Experimental Study on the Optimization of a Diversion Engineering in Lower Reaches of Fuhe River

In jiangxi province, china, a new river will be excavated in the southern part of Qinglan Lake to drainage main flow Fuhe River into improve local flood prevention and navigation problems. A physic model is established analyze changes characteristics under different engineering schemes. The research shows that water level decreases 1.91m, velocity upstream increases 4.83 m/s, P=5% flood, which means diversion can significantly relieve pressure, but increase scouring risks wading buildings such as piers embankments. Then further optimization study scheme 3 not only reduced quantity, also decreased rate from 61% 48%.