三峡工程水头高，流量大，下游河床冲刷成为人们的关注点。
The scouring the river bed before the Three Gorges Dam with high head and huge discharge has been given a special attention.
同时剖析和验证了长江中下游河床具有较强的自动调整作用。
And the strong capability of channel self adjusting in Mid and Down stream reaches of Changjiang River is...
建坝后水库下泄水流挟带的床沙质含沙量减少，坝下游河床出现冲刷。
The released flow from reservoirs carries less sediment load of bed material than pre? dam periods.
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