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南水进京2年1100万人受益 城区自来水比例超7成

2016-12-28 02:45:48   

另外,本市还开展了向潮白河水源地的试验补水,回补范围达24平方公里,回补区域地下水位最小回升5.42米,最大回升13.98米,平均回升7.5米,效果显著。

南水北调工程沿线还预留了接口,可实现与本市水利基础设施、五大水系的连通,充分发挥南水北调工程效益,扩大外调水供水范围、回补地下水,为城市河湖及沿线河流生态恢复提供条件。

 ◇输水

  未来将沿六环建第二条地下输水线

目前,本市南水北调配套工程已基本沿西四环以及东、南、北五环建成一条输水环路,并建设了向城市东部、西部输水的支线工程以及密云水库调蓄工程,形成“地表水、地下水、外调水”三水联调、环向输水、放射供水、高效用水的安全保障格局,为中心城及城市副中心、房山、大兴、门头沟等新城打通了新的水源输送通道。

未来,本市还将继续推进南水北调中线配套工程的建设。“目前北京的五环路地下,深埋着一根南水输水‘动脉’,未来六环路地下还将建设第二条输水线。”北京市南水北调工程建设委员会办公室副主任何凤慈介绍,第二条输水线将沿六环新建河西干线、南干渠二期、东干渠二期,在东侧与京密引水渠相接。在两条输水环路之间,有通州支线、大兴支线、东水西调工程等支线纵横连接。

据了解,“地下六环”的设计输水量可达每年17亿至22亿立方米,并同步建设配套的水厂。完工后主要为郊区送水,解决郊区水厂落后、长期超采地下水的问题。预计2020年之后开工,2030年完工。届时,本市将形成“双环供水,相互调配”的城乡供水安全保障格局。

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