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Page 1994, results 49826 - 49850

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Not all publications have extents, not all extents are completely accurate
Adaptive management: The U.S. Department of the Interior technical guide
B K Williams, Robert C. Szaro, Carl D. Shapiro
2009, Report
The purpose of this technical guide is to present an operational definition of adaptive management, identify the conditions in which adaptive management should be considered, and describe the process of using adaptive management for managing natural resources. The guide is not an exhaustive discussion of adaptive management, nor does it...
Tritium concentrations in environmental samples and transpiration rates from the vicinity of Mary's Branch Creek and background areas, Barnwell, South Carolina, 2007-2009
Don A. Vroblesky, Judy L. Canova, Paul M. Bradley, James Landmeyer
2009, Scientific Investigations Report 2009-5245
Tritium in groundwater from a low-level radioactive waste disposal facility near Barnwell, South Carolina, is discharging to Mary's Branch Creek. The U.S. Geological Survey conducted an investigation from 2007 to 2009 to examine the tritium concentration in trees and air samples near the creek and in background areas, in groundwater...
Sediment Characteristics and Transport in the Kootenai River White Sturgeon Critical Habitat near Bonners Ferry, Idaho
Ryan L. Fosness, Marshall L. Williams
2009, Scientific Investigations Report 2009-5228
Recovery efforts for the endangered Kootenai River population of white sturgeon require an understanding of the characteristics and transport of suspended and bedload sediment in the critical habitat reach of the river. In 2007 and 2008, the U.S. Geological Survey in cooperation with the Kootenai Tribe of Idaho, conducted suspended-...
Effects of roads, topography, and land use on forest cover dynamics in the Brazilian Atlantic Forest
Simone R. Freitas, Todd Hawbaker, Jean Paul Metzger
2009, Forest Ecology and Management (259) 410-417
Roads and topography can determine patterns of land use and distribution of forest cover, particularly in tropical regions. We evaluated how road density, land use, and topography affected forest fragmentation, deforestation and forest regrowth in a Brazilian Atlantic Forest region near the city...
Mapping irrigated lands across the United States using MODIS satellite imagery
J.F. Brown, S.K. Maxwell, Md Shahriar Pervez
Prasad S. Thenkabail, Chandrashekhar M. Biradar, Hugh Turral, John G. Lyon, editor(s)
2009, Book chapter, Remote sensing of global croplands for food security
This book opens a new pathway for global mapping that is focused on a specific land use theme, such as irrigated or rain-fed croplands and classes within these themes. Since croplands use most of the water consumed by humans, specific knowledge of irrigated and rain-fed croplands will be critical for...
Diverse elevational diversity gradients in Great Smoky Mountains National Park, U.S.A.: Chapter 10
Nathan J. Sanders, Robert R. Dunn, Matthew C. Fitzpatrick, Christopher E. Carlton, Michael R. Pogue, Charles R. Parker, Theodore R. Simons
2009, Book chapter, Data mining for global trends in mountain biodiversity
Why does the number of species vary geographically? The earliest naturalists puzzled over this question, as do many biogeographers and macroecologists today. Over the last 200-plus years, the most striking geographic pattern in species richness – the decline in species richness with increasing latitude – has received the most attention....
Use of StreamStats in the Upper French Broad River Basin, North Carolina: A Pilot Water-Resources Web Application
Chad R. Wagner, Kirsten C. Tighe, Silvia Terziotti
2009, Fact Sheet 2009-3088
StreamStats is a Web-based Geographic Information System (GIS) application that was developed by the U.S. Geological Survey (USGS) in cooperation with Environmental Systems Research Institute, Inc. (ESRI) to provide access to an assortment of analytical tools that are useful for water-resources planning and management. StreamStats allows users to easily obtain...
Flood of June 26-29, 2006, Mohawk, Delaware, and Susquehanna River Basins, New York
Thomas P. Suro, Gary D. Firda, Carolyn O. Szabo
2009, Open-File Report 2009-1063
A stalled frontal system caused tropical moisture to be funneled northward into New York, causing severe flooding in the Mohawk, Delaware, and Susquehanna River basins during June 26-29, 2006. Rainfall totals for this multi-day event ranged from 2 to 3 inches to greater than 13 inches in southern New York....
Potentiometric Surface of the Upper Floridan Aquifer, West-Central Florida, September 2008
Anita G. Ortiz
2009, Scientific Investigations Map 3071
The Floridan aquifer system consists of the Upper and Lower Floridan aquifers separated by the middle confining unit. The middle confining unit and the Lower Floridan aquifer in west-central Florida generally contain highly mineralized water. The water-bearing units containing fresh water are herein referred to as the Upper Floridan aquifer....
DayCent-Chem simulations of ecological and biogeochemical processes of eight mountain ecosystems in the United States
Melannie D. Hartman, Jill S. Baron, David W. Clow, Irena F. Creed, Charles T. Driscoll, Holly A. Ewing, Bruce D. Haines, Jennifer Knoepp, Kate Lajtha, Dennis S. Ojima, William J. Parton, Jim Renfro, R. Bruce Robinson, Helga Van Miegroet, Kathleen C. Weathers, Mark W. Williams
2009, Scientific Investigations Report 2009-5150
Atmospheric deposition of nitrogen (N) and sulfur (S) cause complex responses in ecosystems, from fertilization to forest ecosystem decline, freshwater eutrophication to acidification, loss of soil base cations, and alterations of disturbance regimes. DayCent-Chem, an ecosystem simulation model that combines ecosystem nutrient cycling and plant dynamics with aqueous geochemical equilibrium...
