Application of physical exploration methods in detection of cofferdam leakage location of Shuhe hydropower station on the Hanjiang River

The result of leakage stopping for the 1st-stage dry season cofferdam of Shuhe hydropower station is not good due to various reasons.The key issue and difficulty during cofferdam leakage stopping construction is how to determine the leakage location accurately.Using physical exploration methods such as ground penetrating radar method,high-density electric survey and transient Rayleigh wave method,main leakage locations are identified successfully,providing convenient conditions for leakage stopping construction,and giving good results.