Skip to main content
ARS Home » Research » Publications at this Location » Publication #64870
Title: DIGITAL LANDSCAPE PARAMETERIZATION FOR HYDROLOGIC APPLICATIONS.

Author
item Garbrecht, Jurgen
item MARTZ, LAWRENCE - UNIV. OF SASKATCHEWAN

Submitted to: Proceedings of the Hydro GIS 96 Conference
Publication Type: Proceedings
Publication Acceptance Date: 4/1/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary: The evaluation of the shape and form of a landscape has recently been automated by use of computer technology. The methods that were used to determine runoff over the landscape have several weaknesses that limit their application. This paper proposes improvements in the determination of the runoff over flat areas, addresses the identification of landscape features, and determines width, length, and slope measurements of the subcatchments. These proposed improvements and additions greatly speed up computer modeling of the runoff and provide more precise and reproducible determinations than traditional manual techniques

Technical Abstract: Several advances in automated landscape parameterization from DEMs for hydrologic applications are presented. The parameterization procedures address the treatment of depressions and flat areas in DEM, the indexing channel links in raster generated drainage networks, the sequencing of channel links for forward-marching flow routing schemes, and the parameterization of Wooding-type subcatchments. The advances result in improved drainage definition and in a more accurate network and subcatchment parameterization.