Discussion on the horizontal length of jet flow and its factors of influence;

The arrangement is suitable to the topography of baffle areathe deflecting nappe will extend vertically and longitudinally and diffuse sufficiently with its dissipation rate increasing in the air and outer edge of nappe falling in appropria.

Velocity and hydrodynamic pressure distributions produced by high arch dam water jets in a water cushion pool;

The turbulent jet theory and water flow momentum equation are used to establish the mathematic model for calculating bedrock scoured balance depth of river bed under the action of left-right collision of water jet from high arch dam in considering 3-D diffusion,leakage collision flow and collision energy losses of water jet dispersion in the air.

It is shown that distribution of flow on throw flow nose ridge is symmetrical and the throw distance is far, moreover, the downriver irruption is shallow.

Discussion on the trajectory distance estimate in trajectory bucket type energy dissipation;