User guide for the drawdown-limited, multi-node well (MNW) package for the U.S. Geological Survey's modular three-dimensional finite-difference ground-water flow model, versions MODFLOW-96 and MODFLOW-2000
Keith J. Halford, Randall T. Hanson
2002, Open-File Report 02-293
A computer program called the drawdown-limited, Multi-Node Well (MNW) Package was developed for the U.S. Geological Survey three-dimensional finite-difference modular ground-water flow model, commonly referred to as MODFLOW. The MNW Package allows MODFLOW users to simulate wells that extend beyond a single model node. Multi-node wells can simulate wells that...
Using the National Flood Frequency Program, version 3; a computer program for estimating magnitude and frequency of floods for ungaged sites
Craig D. Perl, Kernell G. Ries III
2002, Fact Sheet 084-02
Guidance on the use of passive-vapor-diffusion samplers to detect volatile organic compounds in ground-water-discharge areas, and example applications in New England
Peter E. Church, Don A. Vroblesky, Forest P. Lyford
2002, Water-Resources Investigations Report 2002-4186
Polyethylene-membrane passive-vapor-diffusion samplers, or PVD samplers, have been shown to be an effective and economical reconnaissance tool for detecting and identifying volatile organic compounds (VOCs) in bottom sediments of surface-water bodies in areas of ground-water discharge. The PVD samplers consist of an empty glass vial enclosed in two layers of...
Observed and predicted pier scour in Maine
Glenn A. Hodgkins, Pamela J. Lombard
2002, Water-Resources Investigations Report 2002-4229
Pier-scour and related data were collected and analyzed for nine high river flows at eight bridges across Maine from 1997 through 2001. Six bridges had multiple piers. Fifteen of 23 piers where data were measured during a high flow had observed maximum scour depths ranging from 0.5 feet (ft) to...
Assessment of stream quality using biological indices at selected sites in the Brandywine Creek basin, Chester County, Pennsylvania, 1981-97
Andrew G. Reif
2002, Fact Sheet 117-02
In 1970, the Chester County Water Resources Authority (Pennsylvania) and the U.S. Geological Survey (USGS) established a longterm water-quality network with the goal of assessing the quality of streams in the county and understanding stream changes in response to urbanization using benthic-macroinvertebrate data. This database represents one of the longest...
The loads of selected herbicides in the Ohio River basin, 1997-2000
Angela S. Crain
2002, Fact Sheet 089-02
Barrier island elevations relevant to potential storm impacts; 1, Techniques
Nicole A. Elko, Sallenger Jr., Kristy K. Guy, Hilary F. Stockdon, Karen L.M. Morgan
2002, Open-File Report 2002-287
Tidal asymmetry and variability of bed shear stress and sediment bed flux at a site in San Francisco Bay, USA
Matthew L. Brennan, David H. Schoellhamer, Jon R. Burau, Stephen G. Monismith
J.C. Winterwerp, C. Kranenburg, editor(s)
2002, Book chapter, Fine sediment dynamics in the marine environment
The relationship between sediment bed flux and bed shear stress during a pair of field experiments in a partially stratified estuary is examined in this paper. Time series of flow velocity, vertical density profiles, and suspended sediment concentration were measured continuously throughout the water column and intensely within 1 meter...
Redhead: Aythya americana
Marc C. Woodin, Thomas C. Michot
2002, Book
No abstract available....
Detection and mapping of fractures and cavities using borehole radar
F.P. Haeni, Lucien Halleux, Carole D. Johnson, John W. Lane Jr.
2002, Conference Paper, Proceedings: Fractured Rock 2002
Borehole radar can be used in a single-hole reflection mode or in a cross-hole tomography mode. In the reflection mode, radar provides an image of discontinuities in the bedrock surrounding a borehole, including bedding planes, lithologic contacts, fractures, and cavities. The measurements are either directional or omni-directional, depending upon...
Use of vertical-radar profiling to estimate porosity at two New England sites and comparison with neutron log porosity
Marc L. Buursink, John W. Lane Jr., W.P. Clement, Michael D. Knoll
2002, Conference Paper, Proceedings: Symposium on the application of geophysics to engineering and environmental problems
No abstract available....
Managing agricultural wetlands for waterbirds in the coastal regions of Louisiana, U.S.A.
J.V. Huner, Clinton W. Jeske, Wayne Norling
2002, Waterbirds (25) 66-78
Rice and/or crawfish are cultivated in over 225,000 ha of shallow earthen impoundments within 160 km of the Gulf of Mexico along the coast of Louisiana. The region includes both the Gulf Coastal Plain and Prairie and the Lower Mississippi River Valley. Annual loss of 4,475 ha of coastal wetlands...
Platinum-group element mineralization in the Stillwater Complex, Montana
Michael L. Zientek, Roger W. Cooper, Sam R. Corson, E. P. Geraghty
2002, Book chapter, The geology, geochemistry, mineralogy and mineral beneficiation of platinum-group elements
No abstract available....
Water depth tolerances of dominant tree island species: What do we know?
