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暴雨后不再“看海”

2017-08-23 08:28:08   中国青年网

城市内涝非朝夕可破

道路能“喝水”,屋顶能蓄水……大雨到来之际,其他地区纷纷盼望着,大雨早点结束,而作为海绵城市建设试点之一的重庆两江新区悦来会展公园却希望雨“多下一点”。

该公园相关负责人称,公园采用的砖均为透水砖,其成本约在100多元一平方米,由沙棘、混凝土挤压成型,渗水性极佳。公园内有五个雨水回用池调蓄设施,足够供给近800亩地的草木浇洒。如今可以通过渗水系统,将雨水收集利用起来,每年水费可节约30万元左右。

据介绍,我国自2015年启动海绵城市建设试点以来,截至2017年4月,海绵城市建设试点项目已建设面积420平方公里,完成投资约544亿元。全国已有370个城市提出海绵城市建设专项规划。

尽管海绵城市的治涝功效显著,但在北京大学建筑与景观设计学院院长俞孔坚看来,海绵城市并不是一天就建成的,它可能需要5年、10年,甚至更长时间才能解决。海绵城市试点,都有一定的示范作用,但是,这个示范意义大多是局部性的。

“海绵城市虽然在防城市内涝上成效初显,但它也存在投入过大、受地形限制较多等制约因素。”刘远军认为,海绵城市仅仅在新规划的、地势平坦的地区适用,在老城区和坡度较大的地方并不适用,且它还是一个系统工程,巨额投入也让很多经济欠发达地区望而却步。

针对城市内涝治理问题,多位专家明确表示,“城市内涝非一朝一夕可以根治,需要长远的规划和坚持。”

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