Through the experiment on movable bed model of river engineering and combining theoretical analysis,the effects of deposition falling with tranquil flow of permeable pile dike for bank protection applied to the Yellow River and local scouring process near the pile pillar have been studied.

Phenomena of "scour in flood rising and deposition in flood falling" in alluvial rivers;

Three control conditions such as discharge,size of cross section and tail water level for uniform silting in the rectangle fields have been investigated by the authors based on transportation characters of flow and sediment, and conservation principle of sediment mass.

The research analyzes variation features between ground reaction forces of people enduring and joint reaction force and torque of joint on the ankle and knee and hip, and search changes of people s lower extremity stiffness under 8 different height landing and buffering experiences.