Estimation of peak-discharge frequency of urban streams in Jefferson County, Kentucky
Gary R. Martin, Kevin J. Ruhl, Brian L. Moore, Martin F. Rose
1997, Water-Resources Investigations Report 97-4219
An investigation of flood-hydrograph characteristics for streams in urban Jefferson County, Kentucky, was made to obtain hydrologic information needed for waterresources management. Equations for estimating peak-discharge frequencies for ungaged streams in the county were developed by combining (1) long-term annual peakdischarge data and rainfall-runoff data collected from 1991 to 1995...
Water Budget for the Iao Area, Island of Maui, Hawaii
Patricia J. Shade
1997, Water-Resources Investigations Report 97-4244
Ground-water recharge is estimated as the residual component of a monthly water budget calculated using soil characteristics and long-term average rainfall, streamflow, irrigation, and pan-evaporation data. The water-budget components of rainfall, direct runoff, evapotranspiration, and ground-water recharge are defined seasonally, through the use of monthly data, and spatially by land-use...
Unit-area loads of suspended sediment, suspended solids and total phosphorus from small watersheds in Wisconsin
Steven R. Corsi, David J. Graczyk, David W. Owens, Roger T. Bannerman
1997, Fact Sheet 195-97
Watershed planners in the Wisconsin Department of Natural Resources (WDNR) and in Wisconsin county governments use estimates of loads of total solids and total phosphorus in streams for numerous management purposes. A few examples of these are to establish load reduction goals, to estimate the relative magnitude of nonpoint sources...
Physical modeling of the formation and evolution of seismically active fault zones
A.V. Ponomarev, A.D. Zavyalov, V.B. Smirnov, D.A. Lockner
1997, Tectonophysics (277) 57-81
Acoustic emission (AE) in rocks is studied as a model of natural seismicity. A special technique for rock loading has been used to help study the processes that control the development of AE during brittle deformation. This technique allows us to extend to hours fault growth which would normally occur...
Glacier ice-volume modeling and glacier volumes on Redoubt Volcano, Alaska
Dennis C. Trabant, Daniel B. Hawkins
1997, Water-Resources Investigations Report 97-4187
Assessment of ice volumes and hydrologic hazards on Redoubt Volcano began four months before the 1989-90 eruptions removed 0.29 cubic kilometer of perennial snow and ice from Drift glacier. A volume model was developed for evaluating glacier volumes on Redoubt Volcano. The volume model is based on third-order polynomial simulations...
Gravity models of Abby Creek and Bion barite deposits, Howard Pass quadrangle, northwestern Brooks Range, Alaska
R. L. Morin
1997, Open-File Report 97-704
No abstract available....
Hydrogeology and water quality of a surficial aquifer underlying an urban area, Manchester, Connecticut
John R. Mullaney, Stephen J. Grady
1997, Water-Resources Investigations Report 97-4195
The quality of water along flowpaths in a surficial aquifer system in Manchester, Connecticut, was studied during 1993-95 as part of the National Water Quality Assessment program. The flowpath study examined the relations among hydrogeology, land-use patterns, and the presence of contaminants in a surficial aquifer in an urban area,...
Geohydrology and Numerical Simulation of the Ground-Water Flow System of Molokai, Hawaii
Delwyn S. Oki
1997, Water-Resources Investigations Report 97-4176
A two-dimensional, steady-state, areal ground-water flow model was developed for the island of Molokai, Hawaii, to enhance the understanding of (1) the conceptual framework of the ground-water flow system, (2) the distribution of aquifer hydraulic properties, and (3) the regional effects of ground-water withdrawals on water levels and coastal discharge....
Deep structure of Medicine Lake volcano, California
J.R.R. Ritter, J.R. Evans
1997, Tectonophysics (275) 221-241
Medicine Lake volcano (MLV) in northeastern California is the largest-volume volcano in the Cascade Range. The upper-crustal structure of this Quaternary shield volcano is well known from previous geological and geophysical investigations. In 1981, the U.S. Geological Survey conducted a teleseismic tomography experiment on MLV to explore its deeper structure....
Modeling Ground-Water Flow with MODFLOW and Related Programs
Stanley A. Leake
1997, Fact Sheet 121-97
Documentation of computer program (FHB1) for assignment of transient specified-flow and specified-head boundaries in applications of the modular finite-diference ground-water flow model (MODFLOW)
Stanley A. Leake, Michael R. Lilly
1997, Open-File Report 97-571
A computer program called the Flow and Head Boundary Package (FHB1) was developed for the U.S. Geological Survey three-dimensional finite-difference modular ground-water flow model, commonly referred to as MODFLOW. FHB1 allows MODFLOW users to specify flow or head boundary conditions that vary at times other than starting and ending times...
