一、问题的提出随着水利水电建设事业的发展,我国南方和西南的一些大的河流上,在规划和设计大型水力发电工程时,愈来愈多地遇到航运过坝问题,特别是船只要经过高水头的水利枢纽,在经济上和技术上都遇到 First, the issue raised With the development of water conservancy and hydropower construction, some large rivers in southern and southwestern China, in planning and design of large-scale hydroelectric projects, more and more encountered by shipping problems over the dam, especially the ship As long as the high head of the water project, both economically and technically encountered