Filters: partyWithName: U.S. Geological Survey - ScienceBase (X) > Types: Map Service (X) > partyWithName: U.S. Geological Survey, Western Ecological Research Center (X) > partyWithName: Ecosystems (X) > partyWithName: Emily E Perkins (X)

Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Shapefile (1) Types Downloadable (1) OGC WFS Layer (1) OGC WMS Layer (1) Shapefile (1) Contacts Western Ecological Research Center Barbara E Kus Categories Data (1) Tag Types Theme (1) USGS Scientific Topic Keyword (1) Harvest Set (1) Place (1) Tag Schemes ISO 19115 Topic Category (1) USGS Thesaurus (1) Alexandria Digital Library Feature Type Thesaurus (1) Common geographic areas (1) Marine Realms Information Bank (MRIB) keywords (1) View Results as: JSON ATOM CSV

Drainage Areas for Stream Segments in Western San Diego County Drainage areas (or watersheds) were calculated for each stream segment in the National Hydrography Dataset High Resolution Plus Beta (NHD HR Plus Beta) using non-end junction points and the provided hydrologically enforced Digital Elevation Model (DEM). The DEM was used to create a flow direction raster. The pour points used were determined from junction points at each stream intersection excluding stream ends (i.e. channel heads are not included). Watershed calculations were automated using the ArcGIS "watershed" tool and then edited manually for accuracy. In western San Diego County (non-desert) there were 39,980 drainage areas calculated. The percent impervious in each watershed was calculated using the National... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Hydrology, San Diego, USGS Science Data Catalog (SDC), Water Resources, drainage basins, All tags... geoscientificInformation, hydrology, inlandWaters, stream, streamflow, Fewer tags