Flood Travel Time

by James Chwen-Yuan Guo, Univ of Colorado at Denver, Dep of, Civil Engineering, Denver, CO, USA,



Document Type: Proceeding Paper

Part of: Water for Resource Development

Abstract:

The effects of infiltration on the flood travel time are investigated. In flood prediction, the physical domain for flood cumulation is expressed by the period of time for water to travel from the upstream extremity to the outlet. Since the flood wave speed depends on rainfall excess; therefore, when a nonuniform rainfall excess is given, the flood travel time is no longer a constant time interval. In this study, Kinematic Wave Approximations combining with Horton's infiltration model is analytically solved. Solutions can give quantitative reductions on the flood hydrographs at different levels of soil antecedent moisture condition, and also indicate that Wooding's solution is a special case of the current study.

Subject Headings: Floods | Kinematic waves | Water waves | Soil water | Infiltration | Rainfall | Hydrographs

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