渾水摸魚 fish in troubled [muddied] waters; acquire profit in time of trouble; grope for fish in turbid; profit by disturbances; profit in a confused environment; taking advantage of an accident to steal sth
On the one hand , the sediment density current often does a great harm to the reservoir , and causes a big loss of reservoir ' s storage capacity or makes reservoir severe deposition ; on the other hand , sediment outflow by density current is an effective measure to mitigate sedimentation 異重流(本論文中主要指因含沙量的差異而形成的渾水異重流)一方面常常給水庫帶來嚴重的危害,加速水庫的淤積和庫容的損失;但另一方面它又為水庫排沙提供了一種極為有效的途徑? ?水庫異重流排沙。