Field methods for measurement of fluvial sediment
Thomas K. Edwards, G. Douglas Glysson
1999, Techniques of Water-Resources Investigations 03-C2
This chapter describes equipment and procedures for collection and measurement of fluvial sediment. The complexity of the hydrologic and physical environments and man's ever-increasing data needs make it essential for those responsible for the collection of sediment data to be aware of basic concepts involved in processes of erosion, transport,...
Sea-level rise and coastal forests on the Gulf of Mexico
Kimberlyn Williams, Zuleika S. Pinzon, Richard P. Stumpf, Ellen A. Raabe
1999, Open-File Report 99-441
In this report, we review literature pertaining to the response of coastal forests on the Gulf of Mexico to sea-level rise. The report is divided into chapters that discuss effects of sea-level rise on non-mangrove forests, effects of sea-level rise on mangrove forests, and responses of Gulf coast trees to...
Manual del McVCO 1999
P.J. McChesney
1999, Open-File Report 99-361-S
El McVCO es un generador de frecuencias basado en un microcontrolador que reemplaza al oscilador controlado por voltaje (VCO) utilizado en telemetría analógica de datos sísmicas. Acepta señales de baja potencia desde un sismómetro y produce una señal subportadora modulada en frecuencia adecuada para enlaces telefónicos o vía radio a...
Spatial Data Transfer Standard (SDTS)
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 077-99
The American National Standards Institute?s (ANSI) Spatial Data Transfer Standard (SDTS) is a mechanism for archiving and transferring of spatial data (including metadata) between dissimilar computer systems. The SDTS specifies exchange constructs, such as format, structure, and content, for spatially referenced vector and raster (including gridded) data. The SDTS includes a...
An evaluation of alternative chemical classifications of sandstones
D. A. Lindsey
1999, Open-File Report 99-346
Chemical classification of sandstone is worth attempting because modern analytical methods are producing extensive data sets on rock composition. Previous compilations and statistical studies have demonstrated the application of chemical data to problems in sandstone petrology, but classification has been largely ignored. Chemical data has value for classification, but the...
U.S. Geological Survey and Microsoft Cooperative Research and Development Agreement: Geospatial Data Browsing and Retrieval Site on the World Wide Web
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 072-99
In May 1997, the U.S. Geological Survey (USGS) and the Microsoft Corporation of Redmond, Wash., entered into a cooperative research and development agreement (CRADA) to make vast amounts of geospatial data available to the general public through the Internet. The CRADA is a 36-month joint effort to develop a general,...
Model input and output files for the simulation of time of arrival of landfill leachate at the water table, Municipal Solid Waste Landfill Facility, U.S. Army Air Defense Artillery Center and Fort Bliss, El Paso County, Texas
Cynthia G. Abeyta, Peter F. Frenzel
1999, Open-File Report 98-397
This report contains listings of model input and output files for the simulation of the time of arrival of landfill leachate at the water table from the Municipal Solid Waste Landfill Facility (MSWLF), about 10 miles northeast of downtown El Paso, Texas. This simulation was done by the U.S. Geological...
The National Hydrography Dataset
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 106-99
The National Hydrography Dataset (NHD) is a newly combined dataset that provides hydrographic data for the United States. The NHD is the culmination of recent cooperative efforts of the U.S. Environmental Protection Agency (USEPA) and the U.S. Geological Survey (USGS). It combines elements of USGS digital line graph (DLG) hydrography...
Evaluation of processes affecting 1,2-dibromo-3-chloropropane (DBCP) concentrations in ground water in the eastern San Joaquin Valley, California: Analysis of chemical data and ground-water flow and transport simulations
Karen R. Burow, Sandra Y. Panshin, Neil H. Dubrovsky, David Vanbrocklin, Graham E. Fogg
1999, Water-Resources Investigations Report 99-4059
Future use of the sole-source aquifer near Fresno in the eastern San Joaquin Valley, California, will depend, in part, on how long 1,2-dibromo-3-chloropropane (DBCP), an agricultural fumigant banned from use since the late 1970's, persists at concentrations greater than the maximum contaminant level of 0.2 micrograms per liter (mg/L). Field...
USGS ground-water flow model : an essential tool for managing the water supply of the Virginia Coastal Plain
Martha L. Erwin, Randolph E. McFarland, Bruce T. Scott
1999, Fact Sheet 099-99
Virginia needs a reliable water supply to sustain its growing population and expanding economy. In 1990, the aquifers in the Coastal Plain supplied about 100 million gallons per day (mgd) to the citizens, businesses, and industries of Virginia. It is estimated that by the year 2000, demand will increase by...
Simulation of the effects of nearby quarrying operations on ground-water flow at the South Well Field, Franklin County, Ohio
Gregory M. Nalley, Ralph J. Haefner
1999, Water-Resources Investigations Report 99-4136
The City of Columbus, Ohio, operates a municipal well field in southern Franklin County that is adjacent to a sand and gravel mining operation. Mining operations have the potential to alter ground-water flowpaths and change the sources of water to pumped wells. Previous ground-water-flow modeling of the area has shown...
Simulation of ground-water system response to proposed withdrawals from 1993 to 2043 in the northern part of Juab Valley, Juab County, Utah
Susan A. Thiros
1999, Water-Resources Investigations Report 98-4262
Information on the ground-water system in the northern part of Juab Valley, Utah, is needed by water managers to plan the optimal use of surface water that will be imported by the Central Utah Project and ground water pumped locally. The response of the ground-water system to an increase in...
