The harm of high sediment content flow to hydro-turbine and the counter-measures
wen zhan wu 1; liang wu ke 2; luo xing qi 2; liao wei li 2 (1. weijiapu hydropower station in baojixia irrigation district; shaanxi baoji 722301; china; 2. institute of hydro machine and its automation; xi an university of technology; shaanx