Simulations of Groundwater Flow and Particle Tracking Analysis in the Area Contributing Recharge to a Public-Supply Well near Tampa, Florida, 2002-05
Christy A. Crandall, Leon J. Kauffman, Brian G. Katz, Patricia A. Metz, W. Scott McBride, Marian P. Berndt
2009, Scientific Investigations Report 2008-5231
Shallow ground water in the north-central Tampa Bay region, Florida, is affected by elevated nitrate concentrations, the presence of volatile organic compounds, and pesticides as a result of groundwater development and intensive urban land use. The region relies primarily on groundwater for drinking-water supplies. Sustainability of groundwater quality for public...
Ecological assessment of wadeable streams on O`ahu, Hawai'i, 2006-2007: A pilot study
Reuben H. Wolff, Linda A. Koch
2009, Scientific Investigations Report 2009-5229
In 2006–07, the U.S. Geological Survey (USGS) Pacific Islands Water Science Center (PIWSC), in cooperation with the Hawai‘i Department of Health (HDOH), conducted a pilot study as a participant in the U.S. Environmental Protection Agency’s (USEPA) Wadeable Streams Assessment (WSA) program. Forty randomly selected sites on perennial streams on O‘ahu,...
Greater Platte River Basins - Science to sustain ecosystems and communities
June M. Thormodsgard
2009, Fact Sheet 2009-3097
The Greater Platte River Basins (GPRB), located in the heartland of the United States, provides a collaborative opportunity for the U.S. Geological Survey (USGS) and its partners to understand the sustainability of natural and managed ecosystems under changing climate and resource requirements.The Greater Platte River Basins, an area of about...
Web application to access U.S. Army Corps of Engineers Civil Works and Restoration Projects information for the Rio Grande Basin, southern Colorado, New Mexico, and Texas
Christy-Ann M. Archuleta, Deanna R. Eames
2009, Fact Sheet 2009-3104
The Rio Grande Civil Works and Restoration Projects Web Application, developed by the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers (USACE) Albuquerque District, is designed to provide publicly available information through the Internet about civil works and restoration projects in the Rio Grande Basin. Since...
Application of the Hydroecological Integrity Assessment Process for Missouri Streams
Jonathan G. Kennen, James A. Henriksen, John Heasley, Brian S. Cade, James W. Terrell
2009, Open-File Report 2009-1138
Natural flow regime concepts and theories have established the justification for maintaining or restoring the range of natural hydrologic variability so that physiochemical processes, native biodiversity, and the evolutionary potential of aquatic and riparian assemblages can be sustained. A synthesis of recent research advances in hydroecology, coupled with stream classification...
History of the topographic branch (division)
Richard T. Evans, Helen M. Frye
2009, Circular 1341
From a very early period of the world's existence, man has endeavored to represent the earth's surface in a graphic form for the information of his fellow men, realizing that no oral or written description is capable of setting forth topographic facts so vividly and so clearly as a map. Mapping...
Groundwater Conditions and Studies in the Albany Area of Dougherty County, Georgia, 2008
Debbie W. Gordon
2009, Open-File Report 2009-1244
The U.S. Geological Survey has been working cooperatively with the Albany Water, Gas, and Light Commission to monitor groundwater quality and availability since 1977. This report presents an overview of groundwater conditions and studies in the Albany area of Dougherty County, Georgia, during 2008. Historical data also are presented for...
Long-Term Stage, Stage-Residual, and Width Data for Streams in the Piedmont Physiographic Region, Georgia
Jeffrey W. Riley, Robert B. Jacobson
2009, Open-File Report 2009-1205
This report presents the data used to assess geomorphic adjustment of streams over time and to changing land-use conditions. Thirty-seven U.S. Geological Survey streamgages were selected within the Piedmont physiographic region of Georgia. Width, depth, stage, and discharge data from these streams were analyzed to assess channel stability and determine...
A Comparison of Turbidity-Based and Streamflow-Based Estimates of Suspended-Sediment Concentrations in Three Chesapeake Bay Tributaries
John D. Jastram, Douglas Moyer, Kenneth Hyer
2009, Scientific Investigations Report 2009-5165
Fluvial transport of sediment into the Chesapeake Bay estuary is a persistent water-quality issue with major implications for the overall health of the bay ecosystem. Accurately and precisely estimating the suspended-sediment concentrations (SSC) and loads that are delivered to the bay, however, remains challenging. Although manual sampling of SSC produces...
Survey of ungulate abundance on Santa Rosa Island, Channel Islands National Park, California, March 2009
Paul C. Griffin, Kate A. Schoenecker, Peter J. Gogan, Bruce C. Lubow
2009, Open-File Report 2009-1243
Reliable estimates of elk (Cervus elaphus) and deer (Odocoileus hemionus) abundance on Santa Rosa Island, Channel Islands National Park, California, are required to assess the success of management actions directed at these species. We conducted a double-observer aerial survey of elk on a large portion of Santa Rosa Island on...