Experience and enlightenment from the emergency risk-elimination practice on the Kama reservoir

During the flooding season of 2009,the Kama reservoir of Guangxi Autonomous Region experienced an emergency situation.The dam safety risk was at all time high.While emergency actionswere taking place,the state of the dam was studied using the finite-element seepage analysis and the slope stability analysis was also conducted using the nonlinear index approach.The study revealed that the damage position was likely located in the mid portion of the diversion tunnel.Such a diagnostic is particularly desirable in the evolution of damsafety risk assessment and in the subsequent decision making.As the result,proper measures to eliminate the risk were determined,and the risk of dam break was effectively reduced.The experience obtained from the emergency riske lmiination practice on the Kam a reservoir and the associated key techniques can serve as a typical case for addressing the important issues in the management of reservoir safety in China.