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Page 3482, results 87026 - 87050

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Spatial variation in hydraulic conductivity determined by slug tests in the Canadian River alluvium near the Norman Landfill, Norman, Oklahoma
Martha A. Scholl, Scott C. Christenson
1998, Water-Resources Investigations Report 97-4292
Slug tests were used to characterize hydraulic conductivity variations at a spatial scale on the order of meters in the alluvial aquifer downgradient of the Norman Landfill. Forty hydraulic conductivity measurements were made, most along a 215-meter flow path transect. Measured hydraulic conductivity, excluding clayey layers, ranged from 8.4 x...
Rainfall in and near Du Page County, Illinois, October 1991-September 1995
T. D. Straub, Nancy J. Hornewer, James J. Duncker
1998, Open-File Report 97-582
Twenty-four hour rainfall data are presented for 11 rain gages in and near Du Page County, Illinois. Daily rainfall totals were recorded from October 1, 1991, to September 30, 1995. Station descriptions include site identifiers, locations, drainage basins, types of instrumentation, accuracy, and periods of record. Missing and partial rainfall...
Descriptions of selected digital spatial data for Ravenna Army Ammunition Plant, Ohio
C. W. Schalk, R.A. Darner
1998, Open-File Report 97-802
Digital spatial data of Ravenna Army Ammunition Plant (RVAAP), in northeastern Ohio, were compiled or generated from existing maps for U.S. Army Industrial Operations Command. The data are in the Ohio north state-plane coordinate system (North American Datum of 1983) in an ARC/INFO geographic information system format. The data comprise...
Status yields and trends of nutrients and sediment and methods of analysis for nontidal data-collection programs, Chesapeake Bay basin, 1985-96
Michael J. Langland, Robert E. Edwards, Linda C. Darrell
1998, Open-File Report 98-17
Data from more than 200 sites in nontidal portions of the Chesapeake Bay were compiled to document annual nutrient and sediment loads and trends for the period 1985 through 1996 as part of the 1997 Reevaluation of the Chesapeake Bay Program goal of reducing nutrient loads 40 percent by the year 2000. Annual...
Estimation of roughness coefficients for natural stream channels with vegetated banks
William F. Coon
1998, Water Supply Paper 2441
Roughness coefficients for 21 stream sites in New York state are presented. The site-specific relation between roughness coefficent and flow depth varies in a predictable manner, depending on energy gradient, relative smoothness (Rd50), and channel-vegetation density. The percentage of wetted perimeter that is vegetated is a useful indicator of when...
Concentration data and dimensionality in groundwater models: Evaluation using inverse modelling
H.C. Barlebo, M. C. Hill, D. Rosbjerg, K.H. Jensen
1998, Nordic Hydrology (29) 149-178
A three-dimensional inverse groundwater flow and transport model that fits hydraulic-head and concentration data simultaneously using nonlinear regression is presented and applied to a layered sand and silt groundwater system beneath the Grindsted Landfill in Denmark. The aquifer is composed of rather homogeneous hydrogeologic layers. Two issues common to groundwater...
The Loma Prieta, California, earthquake of October 17, 1989: Landslides
David K. Keefer, Michael W. Manson, Gary B. Griggs, Nathaniel Plant, Robert L. Schuster, Gerald F. Wieczorek, David G. Hope II, Edwin Harp, J. M. Nolan, Gerald E. Weber, William F. Cole, Dale R. Marcum, Patrick O. Shires, Bruce R. Clark
David K. Keefer, editor(s)
1998, Professional Paper 1551-C
Central California, in the vicinity of San Francisco and Monterey Bays, has a history of fatal and damaging landslides, triggered by heavy rainfall, coastal and stream erosion, construction activity, and earthquakes. The great 1906 San Francisco earthquake (MS=8.2-8.3) generated more than 10,000 landslides throughout an area of 32,000 km2; these...
Paleogeography of the western Transverse Range province, California; new evidence from the late Oligocene and early Miocene Vaqueros Formation; Stratigraphy of the fine-grained facies of the Sisquoc Formation, Santa Maria Basin, California; paleoceanographic and tectonic implications; The Sisquoc Formation-Foxen Mudstone boundary in the Santa Maria Basin, California; sedimentary response to the new tectonic regime
Catherine A. Rigsby, Pedro C. Ramirez, Robert E. Garrison, Richard J. Behl, James C. Ingle Jr.
Margaret A. Keller, editor(s)
1998, Bulletin 1995-T,U,V
Chapter C. The Loma Prieta, California, Earthquake of October 17, 1989 - Building Structures
Mehmet Çelebi
1998, Professional Paper 1552-C
Several approaches are used to assess the performance of the built environment following an earthquake -- preliminary damage surveys conducted by professionals, detailed studies of individual structures, and statistical analyses of groups of structures. Reports of damage that are issued by many organizations immediately following an earthquake play a key...
Methods for estimating tributary streamflow in the Chattahoochee River basin between Buford Dam and Franklin, Georgia
Timothy C. Stamey
1998, Open-File Report 98-63
Simple and reliable methods for estimating hourly streamflow are needed for the calibration and verification of a Chattahoochee River basin model between Buford Dam and Franklin, Ga. The river basin model is being developed by Georgia Department of Natural Resources, Environmental Protection Division, as part of their Chattahoochee River Modeling...