Level I water-quality inventory and monitoring, Richmond National Battlefield Park, Virginia
Roger M. Moberg, Karen C. Rice
2002, Report
The U.S. Geological Survey conducted a Level I Water-Quality Inventory and Monitoring (WAQIM) data-collection effort for Richmond National Battlefield Park (Richmond NBP) from August 2001 through April 2002. The primary objective of the WAQIM program was to provide the National Park Service (NPS) and Richmond NBP with at least a...
An ancient duality
Karen C. Rice
2002, People, Land, and Water (9) 29-29
No abstract available....
Annual primary production: Patterns and mechanisms of change in a nutrient-rich tidal ecosystem
Alan D. Jassby, James E. Cloern, B.E. Cole
2002, Limnology and Oceanography (47) 698-712
Although nutrient supply often underlies long-term changes in aquatic primary production, other regulatory processes can be important. The Sacramento-San Joaquin River Delta, a complex of tidal waterways forming the landward portion of the San Francisco Estuary, has ample nutrient supplies, enabling us to examine alternate regulatory mechanisms over...
Potential effects of global warming on the Sacramento/San Joaquin watershed and the San Francisco estuary
Noah Knowles, Daniel R. Cayan
2002, Geophysical Research Letters (29) 38-1-38-4
California's primary hydrologic system, the San Francisco estuary and its upstream watershed, is vulnerable to the regional hydrologic consequences of projected global climate change. Projected temperature anomalies from a global climate model are used to drive a combined model of watershed hydrology and estuarine dynamics. By 2090, a projected temperature...
Hydrologic processes and nutrient dynamics in a pristine mountain catchment
F. Richard Hauer, Daniel B. Fagre, Jack A. Stanford
2002, Verhandlungen der Internationalen Vereinigung fur Theoretische und Angewandte Limnologie (28) 1490-1493
Nutrient dynamics in watersheds have been used as an ecosystem-level indicator of overall ecosystem function or response to disturbance (e.g. Borman.N et al. 1974, WEBSTER et al. 1992). The examination of nutrients has been evaluated to determine responses to logging practices or other changes in watershed land use. Nutrient dynamics...
Mercury loading and methylmercury production and cycling in high-altitude lakes from the Western United States
David P. Krabbenhoft, Mark L. Olson, John F. DeWild, David W. Clow, Robert G. Striegl, Mark M. Dornblaser, Peter C. Van Metre
2002, Water, Air, and Soil Pollution: Focus (2) 233-249
Studies worldwide have shown that mercury (Hg) is a ubiquitous contaminant, reaching even the most remote environments such as high-altitude lakes via atmospheric pathways. However, very few studies have been conducted to assess Hg contamination levels of these systems. We sampled 90 mid-latitude, high-altitude lakes from seven national parks in...
Mercury on the move during snowmelt in Vermont
James B. Shanley, P. F. Schuster, M.M. Reddy, D.A. Roth, Howard E. Taylor, G. Aiken
2002, Eos, Transactions, American Geophysical Union (83) 45-48
Although mercury (Hg) emissions peaked in the United States over the last 20 to 40 years and are now declining, they remain well above natural background levels in soils and sediments. Only a small fraction of the Hg deposited from the atmosphere to the terrestrial landscape runs off in streamflow....
Improving a regional model using reduced complexity and parameter estimation
Victor A. Kelson, Randall J. Hunt, Henk M. Haitjema
2002, Groundwater (40) 132-143
The availability of powerful desktop computers and graphical user interfaces for ground water flow models makes possible the construction of ever more complex models. A proposed copper-zinc sulfide mine in northern Wisconsin offers a unique case in which the same hydrologic system has been modeled using a variety of...
Final report: Initial ecosystem response of salt marshes to ditch plugging and pool creation: Experiments at Rachel Carson National Wildlife Refuge (Maine)
S.C. Adamowicz, C. T. Roman
2002, Book
This study evaluates the response of three salt marshes, associated with the Rachel Carson National Wildlife Refuge (Maine), to the practice of ditch plugging. Drainage ditches, originally dug to drain the marsh for mosquito control or to facilitate salt hay farming, are plugged with marsh peat in an effort...
