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Simulation of Runoff and Infiltration of Disturbed Land

by Ben Chie Yen, Univ of Illinois, Urbana, United States,
Robert Riggins, Univ of Illinois, Urbana, United States,



Document Type: Proceeding Paper

Part of: Irrigation and Drainage: Saving a Threatened Resource?In Search of Solutions

Abstract:

Disturbances of land due to human and natural causes change the porosity and hydraulic conductivity of the soil. A simulation model of conjunctive surface-subsurface flows can be used to investigate the effects of land disturbance on overland runoff and infiltration. The surface flow is mathematically represented by the Saint-Venant equations whereas the subsurface flow is by the Richards equation. Example simulation results confirm that for a disturbed land with loosened soil, runoff will decrease and infiltration will increase as compared to the originally undisturbed situation.

Subject Headings: Runoff | Infiltration | Subsurface flow | Simulation models | Porosity | Mathematical models | Hydraulic models

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