Nature and transformation of dissolved organic matter in treatment wetlands
L. B. Barber, J.A. Leenheer, T.I. Noyes, E.A. Stiles
2001, Environmental Science & Technology (35) 4805-4816
This investigation into the occurrence, character, and transformation of dissolved organic matter (DOM) in treatment wetlands in the western United States shows that (i) the nature of DOM in the source water has a major influence on transformations that occur during treatment, (ii) the climate factors have a secondary effect...
Mercury and methylmercury in water and sediment of the Sacramento River Basin, California
Joseph L. Domagalski
2001, Applied Geochemistry (16) 1677-1691
Mercury (Hg) and methylmercury (CH3Hg+) concentrations in streambed sediment and water were determined at 27 locations throughout the Sacramento River Basin, CA. Mercury in sediment was elevated at locations downstream of either Hg mining or Au mining activities where Hg was used in the recovery of Au. Methylmercury in sediment...
Streamflow forecasting using the modular modeling system and an object-user interface
A.E. Jeton
2001, Conference Paper, Proceedings of The Western Snow Conference
The U.S. Geological Survey (USGS), in cooperation with the Bureau of Reclamation (BOR), developed a computer program to provide a general framework needed to couple disparate environmental resource models and to manage the necessary data. The Object-User Interface (OUI) is a map-based interface for models and modeling data. It provides...
Pesticides in the hydrologic system - What do we know and what's next?
R. J. Gilliom
2001, Hydrological Processes (15) 3197-3201
Even though the occurrence and behaviour of pesticides in the environment have been studied for decades, water-quality managers and the public still demand more complete and consistent information, and there are many unanswered questions for environmental scientists. In many respects, the greatest potential for unintended adverse effects of pesticides is...
The geology and palynology of lower and Middle Pennsylvanian strata in the Western Kentucky Coal Field
C.F. Eble, S.F. Greb, D.A. Williams
2001, International Journal of Coal Geology (47) 189-206
The Western Kentucky Coal Field is the southern tip of the Eastern Interior, or Illinois Basin. Pennsylvanian rocks in this area, which include conglomerate, sandstone, shale, limestone and coal, were deposited primarily in coastal-deltaic settings at a time when western Kentucky was located close to the equator. This paper discusses...
Development and application of a spatial hydrology model of Okefenokee Swamp, Georgia
C.S. Loftin, W.M. Kitchens, N. Ansay
2001, Journal of the American Water Resources Association (37) 935-956
The model described herein was used to assess effects of the Suwannee River sill (a low earthen dam constructed to impound the Suwannee River within the Okefenokee National Wildlife Refuge to eliminate wildfires) on the hydrologic environment of Okefenokee Swamp, Georgia. Developed with Arc/Info Macro Language routines in the GRID...
A process for fire-related debris flow initiation, Cerro Grande fire, New Mexico
S.H. Cannon, E.R. Bigio, E. Mine
2001, Hydrological Processes (15) 3011-3023
In this study we examine factors that pertain to the generation of debris flows from a basin recently burned by wildfire. Throughout the summer 2000 thunderstorm season, we monitored rain gauges, channel cross-sections, hillslope transects, and nine sediment-runoff traps deployed in a steep, 0??15 km2 basin burned by the May...
Post-fire, rainfall intensity-peak discharge relations for three mountainous watersheds in the Western USA
J. A. Moody, D.A. Martin
2001, Hydrological Processes (15) 2981-2993
Wildfire alters the hydrologic response of watersheds, including the peak discharges resulting from subsequent rainfall. Improving predictions of the magnitude of flooding that follows wildfire is needed because of the increase in human population at risk in the wildland-urban interface. Because this wildland-urban interface is typically in mountainous terrain, we...
The occurrence and distribution of selected trace elements in the upper Rio Grande and tributaries in Colorado and Northern New Mexico
Howard E. Taylor, Ronald C. Antweiler, D.A. Roth, T.I. Brinton, D.B. Peart, D. F. Healy
2001, Archives of Environmental Contamination and Toxicology (41) 410-426
Two sampling trips were undertaken in 1994 to determine the distribution of trace elements in the Upper Rio Grande and several of its tributaries. Water discharges decreased in the main stem of the Rio Grande from June to September, whereas dissolved concentrations of trace elements generally increased. This is attributed...
