如果坝址下移，在利用同样的水头的情况下，坝址下移将导致坝高急剧增大，显

如果坝址下移，在利用同样的水头的情况下，坝址下移将导致坝高急剧增大，显然也是不经济合理的。因此，本次设计选择坝址选取在Ban Hangphou-Noy村跨会赛河便桥下游1.2~1.6km河段内，是合理的。

結果 (中文) 3:

If the downward movement of the dam site, in the use of the same head, dam site of gravity will lead to high dam increases rapidly, obviously is not reasonable in economy. Therefore, the design selection of dam site selection in the village of ban Hangphou-Noy cross will Sai River temporary bridge downstream 1.2~1.6km within the reach of the, is reasonable.