Investigate the compliance of mike11 and muskingum cunge method for flood routing in karun river

Flood as an unsteady gradually varied flow has special importance in river engineering. Because with knowing the exact range of water level variations in a certain location of river, we can make better decisions for decrease harmful effects of water on major structures and also prevent of their unreasonable services. Muskingum Cunge is one of the widely employed methods for flood routing that direct calibration of this method based on previous flood events is not required and the routing parameters are determined according to physical characteristics and hydraulic conditions of the stream. In this study we have compared the results of Muskingum Cunge as a simplified hydraulic method and MIKE11 model for Flood Routing in the reach between Mollasani to Ahwaz stations located at desired region of the mentioned river. The results of this study demonstrated successful performance of the simplified routing methods and showed that in situations where the availability of intensive data required by hydrodynamic model are limited, relying on such simplified method would provide satisfactory results. Based on comparison among the results of the employed method with that of the hydrodynamic one, the most suitable method for the studied condition is determined.