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Ecological Drainage Units
Dec 17, 2013
(Last modified Jan 13, 2014)
Uploaded by
Emily Granstaff
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- Description:
- Ecological Drainage Units (EDUs) group watersheds that share a common zoogeographic history, physiographic and climatic characteristics, and therefore likely have a distinct set of freshwater assemblages and habitats. EDUs are hypothesized to account for the variability within fish zoogeographic sub-regions due to finer-scale drainage basin boundaries and physiography. EDUs are delineated as groups of 8-digit US Geological Survey Hydrologic Unit watersheds. EDUS were qualitatively defined by the TNC Freshwater Initiative using primarily USFS Fish Zoogeographic Subregions, USFS Ecoregions and Subsections, and major drainage divisions.
- Data Provided By:
- The Nature Conservancy, Mary Davis, Emily Granstaff
- Map Service URL:
- http://sarpdata.net/arcgis/rest/services/River_Classification/Ecological_Drainage_Unit/MapServer
- Content date:
- not specified
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- not specified
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This work is licensed under a Creative Commons Attribution 3.0 License.
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FGDC Standard Metadata XML
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- Dataset Type:
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External Map Service (ArcGIS)
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2 Groups
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5 Public Galleries
http://www.sarpdata.net/temp/RiverClassification/RiverClassificationDec2013.zip
About the Uploader
Emily Granstaff
SARP Cartographer with SARP/USFWS
I work with the Southeast Aquatic Resources Partnership to support the development of regional aquatic habitat assessments and restoration projects in the Southeastern US.
