computer model was used to simulate the two systems. The regional model includes simplifying assumptions that are probably valid for...
Executive summary; application of a hydrochemical model and soil-solution mixing model to alpine watersheds in the Sierra Nevada, California
R. P. Hooper, N.E. Peters
1993, Open-File Report 93-59
Hydrogeology, water quality, and ground-water-development alternatives in the upper Wood River ground-water reservoir, Rhode Island
D.C. Dickerman, R.W. Bell
1993, Water-Resources Investigations Report 92-4119
The 72.4-square-mile Upper Wood River study area is in the Pawcatuck River basin in southern Rhode Island. Stratified drift is the only principal geologic unit capable of producing yields greater than 0.5 Mgal/d. Transmissivity of the aquifer ranges from 7,600 to 49,200 sq ft/d. Water-table conditions prevail and the aquifer...
Estimation of peak-frequency relations, flood hydrographs, and volume-duration-frequency relations of ungaged small urban streams in Ohio
J. M. Sherwood
1993, Open-File Report 93-135
Methods are presented to estimate peak-frequency relations, flood hydrographs, and volume-duration-frequency relations of urban streams in Ohio with drainage areas less than 6.5 square miles. The methods were developed to assist planners in the design of hydraulic structures for which hydrograph routing is required or where the temporary storage of...
Saltwater in shallow aquifers in east-central and northeastern Louisiana and southeastern Arkansas
G. F. Huff, J.P. Bonck
1993, Open-File Report 93-494
The chemistry of water from irrigation and monitor wells in east-central Louisiana indicates the presence of saltwater in the Mississippi River alluvial aquifer and the uppermost part of the Jasper aquifer system. The salinity of this groundwater makes it unsuitable for use in irrigation of salt-sensitive crops. The geochemistry of...
An optimization model for selecting training course locations, U.S. Geological Survey
Timothy A. Cohn, William G. Baier
1993, Open-File Report 93-123
Effects of well discharges on hydraulic heads in and spring discharges from the geothermal aquifer system in the Bruneau area, Owyhee County, southwestern Idaho
Charles Berenbrock
1993, Water-Resources Investigations Report 93-4001
Demand for ground water in the 600- square-mile Bruneau study area has increased since 1954 because of agricultural development. Declining flow at Indian Bathtub Spring is adversely affecting a unique species of snail that inhabits the spring. The Bruneau study area is underlain by sedimentary and volcanic rocks that form a...
Data-collection methods and data summary for verification of a one-dimensional, unsteady-flow model of the Fox River in northeastern Illinois, October-November 1990
M.J. Turner
1993, Open-File Report 93-483
Synoptic-study measurements of unsteady streamflow and dye concentrations were collected on a 49.4-mile reach of the Fox River in south-eastern Wisconsin and northeastern Illinois in October and November 1990. The study area included the Fox River and its major tributaries from Wilmot, Wis., downstream to South Elgin, Ill. The measurements...
Estimation of unit hydrographs for large floods at ungaged sites in Montana
S.R. Holnbeck, Charles Parrett
1993, Open-File Report 93-168
Methods were developed for estimating unit hydro- graphs at ungaged sites in Montana using either the Clark or dimensionless unit-hydrograph method. Flood hydrograph data for 26 U.S. Geological Survey streamflow-gaging stations and rainfall data were used together with a rainfall-runoff simulation model (HEC-1) to derive unit hydrographs and important unit-hydrograph...
Earthquake locations determined by the Southern Alaska seismograph network for October 1971 through May 1989
Kent A. Fogleman, John C. Lahr, Christopher D. Stephens, Robert A. Page
1993, Open-File Report 93-309
This report describes the instrumentation and evolution of the U.S. Geological Survey’s regional seismograph network in southern Alaska, provides phase and hypocenter data for seismic events from October 1971 through May 1989, reviews the location methods used, and discusses the completeness of the catalog and the accuracy of the computed...
