Two-Dimensional Modeling of Overland Flow

by Khalid B. Marcus, Colorado State Univ, Fort Collins, United States,
Pierre Y. Julien, Colorado State Univ, Fort Collins, United States,



Document Type: Proceeding Paper

Part of: Hydraulics/Hydrology of Arid Lands (H²AL)

Abstract:

Two-dimensional distributed finite element (F-E) and finite difference (F-D) models are developed to simulate storm events on arid watersheds. The F-E model uses the kinematic wave approximation, while the F-D model uses the diffusive wave approximation. Both formulations offer tremendous flexibility in the analysis of surface runoff generated from both stationary and moving storms. In general, F-D models offer more stability than F-E models. Input data can be obtained from a network of raingages or from radar measurements. Several raingages provide ground truth information on precipitation, while radar data describes spatial variability.



Subject Headings: Two-dimensional models | Simulation models | Finite element method | Overland flow | Runoff | Finite difference method | Watersheds

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