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Watershed Hydrograph Simulation Through Dendritic Channel Networks

by G. W. Choi, Colorado State Univ, United States,
A. Molinas, Colorado State Univ, United States,



Document Type: Proceeding Paper

Part of: Watershed Planning and Analysis in Action

Abstract:

In this paper, a linear dendritic simulation model based on the finite difference implicit scheme is presented. In this model, a dendritic matrix solution algorithm for simultaneous solution of continuity, momentum and channel junction equations is introduced. This algorithm is based on the commonly accepted Gaussian elimination method. The dendritic simulation model produces a more refined runoff hydrograph simulation compared to the sequential simulation models. In the paper, an example application of the model to a simple network of channels is also given. Runoff discharge and lag time are used to compare the sequential simulations using kinematic and full dynamic wave equations with the dendritic simulation which uses the present algorithm. The dendritic simulation algorithm developed in this paper is shown to provide a more refined flood routing through channel networks in complex watersheds.

Subject Headings: Simulation models | Flood routing | Hydrologic models | Channels (waterway) | Watersheds | Algorithms | Runoff

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