水口坝下水位治理工程施工期通航研究

水口坝下水位治理工程施工期为3.5 a。为了解决施工期通航问题，针对施工河段的通航条件和水位治理枢纽布置情况，通过理论分析和模型试验，提出了航道疏浚清淤、炸礁除障与电站科学调度相结合的通航确保措施。结果明，二期围堰与四期围堰施工期间，两个枯水季节的部分时段的通航保证率较低；其余施工时间内，施工河段的通航保证率均达85%以上，提出的通航确保措施实现了水口坝下水位治理工程施工期间闽江航运的畅通。

Navigation during regulation of tail water level of Shuikou hydroelectric station

The regulation of the tail water level of Shuikou hydroelectric station will need at least 3.5 years. Based on the arrangement conditions of water level treatment hinge and navigation conditions of the construction reach, through theoretical analysis and model experiment, we propose the navigation guaranteeing measures which combine waterway dredging, reef explosion for barrier clearance with scientific station dispatch. The results indicate that the navigation reliability is lower in the partly time intervals of the two dry seasons, during the construction time of second and fourth stage cofferdam. However, during other construction periods, the navigation reliability is more than 85%. The navigation measures are proposed to ensure the shipping in Minjiang river is unimpeded during construction.