HR: 1330h
AN: H42D-1111    [PDF]
TI: A Physical, Mechanistic and Fully Coupled Hillslope Hydrology Model
AU: * Raff, D A
EM: draff@do.usbr.gov
AF: US Bureau of Reclamation, D-8530 PO Box 25007, Denver, CO 80225
AU: Ramirez, J A
EM: ramirez@engr.colostate.edu
AF: Colorado State University, Dept. of Civil Engineering, Ft. Collins, CO 80523
AB: We present the mathematical and numerical development of a new hillslope hydrology model as well as validation and sample applications. The new model is a distributed, physically and mechanistically based hillslope hydrology model. The model couples the fully two-dimensional hydrodynamic equations for overland flow, Richards equation for infiltration, and a set of sediment detachment and transport equations. This model, based on the fundamental physics of the governing processes of hillslope hydrology is used to test our ability to fully explain the fine scale processes and mechanisms leading to the development of erosion drainage networks . Three sample applications are presented to show how the model is capable of capturing the interaction between overland flow, erosion and infiltration at very small scales and of modeling the evolution of hillslope caused by spatially variable erosion caused by small scale variability of the hydraulic and soil properties. We also present analyses with respect to energy expenditure during hillslope evolution.
DE: 1815 Erosion and sedimentation
DE: 1878 Water/energy interactions
SC: Hydrology [H]
MN: 2003 Fall Meeting