Glacial ice cores reveal a record of natural and anthropogenic atmospheric mercury deposition for the last 270 years
David P. Krabbenhoft, Paul F. Schuster
2002, Fact Sheet 051-02
No abstract available....
Fractured-rock aquifers, understanding an increasingly important source of water
Allen M. Shapiro
2002, Fact Sheet 112-02
Ground water is one of the Nation's most important natural resources. It provides drinking water to communities, supports industry and agriculture, and sustains streams and wetlands. A long record of contributions exists in understanding ground-water movement in sand and gravel aquifers; historically, these aquifers were easily accessible and the first...
Investigation of the geology and hydrology of the Coconino Plateau of northern Arizona: a project of the Arizona Rural Watershed Initiative
Marilyn E. Flynn, Donald J. Bills
2002, Fact Sheet 113-02
The water resources of the Coconino Plateau in northern Arizona are under increasing demand as a result of development. The population of this arid region continues to grow, and the number of visitors to the many national and state parks and monuments in the region has increased annually. The sustainability,...
Northern Everglades, Florida, satellite image map
Jean-Claude Thomas, John W. Jones
2002, IMAP 2756
These satellite image maps are one product of the USGS Land Characteristics from Remote Sensing project, funded through the USGS Place-Based Studies Program with support from the Everglades National Park. The objective of this project is to develop and apply innovative remote sensing and geographic information system techniques to map...
Trends in Streamflow, River Ice, and Snowpack for Coastal River Basins in Maine During the 20th Century
Robert W. Dudley, Glenn A. Hodgkins
2002, Water-Resources Investigations Report 2002-4245
Trends over the 20th Century were examined in streamflow, river ice, and snowpack for coastal river basins in Maine. Trends over time were tested in the timing and magnitude of seasonal river flows, the occurrence and duration of river ice, and changes in snowpack depth, equivalent water content, and density....
Simulation of Ground-Water Flow in the Middle Rio Grande Basin Between Cochiti and San Acacia, New Mexico
Douglas P. McAda, Peggy Barroll
2002, Water-Resources Investigations Report 2002-4200
This report describes a three-dimensional, finite difference, ground-water-flow model of the Santa Fe Group aquifer system within the Middle Rio Grande Basin between Cochiti and San Acacia, New Mexico. The aquifer system is composed of the Santa Fe Group of middle Tertiary to Quaternary age and post-Santa Fe Group valley...
Geologic framework of the regional ground-water flow system in the Upper Deschutes Basin, Oregon
Kenneth E. Lite Jr., Marshall W. Gannett
2002, Water-Resources Investigations Report 2002-4015
Ground water is increasingly relied upon to satisfy the needs of a growing population in the upper Deschutes Basin, Oregon. Hydrogeologic studies are being undertaken to aid in management of the ground-water resource. An understanding of the geologic factors influencing ground-water flow is basic to those investigations. The geology of...
Estimating the magnitude of peak flows at selected recurrence intervals for streams in Idaho
Charles Berenbrock
2002, Water-Resources Investigations Report 2002-4170
Methods for estimating magnitudes of peak flows at various recurrence intervals, needed for highway-structure and water-control design and planning, were developed for gaged and ungaged sites on streams throughout Idaho. Recurrence intervals of 2, 5, 10, 25, 50, 100, 200, and 500 years were selected for analysis of peak flows....
Hydrologic, sediment, and biological data associated with irrigation drainage in the middle Green River basin, Utah and Colorado, water years 1991-2000
Ryan C. Rowland, David V. Allen, Doyle W. Stephens, James W. Yahnke, Nathan L. Darnall, Bruce Waddell
2002, Open-File Report 2002-343
Hydrologic, sediment, and biological data were collected in the middle Green River basin in eastern Utah from 1991 to 2000 in an effort to monitor the effects of irrigation drainage on wetland areas and streams, aid in the development of remediation plans, and evaluate the effectiveness of selenium remediation efforts...
