Page Banner

United States Department of Agriculture

Agricultural Research Service

Title: Spatially Variable Hydrodynamic Simulation of Overland Flow

Authors
item Fiedler, F - COLORADO STATE UNIVERSITY
item Ascough, James

Submitted to: Proceedings of American Society of Agricultural Engineers
Publication Type: Proceedings
Publication Acceptance Date: July 11, 1998
Publication Date: N/A

Interpretive Summary: Hortonian overland flow is well defined and predictable at the point scale, but is typically modeled at a much larger scale when deterministically predicting runoff for water use or pollution control purposes. The physical characteristics which control overland flow are spatially variable, however, and large-scale model parameters often do not represent this variability. In this research, measurements and observations made in a semi-arid environment were used characterize the overland flow process and form the basis of a distributed hydrodynamic model. The developed model was then used to explore issues of scale and spatial variability related to infiltration and microtopography. The model compared excellently to several numerical test cases.

Technical Abstract: Hortonian overland flow is well defined and predictable at the point scale, but is typically modeled at a much larger scale when deterministically predicting runoff for water use or pollution control purposes. The physical characteristics which control overland flow are spatially variable, however, and large-scale model parameters often do not represent this variability. In this research, measurements and observations made in a semi-arid environment were used characterize the overland flow process and form the basis of a distributed hydrodynamic model. The developed model was then used to explore issues of scale and spatial variability related to infiltration and microtopography. The model compared excellently to several numerical test cases.

Last Modified: 7/31/2014
Footer Content Back to Top of Page