Data%20Sources%20for%20GIS%20in%20Water%20Resources

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Data Sources for GIS in Water Resources
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National Hydro Data Programs
National Elevation Dataset (NED)
National Hydrography Dataset (NHD)
Watershed Boundary Dataset
NED-Hydrology
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Watersheds of the US
2-digit water resource regions
8-digit HUC watersheds
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Hydrologic Unit Code Watersheds
2000 for US, about the size of counties
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Watershed Hierarchy
Digit
2
4
6
8 HUC
10
12
EDNA
Available
In Progress
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Watershed Boundary Dataset

• National Program by USGS and USDA (NRCS)
• Boundaries for 10- and 12- digit watersheds
• First cut is by automated delineation from NED
• Hand checked and edited

10-digit watersheds
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EPA River Reach File 1 (RF1)
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BASINS - Integrating GIS and Water Quality
Modeling
Data Cartographic Monitoring
Loadings

• Models
• HSPF - NPSM
• QUAL2E
• TOXIROUTE

Tools Target Assessment Data
Mining Reporting
Target
Assess
DM
Decisions Watershed Management . TMDL .
Source Water Protection . Stormwater
State and Local Data
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National Hydro Data Programs
National Elevation Dataset (NED)
National Hydrography Dataset (NHD)
Watershed Boundary Dataset
NED-Hydrology
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River networks for 8-digit HUC watersheds
http//nhd.usgs.gov/
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NHD River Reaches
412 River Reaches In Upper West Fork of Trinity
Basin
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River Reach CodesUsed for river address locations
ReachCode 12030102000151
ReachCode 12030102000005
Location 0.392 on Reach 12030102000005
Segment
HUC
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National Elevation Dataset
http//gisdata.usgs.net/ned/

• Digital Elevation Model with 1 arc-second (30m)
  cells
• Seamless in 1 blocks for the United States
• 10 billion data
• Derived from USGS 124,000 quadrangle sheets

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Digital Elevation Model (DEM)
720
720
Contours
740
720
700
680
680
700
720
740
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Austin West 30 Meter DEM
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Eight Direction Pour Point Model
Water flows in the direction of steepest descent
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Flow Direction Grid
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Cell to Cell Grid Network Through the Landscape
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Delineation of Streams and Watersheds on a DEM
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• National program by USGS and NWS
• 5000 cell threshold on a 30m DEM ( 8 km2 average
  drainage area)
• 1 million catchments for US when completed
• Being used for flash flood warning by NWS

http//edna.usgs.gov/
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http//www.ngdc.noaa.gov/mgg/shorelines/shorelines
.html
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1250,000 Scale Soil Information
http//www.ncgc.nrcs.usda.gov/branch/ssb/products/
statsgo/
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124,000 scale soil information
County Level Digital Soil Maps
http//www.ncgc.nrcs.usda.gov/branch/ssb/products/
ssurgo/data/
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National Land Cover Dataset
http//landcover.usgs.gov/nationallandcover.html
http//seamless.usgs.gov/
Get the data
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Hydrologic Landscape Regions
USGS Characterization of nature of soil and
groundwater systems
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PRISM Mean Annual Precipitation
http//www.wcc.nrcs.usda.gov/climate/prism.html
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http//www.ncdc.noaa.gov/oa/ncdc.html
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National Water Information System
Web access to USGS water resources data in real
time
http//waterdata.usgs.gov/usa/nwis/
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USGS Water Watch
Web access to USGS water resources data in real
time
http//waterdata.usgs.gov/nwis/rt
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USGS National Water Information System.

• Real-time and Historic Data
• Streamflow and stage
• Groundwater levels
• Water Quality
• Site information
• Tabular or Graphical Format

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http//www.geographynetwork.com/
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GTOPO30 - 1 km Digital Elevation Model of the
Earth
http//edcdaac.usgs.gov/gtopo30/gtopo30.html
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Drainage in North America
Hydro1K is derived from GTOPO30 using raster GIS
analysis
http//edcdaac.usgs.gov/gtopo30/hydro/index.html
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http//srtm.usgs.gov/
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NASA Satellite Data
http//edcimswww.cr.usgs.gov/pub/imswelcome/
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Global Energy and Water Experiment
http//www.gewex.org/
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