四川省都江堰灌区第一期扩(改)建工程,在工程完工经过正常运行之后,于1991年10月17日在都江堰管理局通过验收。都江堰灌区是全国特大型灌区之一,现灌面已达877万亩,由于多数工程配套不全。引、输、蓄水能力较低,不能充分地发挥效益。都江堰灌区的第一期扩(改)建工程,就是为了提高工程标准,增加干渠过水能力,改善引、输水条件而对灌区中老化、卡脖子的严重影响效益的工程进行改造和扩 Dujiangyan Irrigation District, Sichuan Province, the first phase of expansion (change) construction project, after the completion of the project after normal operation, in October 17, 1991 in Dujiangyan Authority passed the acceptance. Dujiangyan Irrigation District is one of the nation’s large-scale irrigation areas, now the irrigation surface has reached 877 mu, due to incomplete matching of most projects. Lead, lose, water storage capacity is low, can not fully benefit. The first phase of Dujiangyan Irrigation Project (reconstruction) project is to improve the engineering standards, increase the capacity of the main canal over the water, improve the conditions of lead, water irrigation in the aging, card neck serious impact on the effectiveness of the project to transform and expand