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Evolution characteristics of riverbed in fluctuating backwater area. 變動(dòng)回水區(qū)河床演變特性。
During the construction of Three Gorges Project, in some part of the river, due to the change of water level in fluctuating backwater area, the difficulty of navigation is intensified. 三峽工程施工期變動(dòng)回水區(qū)河段由于水位變化，使部分河段礙航情況加劇。