Research on design of Taocha hydro-junction project at canal head of Phase I Works of Middle Route Project of S-N Water Diversion

Taocha hydro-junction project is the diversion canal head of Middle Route Project of S-N Water Diversion and also the secondary dam of Danjiangkou Reservoir,and its functions are water retaining,water diversion,power generation by using diversion discharge and water head difference of the sluice.Through comprehensive consideration on the sluice function,sluice building condition,old sluice utilization,operation mode etc.and tech-economical comparison,the scheme of re-building the hydro-junction 70m downstream the original one is adopted.In the scheme,a tubular hydropower station is to be constructed on left bank and water diversion sluice on the right of the main canal.In the light of foundation rock integrity and permeability,the seepage control measures for dam foundation and mountain bodies on the bank are adopted.