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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Jacob H LaFontaine Karen L Mckee Bradford Butman GS ScienceBase U.S. Geological Survey More... Categories Data (1) Tag Types Theme (9) Place (1) Tags (with Scheme=USGS) bulk density (1) mangrove (1) model (1) navigational data (1) salinity (1) sea-level rise (1) streamflow (1) More... View Results as: JSON ATOM CSV

GIS Features Used With the Precipitation Runoff Modeling System for Hydrologic Simulations of the Southeastern United States The hydrologic response units (HRUs) and stream segments available here are for an application of the Precipitation Runoff Modeling System (PRMS) in the southeastern United States by LaFontaine and others (2019). Geographic Information System (GIS) files for the HRUs and stream segments are provided as shapefiles with attribute hru_id_1 identifying the HRU numbering convention used in the PRMS model and seg_id_gcp identifying the stream segment numbering convention used in the PRMS model. This GIS files represent the watershed area for an approximately 1.16 million square kilometer area of the southeastern United States. A total of 20,251 HRUs and 10,742 stream segments are used in this modeling application. LaFontaine,... Types: Citation; Tags: United States, biota, model, streamflow, streamflow modeling Tracklines of a multibeam survey of the sea floor of the Atlantic Beach artificial reef (polyline shapefile, geographic, WGS 84) The Atlantic Beach artificial reef, located on the sea floor 3 nautical miles south of Atlantic Beach, New York in about 20 meters water depth, was built to create habitat for marine life. The reef was originally created by placing heavy materials such as tires, automobile bodies and other vehicles, barges, and rock from a dredging project on the sea floor. In 2000, the U.S. Geological Survey surveyed the area using a Simrad EM1000 multibeam echosounder mounted on the Canadian Coast Guard (CCG) ship Frederick G. Creed. The purpose of this multibeam survey, done in cooperation with the U.S. Army Corps of Engineers when the Creed was in the New York region in April 2000, was to map the bathymetry and backscatter intensity... Types: Citation; Tags: Atlantic Beach artificial reef, Middle Atlantic Bight, New Jersey, New York, New York Bight, All tags... North Atlantic Ocean, location, marine geophysics, mid-Atlantic Bight, multibeam, navigational data, oceans, polyline shapefile, sea floor mapping, tracklines, Fewer tags Will fluctuations in salt marsh - mangrove dominance alter vulnerability of a subtropical wetland to sea-level rise? To avoid submergence during sea-level rise, coastal wetlands build soil surfaces vertically through accumulation of inorganic sediment and organic matter. At climatic boundaries where mangroves are expanding and replacing salt marsh, wetland capacity to respond to sea-level rise may change. To compare how well mangroves and salt marshes accommodate sea-level rise, we conducted a manipulative field experiment in a subtropical plant community in the rapidly subsiding Mississippi River Delta. Experimental plots were established in spatially equivalent positions along creek banks in monospecific stands of Spartina alterniflora (smooth cordgrass) or Avicennia germinans (black mangrove) and in mixed stands containing... Categories: Data; Types: Citation; Tags: Ecology, Geomorphology, Louisiana, Port Fourchon, USGS Science Data Catalog (SDC), All tags... accretion, bulk density, disturbance, elevation change, mangrove, mangrove, salinity, salt marshes, sea-level rise, subsidence, sulfides, water pH, Fewer tags