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灵渠完工于公元前二百一十四年,距今已有两千二百年的历史,工程主体包括铧嘴、大小天平、南渠、北渠、秦堤、陡门等,设计精巧,沟通长江和珠江两大水系,是目前世界上保存最完整的古代水利工程之一。灵渠与四川
省的都江堰、陕西
省的郑国渠齐名。一九六三年三月,郭沫若视察灵渠时曾高度评价灵渠:“与长城
南北相呼应,同为世界之奇观。”
铧嘴是灵渠的重点工程之一,原长一百八十六米,一八八五年洪水冲毁八十一米。早在一九八六年,中外一百多名资深水利专家齐聚灵渠参加全国水利史会议时,对修复铧嘴进行了实地考察。到二00五年,经过多次模拟试验、论证,并得到国家文物局批准对铧嘴进行修复。同年十二月,投资达三百多万元的修复工程正式动工。
兴安县县长王建毅在竣工典礼上说,古人设置铧嘴,有三大作用:一是分洪;二是“三七分水”。河水经铧嘴一分为二,再经大小天平科学巧妙的平衡作用,七分水入北渠,三分水入南渠,形成“三分漓水七分湘”之说;三是导航。一九八八年,灵渠被列为全国重点保护文物单位,成为桂林大旅游圈的一块瑰宝,已被国家文物局列入世界文化遗产申报名录。
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