1Contractor for the USGS at the EROS Data Center
NHD Plus as a geospatial framework for drought
indicators
Jim Verdin
2Contractor for the USGS at the EROS Data Center
Digital Watershed
NHDPlus
NOAA ASOS
USGS NWIS Streamflow
A Digital Watershed connects geospatial and temporal water
resources data
NRCSSnotel
3Contractor for the USGS at the EROS Data Center
NHDPlus
An integrated suite of application-ready, geospatial, surface water data products
A national scale integration ofNational Hydrography Dataset (NHD)
1:100,000National Elevation Dataset (NED)
30 meter resolutionWatershed Boundaries Dataset (WBD)
1:24,000
4Contractor for the USGS at the EROS Data Center
National Hydrography Dataset Medium resolution (1:100,000) NHD used in NHDPlus development
5Contractor for the USGS at the EROS Data Center
National Elevation Dataset Used snapshot of 1-arcsecond (30 m) NED
http://ned.usgs.gov
6Contractor for the USGS at the EROS Data Center
Watershed Boundary Dataset
http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/
7Contractor for the USGS at the EROS Data Center
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
8Contractor for the USGS at the EROS Data Center
Network Locations of USGS Stream Gages
Gage ID: 09334500Station Name: White Canyon Near Hanksville, UTReach Code: 150004001602Drainage Area: 276 sq. mi.Maximum Flow: 1,370 cfsAverage Flow: 5.1 cfs
Plus other info from NWIS
9Contractor for the USGS at the EROS Data Center
Upstream trace above point of interest
10Contractor for the USGS at the EROS Data Center
11Contractor for the USGS at the EROS Data Center
Network Locations of USGS Stream Gages
12Contractor for the USGS at the EROS Data Center
Interactive drought index composition
Pick and choose among potential drought index location pointsGenerate 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 resultsIterate as desired
13Contractor for the USGS at the EROS Data Center
Questions?