Download - geodata
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Data Sources for GIS in Water Resources
by David R. Maidment, David G. Tarboton
and Ayse Irmak
GIS in Water ResourcesFall 2010
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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
8 HUC
4
2
6
NHDPlus
1012
Available In Progress
Digit #
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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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Watershed Boundary DataSethttp://www.ncgc.nrcs.usda.gov/products/datasets/watershed/
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WBD for Nebraska2990 HUC12 watersheds of average area 39.3 square miles
HUC12:HUC ~ 40:1 watersheds
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EPA River Reach File 1 (RF1)
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Sta
te a
nd
Loc
al D
ata
Sta
te a
nd
Loc
al D
ata
Decisions
Watershed Management
.
TMDL.
Source Water Protection
.Stormwater
Decisions
Watershed Management
.
TMDL.
Source Water Protection
.Stormwater
DataCartographic
Monitoring
Loadings
DataCartographic
Monitoring
Loadings
Models HSPF - NPSM
QUAL2E
TOXIROUTE
Post-Processors
Models HSPF - NPSM
QUAL2E
TOXIROUTE
Post-Processors
ToolsTarget
Assessment
Data Mining
Reporting
ToolsTarget
Assessment
Data Mining
Reporting
BASINS - Integrating GIS and Water Quality ModelingTarget
Assess
DM
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River networksfor 8-digit HUC watersheds
http://nhd.usgs.gov/
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Lower West Fork, Trinity River BasinHUC = 12030102
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NHD River Reaches
412 River ReachesIn Upper West Fork of Trinity Basin
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River Reach CodesUsed for river address locations
ReachCode = 12030102000151
ReachCode = 12030102000005
HUC# Segment# Location 0.392on Reach
12030102000005
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http://www.horizon-systems.com/nhdplus/
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NHDPlus for a Portion of Oregon
http://www.horizon-systems.com/nhdplus/
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NHDPlus Reach Catchments ~ 3km2
About 1000 reach catchments in each 8-digit HUC
Average reach length = 2km 2.3 million reaches for continental US
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NHDPlus Reach Attributes
• Slope• Elevation• Mean annual flow
– Corresponding velocity
• Drainage area• % of upstream
drainage area in different land uses
• Stream order
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National Elevation Dataset
• Digital Elevation Model with 1 arc-second (30m) cells
• Seamless in 1° blocks for the United States• 10 billion data• Derived from USGS 1:24,000 quadrangle
sheets
http://seamless.usgs.gov/Get the data:
http://ned.usgs.gov/
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Digital Elevation Model (DEM)
Contours
720
700
680
740
680700720740
720 720
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Austin West 30 Meter DEM
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32
16
8
64
4
128
1
2
Eight Direction Pour Point Model
Water flows in the direction of steepest descent
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Flow Direction Grid
32
16
8
64
4
128
1
2
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Delineation of Streams and Watersheds on a DEM
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http://www.ngdc.noaa.gov/mgg/shorelines/shorelines.html
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http://www.ncgc.nrcs.usda.gov/products/datasets/statsgo/
1:250,000 Scale Soil Information
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http://www.ncgc.nrcs.usda.gov/products/datasets/ssurgo/
1:24,000 scalesoil information
SSURGO:County Level Digital Soil Maps
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Ssurgo for Travis County
103 soil map units described by 7530 polygons of average area 35.37 ha (87 acres)
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http://landcover.usgs.gov/
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National Land Cover Dataset
http://seamless.usgs.gov/Get the data:
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http://www.nationalatlas.gov/atlasftp.html
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http://www.ncdc.noaa.gov/oa/ncdc.html
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PRISM Mean Annual Precipitation
http://www.wcc.nrcs.usda.gov/climate/prism.html
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http://www.daymet.org/
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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 timehttp://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://srtm.usgs.gov/
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HydroSheds derived from SRTM
http://hydrosheds.cr.usgs.gov/
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http://www.maproom.psu.edu/dcw/
1:1,000,000 scale vector data for the world
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GTOPO30 - 1 km Digital Elevation Model of the Earth
http://eros.usgs.gov/#/Find_Data/Products_and_Data_Available/GTOPO30
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Drainage in North America
Hydro1K isderived fromGTOPO30using raster GIS analysis
http://eros.usgs.gov/#/Find_Data/Products_and_Data_Available/gtopo30/hydro
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NASA Satellite Data
https://lpdaac.usgs.gov/
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Global Energy and Water Experiment
http://www.gewex.org/
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http://maps.utah.gov/
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http://www.wrcc.dri.edu/
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http://www.wcc.nrcs.usda.gov/snotel/
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http://www.dnr.ne.gov/databank/geospatial.html
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“National Map” in Nebraska
http://nmviewogc.cr.usgs.gov/viewer.htm?bbox=-104.5,39.5,-95,43.5