【摘要】依扎克水电站是叶尔羌河与塔什库尔干河汇合后的第一个规划梯级，工程坝址位于峡谷段，两岸山体陡峭雄厚，河床覆盖层73m。叶尔羌河上游有冰原湖，1~2年就会发生一次冰川溃坝洪水。在此类工程条件下，当地材料坝如何协调泄洪建筑物规模与坝高以保证工程安全是本工程设计的主要经验。

【关键词】冰川溃坝洪水；狭窄河道；深厚覆盖层；度汛

【abstract】according to zach yeerqiang river hydropower station is the confluence with the river taxkorgan the first planning steps, the project site is located in canyon paragraph, the two sides steep mountain solid bed cover 73m. yeerqiang river upstream lake ice, 1~2 years will be an ice dam-break flood occurred. works in such conditions, local materials spillway dam how to coordinate the size and height of buildings to ensure that safety is a major engineering design experience.

【key words】glacier dam-break flood; narrow river; deep cover; flood season

1.概述依扎克水电站工程位于新疆维吾尔自治区喀什、克州两地州境内的叶尔羌河与支流塔什库尔干河汇合口下游0.3～1.2km河段上，在克孜勒苏柯尔克孜自治州阿克陶县境内，工程所在地距莎车县174km，距塔什库尔干县138km，库区以上河段内淹没、移民不大。工程区地震基本烈度为8度，主要建筑物设计地震烈度为8度。依扎克水电站采用混合式开发，工程主要任务是发电，水库正常蓄水位1925m，总库容1.85亿m3，总装机240mw，属大（2