Lessons learned from long-term ecosystem research and monitoring in alpine and subalpine basins of the Colorado Rocky Mountains, USA
Jill Baron
2001, Ekologia (Bratislava) (20) 25-30
Long-term ecosystem research and monitoring was begun in the Loch Vale watershed of Rocky Mountain National Park in 1983, after extensive survey work to identify the best location. Then, as now, our scientific objectives were to understand natural biogeochemical cycles and variability, so that we could differentiate ecosystem changes from...
Differentiating nonpoint sources of deisopropylatrazine in surface water using discrimination diagrams
M. T. Meyer, E.M. Thurman, D. A. Goolsby
2001, Journal of Environmental Quality (30) 1836-1843
Pesticide degradates account for a significant portion of the pesticide load in surface water. Because pesticides with similar structures may degrade to the same degradate, it is important to distinguish between different sources of parent compounds that have different regulatory and environmental implications. A discrimination diagram, which is a sample...
Online bibliographic sources in hydrology
2001, Book chapter, Information and the professional scientist and engineer
No abstract available....
Water quality and occurrence of methyl-tert butyl ether (MTBE) and other fuel related compounds in lakes and ground water at lakeside communities in Sussex and Morris Counties, New Jersey, 1998-1999
Arthur L. Baehr, Timothy J. Reilly
2001, Water-Resources Investigations Report 2001-4149
Densely populated communities surround many of the larger lakes in northwestern New Jersey. These communities derive most of their water supply from wells. The lakes can be navigated by gasoline-powered watercraft, can be in various stages of eutrophication, may contain pathogens associated with bathing and waterfowl, and are periodically subjected...
Analysis of ambient conditions and simulation of hydrodynamics, constituent transport, and water-quality characteristics in Lake Maumelle, Arkansas, 1991-92
W. Reed Green
2001, Water-Resources Investigations Report 2001-4045
Lake Maumelle is the major drinking-water source for the Little Rock metropolitan area in central Arkansas. Urban and agricultural development has increased in the Lake Maumelle Basin and information is needed related to constituent transport and water quality response to changes in constituent loading or hydrologic regime. This report characterizes...
Use of macroinvertebrates to identify cultivated wetlands in the Prairie Pothole Region
Ned H. Euliss Jr., David M. Mushet, Douglas H. Johnson
2001, Wetlands (21) 223-231
We evaluated the use of macroinvertebrates as a potential tool to identify dry and intensively farmed temporary and seasonal wetlands in the Prairie Pothole Region. The techniques we designed and evaluated used the dried remains of invertebrates or their egg banks in soils as indicators of wetlands. For both the...
Simulated ground-water flow and water quality of the Mississippi River alluvium near Burlington, Iowa, 1999
Robert A. Boyd
2001, Water-Resources Investigations Report 2000-4274
The City of Burlington, Iowa, obtains some of its public water supply by withdrawing ground water from the Mississippi River alluvium, an alluvial aquifer adjacent to the Mississippi River. The U.S. Geological Survey, in cooperation with the City of Burlington, conducted a hydrologic study of the Mississippi River alluvium near...
Preliminary evaluation of the importance of existing hydraulic-head observation locations to advective-transport predictions, Death Valley regional flow system, California and Nevada
Mary C. Hill, D. Matthew Ely, Claire R. Tiedeman, Grady M. O’Brien, Frank A. D’Agnese, Claudia C. Faunt
2001, Water-Resources Investigations Report 2000-4282
When a model is calibrated by nonlinear regression, calculated diagnostic statistics and measures of uncertainty provide a wealth of information about many aspects of the system. This report presents a method of ranking the likely importance of existing observation locations using measures of prediction uncertainty. It is suggested that continued...
