A physically based model for scour prediction at Srisailam dam

摘要

This paper presents a comprehensive evaluation of 20 years of plunge pool scour development at Srisailam dam in Andhra Pradesh, India. A comparison is made between one of the most widely used scour expressions, and a new physically based engineering model for scour prediction. While the former only predicts the ultimate scour, the latter also allows for estimating the time evolution of scour by incorporating the geomechanical characteristics of the fractured bedrock. Detailed data on bathymetric surveys and gate operations since 1984 allowed for a sound comparison between the methods.