For a triangular elementary section of a gravity dam made of concrete with base width of 3 0 m and height 1 0 0 m calculate any four forces and their corresponding moments with respect to the downstream toe acting on the section if the water depth in the reservoir is 9 0 m and there is no drainage or tail water condition The value of earthquake acceleration coefficient can be taken as 0 1 and pressure coefficient resulting from earthquake can be taken as 0 0 5 Sketch the dam section and the forces acting on it b What are the modes of failures of a gravity dam and how do you calculate the factor of safety c Sketch a flow net of flow and equipotential lines beneath an earthen dam Derive an expression for rate of seepage q from the flow net using Darcys law What are the steps involved in assessing the stability of an earthen dam solve it and sketch each and every part on paper