It is feasible to control river pollution through water diversion. The clean water could dilute polluted
rivers, which results in the black and stink of water body eliminate quickly, the self-purification capacity
of water body improved. The water diversion to flush out pollutants was used in Fuzhou, Zhongshan and
other cities in China, while the calculation of diversion scale was the key technology based on the effluent
water quality. For example, Hong Lijian analyzed the effect of flushing out pollutants of diversion scale
about Fuzhou River, which was applied to engineering design [5]. But the project of water diversion to
flush out pollutants was large and the cost was relatively high.