Methods of analysis by the U.S. Geological Survey Organic Geochemistry Research Group: Determination of triazine and phenylurea herbicides and their degradation products in water using solid-phase extraction and liquid chromatography/mass spectrometry
Edward Alan Lee, Alex P. Strahan, Earl Michael Thurman
2002, Open-File Report 2002-436
An analytical method for the determination of 7 triazine and phenylurea herbicides and 12 of their degradation products in natural water samples using solid-phase extraction and liquid chromatography/mass spectrometry is presented in this report. Special consideration was given during the development of the method to prevent the formation of degradation...
Hydrogeologic data for the Coconino Plateau and adjacent areas, Coconino and Yavapai counties, Arizona
Donald J. Bills, Marilyn E. Flynn
2002, Open-File Report 2002-265
Data on geology, topography, hydrology, climate, land use, and vegetation were compiled between October 2000 and September 2001 and assembled into a database for use by local and regional waterresource managers and for future water-resource investigations. The hydrologic data include information on wells, springs, streamflow, water chemistry, and water use....
Assessing ground-water vulnerability to contamination: Providing scientifically defensible information for decision makers
Michael J. Focazio, Thomas E. Reilly, Michael G. Rupert, Dennis R. Helsel
2002, Circular 1224
Throughout the United States increasing demands for safe drinking water and requirements to maintain healthy ecosystems are leading policy makers to ask complex social and scientific questions about how to assess and manage our water resources. This challenge becomes particularly difficult as policy and management objectives require scientific assessments of...
Simulation of runoff and recharge and estimation of constituent loads in runoff, Edwards aquifer recharge zone (outcrop) and catchment area, Bexar County, Texas, 1997-2000
Darwin J. Ockerman
2002, Water-Resources Investigations Report 2002-4241
The U.S. Geological Survey developed a watershed model (Hydrological Simulation Program—FORTRAN) to simulate runoff and recharge and to estimate constituent loads in surface-water runoff in the Edwards aquifer recharge zone (outcrop) and catchment area in Bexar County, Texas. Rainfall and runoff data collected during 1970–98 from four gaged basins in...
Streamflow and nutrient data for the Yazoo River below Steele Bayou near Long Lake, Mississippi, 1996-2000
Michael S. Runner, D. Phil Turnipseed, Richard H. Coupe
2002, Water-Resources Investigations Report 2002-4215
Increased nutrient loading to the Gulf of Mexico from off-continent flux has been identified as contributing to the increase in the areal extent of the low dissolved-oxygen zone that develops annually off the Louisiana and Texas coast. The proximity of the Yazoo River Basin in northwestern Mississippi to the Gulf...
Hydrogeology and simulated effects of ground-water withdrawals from the Floridan aquifer system in Lake County and in the Ocala National Forest and vicinity, north-central Florida
Leel Knowles Jr., Andrew M. O’Reilly, James C. Adamski
2002, Water-Resources Investigations Report 2002-4207
The hydrogeology of Lake County and the Ocala National Forest in north-central Florida was evaluated (1995-2000), and a ground-water flow model was developed and calibrated to simulate the effects of both present day and future ground-water withdrawals in these areas and the surrounding vicinity. A predictive model simulation was performed...
Geology and hydrogeology of the Caribbean Islands aquifer system of the Commonwealth of Puerto Rico and the U.S. Virgin Islands
Robert A. Renken, W. C. Ward, I. P. Gill, Fernando Gómez-Gómez, Jesús Rodríguez-Martínez
2002, Professional Paper 1419
Poorly lithified to unconsolidated carbonate and clastic sedimentary rocks of Tertiary (Oligocene to Pliocene) and Quaternary (Pleistocene to Holocene) age compose the South Coast aquifer and the North Coast limestone aquifer system of Puerto Rico; poorly lithified to unlithified carbonate rocks of late Tertiary (early Miocene to Pliocene) age make...
