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受益于南水北调 11月北京地下水量同比增百个昆明湖

2016-12-29 10:20:13   新京报

原标题:11月北京地下水量同比增百余个昆明湖

新京报讯(记者信娜)南水进京已两年。除水厂用水及水库存蓄外,共补充地下水1.47亿立方米。记者从北京市水务局了解到,今年11月份末,北京地下水埋深为25.45米,比去年同期回升0.42米,地下水储量增加2.2亿立方米,按照昆明湖200万立方米容积计算,相当于增加了百余个昆明湖的蓄水量。

南水北调工程(资料图)

11月地下水埋深同比回升0.42米

北京地下水正在逐步得到养蓄。根据北京市水务局监测数据,今年11月份,北京地下水埋深为25.45米,比去年同期回升0.42米,地下水储量比去年同期增加2.2亿立方米。

南水进京后,通过开展自备井置换等工作,北京地下水开采量逐渐减少。以北京汛期后的10月份为例。10月份,北京地下水埋深为25.46米,比去年同期回升0.53米,地下水储量增加2.7亿立方米。北京市水务局相关负责人介绍,目前,通过优先利用南水北调江水,不断扩大再生水、雨洪水等非常规水源利用规模,逐步压减地下水开采,促进地下水逐步得到养蓄。

良乡水厂工程已开工建设

南水进京已两年,截至2016年12月27日累计向北京输19.4亿方。其中水厂用水累计13.2亿方,水库存蓄2.8亿立方米,补充地下水1.47亿立方米。

保障北京市供水需求仍为南水主要作用。市水务局相关负责人介绍,目前,东水西调改造工程已投入运行,通州支线、通州水厂(一期)、第十水厂主体工程已完工,即将投入运行。

此外,大兴黄村水厂(一期)、良乡水厂工程已开工建设。团城湖至第九水厂输水工程(二期)、河西支线工程、亦庄调节池二期工程计划年内开工建设。石景山水厂、门城水厂、长辛店第二水厂(一期)、亦庄水厂工程也正在开展前期工作。

释疑

地下水超采情况如何?

南水进京后地下水超采程度有所减缓

地下水是北京城市供水的主要水源,占北京市供水量的50%左右。南水进京后,北京地下水开采量逐步减少。北京市水务局相关负责人介绍,由于自1999年以来连续多年干旱,为保障首都供水安全,不得不超采地下水,使地下水水位持续下降。

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