One of the main problems of spillway tunnel with large discharge and high velocity flow is the cavitation damage.
高水头、大流量泄洪洞内高速水流问题主要问题之一是水流空化引起过流表面空蚀。
The second stage is to close the left bank main river bed, divert the stream to the right bank open channel and build the spillway section in the mian river bed and the powerhouse on the left bank.
二期工程围左岸主河床 ，右岸明渠 （建于一期 ）导流 ，建主河床泄洪坝段及左岸电站厂房。
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