Pesticides in ground water: distribution, trends, and governing factors
Jack Barbash, Elizabeth A. Resek
1997, Book
A comprehensive review of published information on the distribution and behavior of pesticides and their transformation products in ground water indicates that pesticides from every chemical class have been detected in ground waters of the United States. Many of these compounds are commonly present at low concentrations in ground water...
Early vegetational changes on a forested wetland constructed for mitigation
Matthew C. Perry, P.C. Osenton, C.B. Sibrel
1997, Wetland Journal (9) 17-20
Changes in vegetation were studied on 15 acres of a 35 acre forested wetland created as a mitigation site in Anne Arundel County, Maryland during 1994-96. Meter-square sampling on four different hydrologic elevations determined that grasses initially dominated the area, but decreased from 59 percent in 1994 to 51...
Development of an IBI-based assessment of depressional wetlands in Maryland and Delaware
D. W. Sparling, Michael Keller, T. P. Lowe, M. Perry, B. Teels, L. Brown, L. Mazanti, N. Melvin
1997, Book chapter, The Future of Wetland Assessment: Applying science through the hydrogeomorphic assessment approach and other approaches. Abstracts of a meeting held March 10-13, 1997, Parole, Maryland.
The hydrogeomorphic approach (HGM) of wetland assessment emphasizes functional components of wetlands such as water storage, transformation and cycling of elements, accumulation of sediments, and preservation of habitats. Many of the elements measured in HGM are physical rather than ecological or biological. The HGM approach, therefore, provides information on...
Optimal management strategies for biodiversity within a powerline right-of-way
Matthew C. Perry, P.C. Osenton, F.W. Fallon, J.E. Fallon
James R.= Williams, John W. Goodrich-Mahoney, Jan R. Wisniewski, Joe Wisniewski, editor(s)
1997, Book chapter, Sixth International Symposium on Environmental Concerns in Right-of-Way Management: 24-26 February 1997, New Orleans, Louisiana
Management techniques used to control vegetation along a new 8.5 km- (5.3 mile) long powerline right-of-way located at Patuxent Research Refuge are being evaluated to identify changes in habitat that affect wildlife. Techniques include: complete mow, strip mow, low volume foliar spray, selective basal spray, and tree topping....
Hydrogeology and ground-water flow in the Edwards-Trinity aquifer-system, west-central, Texas
Eve L. Kuniansky, Ann F. Ardis
1997, Professional Paper 1421-C
Two finite-element ground-water flow models were developed for the Edwards–Trinity aquifer system, west-central Texas, to gain a better understanding of the flow system; one ground-water flow model was developed at a large scale to simulate the regional system and contiguous, hydraulically connected units, and one model was constructed at a...
Advective-transport observation (ADV) package, a computer program for adding advective-transport observations of steady-state flow fields to the three-dimensional ground-water-flow parameter-estimation model MODFLOWP
Evan R. Anderman, Mary Catherine Hill
1997, Open-File Report 97-14
No abstract available....
Selected hydrologic features of the Lake Tahoe Basin, California and Nevada
Timothy G. Rowe, J. Christopher Stone
1997, Open-File Report 97-384
Hydrogeologic and water-quality data used to evaluate the effects of focused recharge on ground-water quality near Princeton, Minnesota, 1991-95
G. N. Delin, M.K. Landon, K.J. Nelson, R. B. Wanty, R. W. Healy, H.W. Olson, J.K. Böhlke, B. R. Schroyer, P. D. Capel
1997, Open-File Report 97-21
This study was part of the Management Systems Evaluation Area (MSEA) Program, a multi-scale, inter-agency initiative to evaluate the effects of agricultural systems on water quality in the midwest corn belt. The research was part of the U.S. Geological Survey Toxics Substances Hydrology Program. The research area was located in...
Using remote sensing to monitor global change
Elijah W. Ramsey III
1997, Fact Sheet 096-97
To properly respond to natural and human-induced stresses to wetlands, resource managers must consider their functions and values. Remote sensing is an important tool for monitoring wetland responses to changes in the hydrologic regime and water quality caused by global climate change and sea-level rise....
Pesticides in surface water of the Mid-Atlantic region
Matthew J. Ferrari, Scott W. Ator, Joel D. Blomquist, Joel E. Dysart
1997, Water-Resources Investigations Report 97-4280
Water-quality data from 463 surface-water sites were compiled and analyzed to document the occurrence and distribution of pesticides in surface water of the Mid-Atlantic region as part of the Mid-Atlantic Integrated Assessment program of the U.S. Environmental Protection Agency. Those data collected by the U.S. Geological Survey from October 1973...
Documentation of AIR2D, a computer program to simulate two-dimensional axisymmetric air flow in the unsaturated zone
C.J. Joss, A. L. Baehr
1997, Open-File Report 97-588
No abstract available....