Guidelines for the processing and quality assurance of benthic invertebrate samples collected as part of the National Water-Quality Assessment Program
T. F. Cuffney, M. E. Gurtz, M. R. Meador
1993, Open-File Report 93-407
Benthic invertebrate samples are collected as part of the U.S. Geological Survey's National Water-Quality Assessment Program. This is a perennial, multidisciplinary program that integrates biological, physical, and chemical indicators of water quality to evaluate status and trends and to develop an understanding of the factors controlling observed water quality. The...
Integrating a resource assessment model into arc/info GIS: A spatial decision support system development
Wei Ji
1993, Conference Paper, 1993 ACSM/ASPRS annual convention & exposition : ASPRS technical papers
No abstract available....
Predictive modeling of the seismic cycle of the greater San Francisco Bay region
C. G. Bufe, D. J. Varnes
1993, Journal of Geophysical Research (98) 9871-9883
The seismic cycle for the San Francisco Bay region is synthesized by a model combining the pre- and post-1906 seismic histories. The long-term acceleration of seismic release (seismic moment, Benioff strain release, or event count) in the seismic cycle and the shorter-term accelerations preceding the larger earthquakes within that cycle...
Quaternary tectonics of Utah with emphasis on earthquake-hazard characterization
Suzanne Hecker
1993, Bulletin 127
This report consolidates and synthesizes information on Quaternary faulting, folding, and volcanism in Utah and characterizes recent tectonic activity throughout the state. The primary purpose is to provide a comprehensive reference on faultspecific seismic sources and surface rupture to facilitate the evaluation of earthquake hazards in Utah. Two 1:500,000-scale maps...
The role of epiphytes in seagrass production and survival: Microcosm studies and simulation modeling
Hilary A. Neckles
1993, Conference Paper, Proceedings and conclusions of workshops on: Submerged aquatic vegetation initiative and photosynthetically active radiation
No abstract available....
Regional stratigraphic framework of surficial sediments and bedrock beneath Lake Ontario
D. R. Hutchinson, C.F. Lewis, G. Hund
1993, Geographie Physique et Quaternaire (47) 337-352
Approximately 2550 km of single-channel high-resolution seismic reflection profiles have been interpreted and calibrated with lithological and geochronological information from four representative piston cores and one grab sample to provide a regional stratigraphie framework for the subbottom deposits of Lake Ontario. Five units overlying Paleozoic bedrock were identified and mapped....
Three-dimensional lithostratigraphic model at Yucca Mountain, Nevada: A framework for fluid transport modeling and engineering design
David C. Buesch, R.W. Spengler, J.E. Nelson, R. P. Dickerson
1993, Conference Paper, FOCUS'93: Site Characterization and Model Validation
A three-dimensional lithostratigraphic model of the central block of Yucca Mountain, Nevada, illustrates how some activities can serve both site characterization and design and construction of the Exploratory Studies Facility (ESF). Site-characterization activities supported by this model include characterizing the three-dimensional geometry of lithologic units and faults, and providing boundary...
Modelling passive margin sequence stratigraphy
M.S. Steckler, D. Reynolds, B. Coakley, B.A. Swift, R. D. Jarrard
1993, Book chapter, Sequence Stratigraphy and Facies Associations
We have modelled stratigraphic sequences to aid in deciphering the sedimentary response to sea-level change. Sequence geometry is found to be most sensitive to sea level, but other factors, including subsidence rate and sediment supply, can produce similar changes. Sediment loading and compaction also play a major role in generating...
Ground water discharge and the related nutrient and trace metal fluxes into Quincy bay, Massachusetts
Lawrence J. Poppe, A.M. Moffett
1993, Environmental Monitoring and Assessment (25) 15-27
Measurement of the rate and direction of ground water flow beneath Wollaston Beach, Quincy, Massachusetts by use of a heat-pulsing flowmeter shows a mean velocity in the bulk sediment of 40 cm d−1. The estimated total discharge of ground water into Quincy Bay during October 1990 was 1324–2177 m3 d−1,...
