Water flow through temperate glaciers
A. G. Fountain, Joseph S. Walder
1998, Reviews of Geophysics (36) 299-328
Understanding water movement through a glacier is fundamental to several critical issues in glaciology, including glacier dynamics, glacier-induced floods, and the prediction of runoff from glacierized drainage basins. to this end we have synthesized a conceptual model os water movement through a temperate glacier from the surface to the outlet...
Assessing simulated ecosystem processes for climate variability research at Glacier National Park, USA
Joseph D. White, Steven W. Running, Peter E. Thornton, Robert E. Keane, Kevin C. Ryan, Daniel B. Fagre, Carl H. Key
1998, Ecological Applications (8) 805-823
Glacier National Park served as a test site for ecosystem analyses that involved a suite of integrated models embedded within a geographic information system. The goal of the exercise was to provide managers with maps that could illustrate probable shifts in vegetation, net primary production (NPP), and hydrologic responses associated...
Technical protocol for evaluating natural attenuation of chlorinated solvents in ground water
T.H. Wiedemeier, M.A. Swanson, D.E. Moutoux, E.K. Gordon, J.T. Wilson, B.H. Wilson, D.H. Kampbell, P.E. Haas, R.N. Miller, J.E. Hansen, Francis H. Chapelle
1998, Report
This Protocol is designed to evaluate the fate in ground water of chlorinated aliphatic hydrocarbons and/or fuel hydrocarbons. Documentation of natural attenuation requires detailed site characterization. The data collected under this protocol can be used to compare the relative effectiveness of other remedial options. and natural attenuation. This protocol should...
Natural attenuation of chlorinated-hydrocarbon contamination at Fort Wainwright, Alaska: A hydrogeochemical and microbiological investigation workplan
Kathleen A. McCarthy, Michael R. Lilly, Joan F. Braddock, Larry D. Hinzman
1998, Open-File Report 98-198
Natural attenuation processes include biological degradation, by which microorganisms break down contaminants into simpler product compounds; adsorption of contaminants to soil particles, which decreases the mass of contaminants dissolved in ground water; and dispersion, which decreases dissolved contaminant concentrations through dilution. The primary objectives of this study are to (1)...
Chemical and mineralogical characteristics and acid-neutralizing potential of fresh and altered rocks and soils of the Boulder River headwaters in Basin and Cataract Creeks of northern Jefferson County, Montana
George A. Desborough, Paul H. Briggs, Nilah Mazza
1998, Open-File Report 98-40
No abstract available....
Ground water and surface water: A single resource
Thomas C. Winter, Judson W. Harvey, O. Lehn Franke, William M. Alley
1998, Circular 1139
The importance of considering ground water and surface water as a single resource has become increasingly evident. Issues related to water supply, water quality, and degradation of aquatic environments are reported on frequently. The interaction of ground water and surface water has been shown to be a significant concern in...
Status of ground-water resources at U.S. Navy Support Facility, Diego Garcia; summary of hydrologic and climatic data, January 1995 through September 1997
J.D. Torikai
1998, Open-File Report 98-1
Nitrogen excess in North American ecosystems: Predisposing factors, ecosystem responses, and management strategies
Mark E. Fenn, M. A. Poth, J. D. Aber, Jill Baron, Bernard T. Bormann, Dale W. Johnson, A. Dennis Lemly, Steven G. McNulty, D.F. Ryan, Robert Stottlemyer
1998, Ecological Applications (8) 706-733
Most forests in North America remain nitrogen limited, although recent studies have identified forested areas that exhibit symptoms of N excess, analogous to overfertilization of arable land. Nitrogen excess in watersheds is detrimental because of disruptions in plant/soil nutrient relations, increased soil acidification and aluminum mobility, increased emissions of nitrogenous...
Ground-water hydrology and simulation of ground-water flow at Operable Unit 3 and surrounding region, U.S. Naval Air Station, Jacksonville, Florida
J.H. Davis
1998, Open-File Report 98-68
The Naval Air Station, Jacksonville (herein referred to as the Station), occupies 3,800 acres adjacent to the St. Johns River in Duval County, Florida. Operable Unit 3 (OU3) occupies 134 acres on the eastern side of the Station and has been used for industrial and commercial purposes since World War...
Tracing nitrogen sources and cycling in catchments
Carol Kendall
1998, Book chapter, Isotope tracers in catchment hydrology
This chapter focuses on the uses of isotopes to understand water chemistry.I Isotopic compositions generally cannot be interpreted successfully in the absence of other chemical and hydrologic data. The chapter focusses on uses of isotopes in tracing sources and cycling of nitrogen in the water-component of forested catchment, and on...
Tracing of weathering reactions and water flowpaths: A multi-isotope approach
Tomas D. Bullen, Carol Kendall
1998, Book chapter, Isotope tracers in catchment hydrology
This chapter discusses the importance of using isotopes in a complementary manner, primarily to constrain and enrich models developed from hydrologic and chemical data. Isotopes are viewed as tools for testing rather than developing hypotheses, particularly in studies operating under tight budgetary constraints. Water isotopes are very useful tools for...
