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连续 20 天 每天补活水 12 万立方米

2017-08-16 06:22:23   中国青年网

因为常年没有活水流入,加上库区养鱼及周边养殖场排污等因素影响,这座高山水库水质多年在Ⅳ类或Ⅴ类波动,离国家规定的生活饮用水水源地水质至少为Ⅲ类的标准还有差距。

由于大龙山水库水质常年不达标,在复兴镇场镇,还曾出现难得一见的“代卖井水”生意,场镇净水器的生意也曾火爆一时。

在四川日报民情热线栏目对此进行报道后,经过2015年的专项整治,近两年场镇上的水质有明显改善。

“这两年,水质好多了,至少没得啥异味和杂质。”在复兴镇场镇经营超市的一位老板,端出一碗自来水给记者看。当天,与记者交谈的居民均表示水质有好转,不过,大家仍期盼水库水质能早日达标。

射洪县提供的7月24日水质监测数据显示,大龙山库区水样的高锰酸盐、总磷、化学需氧量等三项指标超标,属于Ⅳ类水质,有轻度富营养化;复兴自来水厂水样水色度、二氧化氯等两项指标不达标,但管网末梢水质符合国家生活饮用水卫生标准。

换水

增加引活水的频次和方量

确保水体流动性

围绕大龙山水库污染治理,遂宁市委市政府主要领导多次带队实地督办,射洪县成立复兴镇饮用水源地大龙山水库整改工作领导小组,环保、水务、畜牧、住建以及乡镇等多部门参与其中。

8月31日前,库区要全面完成整治,水质得到明显改善,是射洪县必须啃下的“硬骨头”,射洪县副县长王勇挂帅大龙山水库整改工作领导小组组长。

“先放水,再引水,以水体置换尽快提升水库水质。”据王勇介绍,当前从武都引水工程绵阳沉抗水库引来活水,计划每天补水12万立方米,与此同时,大龙山水库原有库存死水的排放也同步进行。按照这一方案,通过连续20余天不间断的水体置换,将换来库区Ⅲ类标准水质。

8月10日中午,记者在现场看到,经过几天的连续排放,库区水位已明显下降,原本150万立方米的蓄水已排放约一半的量,水体呈现出淡淡的褐色。

王勇表示,过去每年只从武都水库引水两次、每次20万立方米。按照新的方案,今后将改变这一惯例,根据水体情况增加引入活水的频次和方量,确保库区水体的流动性。

8月15日,记者了解到,经过5天时间的活水注入,库区水位已上升约40厘米,补水效果还需持续观察。

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