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拉洛水利枢纽及配套灌区工程位于日喀则市境内,是雅鲁藏布江右岸一级支流夏布曲干流上的控制性水利工程,由枢纽工程和配套灌区组成。枢纽工程由大坝、泄水建筑物、电站、灌溉引水隧洞等组成,水库总容量约2.97亿立方米。配套灌溉区由申格孜、扯休、曲美、聂日雄四大灌溉区组成,设计灌溉面积45.39万亩。
自治区拉洛水利枢纽及灌区管理局局长张云宝介绍,该工程概算总投资逾49.5亿元,所需资金由中央预算内投资金额安排,2014年6月开工建设,设计总工期58个月。该工程开发任务以灌溉为主,兼顾供水、发电和防洪,并促进改善区域生态环境创造条件。
素有“肥美庄园”之称的日喀则市作为西藏全区最大的粮食产区,工程涉及到的四大灌区正是该市的粮食生产基地,也是四大旱区之一,由于水利设施缺乏,长期以来当地丰富的土地资源得不到有效利用,处于半荒漠化状态。工程建成后,农田灌溉保证率将达到75%。同时,四大灌区的宜垦土地开发,将为生态移民、扶贫搬迁政策的实施提供可靠保证,使贫困人口“搬得出、留得住、富得起”。
该工程还会发挥巨大生态作用,对防风固沙、防减灾害等方面有积极作用。另外,即将建成的两座电站总装机容量为4.2万千瓦,设计多年平均发电量8500万度。工程建成后,可将下游的重要城镇和灌区的防洪标准提高到5年一遇,待下游堤防工程建成后,远期可配合堤防工程,将下游的重要城镇和灌区的防洪标准提高到20年一遇。
责任编辑:李皓 CN002
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