Hydraulics test research on diversion sluicefor extension project of Taocha Canal Headwork

The extension project of Taocha Canal Headwork will be the water sources project of the Middel Line of Diversion Project from South to North China. The practical mode of opertion of the old works and, emphatically, the hydraulics test results of late extension project of the sluice, i.e.,the heightened scheme of rockfill dam, are represented,including discharge capacity,the discrimination and analyisis of flow patterns in the culvert, the conjuction of flow downstrearn and the pressure properties on the side wall of structures. Some modifications recommendations for the design and some concrete measures for improving hydraulic characteristics in culvert by reasonable gate operation are proposed.