A strategy for assessing potential future changes in climate, hydrology, and vegetation in the Western United States
Robert Stephen Thompson, Steven W. Hostetler, Patrick J. Bartlein, Katherine H. Anderson
1998, Circular 1153
Historical and geological data indicate that significant changes can occur in the Earth's climate on time scales ranging from years to millennia. In addition to natural climatic change, climatic changes may occur in the near future due to increased concentrations of carbon dioxide and other trace gases in the atmosphere...
Hydrology and geochemistry of a slag-affected aquifer and chemical characteristics of slag-affected ground water, northwestern Indiana and northeastern Illinois
E. Randall Bayless, Theodore K. Greeman, C.C. Harvey
1998, Water-Resources Investigations Report 97-4198
Slag is a by-product of steel manufacturing and a ubiquitous fill material in northwestern Indiana. Ground water associated with slag deposits generally is characterized by high pH and elevated concentrations of many inorganic water-quality constituents. The U.S. Geological Survey, in cooperation with the Indiana Department of Environmental Management, conducted a...
Assessment of the hydraulic connection between ground water and the Peace River, west-central Florida
B. R. Lewelling, A. B. Tihansky, J. L. Kindinger
1998, Water-Resources Investigations Report 97-4211
The hydraulic connection between the Peace River and the underlying aquifers along the length of the Peace River from Bartow to Arcadia was assessed to evaluate flow exchanges between these hydrologic systems. Methods included an evaluation of hydrologic and geologic records and seismic-reflection profiles, seepage investigations, and thermal infrared imagery...
Characterization of hydrogeologic units using matrix properties, Yucca Mountain, Nevada
L. E. Flint
1998, Water-Resources Investigations Report 97-4243
Determination of the suitability of Yucca Mountain, in southern Nevada, as a geologic repository for high-level radioactive waste requires the use of numerical flow and transport models. Input for these models includes parameters that describe hydrologic properties and the initial and boundary conditions for all rock materials within the unsaturated...
Inferences for Yucca Mountain unsaturated-zone hydrology from secondary minerals
James B. Paces, Leonid A. Neymark, Brian D. Marshall, J. F. Whelan, Zell E. Peterman
1998, Conference Paper, High-level radioactive waste management: Proceedings of the eighth international conference
No abstract available....
Hydrology of Central Florida Lakes - A Primer
Donna M. Schiffer
1998, Circular 1137
INTRODUCTION Lakes are among the most valued natural resources of central Florida. The landscape of central Florida is riddled with lakeswhen viewed from the air, it almost seems there is more water than land. Florida has more naturally formed lakes than other southeastern States, where many lakes are created by building...
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...
Surface-water quality data, Permanente and Saratoga Creeks, Santa Clara Valley, California, water year 1997
S.H. Myhre, K.E. Bencala
1998, Open-File Report 98-4
No abstract available....
Ground-water hydrology and simulated effects of development in the Milford area, an arid basin in southwestern Utah
James L. Mason
1998, Professional Paper 1409-G
A three-dimensional, finite-difference model was constructed to simulate ground-water flow in the Milford area. The purpose of the study was to evaluate present knowledge and concepts of the groundwater system, to analyze the ability of the model to represent past and current (1984) conditions, and to estimate the effects of...
A preliminary gravity survey of the Kailua-Kona area, Hawaii, for delineation of a hydrologic boundary
J. P. Kauahikaua, Ka’eo Duarte, James Foster
1998, Open-File Report 98-110
Field methods for measurement of fluvial sediment
Thomas K. Edwards, G. Douglas Glysson
1998, Techniques of Water-Resources Investigations 03-C2
The complexity of hydrologic and physical environments and man's ever-increasing data needs make it essential for those who collect sediment data to be aware of basic concepts involved in the processes of erosion, transport, and deposition of sediment, and of the equipment and procedures necessary to representatively sample sediment and...
Tritium in unsaturated zone gases and air at the Amargosa Desert Research Site, and in spring and river water, near Beatty, Nevada, May 1997
Robert G. Striegl, Richard W. Healy, Robert L. Michel, David E. Prudic
1998, Open-File Report 97-778
Elevated tritium concentrations in the unsaturated zone at the Amargosa Desert Research Site (ADRS), immediately south and west of the low-level radioactive-waste burial site south of Beatty, Nevada, have stimulated research of processes that control the transport of tritium in arid unsaturated zones. In May 1997, 58 samples were collected...
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...
Long-term hydrologic effects on marsh plant community structure in the southern Everglades
David E. Busch, W.F. Loftus, O. L. Bass Jr.
1998, Wetlands (18) 230-241
Although large-scale transformation of Everglades landscapes has occurred during the past century, the patterns of association among hydrologic factors and southern Everglades freshwater marsh vegetation have not been well-defined. We used a 10-year data base on the aquatic biota of Shark Slough to classify vegetation and describe...
