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NHD Plus as a geospatial framework for drought indicators

NHD Plus as a geospatial framework for drought indicators. Jim Verdin. A Digital Watershed connects geospatial and temporal water resources data. USGS NWIS Streamflow. Digital Watershed. NHDPlus. NRCS Snotel. NOAA ASOS. NHDPlus.

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NHD Plus as a geospatial framework for drought indicators

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  1. NHD Plus as a geospatial framework for drought indicators Jim Verdin

  2. A Digital Watershed connects geospatial and temporal water resources data USGS NWIS Streamflow Digital Watershed NHDPlus NRCS Snotel NOAA ASOS

  3. NHDPlus • An integrated suite of application-ready, geospatial, surface water data products • A national scale integration of • National Hydrography Dataset (NHD) • 1:100,000 • National Elevation Dataset (NED) • 30 meter resolution • Watershed Boundaries Dataset (WBD) • 1:24,000

  4. National Hydrography Dataset • Medium resolution (1:100,000) NHD used in NHDPlus development

  5. National Elevation Dataset • Used snapshot of 1-arcsecond (30 m) NED http://ned.usgs.gov

  6. Watershed Boundary Dataset http://www.ncgc.nrcs.usda.gov/products/ datasets/watershed/

  7. NHDPlus – What’s Inside? • NHD Feature Classes & Tables • Greatly improved 1:100K National Hydrography Dataset • NED Elevation Grids (1-arc-second) • Additional Components: • Stream Network Value Added Attributes (VAA) • Flow Direction and Flow Accumulation Grids • Elevation-based Reach Catchments • Catchment Attributes • mean annual temperature & precipitation from prism • % of each of the 21 land use classes from 1992 NLCD • Streamline Attributes • min/max elevations • slope • mean annual flow estimates • velocity • Cumulative Upstream Area Attributes for Every Grid Cell • Network Locations of USGS Stream Gaging Stations

  8. Network Locations of USGS Stream Gages Gage ID: 09334500 Station Name: White Canyon Near Hanksville, UT Reach Code: 150004001602 Drainage Area: 276 sq. mi. Maximum Flow: 1,370 cfs Average Flow: 5.1 cfs Plus other info from NWIS

  9. Upstream trace above point of interest

  10. Network Locations of USGS Stream Gages

  11. Interactive drought index composition • Pick and choose among potential drought index location points • Generate tributary area • Pick and choose among stations and reservoirs in tributary area • Link to CUAHSI HIS observation data for stations and reservoirs • Calculate index and evaluate results • Iterate as desired

  12. Questions?

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