Assessment of Efficiency of SRH-2D Model in Hydraulic Analysis of Flow Due to Sudden Dam Break

The subject of dam break has always been one of the most important and favorite issues of researchers over the past years. Due to the release of a large volume of water and its flow to the downstream areas, predicting how the flood wave due to partial or complete dam break will be transmitted, from the point of view of financial damage to downstream facilities and casualties due to it is very important. Several one-dimensional, two-dimensional and three-dimensional numerical methods and computer models have been proposed to solve the hydraulic equations of flow due to dam failure in open channels. One of these computer models is the two-dimensional SRH-2D model, which is based on solving shallow water equations, and its latest version 3.3.1 was developed recently. This study was conducted to investigate the ability of this model to simulate hydraulic flow due to sudden dam break.For this purpose, the available laboratory data as well as the results of other 2D and 3D models were used. After implementing the model, the results were compared with the analytical solution of sudden one-dimensional dam break on the frictionless bed, partial and asymmetric dam break with the presence of a triangular obstruction in the downstream flow path and also comparing the results of two-dimensional failure of water cylindrical column. In all cases, the present model accurately simulated the flow due to dam failure.