NUMERICAL SIMULATION OF DAM BREAK 12 SCENARIO

Abstract

In the present work, the dam break flow due to hypothetical failure of a model dam by using MIKE 11 has been attempted. For this purpose, a widely adopted computer model 'DAMBRK' is used. In this model, complete Saint-venant equations in one-dimension are used as governing equations for channel muting. An efficient four point presimann scheme is used to perform the numerical solution of these governing equations. The necessary data set has been collected through various sources and for the unavailable data; certain assumptions were made according to suitability of the required conditions. A sensitivity analysis is performed to study the effects of breach width, time of breach development, and bed roughness on the flood wave propagation due to dam break flow. Comparative analysis has been done using NWS (National Weather Service) and MIKE 11 models for the evaluation of flood wave routing and estimation of travel time for dam break flow along with the water level and discharge in the downstream of the dam at different locations. This study is focused at determining the temporal and spatial variation of water surface pm file and discharge.