Publications
Publications authored by the Nevada Water Science Center scientists are listed below. Older publications may not be available in electronic form yet. If a Nevada Water Science Center publication that you would like to view isn't listed below, please send email to GS-W-NVpublic-info@ usgs.gov.
Filter Total Items: 379
A guide for using the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California
This report is a guide for executing numerical simulations with the transient ground-water flow model of the Death Valley regional ground-water flow system, Nevada and California using the U.S. Geological Survey modular finite-difference ground-water flow model, MODFLOW-2000. Model inputs, including observations of hydraulic head, discharge, and boundary flows, are summarized. Modification of the
Authors
Joan B. Blainey, Claudia C. Faunt, Mary C. Hill
Documentation of a spreadsheet for time-series analysis and drawdown estimation
Drawdowns during aquifer tests can be obscured by barometric pressure changes, earth tides, regional pumping, and recharge events in the water-level record. These stresses can create water-level fluctuations that should be removed from observed water levels prior to estimating drawdowns. Simple models have been developed for estimating unpumped water levels during aquifer tests that are referred t
Authors
Keith J. Halford
MODOPTIM: A general optimization program for ground-water flow model calibration and ground-water management with MODFLOW
MODOPTIM is a non-linear ground-water model calibration and management tool that simulates flow with MODFLOW-96 as a subroutine. A weighted sum-of-squares objective function defines optimal solutions for calibration and management problems. Water levels, discharges, water quality, subsidence, and pumping-lift costs are the five direct observation types that can be compared in MODOPTIM. Differences
Authors
Keith J. Halford
Water Budgets and Potential Effects of Land- and Water-Use Changes for Carson Valley, Douglas County, Nevada, and Alpine County, California
To address concerns over continued growth in Carson Valley, the U.S. Geological Survey, in cooperation with Douglas County, Nevada, began a study in February 2003 to update estimates of water-budget components in Carson Valley. Estimates of water-budget components were updated using annual evapotranspiration (ET) rates, rates of streamflow loss to infiltration and gain from ground-water seepage, a
Authors
Douglas K. Maurer, David L. Berger
Evaporation from Lake Mead, Arizona and Nevada, 1997-99
Lake Mead is one of a series of large Colorado River reservoirs operated and maintained by the Bureau of Reclamation. The Colorado River system of reservoirs and diversions is an important source of water for millions of people in seven Western States and Mexico. The U.S. Geological Survey, in cooperation with the Bureau of Reclamation, conducted a study from 1997 to 1999 to estimate evaporation f
Authors
Craig L. Westenburg, Guy A. DeMeo, Daron J. Tanko
Multiphase, multicomponent parameter estimation for liquid and vapor fluxes in deep arid systems using hydrologic data and natural environmental tracers
Multiphase, multicomponent numerical models of long-term unsaturated-zone liquid and vapor movement were created for a thick alluvial basin at the Nevada Test Site to predict present-day liquid and vapor fluxes. The numerical models are based on recently developed conceptual models of unsaturated-zone moisture movement in thick alluvium that explain present-day water potential and tracer profiles
Authors
Edward M. Kwicklis, Andrew V. Wolfsberg, Philip H. Stauffer, Michelle Ann Walvoord, Michael J. Sully
Evaluating hydraulic conductivity of desert soils at the Amargosa Desert Research Site near Beatty, Nevada
No abstract available.
Authors
J.W. Wilson
Plant-based plume-scale mapping of tritium contamination in desert soils
Plant-based techniques were tested for field-scale evaluation of tritium contamination adjacent to a low-level radioactive waste (LLRW) facility in the Amargosa Desert, Nevada. Objectives were to (i) characterize and map the spatial variability of tritium in plant water, (ii) develop empirical relations to predict and map subsurface contamination from plant-water concentrations, and (iii) gain ins
Authors
Brian J. Andraski, David A. Stonestrom, R. L. Michel, K. J. Halford, J.C. Radyk
Science to sustain terminal lakes: The Walker River Basin Study
Section 2507 of Public Law 107-171 (2002 Farm Bill) provided $200,000,000 to be used by the Secretary of the Interior, acting through the Commissioner of Reclamation, to provide water to at-risk natural desert terminal lakes. This bill was later amended under Public Law 108-7, Section 207 to include language 'Restoration of fish, wildlife, and associated habitats in watersheds of certain lakes'. T
Authors
Documentation of the Streamflow-Routing (SFR2) Package to Include Unsaturated Flow Beneath Streams - A Modification to SFR1
Many streams in the United States, especially those in semiarid regions, have reaches that are hydraulically disconnected from underlying aquifers. Ground-water withdrawals have decreased water levels in valley aquifers beneath streams, increasing the occurrence of disconnected streams and aquifers. The U.S. Geological Survey modular ground-water model (MODFLOW-2000) can be used to model these int
Authors
Richard G. Niswonger, David E. Prudic
Changes in ground-water flow and chemistry after completion of Cattlemans detention basin, south Lake Tahoe, California -- November 2001 to November 2003
No abstract available.
Authors
David E. Prudic, Jena M. Green, James L. Wood, Katherine K. Henkelman