The sediment supplement decrease,artifical excavating sand gravel aggregate and the scouring near dam area had caused the water level declines at Yichang station during dry season.

 
  • 宜昌枯水位的降低主要是由于泥沙补给减少、人工采挖沙石骨料以及近坝段河床明显冲刷造成的。
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