ABSTRACT
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Indexed by Title
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 Preparation of DEMs for Use in Environmental Modeling Analysis
Track:  Water Resources
Author:   William Saunders

Digital elevation models are being employed with increased frequency in the pursuit of watershed-based approaches for water resources studies and assessments. Accuracy in digital replication of receiving stream networks and watershed boundaries is of utmost importance, particularly in cases where mathematical models may be linked to the DEM-derived output. Depending on the map scale of the DEM utilized, certain hydrologic features of a watershed may become obscured or oversimplified. The integration of a vector hydrography layer into the DEM prior to watershed delineation is one method that can correct for this loss of detail. This method is commonly referred to as "stream burning" and several such techniques are presented and discussed.

William Saunders
Texas Natural Resource Conservation Commission
12100 Park 35 Circle
Austin, TX78753

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