Hydraulics research on main conveyance structures inDiversion Project from South to North China

The hydraulics test results on main conveyance structures of the Middle Line of Diversion Project from South to North China are represented. These engineerings contain six items, e.g.,the heightening of Danjiangkou dam, the extension works of Taocha Sluice,the Zhanghe Aqueduct on the main canal, etc..The study contents include discharge capacity,energy dissipation,flow pattern,pressure dustribution and local head loss, etc.. Investigation data on roughness n of concrete canals and prototype observed results in three operated canals are introduced. The results have provided a reliable basis for the design, and pointed out the problems to be further studied.