William H. Conner, Thomas W. Doyle, Daniel Mason
2002, Book chapter, Tree islands of the Everglades
Common woody species growing on tree islands in the Water Conservation Areas of South Florida include redbay, sweetbay, coastal-plain willow, wax myrtle, dahoon holly, cocoplum, pond-apple, red maple, cypress, gumbo-limbo, strangler fig and buttonbush. Very little is known about the flooding tolerance of most of these species. In this paper,...
Intertidal zones
Virginia Burkett
2002, Book chapter, Encyclopedia of global environmental change
No abstract available...
Mangrove ecology
Philippe Hensel, E. Proffitt, P. Delgado
2002, Book chapter, Oil spills in mangroves: Planning & response considerations
No abstract available....
Issues in characterizing phenology from satellite observations
B. C. Reed, J.F. Brown
2002, Conference Paper, Use of Earth Observation Data for Phenological Monitoring, Ispra, Italy, 2–13 December 2002, Proceedings
Over the past decade, many investigators have published techniques for deriving phenological parameters, especially the start of the growing season (SOS), from time-series satellite imagery. The principal satellite sensor for these studies is the advanced very high resolution radiometer (AVHRR). This study investigates the characteristics of four of the primary...
The development of a decision support system for prioritizing forested wetland restoration areas in the lower Yazoo River basin, Mississippi
Angela A. Davis, Barbara A. Kleiss, Charles G. O'Hara, Jennifer S. Derby
2002, Book chapter, Proceedings of a conference on sustainability of wetlands and water resources: How well can riverine wetlands continue to support society into the 21st century?
No abstract available....
Historical trend in ice thickness on the Piscataquis River in central Maine.
Thomas G. Huntington, Robert W. Dudley, Glenn A. Hodgkins
2002, Conference Paper, Proceedings of the 59th Eastern Snow Conference, June 5-7, 2002, Stowe, VT
We analyzed a long-term record of ice thickness on the Piscataquis River in central Maine to determine whether there were temporal trends that were associated with climate warming. Trends in ice thickness were compared and correlated with regional time series of winter air temperature, heating degree days (HDD) , date of river ice-out,...
SHRIMP and Conventional UPb ages of Ordovician granites and tonalites in the central Appalachian Piedmont: Implications for Paleozoic tectonic events
John N. Aleinikoff, J. Wright Horton, Jr., Avery Ala Drake
2002, American Journal of Science (302) 50-75
Discordant Cambrian U-Pb ages of questionable reliability for metamor-phosed plutonic rocks in the central Appalachian Piedmont of northern Virginia, Maryland, and the District of Columbia have led to different regional geologic interpretations and controversies. In this study, we use the sensitive high resolution ion microprobe (SHRIMP) for dating 25-m diameter...
Evaluating the performance of a crop water balance model in estimating regional crop production
Gabriel B. Senay, James Verdin
2002, Conference Paper, ISPRS archives – Volume XXXIV part 1, 2002
The comparison between a spatially distributed crop index and reported yield was evaluated. The crop index was generated by a crop water balance model that simulates the reduction of crop yield (as a percentage of the potential) due to water deficit. This model is currently operational as a monitoring and...
Coal waste impoundments: Risks, responses and alternatives
Committee on Coal Waste Impoundments, F. M. Orr Jr., Gary A. Davis, Barbara A. Filas, C. David Henry, Norbert R. Morgenstern, David A. Newman, Raja V. Ramani, Robert L. Schuster, Madan M. Singh, Don W. Steeples, Clinton L. Strachan, Richard J. Sweigard, Jack Tisdale, David R. Wunsch
2002, Book
No abstract available....
Geologic information for aggregate resource planning
William H. Langer, David A. Lindsey, Daniel H. Knepper
2002, Book chapter, Deposit and geoenvironmental models for resource exploitation and environmental security
Construction and maintenance of the infrastructure is dependent on such raw materials as aggregate (crushed stone, sand, and gravel). Despite this dependence, urban expansion often works to the detriment of the production of those essential raw materials. The failure to plan for the protection and extraction of aggregate resources...
Late Miocene and early Pliocene biosiliceous sedimentation along the California margin
John A. Barron, Mitchell Lyle, Itaru Koizumi
2002, Revista Mexicana de Ciencias Geológicas (19) 161-169
Biogenic opal sedimentation is compared between offshore and onshore areas of the California margin during the late middle Miocene, the late Miocene, and the early Pliocene. The records from offshore ODP Sites 1010 and 1021 have declining opal abundance, with a dramatic three-fold decline at about 11.5 Ma and a...
Estimating the potential for submergence for two wetlands in the Mississippi River Delta
J.M. Rybczyk, Donald R. Cahoon
2002, Estuaries (25) 985-998
We used a combined field and modeling approach to estimate the potential for submergence for one rapidly deteriorating (Bayou Chitigue Marsh) and one apparently stable (Old Oyster Bayou Marsh) saltmarsh wetland in coastal Louisiana, given two eustatic sea level rise scenarios: the current rate (0.15 cm year−1); and the central...
