Aiming at merit and demerit of sediment discharge and cleaning measures of reservoir at present,through model tests,the self-absorb pipe sediment discharge system and siphon pipe draining sediment system were simuated.Pipe sediment discharge system can fully use the effective water head of reservoir and discharged sediment through pipe.The effect of two sediment discharge systems were checked.Tests showed that two kinds of pipe sediment discharge systems had higher efficient,less water consumption and highe...