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Filters Date Types (for Date Range) Extensions ArcGIS Service Definition (1) Shapefile (1) Types Map Service (2) OGC WMS Layer (2) ArcGIS REST Map Service (1) ArcGIS Service Definition (1) Downloadable (1) OGC WMS Service (1) Shapefile (1) Contacts Philip T Harte U.S. Geological Survey Cynthia D Miller-Corbett U.S. Geological Survey, Northeast Region National Geospatial Technical Operations Center More... Categories Data (2) Data Release - In Progress (1) Tag Types Place (2) Theme (2) Harvest Set (1) USGS Scientific Topic Keyword (1) Tag Schemes None (1) Geographic Areas (1) USGS Thesaurus (1) ISO 19115 Topic Category (1) View Results as: JSON ATOM CSV

Linear-referenced Geomorphology and Relative Vulnerability to Erosion at the 2013 – 2014 conterminous U.S. Atlantic Ocean National Hydrography Dataset Coastline Coastal Mean High Water (MHW) is contoured in intertidal zones open to oceans, behind barrier coasts in bays, lagoons, and estuaries, and sometimes where tidal currents reach upstream (landward) of the embayed foreshore water bodies. In the National Geospatial Program (NGP), surface water hydrography is maintained in the National Hydrography Dataset (NHD) Flowline Network projects Mean High Water level (MHW) as the linear-referenced 1:24,000-scale resolution NHD Coastline (http://nhd.usgs.gov/). NHDCoastline Geomorphology and associated Risk line-event feature classes that rank the relative risk of horizontal erosion on a scale of 1 to 5 (least to most risk, respectively) have been developed using the Hydrography... Categories: Data, Data Release - In Progress; Types: ArcGIS REST Map Service, ArcGIS Service Definition, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Atlantic, Connecticut, Delaware, Florida, Geomorphology, All tags... Georgia, HEM, Hydro linked data, Hydrographically linked data, Hydrologically linked data, Linear-referenced, Linked data, Maine, Maryland, Massachusetts, Mean High Water, Mid-Atlantic, NHD, National Hydrography Dataset, New England, New Hampshire, New Jersey, New York, North Carolina, Rhode Island, Risk, South Atlantic, South Carolina, Virginia, barrier coast, coast, conterminous US, estuary, intertidal, line-event, Fewer tags Experimental testing for radon in laboratory and field using a coupled diffusive membrane and alpha track detector, 2024 Information on radon occurrence in groundwater systems is important to assess risks from radon exposure. For this study we developed a novel passive method to measure for dissolved radon in groundwater using a coupled diffusive membrane encasing an alpha track (AT) detector. The membrane is gas permeable but water impermeable, which allows for the deployment of AT detectors in aqueous environments. The alpha track (AT) detectors measure the alpha decay of radon as it etches a film seated in the AT. Empirical relations have been developed to convert the etches or tracks from the film of the detectors to a radon concentration. Encasing the AT detectors in a membrane (called MAT detectors) prevents water from deteriorating... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Arizona, Hydrology, Hydrology, Massachusetts, Passive Samplers, All tags... Radon, USGS Science Data Catalog (SDC), Washington, biota, Fewer tags