Vertical exchange of ground water and surface water in the Florida Everglades
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 169-96
Introduction and Project ObjectivesKnowledge about hydrologic exchange between surface water and ground water is critical to understanding the movement of water and dissolved chemical constituents (solutes) in the Florida Everglades. This fact sheet describes a study that will quantify vertical exchange of water and solutes in the Everglades as part...
Hydrogeology of the surficial aquifer system in Southwest Florida
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 158-96
Restoration and management of the south Florida ecosystem will be guided by hydrologic models that simulate water flowing through the wetlands and shallow subsurface aquifers beneath them. The restoration of the ecosystem is, essentially, the restoration of the natural hydrologic system. As surface water is re-diverted from manmade canals to...
Color infrared digital orthophoto quadrangles for the South Florida ecosystem area
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 163-96
The South Florida Ecosystem Restoration Program is an intergovernmental effort to reestablish and maintain the ecosystems of south Florida. One element of the restoration effort is the development of a firm scientific basis for resource decision making. The U.S. Geological Survey (USGS) is one of the agencies that provides scientific...
Ecosystem history: Terrestrial and fresh-water ecosystems of southern Florida
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 146-96
IntroductionPlant and animal communities of the historic Everglades have undergone striking changes over the last few decades, including declines in wading bird populations, invasion by exotic (non-native) plant and animal species, and areal expansion of cattails into sawgrass marshes. Many of these changes have been attributed to human activities in...
Freshwater discharge to Florida Bay
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 135-96
The South Florida Ecosystem Program is a collaborative effort by Federal agencies, working with State and local agencies, to help resolve land-use demands and water-supply issues in south Florida. The role of the U.S. Geological Survey in the program is to provide scientific insight into south Florida's hydrology and geology,...
Sedimentation, sea-level rise and circulation in Florida Bay
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 156-96
Issue Recent algal blooms and seagrass mortality have raised concerns about the water quality of Florida Bay, particularly its nutrient content (nitrogen and phosphorus), hypersalinity, and turbidity. Water quality is closely tied to sediment transport processes because resuspension of sediments increases turbidity, releases stored nutrients, and facilitates sediment export to...
South Florida ecosystems; changes through time
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 171-95
Ecosystems are communities of organisms, often including humans, and the associated physical and chemical environments in which they live. Ecosystems are a complex natural resource that need to be understood, carefully managed, and prudently conserved. Human modification of the environment, such as changing water drainage patterns and introducing pollutants (such...
Canal and wetland flow transport interaction; coupling models for canal and wetland interactions in the South Florida ecosystem
Raymond W. Schaffranek
1999, Fact Sheet 139-96
IntroductionThe U.S. Geological Survey is one of several agencies participating in the scientific effort to provide knowledge that can help protect and preserve the ecosystem of south Florida. One project of the intergovernmental South Florida Ecosystem Program (SFEP) is focused on developing a computer model to simulate the flow of...
Internal surface water flows
Mitchell H. Murray
1999, Fact Sheet 175-96
Introduction The South Florida Ecosystem Restoration Program is an intergovernmental effort to reestablish and maintain the ecosystem of south Florida. One element of the restoration effort is the development of a firm scientific basis for resource decision making.The U.S. Geological Survey (USGS) provides scientitic information as part of the South Florida...
The Universal Transverse Mercator (UTM) grid
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 157-99
The most convenient way to identify points on the curved surface of the Earth is with a system of reference lines called parallels of latitude and meridians of longitude. On some maps, the meridians and parallels appear as straight lines. On most modern maps, however, the meridians and parallels appear...
Quality of ground water in Webb County, Texas, 1997-98
Rebecca B. Lambert, Charles A. Hartmann
1999, Fact Sheet 184-99
Rapid development and population growth are occurring in Webb County in south Texas (fig. 1). Water managers need information on the ground-water resources of the area to address the increased demand for water caused by the development. To help meet this need, the U.S. Geological Survey (USGS), in cooperation with...
Nitrogen concentrations and deposition in rainfall at two sites in the Coastal Bend area, South Texas, 1996-98
D.J. Ockerman, C.W. Livingston
1999, Fact Sheet 146-99
High-Resolution Land Use and Land Cover Mapping
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 189-99
As the Nation?s population grows, quantifying, monitoring, and managing land use becomes increasingly important. The U.S. Geological Survey (USGS) has a long heritage of leadership and innovation in land use and land cover (LULC) mapping that has been the model both nationally and internationally for over 20 years. At present,...
Oculina Bank - Geology of a Deep-Water Coral Reef Habitat off Florida
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 108-99
Seismograms live from around the world
Robert L. Woodward, Kaye M. Shedlock, Harold F. Bolton
1999, Fact Sheet 176-99
You can view earthquakes as they happen! Seismograms from seismic stations around the world are broadcast live, via the Internet, and are updated every 30 minutes, With an Internet connection and a web browser, you can view current seismograms and earthquake locations on your own computer. With special software also...
Fish-community assessment in Gore Creek, Colorado, 1998
Kirby H. Wynn
1999, Fact Sheet 186-99
Oregon
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 038-99
No abstract available....
New Hampshire
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 030-99
Arizona
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 004-99
Tennessee
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 044-99
Discharge, nitrate load, and residence time of ground water in the Chesapeake Bay watershed
Scott Phillips, Michael J. Focazio, L. Joseph Bachman
1999, Fact Sheet 150-99
Herbicides in the Pecatonica, Trempealeau, and Yahara Rivers in Wisconsin, May 1997-July 1998
David J. Graczyk, James P. Vanden Brook, Bruce D. Rheineck
1999, Fact Sheet 167-99
In 1997, Wisconsin farmers applied 8.7 million pounds of herbicides on corn. The five most commonly applied herbicides (in lb (pounds) of active ingredient per acre) on corn in 1997 were atrazine, metolachlor, acetochlor, alachlor and cyanazine. A 1996 study by the U.S. Geological Survey (USGS) and the Wisconsin...
Bottom sediments of Lorence Creek Lake, San Antonio, Texas, reflect contaminant trends in an urbanizing watershed
Patricia B. Ging, P. C. Van Metre, Edward Callender
1999, Fact Sheet 149-99
Historical use of pesticides and rapid urbanization have left their mark on the chemistry of bottom sediments in Lorence Creek Lake (fig. 1) in the northern part of San Antonio, Tex. Several metals, organochlorine compounds (pesticides and polychlorinated biphenyls [PCBs]), and polycyclic aromatic hydrocarbons (PAHs) detected in bottom sediments of...
The Virginia Beach shallow ground-water study
Henry M. Johnson
1999, Fact Sheet 173-99
IntroductionVirginia Beach is a rapidly growing city of more than 425,000 people. Sources of fresh water within the city, however, are limited. Prior to 1998, the Virginia Beach Public Utilities Department met the city's water needs by purchasing treated drinking water from the City of Norfolk. Because Norfolk had to...
Coal Resource Assessments in the Northern and Central Appalachian Coal Region
Water Resources Division, U.S. Geological Survey
1999, Fact Sheet 115-99