Ground-water flow, solute transport, and simulation of remedial alternatives for the water-table aquifer in Vega Alta, Puerto Rico
Nicasio Sepulveda
1999, Water-Resources Investigations Report 97-4170
The water-table aquifer in Vega Alta, Puerto Rico, has been contaminated with volatile organic compounds. A three-dimensional ground-waterflow and solute-transport model was developed and calibrated to evaluate the effects of remedial alternatives designed to reduce the magnitude and extent of a trichloroethylene plume in the water-table aquifer. The development of...
Health of native riparian vegetation and its relation to hydrologic conditions along the Mojave River, southern California
Gregory C. Lines
1999, Water-Resources Investigations Report 99-4112
The health of native riparian vegetation and its relation to hydrologic conditions were studied along the Mojave River mainly during the growing seasons of 1997 and 1998. The study concentrated on cottonwood-willow woodlands (predominantly Populus fremontii and Salix gooddingii) and mesquite bosques (predominantly Prosopis glandulosa). Tree-growth characteristics were measured at...
Analysis of land use change in urban environments
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 188-99
Metropolitan areas in the United States are growing at unprecedented rates, creating extensive urban landscapes. Many of the farmlands, wetlands, forests, and deserts that formed the America of 1900 have been transformed during the past 100 years into human settlements. Almost everyone has seen these changes to their local environment...
Numerical simulation of vertical ground-water flux of the Rio Grande from ground-water temperature profiles, central New Mexico
James R. Bartolino, Richard G. Niswonger
1999, Water-Resources Investigations Report 99-4212
An important gap in the understanding of the hydrology of the Middle Rio Grande Basin, central New Mexico, is the rate at which water from the Rio Grande recharges the Santa Fe Group aquifer system. Several methodologies-including use of the Glover-Balmer equation, flood pulses, and channel permeameters- have been applied...
Induced infiltration from the Rockaway River and water chemistry in a stratified-drift aquifer at Dover, New Jersey, with a section on modeling ground-water flow in the Rockaway River Valley
Joel E. Dysart, Stephen J. Rheaume, Angelo L. Kontis
1999, Water-Resources Investigations Report 96-4068
The vertical hydraulic conductivity per unit thickness (streambed leakance) of unconsolidated sediment immediately beneath the channel of the Rockaway River near a municipal well field at Dover, N.J., is between 0.2 and 0.6 feet per day per foot and is probably near the low end of this range. This estimate...
River-operations model for upper Carson River Basin, California and Nevada
Glen W. Hess, R. Lynn Taylor
1999, Water-Resources Investigations Report 98-4240
SutraPlot, a graphical post-processor for SUTRA, a model for ground-water flow with solute or energy transport
W. R. Souza
1999, Open-File Report 99-220
This report documents a graphical display post-processor (SutraPlot) for the U.S. Geological Survey Saturated-Unsaturated flow and solute or energy TRAnsport simulation model SUTRA, Version 2D3D.1. This version of SutraPlot is an upgrade to SutraPlot for the 2D-only SUTRA model (Souza, 1987). It has been modified to add 3D functionality, a...
A temporal and spatial analysis of ground-water levels for effective monitoring in Huron County, Michigan
David J. Holtschlag, M.J. Sweat
1999, Open-File Report 98-629
Quarterly water-level measurements were analyzed to assess the effectiveness of a monitoring network of 26 wells in Huron County, Michigan. Trends were identified as constant levels and autoregressive components were computed at all wells on the basis of data collected from 1993 to 1997, using structural time series analysis. Fixed...
Use of geochemical mass balance modelling to evaluate the role of weathering in determining stream chemistry in five mid-Atlantic watersheds on different lithologies
Anne K. O’Brien, Karen C. Rice, Owen P. Bricker, Margaret M. Kennedy, R. Todd Anderson
N.E. Peters, Owen P. Bricker, Margaret M. Kennedy, editor(s)
1998, Book chapter, Water quality trends and geochemical mass balance
No abstract available....
Instability of development and fractal architecture in dryland plants as an index of grazing pressure
C.L. Alados, J.M. Emlen, B. Wachocki, D.C. Freeman
1998, Journal of Arid Environments (38) 63-76
Developmental instability has been used to monitor the well-being of natural populations exposed to physical, chemical and biological stressors. Here, we use developmental instability to assess the impact of grazing on Chrysothamnus greenii and Seriphidium novumshrubs, and Oryzopsis hymenoidesgrass, common in the arid intermountain west of the U.S.A. Statistical noise in allometric relations was...
Modelling lake behaviour: how can we use mechanistic models to further our understanding of the response of lakes to climate change?
P. J. Bartlein, L. Bengtsson, S. P. Harrison, S. Hostetler, K. Hsu, B. Qin, J. Vassiljev
1998, Paläoklimaforschung (25) 169-177
Seasonal inorganic nitrogen release in alpine lakes on the Colorado western slope
B.I. Inyan, M.W. Williams, K. Tonnessen, J.T. Turk, Donald H. Campbell
1998, Physical Geography (19) 406-420
In the Rocky Mountains, the association of increases in acidic deposition with increased atmospheric loading of sulfate and direct changes in surface water chemistry has been well established. The importance, though, of increased nitrogen (N) deposition in the episodic acidification of alpine lakes and N saturation in alpine ecosystems is...
Book Review: Two visual programming languages for simulation modeling: Stella 5.0 and Modelmaker 3.0
J. Carter
1998, Bulletin of the Ecological Society of America (79) 237-239
No abtract available....
