下凹式绿地对城市雨水集蓄利用作用研究进展

Effects of Sunken Green Space on Urban Rainwater Harvesting and Utilization

由于淡水分布不均,多数国家和地区水资源匮乏。城市耗水量巨大,尤其城市化的加快导致城市雨水大量流失,地下水位下降加剧了水资源枯竭。雨水是一种不可多得的可利用水源,很多国家已注意利用绿地收集利用雨水,我国也进行了相关研究。其中下凹式绿地是绿地雨水集蓄利用的改良措施,兼具景观、雨水利用、消减洪峰和控制雨水污染等功能。它比平式和凸式绿地具有更好的雨水集蓄利用功能。在分析雨水利用成为解决城市水源问题有效途径的基础上,着重综述了下凹式绿地雨水利用措施在我国的研究进程。探讨了目前该领域研究中存在问题,并提出建议,以期为更好的利用雨水缓解城市缺水局面,促进城市水循环及服务生态环境提供科学依据。

Now many countries and regions are lack of freshwater due to its uneven distribution on the earth.Urban's water consumption is huge.Particularly,accelerated urbanization causes rainwater loss and groundwater level drop,which further exacerbates water exhaustion.Rainwater,as a rare available water resource,has been utilized by green space in many countries including China.Sunken green space is a kind of rainwater harvesting and utilization measures with functions of landscaping,flood peak reduction and rainwater purification.Sunken green space is more powerful than flat or raised green space in terms of rainwater harvesting and utilization.Based on the analysis of rainwater collection as an effective way to solve water shortage problem,this study focuses on an overview of the progress of sunken green space in China.Moreover,issues in previous studies were discussed,and suggestions for future research were proposed.This study might provide a scientific basis for solving the problem of urban water shortage,promoting urban water recycling and optimizing ecological service of urban landscape.