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Percent impervious surface for selected Chesapeake Bay watersheds This dataset contains watershed means of estimated percent impervious surfaces for three time periods: 1992, 2002, and 2012. Estimates are based on coefficients derived from comparing land use of the 2012 NAWQA Wall-to-wall Anthropogenic Land-use Trends (NWALT) product to the 2011 National Land Cover Database (NLCD) imperviousness, then applying those coefficients to previous years (1974-2002) of the NWALT dataset. Categories: Data; Types: Citation; Tags: Chesapeake Bay, Delaware, District of Columbia, James River, Maryland, All tags... New York, Pennsylvania, Potomac River, Rappahannock River, Susquehanna River, Virginia, West Virginia, impervious surfaces, surface water quality, Fewer tags Simulated fate and transport of metolachlor in the unsaturated zone, Maryland, USA An unsaturated-zone transport model was used to examine the transport and fate of metolachlor applied to an agricultural site in Maryland, USA. The study site was instrumented to collect data on soil-water content, soil-water potential, ground water levels, major ions, pesticides, and nutrients from the unsaturated zone during 2002-2004. The data set was enhanced with site-specific information describing weather, soils, and agricultural practices. The Root Zone Water Quality Model was used to simulate physical, chemical, and biological processes occurring in the unsaturated zone. Model calibration to bromide tracer concentrations indicated flow occurred through the soil matrix. Simulated recharge rates were within... Categories: Publication; Types: Citation; Tags: Acetamides, Chemical, Herbicides, Maryland, Models, All tags... Soil, Theoretical, Water Pollutants, water, Fewer tags 2. Catalog of natural and induced earthquakes without duplicates The U. S. Geological Survey (USGS) makes long-term seismic hazard forecasts that are used in building codes. The hazard models usually consider only natural seismicity; non-tectonic (man-made) earthquakes are excluded because they are transitory or too small. In the past decade, however, thousands of earthquakes related to underground fluid injection have occurred in the central and eastern U.S. (CEUS), and some have caused damage. In response, the USGS is now also making short-term forecasts that account for the hazard from these induced earthquakes. A uniform earthquake catalog is assembled by combining and winnowing pre-existing source catalogs. Seismicity statistics are analyzed to develop recurrence models,... Types: Citation; Tags: Alabama, Arizona, Arkansas, Colorado, Connecticut, All tags... Delaware, District of Columbia, Earthquake, Florida, Georgia, Hazard, Illinois, Indiana, Induced, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Natural, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Pennsylvania, Rhode Island, Seismic, South Carolina, South Dakota, Tennessee, Texas, USA, United States, Utah, Vermont, Virginia, West Virginia, Wisconsin, Wyoming, Fewer tags USGS Topo Map Vector Data (Vector) 19979 Hedgesville WV (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Berkeley, Combined Vector, Combined Vector, All tags... Combined Vector, Downloadable Data, Esri Shapefile nan, MD, Maryland, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, WV, Washington, West Virginia, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 31903 Newark West DE (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Cecil, Chester, Combined Vector, All tags... Combined Vector, Combined Vector, DE, Delaware, Downloadable Data, Esri Shapefile nan, MD, Maryland, New Castle, PA, Pennsylvania, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 41000 Shepherdstown WV (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Berkeley, Combined Vector, Combined Vector, All tags... Combined Vector, Downloadable Data, Esri Shapefile nan, Jefferson, MD, Maryland, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, WV, Washington, West Virginia, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 70182 Girdletree MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Accomack, Combined Vector, Combined Vector, All tags... Combined Vector, Downloadable Data, Esri Shapefile nan, MD, Maryland, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, VA, Virginia, Worcester, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 40053 Savage MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Anne Arundel, Baltimore, Combined Vector, All tags... Combined Vector, Combined Vector, Downloadable Data, Esri Shapefile nan, Howard, MD, Maryland, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 49953 Wye Mills MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Combined Vector, Combined Vector, Combined Vector, All tags... Downloadable Data, Esri Shapefile nan, MD, Maryland, Public Land Survey System, Queen Anne's, Shapefile, Talbot, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 4274 Blackwater River MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Combined Vector, Combined Vector, Combined Vector, All tags... Dorchester, Downloadable Data, Esri Shapefile nan, MD, Maryland, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 3315 Benedict MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Calvert, Charles, Combined Vector, All tags... Combined Vector, Combined Vector, Downloadable Data, Esri Shapefile nan, MD, Maryland, Prince George's, Public Land Survey System, Shapefile, St. Mary's, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 5912 Buckeystown MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Combined Vector, Combined Vector, Combined Vector, All tags... Downloadable Data, Esri Shapefile nan, Frederick, Loudoun, MD, Maryland, Montgomery, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, VA, Virginia, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 27419 Manchester MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Adams, Carroll, Combined Vector, All tags... Combined Vector, Combined Vector, Downloadable Data, Esri Shapefile nan, MD, Maryland, PA, Pennsylvania, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, York, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 2293 Baltimore East MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Baltimore, Combined Vector, Combined Vector, All tags... Combined Vector, Downloadable Data, Esri Shapefile nan, MD, Maryland, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 5120 Boxiron MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Accomack, Combined Vector, Combined Vector, All tags... Combined Vector, Downloadable Data, Esri Shapefile nan, MD, Maryland, Public Land Survey System, Shapefile, Topo Map Vector Data, US, United States, VA, Virginia, Worcester, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 8721 Church Creek MD (published 20231222) Shapefile Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Combined Vector, Combined Vector, Combined Vector, All tags... Dorchester, Downloadable Data, Esri Shapefile nan, MD, Maryland, Public Land Survey System, Shapefile, Talbot, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 71681 Spesutie MD (published 20231222) FileGDB Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Cecil, Combined Vector, Combined Vector, All tags... Combined Vector, Downloadable Data, Esri File GeoDatabase 10, FileGDB, Harford, Kent, MD, Maryland, Public Land Survey System, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 49953 Wye Mills MD (published 20231222) FileGDB Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Combined Vector, Combined Vector, Combined Vector, All tags... Downloadable Data, Esri File GeoDatabase 10, FileGDB, MD, Maryland, Public Land Survey System, Queen Anne's, Talbot, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 20290 Hickman DE (published 20231222) FileGDB Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Caroline, Combined Vector, Combined Vector, All tags... Combined Vector, DE, Delaware, Downloadable Data, Esri File GeoDatabase 10, FileGDB, Kent, MD, Maryland, Public Land Survey System, Sussex, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags USGS Topo Map Vector Data (Vector) 23368 Kenton DE (published 20231222) FileGDB Layers of geospatial data include contours, boundaries, land cover, hydrography, roads, transportation, geographic names, structures, and other selected map features. Types: Citation; Tags: 7.5 x 7.5 minute, 7_5_Min, Caroline, Combined Vector, Combined Vector, All tags... Combined Vector, DE, Delaware, Downloadable Data, Esri File GeoDatabase 10, FileGDB, Kent, MD, Maryland, Public Land Survey System, Queen Anne's, Topo Map Vector Data, US, United States, boundary, contours, geographic names, hydrography, structures, transportation, woodland, Fewer tags 1 2 3 4 5 ... 31 »