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贵港江河湖库水质逐步改善

2017-08-18 08:36:32   中国青年网

本报贵港讯 (记者/余锋 通讯员/麦安明)贵港市的武思江水库、平龙水库作为我区的重点湖库,过去因受网箱养鱼、农业面源等污染而造成水质严重下降。该市在接到中央环保督察组反馈意见后,加强落实“水十条”,加大污染源的排查力度,针对农业面源污染开展综合整治,推进生态禽畜养殖,主要江河湖库水质逐步改善。

武思江水库2015年的氨氮、总磷浓度,比2014年分别上升142%和90.9%,水质下降为Ⅴ类。对此,贵港市制定了武思江水库水质整改工作方案,对水库上游范围内的水面网箱养殖和沿岸陆域纵深50米的畜禽养殖情况、水库捞沙船只排查并登记造册。有关部门根据摸底排查结果,依法取缔无证水库网箱养鱼400多箱。同时,加强对农业面源等污染源的综合整治,着力解决氨氮、总磷浓度超标问题,逐渐恢复水库水体功能。监测结果表明,该水库去年9月总磷浓度为0.19mg/L,今年2月降至0.10mg/L,水质从Ⅴ类变为Ⅳ类,有所改善。

针对平龙水库的氨氮、总磷浓度超标问题,覃塘区政府组织相关部门和有关乡镇开展水库网箱养鱼、农业面源等污染源综合整治,对水库内两家水库网箱养鱼予以取缔。加强水库周边畜禽养殖标准化建设,在限定的时间内逐步取缔不符合环评要求的养殖场;强化水库水源地及上游集水域内建设项目管理,完善水源地上游城镇生活垃圾收集和处理系统,避免生活垃圾对水环境造成二次污染;优化农业生产结构,科学施肥,减少农药污染。

经过一系列整改,平龙水库的环境问题正逐步得到解决,水库水体功能逐渐恢复,水体质量有所提高。监测结果显示,该水库今年4月总磷浓度为0.03mg/L,监测项目均达到国家《地表水环境质量标准》的Ⅲ类标准。

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