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Data Sources for GIS in Water Resources by David R. Maidment and David G. Tarboton GIS in Water Resources Fall 2007. http://www.geodata.gov/. http://www.geodata.gov/. Google Earth http://earth.google.com/. USGS GIS data for Water. http://water.usgs.gov/maps.html. Watersheds of the US. - PowerPoint PPT PresentationTRANSCRIPT
Data Sources for GIS in Water Resources
by David R. Maidment and David G. Tarboton
GIS in Water ResourcesFall 2007
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
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 Reach CodesUsed for river address locations
ReachCode = 12030102000151
ReachCode = 12030102000005
HUC# Segment# Location 0.392on Reach
12030102000005
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/
32
16
8
64
4
128
1
2
Eight Direction Pour Point Model
Water flows in the direction of steepest descent
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
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
Drainage in North America
http://edcdaac.usgs.gov/gtopo30/hydro/index.html
Hydro1K isderived fromGTOPO30using raster GIS analysis