三峡水利枢纽下游引航道的开挖在干地条件下进行施工，要求隔流堤具有防渗功能。
The downstream navigation channel of the Three Gorges Project is excavated on dry land, which requires that the partition dikes should prevent leakage.
改斜坡式断面为直立式断面，缩小下游引航道的过水面积，不仅能减少淤积量，而且有利于提高冲沙效率。
The change of the slope section to vertical section and the reduction of wetted cross-section may not only decrease deposition but also improve sediment scouring efficiency.
改斜坡式断面为直立式断面，缩小下游引航道的过水面积，不仅能减少淤积量，而且有利于提高冲沙效率。
The change of the slope section to vertical section and the reduction of wetted cross-section may not only decrease deposition but also improve sediment scouring efficiency.
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