Simulated peak flows and water-surface profiles for Scott Creek near Sylva, North Carolina
B.F. Pope
1996, Water-Resources Investigations Report 96-4226
Peak flows were simulated for Scott Creek, just upstream from Sylva, in Jackson County, North Carolina, in order to provide Jackson County officials with information that can be used to improve preparation for and response to flash floods along the reach of Scott Creek that flows through Sylva. A U.S....
Ground-water quality in the western part of the Cambrian-Ordovician aquifer in the Western Lake Michigan Drainages, Wisconsin and Michigan
D. A. Saad
1996, Water-Resources Investigations Report 96-4231
Ground-water samples were collected during the summer of 1995 from 29 wells in the western part of the Cambrian-Ordovician aquifer in the Western Lake Michigan Drainages study unit of the National-Water Quality Assessment Program. Analyses of ground-water samples from these wells were used to provide an indication of waterquality conditions...
Evapotranspiration from successional vegetation in a deforested area of the Lake Wales Ridge, Florida
D. M. Sumner
1996, Water-Resources Investigations Report 96-4244
The suitability of three evapotranspiration models (Penman-Monteith, Penman, and a modified Priestley-Taylor) was evaluated at a site of successional vegetation in a deforested area of the Lake Wales Ridge, Florida. Eddy correlation measurements of evapotranspiration made during 22 approximately 1-day periods at a temporal resolution of 20 minutes from September...
A three-dimensional method-of-characteristics solute-transport model (MOC3D)
Leonard F. Konikow, D.J. Goode, G.Z. Hornberger
1996, Water-Resources Investigations Report 96-4267
This report presents a model, MOC3D, that simulates three-dimensional solute transport in flowing ground water. The model computes changes in concentration of a single dissolved chemical constituent over time that are caused by advective transport, hydrodynamic dispersion (including both mechanical dispersion and diffusion), mixing (or dilution) from fluid sources, and...
Estimation of the recharge areas contributing water to the South Well Field, Columbus, Ohio
C. W. Schalk
1996, Water-Resources Investigations Report 96-4039
The city of Columbus, Ohio, operates four radial collector wells, designed to yield 42 Mgal/d (million gallons per day), in southern Franklin County, Ohio, as part of their municipal supply of water. The collector wells are adjacent to, and designed to induce infiltration from, Big Walnut Creek and Scioto River....
Ground-water hydrology, historical water use, and simulated ground-water flow in Cretaceous-age Coastal Plain aquifers near Charleston and Florence, South Carolina
B. G. Campbell, Marijke van Heeswijk
1996, Water-Resources Investigations Report 96-4050
A quasi-three-dimensional, transient, digital, ground-water flow model representing the Coastal Plain aquifers of South Carolina, has been constructed to assist in defining the ground- water-flow system of Cretaceous aquifers near Charleston and Florence, S.C. Both cities are near the centers of large (greater than 150 feet) potentiometric declines in the...
Hydrogeology and simulation of ground-water flow, Picatinny Arsenal and vicinity, Morris County, New Jersey
L. M. Voronin, D.E. Rice
1996, Water-Resources Investigations Report 96-4061
Ground-water flow in glacial sediments and bedrock at Picatinny Arsenal, N.J., was simulated by use of a three-dimensional finite-difference ground- water-flow model. The modeled area includes a 4.3-square-mile area that extends from Picatinny Lake to the Rockaway River. Most of the study area is bounded by the natural hydrologic boundaries...
Programmer's documentation for MODFLOW-96, an update to the U.S. Geological Survey modular finite-difference ground-water flow model
A.W. Harbaugh, M.G. McDonald
1996, Open-File Report 96-486
User's documentation for MODFLOW-96, an update to the U.S. Geological Survey modular finite-difference ground-water flow model
A.W. Harbaugh, M.G. McDonald
1996, Open-File Report 96-485
A modified index for assessment of potential scour at bridges over waterways
Edward J. Doheny
1996, Open-File Report 96-554
The modified potential-scour index described in this report is based on a potential-scour index used by the U.S. Geological Survey Maryland District (Maryland index), and a prototype index developed by the U.S. Geological Survey Tennessee District (Tennessee index). The modifications were made to (1) improve...
Procedures for adjusting regional regression models of urban-runoff quality using local data
Anne B. Hoos, Joy S. Lizarraga
1996, Water Supply Paper 2428
Statistical operations termed model-adjustment procedures can be used to incorporate local data into existing regression modes to improve the predication of urban-runoff quality. Each procedure is a form of regression analysis in which the local data base is used as a calibration data set; the resulting adjusted regression models can...
Ground-water resources of the lower Apalachicola-Chattahoochee-Flint River basin in parts of Alabama, Florida, and Georgia — Subarea 4 of the Apalachicola-Chattahoochee-Flint and Alabama-Coosa-Tallapoosa River basins
Lynn J. Torak, Robin John McDowell
1996, Open-File Report 95-321
The study area is underlain by Coastal Plain sediments of pre-Cretaceous to Quaternary age consisting of alternating units of sand, clay, sandstone, dolomite, and limestone that gradually thicken and dip gently to the southeast. The Upper Floridan aquifer is composed of an off lapping sequence of clastic and carbonate sediments...
Simulated three-dimensional ground-water flow in the Lockport Group, a fractured-dolomite aquifer near Niagara Falls, New York
Richard M. Yager
1996, Water Supply Paper 2487
A three-dimensional model was developed through a parameter-estimation method based on nonlinear regression to simulate ground-water flow in the Lockport Group, a fractured dolomite aquifer near Niagara Falls, N.Y. Horizontal fracture zones within the Lockport Group were represented by model layers, and connections between the zones were represented by vertical...
