Dam Break Analysis of Earthen Dam in Goa

Dams are an integral part of the country’s economy and development. Dams are confines built over a river to store water and construct a reservoir that serves various purposes. It is very important to have dam safety maintenance and monitoring. Therefore, dam breach analysis becomes an essential part of examining unforeseen repercussions posed to human habitat and environment by an abrupt release of water downstream of a dam. Every dam structure needs to be assessed whether built or proposed for the risk of collapse in essence to find out the precise consequences that would arise after the breach. The present study aims to find out the breach magnitudes of the Salaulim Dam located in the Sanguem taluka in Goa using the Hydrologic Engineering Centre’s River Analysis System viz. HEC-RAS software. The dam is analyzed for the Probable maximum flood (Overtopping) scenario and the Clear Day Failure (Piping and internal erosion) failure scenario adopting the two-dimensional unsteady flow modeling.