Data Sources for GIS in Water Resources by David R. Maidment, David G. Tarboton and Ayse Irmak GIS in Water Resources Fall 2009

Google Earth

USGS GIS data for Water

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 NHDPlus 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

Watershed Boundary DataSet

WBD for Nebraska 2990 HUC12 watersheds of average area 39.3 square miles HUC12:HUC ~ 40:1 watersheds

EPA River Reach File 1 (RF1)

State and Local Data Decisions Watershed Management. TMDL. Source Water Protection. StormwaterDecisions Watershed Management. TMDL. Source Water Protection. Stormwater DataCartographic Monitoring MonitoringLoadingsDataCartographic LoadingsModels HSPF - NPSM HSPF - NPSM QUAL2E QUAL2E TOXIROUTE TOXIROUTEPost-ProcessorsModels HSPF - NPSM HSPF - NPSM QUAL2E QUAL2E TOXIROUTE TOXIROUTEPost-ProcessorsToolsTargetAssessment Data Mining ReportingToolsTargetAssessment Reporting BASINS BASINS - Integrating GIS and Water Quality Modeling Target Assess DM

River networks for 8-digit HUC watersheds

Lower West Fork, Trinity River Basin HUC =

NHD River Reaches 412 River Reaches In Upper West Fork of Trinity Basin

River Reach Codes Used for river address locations ReachCode = ReachCode = HUC# Segment# Location on Reach

NHDPlus for a Portion of Oregon

NHDPlus Reach Catchments ~ 3km 2 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

Requires a login and password to get dam information

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 the data:

Digital Elevation Model (DEM) Contours

Austin West 30 Meter DEM

Eight Direction Pour Point Model Water flows in the direction of steepest descent

Flow Direction Grid

Delineation of Streams and Watersheds on a DEM

1:250,000 Scale Soil Information

1:24,000 scale soil information SSURGO: County Level Digital Soil Maps

National Land Cover Dataset the data:

Hydrologic Landscape Regions USGS Characterization of nature of soil and groundwater systems

PRISM Mean Annual Precipitation

National Water Information System Web access to USGS water resources data in real time

USGS Water Watch Web access to USGS water resources data in real time

USGS National Water Information System. Real-time and Historic Data –Streamflow and stage –Groundwater levels –Water Quality –Site information Tabular or Graphical Format

1:1,000,000 scale vector data for the world

GTOPO km Digital Elevation Model of the Earth

Drainage in North America Hydro1K is derived from GTOPO30 using raster GIS analysis

NASA Satellite Data

Global Energy and Water Experiment

“National Map” in Nebraska