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Seismic design parameters - A user guide
E. V. Leyendecker, A.D. Frankel, K.S. Rukstales
2001, Open-File Report 2001-437
The 1997 NEHRP Recommended Provisions for Seismic Regulations for New Buildings (1997 NEHRP Provisions) introduced seismic design procedure that is based on the explicit use of spectral response acceleration rather than the traditional peak ground acceleration and/or peak ground velocity or zone factors. The spectral response accelerations are obtained from...
MODFLOW-2000, the U.S. Geological Survey modular ground-water model: User guide to the LMT6 package, the linkage with MT3DMS for multi-species mass transport modeling
Chunmiao Zheng, Mary Catherine Hill, Paul A. Hsieh
2001, Open-File Report 2001-82
MODFLOW-2000, the newest version of MODFLOW, is a computer program that numerically solves the three-dimensional ground-water flow equation for a porous medium using a finite-difference method. MT3DMS, the successor to MT3D, is a computer program for modeling multi-species solute transport in three-dimensional ground-water systems using multiple solution techniques, including the...
Global Positioning System (GPS) survey of Augustine Volcano, Alaska, August 3-8, 2000: data processing, geodetic coordinates and comparison with prior geodetic surveys
Benjamin A. Pauk, John A. Power, Mike Lisowski, Daniel Dzurisin, Eugene Y. Iwatsubo, Tim Melbourne
2001, Open-File Report 2001-99
Between August 3 and 8,2000,the Alaska Volcano Observatory completed a Global Positioning System (GPS) survey at Augustine Volcano, Alaska. Augustine is a frequently active calcalkaline volcano located in the lower portion of Cook Inlet (fig. 1), with reported eruptions in 1812, 1882, 1909?, 1935, 1964, 1976, and 1986 (Miller et...
Evaluation of nonpoint-source contamination, Wisconsin: water year 1999
John F. Walker, D.J. Graczyk, Steven R. Corsi, J.A. Wierl, D.W. Owens
2001, Open-File Report 2001-105
The objective of the watershed-management evaluation monitoring program in Wisconsin is to evaluate the effectiveness of best-management practices (BMPs) for controlling nonpoint-source pollution in rural and urban watersheds. This progress report provides a summary of the data collected by the U.S Geological Survey for the program and a discussion of...
Potentiometric surface of the Magothy aquifer in southern Maryland, September 1999
Stephen E. Curtin, David C. Andreasen, Judith C. Wheeler
2001, Open-File Report 2001-206
This report presents a map showing the change in the potentiometric surface of the Lower Patapsco aquifer in the Lower Patapsco Formation of Cretaceous age in Southern Maryland for September 1990 and September 1999. The map, based on water?level measurements in 52 wells, shows that the change of the potentiometric...
Use of InSAR to identify land-surface displacements caused by aquifer-system compaction in the Paso Robles area, San Luis Obispo County, California, March to August 1997
David W. Valentine, Jill N. Densmore, Devin L. Galloway, Falk Amelung
2001, Open-File Report 2000-447
The population in San Luis Obispo County has grown steadily during the 1990s, and some land use has been converted from dry farming to grazing to irrigated vineyards and urban areas. Because insufficient surface-water supplies are available to meet the growing demand, ground-water pumpage has increased and the resulting water-level...
Simulation of ground water flow in the Glaciofluvial, Saginaw, Parma-Bayport, and Marshall Aquifers, Central Lower Peninsula of Michigan
John Robert Hoaglund III, G.C. Huffman, N.J. Granneman
2000, Open-File Report 2000-504
A steady-state finite difference model was developed to simulate ground-water flow in four regional aquifers in Michigan’s Lower Peninsula. The Glaciofluvial, Saginaw, Parma-Bayport, and Marshall aquifers were simulated as layers 1 through 4, respectively, in the model. Separately calculated vertical conductances input to the model were used to simulate the...
Airborne geophysical surveys in the Boulder Watershed, Jefferson and Lewis and Clark Counties, Montana
Bruce D. Smith, Victor Franklin Labson, Patricia L. Hill
2000, Open-File Report 2000-240
INTRODUCTIONThree airborne geophysical surveys have been made in the Boulder watershed and adjacent areas (fig. 1). The objectives of the geophysical studies in the watershed is to map subsurface lithologic, structural and hydrologic features important in controlling possible ground water contamination from mining activities and to design remediation efforts. These studies are part of an abandoned...
Creating a standardized watersheds database for the Lower Rio Grande/Río Bravo, Texas
J.R. Brown, Randy L. Ulery, Jean W. Parcher
2000, Open-File Report 00-065
This report describes the creation of a large-scale watershed database for the lower Rio Grande/Río Bravo Basin in Texas. The watershed database includes watersheds delineated to all 1:24,000-scale mapped stream confluences and other hydrologically significant points, selected watershed characteristics, and hydrologic derivative datasets.<span size="3" data-mce-style="font-size:...
Statistical Approaches to Interpretation of Local, Regional, and National Highway-Runoff and Urban-Stormwater Data
Gary D. Tasker, Gregory E. Granato
2000, Open-File Report 2000-491
Decision makers need viable methods for the interpretation of local, regional, and national-highway runoff and urban-stormwater data including flows, concentrations and loads of chemical constituents and sediment, potential effects on receiving waters, and the potential effectiveness of various best management practices (BMPs). Valid (useful for intended purposes), current, and technically...
Water-quality and ground-water-level trends, 1990-99, and data collected from 1995 through 1999, East Mountain area, Bernalillo County, central New Mexico
D.R. Rankin
2000, Open-File Report 2000-476
Bernalillo County officials recognize the importance of monitoring water quality and ground-water levels in rapidly developing areas. For this reason, water-quality and ground-water- level data were collected from 87 wells, 3 springs, and the Ojo Grande Acequia in the east mountain area of Bernalillo County between January 1990 and June 1999....