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1981年7月在四川省发生的建国以来最大一次灾害性的暴雨过程中,由于四川在解放后修建了大量蓄水、引水和节制闸等水利工程,及时地拦蓄、截引了相当数量的洪流,起到了削减下游洪峰减轻了洪灾的作用.这是灾区的党、政领导和群众,在组织生产自救过程中得出的一致看法.在嘉、岷、沱这三个流域内,所修建的水库、山平塘和石河堰,都在暴雨期间拦蓄了大量山洪,在7月份已成工程实蓄水量比6月份增加了十二亿多立方米.加上工程本身的滞洪作用,相对地削减了下游洪峰,减轻了沿江一带的洪灾损失.
In July 1981, during the largest catastrophic torrential rains in Sichuan Province since the founding of the People’s Republic of China, a large number of water conservancy projects such as water storage, diversion and control gates were constructed after the liberation in Sichuan Province, and timely storage and interception of a large number of floods , Played a role in reducing the flood peak downstream to alleviate the flood.This is the disaster area party, government leaders and the masses in the process of organizing the production and self-help reached a consensus in the Ka, Min, Tuo these three basins, built The reservoirs, the Pingtung Pond and the Shiheyan have all saved a great deal of flash flood during the heavy rains. In July, the actual accumulated water storage volume increased by 1.2 billion cubic meters compared with June. Coupled with the delaying effect of the project itself, The downstream flood peak, reducing the flood damage along the river.