Geology topics
Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
Publications and source records attributed to Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey.
Description of digital aeromagnetic data collected north and west of Albuquerque, New Mexico
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Digital compilation of landslide overview map of the conterminous United States
This dataset consists of polygons enclosing areas of landslide incidence and susceptibility for the conterminous United States.
Geology, mineral and energy resources, Mimbres Resource Area, New Mexico
No abstract available.
User's manual for the National Water Information System of the U.S. Geological Survey; Chapter 1, Ground-water site-inventory system
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User's manual for the National Water Information System (NWIS); Chapter 5, Water-use data system; Part 1, Site-specific water-use data system (SWUDS)
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Water Resources Data, Florida, Water Year 1996. Volume 1B. Northeast Florida Ground Water
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GAP Analysis Bulletin Number 6
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South Florida Ecosystem Program web site
Introduction The South Florida Ecosystem Restoration Program is an intergovernmental effort, involving a number of agencies, 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), one of the agencies, provides scientific information a part of the South Florida Ecosystem Restoration Program (SFEP). The USGS began their own program, called the South Florida Ecosystem Program, in fiscal year 1995 for the purpose of gathering hydrologic, cartographic, geologic, and biologic data that relate to the mainland of south Florida, Florida Bay, and the Florida Keys and Reef ecosystems.
Hydrogeology of the surficial aquifer system in Southwest Florida
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 its more natural state as overland flow, several changes are predicted to occur. First, because water flowing over land moves more slowly than in canals, overland flow should remain in the wetland ecosystem for a longer period each year. Second, as the flowing water spreads out over the wetlands, recharge to the shallow aquifers should increase as more of that water infiltrates into the ground. The U.S. Corps of Engineers and the South Florida Water Management District (SFWMD) will use hydrologic models to anticipate the consequences of these proposed restoration plans. This research program is designed to provide essential subsurface data to improve hydrologic models for land and water managers in southwest Florida where subsurface information is lacking. Obtaining hydrogeological data requires core drilling, corehole testing, and rock and sediment analysis.
South Florida High-accuracy elevation data collection project
Background The major issues facing ecosystem restoration and management in south Florida are centered on the availability and distribution of clean, fresh water. Surface water flow modeling studies are an important aspect of the scientific information needs of the ecosystem restoration initiative. Hydrologic models provide much needed predictive capabilities for evaluating options for management of parks, refuges, and lands planned for acquisition, as well as for understanding the impacts of land management practices in surrounding areas. Models must account for the expansive and extremely low relief terrain of south Florida, where surface waters of the natural system are transported by sheet flow from Lake Okeechobee through the Everglades to Florida Bay and the Gulf of Mexico. To model sheet flows, highly accurate elevation data that define the surface topography are required as the most critical input parameter to the Natural Systems Model and other hydrologic models. These data are necessary for calculating water surface slope, depth, velocity, and direction of flow. Hydrologists have stated vertical accuracy requirements of between 3 and 15 centimeters. These accuracy requirements are so stringent, because of the extremely flat terrain, that any standard or other currently available data products would not suffice for this modeling application.
U.S. Geological Survey: credibility, impartiality, interpretive studies, relevant data, scientific excellence
No abstract available.
The geologic story of the Ocoee River : see the river -- see the rapids -- see the rocks!
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U. S. Geological Survey yearbook, fiscal year 1995; understanding the Earth
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Helping Your Child Learn Geography
By the year 2000, all students will leave grades 4, 8, and 12 having demonstrated competency over challenging subject matter including English, mathematics, science, foreign languages, civics and government, economics, arts, history, and geography, and every school in America will ensure that all students learn to use their minds well, so they may be prepared for responsible citizenship, further learning, and productive employment in our Nation's modern economy.
National Digital Orthophoto Program
A critical component of the National Spatial Data Infrastructure (NSDI) is Framework. Framework provides a base on which to collect, register, and integrate geospatial information accurately and consistently. The Federal Geographic Data Committee (FGDC) proposed that Framework include geodetic control, orthoimagery, elevation, transportation, hydrography, governmental units, and cadastral data. The Mapping Science Committee of the National Research Council recommends that geodetic control, orthoimagery, and elevation data become the critical foundation of the NSDI. The National Digital Orthophoto Program (NDOP) is a working model on how Federal, State, and local government, as well as private industry, can participate to develop the orthoimagery Framework for the Nation.