研究表明，坝区水流结构与河势演变后形成的河床形态基本相对应。
Its shown that the flow structure in the dam area are basically corresponding with the bed configuration after evolution of the river situation.
本文结合近些年来我国北方河流出现的河床枯萎现象，分析了枯萎疏浚的基本原理及几个关键技术问题，对于目前在黄河等枯萎河道上采用疏浚防洪有一定的参考价值。
Based on the new phenomena of the shrinkage of river channels in North China, analyses of the basic principles and some key problems for dredging under shrinking conditions are presented.
通过选择有关参数，处理工程边界以及进口边界条件，用二维河道全沙数学模型计算所得的河床变形趋势与实测情况基本一致。
The trend of river bed deformation calculated by a plane 2-D numerical model of total sediment transport is in good agreement with the real conditions.
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