David G Tarboton1, Kiran K Chinnayakanahalli1,
Daniel P Ames1, Ross Woods2
1. Utah State University
2. NIWA, New Zealand
Abstract of Presentation at AWRA/UCOWR speciality conference on "Decision Support Systems for Water Resources Management" - June 26 - 30, 2001 - Snowbird, Utah. [Powerpoint]
This paper describes a GIS tool to facilitate the computation of input
parameters for TOPNET. TOPNET is a TOPMODEL based hydrologic
modeling system that includes saturation and infiltration excess runoff
generation processes, interception, evapotranspiration, precipitation interpolation
and kinematic wave routing in channels. The GIS based TOPSETUP tool
includes objective digital elevation model based channel network delineation
and estimation of topographic and geomorphologic parameters from the digital
elevation model. The GIS implementation facilitates the estimation
of other parameters from GIS information about soils and vegetation where
this is readily available, such as in national databases. Model elements
are subwatersheds automatically extracted based upon the channel network
extracted from the digital elevation model at a user controlled scale.
Model element parameters are linked to GIS information averaged over each
subwatershed. The software described is available from http://hydrology.usu.edu/dtarb/.