Application of beach potential transfer method in regulation of Lancang River rapid shoal
Rapid shoal is a common type of beach danger in mountainous rivers,and it is difficult to be effectively regulated by conventional regulation methods,so the regulation method of beach potential transfer is put forward.The method is to transfer the original beach to the new beach,which has conditions to form a slow flow area for ships to go up to achieve overall navigation conditions.Taking the Wuming Beach section in Manting reach of Lancang River as an example,this paper analyzes the rapids characteristics,points out the causes of the difficulty by conventional regulation methods such as expanding the drainage section method,expounds the basic idea,engineering layout and analysis method of regulation effect of the beach potential transfer method,and describes the applicable conditions and scope of the beach potential transfer method.The beach potential transfer method is ideal for regulating beach groups with strong interrelatedness and significant impact from conventional regulation methods.The beach reduction index XF should not be excessively low after initial regulation,and 0.8-1.0 is suitable.The new shoal requires effective water confinement,but the resulting hazard area must not be excessively wide,ensuring a navigable area for upstream navigation.
beach potential transfer methodrapid shoalLancang Riverrapids abating indexdredging up and uplifting down
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