Conference Papers
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Automated generation of shaded relief in aeronautical charts
No abstract available.
Authors
Donna K. Scholz, S. W. Doescher, R. A. Hoover
A model for tides and currents in the English Channel and southern North Sea
The amplitude and phase of 11 tidal constituents for the English Channel and southern North Sea are calculated using a frequency domain, finite element model. The governing equations - the shallow water equations - are modifed such that sea level is calculated using an elliptic equation of the Helmholz type followed by a back-calculation of velocity using the primitive momentum equations. Triangul
Authors
Roy A. Walters
A rationale for considering the geographic information system database an asset
No abstract available.
Authors
Michael L. Sety, Kang-tsung Chang
ANALYSIS OF ESTUARINE TRACER-GAS TRANSPORT AND DESORPTION.
The riverine tracer-gas technique provides a direct, reach-averaged measure of gas exchange, is fairly simple to implement, and is widely accepted for determining reaeration-rate coefficients in rivers. The method, however, is not directly applicable to flows having vertical density gradients. Consequently, studies were undertaken to develop and evaluate methods for obtaining surface-exchange coef
Authors
Jerad D. Bales, Edward R. Holley
Astoria Fan, a trench-filling elongate deep-sea fan
No abstract available
Authors
C.H. Nelson, M. A. Hampton, H. A. Karl, J. H. Barber
Can Pacific halibut (Hippoglossus stenolepis) be cultured in captivity?
No abstract available
Authors
S.D. Smith, R.R. Stickney, W.W. Dickhoff, S. Kaimer, L.H. Wu
Decomposition rates of peat in drained and undrained wetlands
No abstract available.
Authors
J. M. Friedman
DEFORESTATION AND LANDSLIDES IN YUNNAN, CHINA.
Landslides historically have caused severe erosion problems in the Xiao River drainage region of northeastern Yunnan Province, China, that hence resulted in serious economic and social consequences. Owing to monsoonal storms of high rainfall intensity, the erosion potential is high in this mountainous, seismically active region. Landslides transported large quantities of materials into the ravines
Authors
Gerald F. Wieczorek, Jishan Wu, Tianchi Li
Development and evaluation of a system for tracking wildlife by satellite
No abstract available.
Authors
S.G. Fancy, L.F. Pank, David C. Douglas, Catherine H. Curby, Gerald W. Garner, Steven C. Amstrup, Wayne L. Regelin
DISCHARGE AND DEPTH BEHIND A PARTIALLY BREACHED DAM.
The role that the velocity-distribution correction factor plays in the determination of the flood discharge and corresponding flow depth behind a partially breached dam is investigated. Assumption of a uniformly progressive flow for an established dam-break flood in a rectangular channel of infinite extent leads to the formulation of a theoretical relation between the depth and velocity of flow ex
Authors
Cheng-lung Chen
DISTRIBUTED GROUND-WATER DATA BASE OF THE U. S. G. S.
During the past 20 years, the ground-water data base of the U. S. Geological Survey has evolved from paper files in local offices, to a national data base on a central mainframe computer, to a distributed data base on a network of 49 minicomputers throughout the United States. Users in local offices have easy, inexpensive access to the distributed data base. The distributed data base has caused so
Authors
Richard R. Luckey
EFFECT OF STREAMFLOW CONDITIONS ON GAS-TRANSFER COEFFICIENTS.
Contrary to the findings of previous studies of channel-controlled stream reaches, it was found that, in four reaches of a small stream characterized by a series of pools and riffles, reaeration coefficients decrease with decreasing discharge. In the reach with the most pool-and-riffle development, the measured rearation coefficient under low-flow conditions was 86 percent less than its value duri
Authors
James L. Smoot