Summary of the Oahu, Hawaii, regional aquifer-system analysis
William D. Nichols, Patricia J. Shade, Charles D. Hunt Jr.
1996, Professional Paper 1412-A
Oahu, the third largest of the Hawaiian islands, is formed by the eroded remnants of two elongated shield volcanoes with broad, low profiles. Weathering and erosion have modified the original domed surfaces of the volcanoes, leaving a landscape of deep valleys and steep interfluvial ridges in the interior highlands. The...
Descriptions of anisotropy and heterogeneity and their effect on ground-water flow and areas of contribution to public supply wells in a karst carbonate aquifer system
Lari A. Knochenmus, James L. Robinson
1996, Water Supply Paper 2475
MODFLOW and MODPATH numerical models were used to generate areas of contribution to public supply wells for simulated hypothetical anisotropy and heterogeneous carbonate aquifer systems. The simulations incorporated, to varying degrees, the anisotropy and heterogeneity observed in a karst carbonate aquifer system. These include: isotropic and homogeneous single-layer system, doubly-porous...
Water Budget and the Effects of Land-Use Changes on Ground-Water Recharge, Oahu, Hawaii
Patricia J. Shade, William D. Nichols
1996, Professional Paper 1412-C
Detailed water budgets calculated for southern and southeastern Oahu are used with a geographic information system to develop simplified methods for estimating areal water budgets for predevelopment and mid-1980's land use. The methods were applied to estimate water budgets for the Waianae area of western Oahu, and for north-central, southern,...
Ocean trenches; a computer animation and paper model
T. R. Alpha, J. P. Galloway
1996, Open-File Report 96-76-B
Data base for a national mineral-resource assessment of undiscovered deposits of gold, silver, copper, lead, and zinc in the conterminous United States
S. D. Ludington, D. P. Cox, R.B. McCammon
1996, Open-File Report 96-96
For this assessment, the conterminous United States was divided into 12 regions Adirondack Mountains, Central and Southern Rocky Mountains, Colorado Plateau, East Central, Great Basin, Great Plains, Lake Superior, Northern Appalachians, Northern Rocky Mountains, Pacific Coast, Southern Appalachians, and Southern Basin and Range. The assessment, which was conducted by regional...
Factors affecting phosphorus transport at a conventionally-farmed site in Lancaster County, Pennsylvania, 1992-95
Daniel G. Galeone
1996, Water-Resources Investigations Report 96-4168
The U.S. Geological Survey and the Bureau of Land and Water Conservation of the Pennsylvania Department of Environmental Protection conducted a cooperative study to determine the effects of manure application and antecedent soil-phosphorus concentrations on the transport of phosphorus from the soil of a typical farm site in Lancaster County,...
Simulation of water level, streamflow, and mass transport for the Cooper and Wando rivers near Charleston, South Carolina, 1992-95
P.A. Conrads, P.A. Smith
1996, Water-Resources Investigations Report 96-4237
The one-dimensional, unsteady-flow model, BRANCH, and the Branched Lagrangian Transport Model (BLTM) were calibrated and validated for the Cooper and Wando Rivers near Charleston, South Carolina. Data used to calibrate the BRANCH model included water-level data at four locations on the Cooper River and two locations on the Wando River,...
Variation in the relation of rainfall to runoff from residential lawns in Madison, Wisconsin, July and August 1995
A.D. Legg, R.T. Bannerman, John Panuska
1996, Water-Resources Investigations Report 96-4194
The quality of runoff from residential lawns is a concern for municipal stormwater management programs. Land-use based computer models are increasingly being used to assess the impact of lawn runoff on urban watersheds. To accurately model the runoff for residential lawns, the variation in the relation of rainfall to runoff...
Evaluation and modification of five techniques for estimating stormwater runoff for watersheds in west-central Florida
J.T. Trommer, J.E. Loper, K.M. Hammett
1996, Water-Resources Investigations Report 96-4158
Several traditional techniques have been used for estimating stormwater runoff from ungaged watersheds. Applying these techniques to water- sheds in west-central Florida requires that some of the empirical relationships be extrapolated beyond tested ranges. As a result, there is uncertainty as to the accuracy of these estimates. Sixty-six storms occurring...
Effects of pumping municipal wells at Junction City, Kansas, on streamflow in the Republican River, Northeast Kansas, 1992-94
N. C. Myers, Xiaodong Jian, G.D. Hargadine
1996, Water-Resources Investigations Report 96-4130
A digital ground-water flow model was developed to simulate steady-state and transient effects of municipal well pumping from an alluvial aquifer on streamflow in the Republican River near Junction City, Kansas. Seepage survey results indicated that streamflow loss in the vicinity of the municipal well field ranged from 1 to...
Assessment of the fresh- and brackish-water resources underlying Dunedin and adjacent areas of northern Pinellas County, Florida
L. A. Knochenmus, E. S. Swenson
1996, Water-Resources Investigations Report 96-4164
The city of Dunedin is enhancing their potable ground-water resources through desalination of brackish ground water. An assessment of the fresh- and brackish-water resources in the Upper Floridan aquifer was needed to estimate the changes that may result from brackish-water development. The complex hydrogeologic framework underlying Dunedin and adjacent areas...
Documentation of computer program VS2Dh for simulation of energy transport in variably saturated porous media: Modification of the US Geological Survey's computer program VS2DT
R. W. Healy, A.D. Ronan
1996, Water-Resources Investigations Report 96-4230
No abstract available....
