A comprehensive model has been developed for use in modeling the hydrologic response of rill network systems. The model, which is called HYMODRIN, is composed of both a hydrologic runoff component and a hydraulic channel routing component. The hydrologic component of the model uses a Green Ampt infiltration approach linked with a nonlinear reservoir runoff model. The channel routing component of the model is baaed on a finite element solution of the diffusion wave equations. In order to account for backwater effects the model employs a dual level iteration scheme.
The model may be used in either a stand alone mode or as part of a comprehensive integrated rill erosion model. In the latter case, the hydrologic data for the rill network and the associated interrill flow areas is provided by a geographic-hydrologic interface model called GHIM. This model accepts data from a digital elevation model and translates it into a form compatible with the hydrologic model.
This report contains the theoretical development and operating instructions for both GHIM and HYMODRIN. Computer listings for both programs are provided.
Digital Object Identifier (DOI)
Final Report from University of Kentucky to U.S. Geological Survey Matching Grant No. 14-08-001-G1147 entitled "Hydrology and Sedimentology of a Dynamic Rill Network".
The contents of this report were developed under a grant from the Department of the Interior, U.S. Geological Survey.
Ormsbee, Lindell E.; Blandford, George E.; Montgomery, John S.; Terrell, Laura B.; Barfield, Billy J.; and Storm, Daniel E., "Hydrology and Sedimentology of Dynamic Rill Networks Volume II: Hydrologic Model for Dynamic Rill Networks" (1990). KWRRI Research Reports. 28.