一、滞洪能力及运用概况丹江口水利枢纽1959年12月截流,1960年开始起滞洪作用,1967年汛末封闭导流底孔蓄水,经历了八年,这阶段称为滞洪期。 (一)滞洪期的两个阶段滞洪期的导流水工布置如图1,这样的导流方式保持到1966年未变动;1967年初右岸导流坝段逐步浇筑上升,7月封闭右侧八个底孔,11月又封闭左侧四个底孔.根据上述布置和变动,考虑坝址处过水能力的差别,可将滞洪期划分为两个阶段。从1959年12月截流到1966年 I. Overview of Flood Detention Capacity and Utilization Danjiangkou Water Control Station was closed in December 1959 and started to play a role of detention in 1960. At the end of the flood season in 1967, the diversion of water in the bottom of diversion ditches was completed, which lasted for eight years. This period is called detention period. (A) of the two phases of detention period Detention period diversion hydraulic layout shown in Figure 1, this way to maintain the flow did not change in 1966; early 1967 the right bank diversion dam gradually pouring rise, closed in July right eight Bottom hole, and closed the left four bottom holes in November again.According to the above arrangement and change, taking into account the difference in the water capacity at the dam site, the detention period can be divided into two phases. Closure from December 1959 to 1966