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“火炉”武汉缘何不再那么热?城市植被如绿色空调

2018-07-25 07:41:01    新华网

  原标题:“火炉”武汉缘何不再那么热

“火炉”是不少人对夏季武汉的第一印象,但事实上武汉早已退出中国“四大火炉”之列,原因何在?许多人的答案是:武汉绿色城市建设功不可没。

如今的武汉,有近40%的绿化覆盖率,人均绿地达10多平方米,城市植被犹如一台台巨大的绿色空调,在不断为城市降温。

  楼退绿进:“绿色空调”铺绿降温

泼水睡竹床,天热下长江。这是很多武汉老市民消暑度夏的习惯。作为中国昔日“四大火炉”的代表,江城武汉却在近年来的“火炉排行榜”中,不见踪影。

在全球变暖背景下,武汉告别“火炉”背后因素众多,但城市植被的增加功不可没。绿植通过蒸腾作用与光合作用,大量吸收空气热量与二氧化碳。

据武汉区域气候中心统计分析,武汉植被覆盖率每提高5%,炎夏季节地表温度可下降约1.3℃。

据统计,1985年武汉市人均公共绿地面积仅为1.80平方米。在高楼耸立的现代城市,如何利用寸土寸金的土地空间增加绿色植被覆盖,是当前各大城市面临的共性难题。

武汉市园林和林业局总工程师吴克军介绍,这几年,武汉市每年投入约百亿元,挖空心思见缝插绿、掘地植绿、破硬增绿、筑台补绿,看到空白区就种树,尽一切可能提升“绿容率”:在武汉高架桥上,种满攀爬植物;在地铁线上面,也用盆栽箱种树铺绿……

近年来,在推动城中村改造、生态治理等工程中,武汉市不计投入成本,用成荫绿树替代房地产,将黄金地段、核心区域改造成生态公园、永久绿地,实现“楼退绿进”,增加城市绿化覆盖:蛇山“显山透绿”、金口垃圾填埋场改造成园博园、戴家湖粉煤灰堆场恢复绿水青山、取缔非法码头江滩披绿、城市“巴掌地”建口袋公园铺绿……

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