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长江流域平原区地下水位降落漏斗减少 地下水位有所上升

2017-09-01 17:51:05   中国青年网

新华网武汉9月1日电(记者黄艳)随着政府对地下水资源保护力度加大,近年来长江流域平原区地下水位降落漏斗减少,漏斗面积减少,地下水位有所上升。

这是记者从长江委日前正式公布的2016年《长江流域及西南诸河水资源公报》(以下简称《公报》)中了解到的。根据《公报》,地下水位降落漏斗是指由于部分地区地下水过量开采,致使地下水位下降,形成地下水降落漏斗,对水资源的正常循环产生影响。

2016年,长江委对上海、江苏、浙江、江西、湖北5个省(直辖市)的部分平原地区地下水位降落漏斗进行了不完全调查,共统计漏斗9个,有10个漏斗中心,当年年末漏斗总面积2683.46平方千米,其中深层漏斗中心8个,浅层漏斗中心2个。与2016年年初相比,8个深层漏斗中心水位均上升;漏斗面积减少的有7个,漏斗面积持平1个。2个浅层漏斗中心中,漏斗中心水位上升1个,下降1个;漏斗面积均减少。

记者梳理历年《公报》了解到,长江流域平原区地下水位降落漏斗主要在长三角及江西鄱阳湖地区,由于工业经济快速发展,在2006年左右这一带大力开采地下水,加上海水潮汐的顶托作用,形成地下水位降落漏斗的高峰期。

长江委水资源局副局长管光明表示,此后国家和地方政府加大对地下水开采的管理力度,一些地方实行了限采、禁采,同时由于长江大保护和经济转型升级等影响,这一区域的地下水位逐渐上升,地下水资源稳定区占比达到80%以上,漏斗面积整体呈现缩小趋势。

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