Karst topography; computer animations and paper model
T. R. Alpha, John P. Galloway, J. C. Tinsley III
1997, Open-File Report 97-536-A
Preliminary geologic map of the Hollywood 7.5' quadrangle, Southern California: A digital database
R. F. Yerkes, S. E. Graham
1997, Open-File Report 97-431
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map...
Hydrogeology and water chemistry of Montezuma Well in Montezuma Castle National Monument and surrounding area, Arizona
Alice D. Konieczki, Stanley A. Leake
1997, Water-Resources Investigations Report 97-4156
Increasing population and associated residential and commercial development have greatly increased water use and consumption in the Verde Valley near Montezuma Well, a unit of Montezuma Castle National Monument in central Arizona. Flow from Montezuma Well and water levels in eight wells that are measured annually do not indicate that...
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Use of a modified ultrasonic nebulizer for the analysis of low ionic-strength water by inductively coupled optical emission spectrometry
Carl M. Harris, Charles J. Litteral, Donna L. Damrau
1997, Open-File Report 97-382
The U.S. Geological Survey National Water Quality Laboratory has developed a method for the determination of dissolved calcium, iron, magnesium, manganese, silica, and sodium using a modified ultrasonic nebulizer sample-introduction system to an inductively coupled plasma-optical emission spectrometer. The nebulizer's spray chamber has been modified to avoid carryover and memory...
Preliminary geologic map of the Newbury Park 7.5' quadrangle, Southern California: A digital database
R. F. Yerkes, R. H. Campbell
1997, Open-File Report 97-459
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic...
Chicxulub impact event; computer animations and paper models
T. R. Alpha, John P. Galloway, S. W. Starratt
1997, Open-File Report 97-442-A
Water Budget for the Island of Molokai, Hawaii
Patricia J. Shade
1997, Water-Resources Investigations Report 97-4155
Ground-water recharge is estimated from a monthly water budget calculated using long-term average rainfall and streamflow data, synthesized pan-evaporation data, and soil characteristics. The water-budget components are defined seasonally, through the use of monthly data, and spatially by geohydrologic areas, through the use of a geographic information system model. The...
Evaluation of drawdown and sources of water in the Mississippi River alluvium caused by hypothetical pumping, Muscatine, Iowa
K.J. Lucey
1997, Water-Resources Investigations Report 97-4162
A study was conducted to evaluate drawdown and volumetric changes in sources of water in the Mississippi River alluvium caused by hypothetical pumping. A steady-state, ground-water flow model was constructed for a previous study to simulate February 1993 hydrologic conditions, which were assumed to be an acceptable estimate of the...
Eutrophication potential of Payette Lake, Idaho
Paul F. Woods
1997, Water-Resources Investigations Report 97-4145
Payette Lake was studied during water years 1995-96 to determine the 20.5-square-kilometer lake's assimilative capacity for nutrients and, thus, its eutrophication potential. The study included quantification of hydrologic and nutrient budgets, characterization of water quality in the limnetic and littoral zones, development of an empirical nutrient load/lake response model, and...
Application of the Bridge Stream Tube Model for Alluvial River Simulations (BRI-STARS) at bridge 101-17-5096A, State Road 101; over the St. Joseph River at Saint Joe, Indiana
D. C. Voelker
1997, Water-Resources Investigations Report 97-4137
No abstract available....
Rhodhiss Lake, North Carolina: Analysis of ambient conditions and simulation of hydrodynamics, constituent transport, and water-quality characteristics, 1993-94
M. J. Giorgino, J. D. Bales
1997, Water-Resources Investigations Report 97-4131
From January 1993 through March 1994, the U.S. Geological Survey conducted an investigation of Rhodhiss Lake in cooperation with the Western Piedmont Council of Governments. Objectives of the investigation were to describe ambient hydrologic and water-quality conditions, to estimate loadings of nutrients and suspended solids from selected tributaries and point...
Modified level II streambed-scour analysis for structure I-64-11-5202 crossing Flat Run Ditch in Posey County, Indiana
J.T. Wilson, B.A. Robinson, D. C. Voelker, R. L. Miller
1997, Open-File Report 97-332
Modified level II streambed-scour analysis for structure (I-469)-24-02-6953 crossing Harber Ditch in Allen County, Indiana
J.T. Wilson, B.A. Robinson, D. C. Voelker, R. L. Miller
1997, Open-File Report 97-336
Modified level II streambed-scour analysis for structure I-164-10-6971 crossing Pigeon Creek in Vanderburgh County, Indiana
J.T. Wilson, B.A. Robinson, D. C. Voelker, R. L. Miller
1997, Open-File Report 97-335
