Data Sources for GIS in Water Resources

by David R. Maidment and David G. Tarboton

GIS in Water ResourcesFall 2005

http://www.geodata.gov/gos

Geospatial One-Stop

Google Earthhttp://earth.google.com/

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

EDNA

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

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

• 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/

http://www.ngdc.noaa.gov/mgg/shorelines/shorelines.html

http://www.ncgc.nrcs.usda.gov/products/datasets/statsgo/

1:250,000 Scale Soil Information

County Level Digital Soil Maps

1:24,000 scalesoil information

http://www.ncgc.nrcs.usda.gov/products/datasets/ssurgo/

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://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/

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/