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Data Sources for GIS in Water Resources
(Courtesy of David R. Maidment, David G. Tarboton and Ayse Irmak)
Google Earth http://earth.google.com/
USGS GIS data for Waterhttp://water.usgs.gov/maps.html
Watersheds of the US
2-digit water resource regions 8-digit HUC watersheds
Hydrologic Unit Code Watersheds
~ 2000 for US, about the size of counties
Watershed Hierarchy
8 HUC
4
2
6
NHDPlus
1012
Available In Progress
Digit #
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
EPA River Reach File 1 (RF1)
Sta
te a
nd
Loc
al D
ata
Sta
te a
nd
Loc
al D
ata
DecisionsDecisions
Watershed Management
.
TMDL.
Source Water Protection
.Stormwater
DecisionsDecisions
Watershed Management
.
TMDL.
Source Water Protection
.Stormwater
DataDataCartographicCartographic
MonitoringMonitoring
LoadingsLoadings
DataDataCartographicCartographic
MonitoringMonitoring
LoadingsLoadings
ModelsModels HSPF - NPSMHSPF - NPSM
QUAL2EQUAL2E
TOXIROUTETOXIROUTE
Post-ProcessorsPost-Processors
ModelsModels HSPF - NPSMHSPF - NPSM
QUAL2EQUAL2E
TOXIROUTETOXIROUTE
Post-ProcessorsPost-Processors
ToolsToolsTargetTarget
AssessmentAssessment
Data MiningData Mining
ReportingReporting
ToolsToolsTargetTarget
AssessmentAssessment
Data MiningData Mining
ReportingReporting
BASINSBASINS - Integrating GIS and Water Quality ModelingTarget
Assess
DM
River networksfor 8-digit HUC watersheds
http://nhd.usgs.gov/
Lower West Fork, Trinity River BasinHUC = 12030102
NHD River Reaches
412 River ReachesIn Upper West Fork of Trinity Basin
River Reach CodesUsed for river address locations
ReachCode = 12030102000151
ReachCode = 12030102000005
HUC# Segment# Location 0.392on Reach
12030102000005
http://www.horizon-systems.com/nhdplus/
NHDPlus for a Portion of Oregon
http://www.horizon-systems.com/nhdplus/
NHDPlus Reach Catchments ~ 3km2
About 1000 reach catchments in each 8-digit HUC
Average reach length = 2km 2.3 million reaches for continental US
NHDPlus Reach Attributes
• Slope• Elevation• Mean annual flow
– Corresponding velocity
• Drainage area• % of upstream drainage
area in different land uses
• Stream order
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://gisdata.usgs.net/ned/
Digital Elevation Model (DEM)
Contours
720
700
680
740
680700720740
720 720
Austin West 30 Meter DEM
32
16
8
64
4
128
1
2
Eight Direction Pour Point Model
Water flows in the direction of steepest descent
Flow Direction Grid
32
16
8
64
4
128
1
2
Delineation of Streams and Watersheds on a DEM
http://www.ngdc.noaa.gov/mgg/shorelines/shorelines.html
http://www.ncgc.nrcs.usda.gov/products/datasets/statsgo/
1:250,000 Scale Soil Information
http://www.ncgc.nrcs.usda.gov/products/datasets/ssurgo/
1:24,000 scalesoil information
SSURGO:County Level Digital Soil Maps
National Land Cover Datasethttp://landcover.usgs.gov/nationallandcover.html
http://seamless.usgs.gov/Get the data:
Hydrologic Landscape Regions
USGS Characterization of nature of soil and groundwater systems
http://water.usgs.gov/lookup/getspatial?hlrus
http://www.ncdc.noaa.gov/oa/ncdc.html
PRISM Mean Annual Precipitation
http://www.wcc.nrcs.usda.gov/climate/prism.html
http://www.daymet.org/
National Water Information System
Web access to USGS water resources data in real time
http://waterdata.usgs.gov/usa/nwis/
USGS Water Watch
Web access to USGS water resources data in real timehttp://waterdata.usgs.gov/nwis/rt
USGS National Water Information System.• Real-time and Historic Data
– Streamflow and stage– Groundwater levels– Water Quality– Site information
• Tabular or Graphical Format
http://srtm.usgs.gov/
http://www.geographynetwork.com/
http://www.maproom.psu.edu/dcw/
1:1,000,000 scale vector data for the world
GTOPO30 - 1 km Digital Elevation Model of the Earth
http://edcdaac.usgs.gov/gtopo30/gtopo30.html
Drainage in North America
http://edcdaac.usgs.gov/gtopo30/hydro/index.html
Hydro1K isderived fromGTOPO30using raster GIS analysis
NASA Satellite Data
http://edcimswww.cr.usgs.gov/pub/imswelcome/
Global Energy and Water Experiment
http://www.gewex.org/
http://maps.utah.gov/
http://www.wrcc.dri.edu/
http://www.wcc.nrcs.usda.gov/snotel/
http://www.dnr.ne.gov/databank/geospatial.html
“National Map” in Nebraska
http://nmviewogc.cr.usgs.gov/viewer.htm?bbox=-104.5,39.5,-95,43.5