Influence of natural factors on the quality of midwestern streams and rivers
Stephen D. Porter, Mitchell A. Harris, Stephen J. Kalkhoff
2001, Water-Resources Investigations Report 2000-4288
Streams flowing through cropland in the Midwestern Corn Belt differ considerably in their chemical and ecological characteristics, even though agricultural land use is highly intensive throughout the entire region. These differences likely are attributable to differences in riparian vegetation, soil properties, and hydrology. This conclusion is based on results from...
Model simulation of the Manasquan water-supply system in Monmouth County, New Jersey
Ming Chang, Gary D. Tasker, Steven Nieswand
2001, Water-Resources Investigations Report 2001-4172
Model simulation of the Manasquan Water Supply System in Monmouth County, New Jersey, was completed using historic hydrologic data to evaluate the effects of operational and withdrawal alternatives on the Manasquan reservoir and pumping system. Changes in the system operations can be simulated with the model using precipitation forecasts. The Manasquan...
Water Resources Data, Georgia, 2001, Volume 1: Continuous water-level, streamflow, water-quality data, and periodic water-quality data, Water Year 2001
Brian E. McCallum, John F. Kerestes, Andrew C. Hickey
2001, Water Data Report GA-01-1
Water resources data for the 2001 water year for Georgia consists of records of stage, discharge, and water quality of streams; and the stage and contents of lakes and reservoirs published in two volumes in a digital format on a CD-ROM. Volume one of this report contains water resources data...
Water Resources Data, Georgia, 2001, Volume 2: Continuous ground-water level data, and periodic surface-water- and ground-water-quality data, Calendar Year 2001
Robert Coffin, Susan C. Grams, Alan M. Cressler, David C. Leeth
2001, Water Data Report GA-01-2
Water resources data for the 2001 water year for Georgia consists of records of stage, discharge, and water quality of streams; and the stage and contents of lakes and reservoirs published in two volumes in a digital format on a CD-ROM. Volume one of this report contains water resources data...
MODFLOW-2000, the U.S. Geological Survey modular ground-water model: User guide to the LMT6 package, the linkage with MT3DMS for multi-species mass transport modeling
Chunmiao Zheng, Mary Catherine Hill, Paul A. Hsieh
2001, Open-File Report 2001-82
MODFLOW-2000, the newest version of MODFLOW, is a computer program that numerically solves the three-dimensional ground-water flow equation for a porous medium using a finite-difference method. MT3DMS, the successor to MT3D, is a computer program for modeling multi-species solute transport in three-dimensional ground-water systems using multiple solution techniques, including the...
Ground-water discharge determined from estimates of evapotranspiration, Death Valley regional flow system, Nevada and California
Randell J. Laczniak, J. LaRue Smith, Peggy E. Elliott, Guy A. DeMeo, Melissa A. Chatigny, Gaius J. Roemer
2001, Water-Resources Investigations Report 2001-4195
The Death Valley regional flow system (DVRFS) is one of the larger ground-water flow systems in the southwestern United States and includes much of southern Nevada and the Death Valley region of eastern California. Centrally located within the ground-water flow system is the Nevada Test Site (NTS). The NTS, a...
Estimating the magnitude and frequency of floods in rural basins of North Carolina— Revised
Benjamin F. Pope, Gary D. Tasker, Jeanne C. Robbins
2001, Water-Resources Investigations Report 2001-4207
A statewide study was conducted to develop two methods for estimating the magnitude and frequency of floods in rural ungaged basins in North Carolina. Flood-frequency estimates for gaged sites in North Carolina were computed by fitting the annual peak flows for each site to a log-Pearson Type III distribution. As...
River and Reservoir Operations Model, Truckee River basin, California and Nevada, 1998
Steven N. Berris, Glen W. Hess, Larry R. Bohman
2001, Water-Resources Investigations Report 2001-4017
The demand for all uses of water in the Truckee River Basin, California and Nevada, commonly is greater than can be supplied. Storage reservoirs in the system have a maximum effective total capacity equivalent to less than two years of average river flows, so longer-term droughts can result in substantial...
