最后采用两种途径预估了将来三峡水库淤积平衡后的坝区平衡面积及过水面积。
Finally, two approaches are adopted to estimate the balanced bed area and the area of flow section in the dam region of the Three Gorges reservoir after sedimentation balance in future.
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.
山体总面积一般不超过水面的一半或少于一半。
Mountain area is generally not more than half or less than half the surface of the water.
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