Toby L Welborn

The U.S. Geological Survey (USGS) worked in cooperation with the Federal Emergency Management Agency (FEMA) to document the August and September, 2017 Hurricane Harvey storm event in southeastern Texas and southwestern Louisiana. Hurricane Harvey was the most significant rainfall event in United States history in scope and rainfall totals since rainfall records began during the 1880s. From August 25 through September 1, 2017, some areas in southeastern Texas received more than 60 inches of rain; large areas received more than 40 inches of rain. This data release contains the flood inundation polygons, flood-depth rasters, mapped boundaries, and high-water mark (HWM) locations for the selected river basins, coastal...

Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: USGS Science Data Catalog (SDC), Water Resources

Brazos River

Hurricane Harvey made landfall near Rockport, Texas on August 25 as a category 4 hurricane with wind gusts exceeding 150 miles per hour. As Harvey moved inland the forward motion of the storm slowed down and produced tremendous rainfall amounts to southeastern Texas and southwestern Louisiana. Historic flooding occurred in Texas and Louisiana as a result of the widespread, heavy rainfall over an 8-day period in Louisiana in August and September 2017. Following the storm event, U.S. Geological Survey (USGS) hydrographers recovered and documented 2,123 high-water marks in Texas, noting location and height of the water above land surface. Many of these high-water marks were used to create flood-inundation maps for...

Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Austin County, Bellville, Bessies Creek, Booth, Brazoria County, All tags... Brazos River River, Burleigh, Fort Bend County, Fulshear, Houston, Mill Creek, Pattison, Richmond, Rosenberg, San Felipe, Simonton, Texas, Thompsons, Waller County, Weston Lakes, depth, extent, flood, flood inundation mapping, high-water marks, inland Waters, Fewer tags

Groundwater divide line, spring 1972, Smith Valley, Nevada

This dataset consists of a polyline representing a groundwater divide for spring 1972, Smith Valley, Nevada digitized from plate 2 of the 1976 publication: Rush, F.E.,and Schroer, C.V., 1976, Geohydrology of Smith Valley, Nevada with special reference to the water-use period 1953-72: Nevada Department of Conservation and Natural Resources Water Resources Bulletin 43, 43p.

Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Basin 107, Hydrographic Basin 9, Nevada, Smith Valley, Walker River, All tags... Walker River Basin, groundwater, groundwater divide, groundwater level, hydrology, inlandWaters, water-level, Fewer tags

Scan Origins for a Terrestrial Laser Scanner Survey in Grapevine Canyon Near Scotty's Castle, Death Valley National Park, California

This point shapefile represents 38 terrestrial laser scanner (TLS) survey scan locations collected by single-base real-time kinematic (RTK) global navigation satellite system (GNSS) surveys in Grapevine Canyon near Scotty's Castle, Death Valley National Park, from July 12-14, 2016. Data were collected by two Topcon GR-3 GNSS receivers at one-second intervals for three minutes for each location.

Tags: California, Death Valley, Death Valley National Park, Grapevine Canyon, LiDAR, All tags... Nevada, Scotty's Castle, T-LiDAR, flood, flood-inundation maps, flooding, inlandWaters, mathematical modeling, stationary scanning, streamflow, surface water (non-marine), terrestrial laser scanning, Fewer tags

Flood-Inundation Areas in Grapevine Canyon Near Scotty's Castle, Death Valley National Park, California

This polygon shapefile represents estimated flood-inundation areas in Grapevine Canyon near Scotty's Castle, Death Valley National Park. Estimates of the 4, 2, 1, 0.5, and 0.2 percent annual exceedance probability (AEP) flood streamflows (previously known as the 25, 50, 100, 250, and 500-year floods) were computed from regional flood regression equations. The estimated flood streamflows were used with one-dimensional hydraulic models to compute water surface elevations that were mapped on a digital terrain model of the study area. Those locations where the water surface was higher than the land surface were defined as inundated. The inundation polygons are named by AEP flow (4, 2, 1, 0.5, 0.2-percent) and geometry...

Tags: California, Death Valley, Death Valley National Park, Grapevine Canyon, LiDAR, All tags... Nevada, Scotty's Castle, T-LiDAR, flood, flood-inundation maps, flooding, inlandWaters, mathematical modeling, stationary scanning, streamflow, surface water (non-marine), terrestrial laser scanning, Fewer tags