三峡工程的施工通航和施工导流问题，长期存在不同意见。主要有两种方案。1、明渠通航、三期导流方案。第一期工程围右岸后河，修建明渠以及左岸临时船闸和永久船闸等，通航仍可在大江航道中进行。第二期工程修建大江二期围堰，江水通过明渠宣泄，利用明渠及临时船闸通航，同时 Three Gorges Project construction navigation and construction diversion problems, there are long-term disagreement. There are two main options. 1, open channel navigation, three diversion program. The first phase of the project will surround the river bank on the right bank, the construction of open channels, the temporary lock on the left bank and the permanent lock, and the navigation can still be carried out in the waterway. The second phase of the project built the second phase of the Second River cofferdam. The river water was released through the open channel and navigable through open channels and temporary locks. At the same time