Characterization of springflow in the north coast limestone of Puerto Rico using physical, chemical, and stable isotopic methods
Jesús Rodríguez-Martínez
1997, Water-Resources Investigations Report 97-4122
The carbonate sequence of middle Tertiary age of the north coast of Puerto Rico is characterized by the presence of numerous springs in the coastal areas. In order to advance the understanding of the hydrologic role of the springs in the north coast limestone aquifer system of Puerto Rico, a...
Ground water atlas of the United States: Segment 13, Alaska, Hawaii, Puerto Rico, and the U.S. Virgin Islands
James A. Miller, R.L. Whitehead, Delwyn S. Oki, Stephen B. Gingerich, Perry G. Olcott
1997, Hydrologic Atlas 730-N
No abstract available....
Ground-water flow and contaminant transport at a radioactive-materials processing site, Wood River Junction, Rhode Island
Barbara J. Ryan, Kenneth L. Kipp
1997, Professional Paper 1571
Liquid wastes from an enriched-uranium cold-scrap recovery plant at Wood River Junction, Rhode Island, were discharged to the environment through evaporation ponds and trenches from 1966 through 1980. Leakage from the ponds and trenches resulted in a plume of contaminated ground water extending northwestward to the Pawcatuck River through a...
Hydrologic budgets of regional aquifer systems of the United States for predevelopment and development conditions
Richard H. Johnston
1997, Professional Paper 1425
Ground-water budgets are presented in this report for 14 regionally extensive aquifer systems; pumpage from 11 of these systems provided from 40 to 50 percent of the ground water withdrawn in the United States during the 1970's and 1980's. The budgets are based on simulation results from computer-based models developed...
Hydrologic and water-quality data related to the occurrence of arsenic for areas along the Madison and Upper Missouri Rivers, southwestern and west-central Montana
L.K. Tuck, D.M. Dutton, D. A. Nimick
1997, Open-File Report 97-203
Geothermal waters in Yellowstone National Park contribute large quantities of arsenic to the headwaters of the Madison River. Water in some Quaternary and Tertiary valley-fill deposits along the Madison and upper Missouri Rivers also is locally enriched in arsenic. Arsenic in surface and ground water in these...
Hydrology of the shallow aquifer and uppermost semiconfined aquifer near El Paso, Texas
D. E. White, E. T. Baker Jr., Roger Sperka
1997, Water-Resources Investigations Report 97-4263
The availability of fresh ground water in El Paso and adjacent areas that is needed to meet increased demand for water supply concerns local, State, and Federal agencies. The Hueco bolson is the principal aquifer in the El Paso area. Starting in the early 1900s and continuing to the 1950s,...
Sub-crop geologic map of pre-Tertiary rocks in the Yucca Flat and northern Frenchman Flat areas, Nevada Test Site, southern Nevada
J. C. Cole, Anita G. Harris, Ronald R. Wahl
1997, Open-File Report 97-678
This map displays interpreted structural and stratigraphic relations among the Paleozoic and older rocks of the Nevada Test Site region beneath the Miocene volcanic rocks and younger alluvium in the Yucca Flat and northern Frenchman Flat basins. These interpretations are based on a comprehensive examination and review of data for...
Guide to the revised heat and solute transport simulator; HST3D, Version 2
K.L. Kipp Jr.
1997, Water-Resources Investigations Report 97-4157
No abstract available....
Documentation of R-UNSAT, a computer model for the simulation of reactive, multispecies transport in the unsaturated zone
Matthew A. Lahvis, Arthur L. Baehr
1997, Open-File Report 97-630
No abstract available....
Hydrologic, sedimentologic, and chemical data describing surficial bed sediments in the navigation pools of the upper Mississippi River, after the flood of 1993
John A. Moody, editor(s)
1997, Open-File Report 96-580
Hydrologic, sedimentologic, and chemical data describing surficial bed sediments and water in the navigation pools of the Upper Mississippi River, July 1991-April 1992
John A. Moody, editor(s)
1997, Open-File Report 95-708
Urbanization and recharge in the vicinity of East Meadow Brook, Nassau County, New York: Part 2 — Effect of urban runoff on the hydrology of the headwaters of East Meadow Brook, 1989-90
Frederick Stumm, Henry F. H. Ku
1997, Water-Resources Investigations Report 97-4063
No abstract available....
Model-estimated ground-water recharge and hydrograph of ground-water discharge to a stream
A. T. Rutledge
1997, Water-Resources Investigations Report 97-4253
The computer model PULSE, described in this report, can be used to construct a hydrograph of ground-water discharge to a stream. The model is applicable to a ground-water flow system that is driven by areally uniform recharge to the water table, and in which ground water discharges to a gaining...
Environmental setting and implications for water quality in the Western Lake Michigan Drainages
C.A. Peters, editor(s)
1997, Water-Resources Investigations Report 97-4196
In 1991, the U.S. Geological Survey began to implement its National Water-Quality Assessment (NAWQA) program. The Western Lake Michigan Drainages was one of 20 study units selected for investigation to begin in 1991. The study-unit investigation will include an assessment of surface- and ground-water quality. The quality of water in...
