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...
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...
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...
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...
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...
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...
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
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...
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...
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...
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....
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...
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...
Estimating areas contributing recharge to wells, lessons from previous studies
O. Lehn Franke, T. E. Reilly, D.W. Pollock, J. W. LaBaugh
1998, Circular 1174
Factors relating to the estimation of areas contributing recharge to wells, such as complexity of the ground-water flow system, effects of changing hydrologic conditions, and effects of well-screen locations and pumping rates, are reviewed. The point of view that simulation is the best means to obtain physically based estimates of...
Low-flow water-quality characterization of the Gore Creek watershed, upper Colorado River basin, Colorado, August 1996
Kirby H. Wynn, Norman E. Spahr
1998, Fact Sheet 160-97
The Upper Colorado River Basin (UCOL) is one of 59 National Water-Quality Assessment (NAWQA) study units designed to assess the status and trends of the Nation?s water quality (Leahy and others, 1990). The UCOL study unit began operation in 1994, and surface-water-quality data collection at a network of 14 sites...
USGS Mineral Resources Program: International Activities
S.J. Kropschot
1998, Fact Sheet 011-98
The USGS is the country's leading earth science organization. Since 1879, USGS scientists have gathered and analyzed data and disseminated the results of their research on the geology, cartography, hydrology, and, more recently biology, of every continent and ocean on Earth. Multidisciplinary research both in the United States and in...
Anaerobic oxidation of [1,2-14C]Dichloroethene under Mn(IV)-reducing conditions
Paul M. Bradley, James Landmeyer, Richard S. Dinicola
1998, Applied and Environmental Microbiology (64) 1560-1562
Anaerobic oxidation of [1,2-14C]dichloroethene to14CO2 under Mn(IV)-reducing conditions was demonstrated. The results indicate that oxidative degradation of partially chlorinated solvents like dichloroethene can be significant even under anoxic conditions and demonstrate the potential importance of Mn(IV) reduction for remediation of chlorinated groundwater contaminants....
Intercomparison of principal hydrometric instruments; Third phase, Evaluation of ultrasonic velocity meters for flow measurement in streams, canals, and estuaries
Charles S. Melching, Michael W. Meno
1998, Report, WMO/TD
As part of the World Meteorological Organization (WMO) project Intercomparison of Principal Hydrometric Instruments, Third Phase, a questionnaire was prepared by the U.S. Geological Survey (USGS) on the application of Ultrasonic Velocity Meters (UVM's) for flowmeasurement in <span...
Effects of reservoir hydrology on reproduction by largemouth bass and spotted bass in Normandy Reservoir, Tennessee
Steven M. Sammons, L.G. Dorsey, Phillip William Bettoli, F.C. Fiss
1998, North American Journal of Fisheries Management (19) 78-88
Age-0 largemouth bass Micropterus salmoides and spotted bass M. punctulatus were collected from Normandy Reservoir, Tennessee, 1992–1996, to evaluate effects of reservoir hydrology and hatching of shad Dorosoma spp. on hatching and first-year growth and survival of these two species. Fish were collected in cove rotenone samples in early Aug...
Geographic trend in mercury measured in common loon feathers and blood
Joseph D. Kaplan, Michael W. Meyer, Peter S. Reaman, W. Emmett Braselton, A. Major, Neil Burgess, Anton M. Scheuhammer
1998, Environmental Toxicology and Chemistry (17) 173-183
The common loon (Gavia immer) is a high‐trophic‐level, long‐lived, obligate piscivore at risk from elevated levels of Hg through biomagnification and bioaccumulation. From 1991 to 1996 feather (n = 455) and blood (n = 381) samples from adult loons were collected between June and September in five regions of North America: Alaska,...
Hydrology and snowmelt simulation of Snyderville Basin, Park City, and adjacent areas, Summit County, Utah
Lynette E. Brooks, James L. Mason, David D. Susong
1998, Technical Publication 115
Increasing residential and commercial development is placing increased demands on the ground- and surface-water resources of Snyderville Basin, Park City, and adjacent areas in the southwestern corner of Summit County, Utah. Data collected during 1993-95 were used to assess the quantity and quality of the water resources in the study...
