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Journal of Applied Sciences
  Year: 2012 | Volume: 12 | Issue: 18 | Page No.: 1900-1908
DOI: 10.3923/jas.2012.1900.1908
Rainfall-runoff Simulation and Modeling of Karun River Using HEC-RAS and HEC-HMS Models, Izeh District, Iran
Hadi Tahmasbinejad, Mehdi Feyzolahpour, Mehdi Mumipour and Fatemeh Zakerhoseini

Abstract:
This study developed a framework for regional scale flood modeling that integrates GIS and two hydrological models. Hydrologic Engineering Center-Hydrologic Modeling System (HEC-HMS) and Hydrologic Engineering Center-River Analysis System (HEC-RAS) models are used to simulate and model relations between rainfall and runoff in Karun River, SW Iran. The Karun River is the domain of the study because it is a region subject to frequent occurrences of severe flash flooding. The model consists of a rainfall-runoff model (HEC-HMS) that converts precipitation excess to overland flow and channel runoff, as well as a hydraulic model (HEC-RAS) that models unsteady state flow through the river channel network based on the HEC-HMS derived hydrographs. For model calibration, the simulated results were compared with the observed water storage data for several storm events. The same rainfall event in Izeh district generates almost twice as much of the surface water runoff generated in each of other downstream. This is mainly attributed to the large catchment area of Izeh basin as compared to the other two basins. The modeling framework presented in this study incorporates a portion of the recently developed GIS tool named Map to Map that has been created on a local scale and extends it to a regional scale. The results of this research will benefit future modeling efforts by providing a tool for hydrological forecasts of flooding on a regional scale. While designed for the Karun River, this regional scale model may be used as a prototype for model applications in other areas.
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How to cite this article:

Hadi Tahmasbinejad, Mehdi Feyzolahpour, Mehdi Mumipour and Fatemeh Zakerhoseini, 2012. Rainfall-runoff Simulation and Modeling of Karun River Using HEC-RAS and HEC-HMS Models, Izeh District, Iran. Journal of Applied Sciences, 12: 1900-1908.

DOI: 10.3923/jas.2012.1900.1908

URL: http://scialert.net/abstract/?doi=jas.2012.1900.1908

 
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