Conference Papers
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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Predicting tidal currents in San Francisco Bay using a spectral model
This paper describes the formulation of a spectral (or frequency based) model which solves the linearized shallow water equations. To account for highly variable basin bathymetry, spectral solutions are obtained using the finite element method which allows the strategic placement of the computation points in the specific areas of interest or in areas where the gradients of the dependent variables
Authors
Jon R. Burau, Ralph T. Cheng
Preliminary results of the Department of the Interior's irrigation drainage studies
The Department of the Interior, in 1986, began irrigation drainage studies in nine areas in seven Western states to determine whether irrigation drainage has caused or has the potential to cause harmful effects on human health, fish, and wildlife, or might reduce the suitability of water for beneficial uses. Results of the seven studies completed in 1987 are presented and are compared to baselines
Authors
Marc A. Sylvester, Jonathan P. Deason, Herman R. Feltz, Richard A. Engberg
Rainfall intensity-duration equations
A method for rapidly developing a rainfall intensity-duration equation for durations less than one hour and recurrence intervals between 2 and 100 years for any location in the conterminous United States is presented. Optimal parameters of a general rainfall-intensity duration equation are determined using precipitation depths for durations of 5, 10, 15, 30 and 60 minutes obtained from commonly av
Authors
David C. Froehlich
Regional assessment of pumpage in southeastern Virginia
A U.S. Geological Survey investigation was conducted, in cooperation with the Virginia Water Control Board, to analyze the hydrogeology and groundwater flow system in the Coastal Plain physiographic province of southeastern Virginia, and to assess the continued reliability of groundwater as a freshwater resource. To provide a more detailed analysis of water-level decline and groundwater flow, a th
Authors
Pixie A. Hamilton
Remote sensing to petroleum exploration in the Qaidam Basin, China
No abstract available.
Authors
Wang Wenyan, Song Jianguo, Zhang Jiong, Wang Tianxi, Fan Congwu, G. B. Bailey, John L. Dwyer
Secondary mineralogy of core from geothermal drill hole CTGH-1, High Cascade Range, Oregon
Geothermal drill hole CTGH-1, located near Breitenbush Hot Springs in the Cascade Mountains of northwest Oregon, was drilled to a depth of 1463 m. The maximum reported temperature at the bottom of the drill hole was 96.4??C. The drill core consists predominantly of basalt to basaltic andesite lava flows, tuffs, and volcanic breccia. Red to orange iron-oxide stained tuffs are at least partly altere
Authors
Keith E. Bargar
Selenium in the Kendrick recalamation project, Wyoming
Elevated concentrations of selenium in water, bottom sediment, and biota were noted during a reconnaissance investigation of the Kendrick Reclamation Project in central Wyoming. Dissolved-selenium concentrations in 11 of 24 samples of surface or ground water exceeded the national drinking-water standard of 10 micrograms per liter. Bottom-sediment samples contained concentrations of several element
Authors
David A. Peterson
Simulation and video animation of canal flushing created by a tide gate
A tide-gate algorithm was added to a one-dimensional unsteady flow model that was calibrated, verified, and used to determine the locations of as many as five tide gates that would maximize flushing in two canal systems. Results from the flow model were used to run a branched Lagrangian transport model to simulate the flushing of a conservative constituent from the canal systems both with and with
Authors
David H. Schoellhamer
Simulation technique for modeling flow on floodplains and in coastal wetlands
The system design is premised on a proven, areal two-dimensional, finite-difference flow/transport model which is supported by an operational set of computer programs for input data management and model output interpretation. The purposes of the project are (1) to demonstrate the utility of the model for providing useful highway design information, (2) to develop guidelines and procedures for usin
Authors
Raymond W. Schaffranek, Robert A. Baltzer
Stochastic system identification in structural dynamics
Recently, new identification methods have been developed by using the concept of optimal-recursive filtering and stochastic approximation. These methods, known as stochastic identification, are based on the statistical properties of the signal and noise, and do not require the assumptions of current methods. The criterion for stochastic system identification is that the difference between the reco
Authors
Erdal Safak
Summary of floods and droughts in the United States
This paper describes a current national analysis of streamflow data being conducted by the U.S. Geological Survey to identify and map, in a consistent State-by-State format, the frequency and areal distribution of major floods and droughts in the United States. The work is being performed as the latest in a series of National Water Summaries published as Geological Survey Water-Supply Papers. The
Authors
Marshall E. Jennings, Richard W. Paulson
System considerations in numerical modeling of estuarine problems, in Niki, H., and Kawahara, M., eds., computational methods in flow analysis
No abstract available
Authors
R. T. Cheng, J.R. Burau