Evaluation of comprehensive benefits of sponge cities using meta-analysis in different geographical environments in China
Evaluation of comprehensive benefits of sponge cities using meta-analysis in different geographical environments in China
复制标题
中国不同地理环境下海绵城市综合效益的Meta分析评价
DOI：
10.1016/j.scitotenv.2022.155755
复制
发表时间：
2022
影响因子：
9.8
通讯作者：
Yu Li
中科院分区：
文献类型：
--
作者：
Yingwei Yuan;Qian Zhang;Sheming Chen;Yu Li
随着城市化进程的快速推进，城市内涝和面源污染频发，威胁着人类的生存和健康。海绵城市建设已成为遏制城市内涝的有效手段。虽然相关研究对海绵城市的综合效益进行了探讨，但不同地理环境对径流控制和悬浮物去除的影响研究较少。以中国76个海绵城市为研究对象，采用meta分析方法，评价了气候、地形、下垫面条件和建筑面积与年径流控制率和SS去除率的关系。结果表明，在年平均降水量约1000 mm、植被覆盖度高、土壤肥力充足、地形坡度i≤2%、地层渗透系数100 ~ 200 m/d的综合条件下，海绵城市能显著提高径流控制效益，特别是在中国北方，综合效益的权重为25.5%。此外，研究结果有助于改造海绵城市建设中的不利地理环境，从而为治理SS污染提供更有效的解决方案。去除率最高的是中北部地区，去除率为21.4%。本研究综合考察了地理环境因素对海绵城市综合效益的影响，主要表现为年径流总控制率和SS去除率的提高。研究结果将为全球海绵城市的规划设计提供指导，并根据具体地理环境对现有建设的实践、规模和区位进行有效优化。
With the rapid progress in urbanization, frequent urban waterlogging and non-point source pollution are threatening the living and health of human beings. Sponge city construction has become an effective means to curb urban waterlogging. Although related studies have explored the comprehensive benefits of sponge cities, few studies have been conducted on the effects of different geographical environments on runoff control and suspended solid (SS) removal. Based on 76 cities with sponge cities in China, this study used the meta-analysis method to evaluate the relationships of climate, terrain, underlying surface conditions, and construction area with the increase in the total annual runoff control rate and SS removal rate. The results reveal that the runoff control benefit can be significantly improved by sponge cities under the combined conditions of average annual precipitation of approximately 1000 mm, high fractional vegetation cover, sufficient soil fertility, a terrain slope i of ≤2%, and a permeability coefficient of strata of 100-200 m/d, especially in northern China, where the weight representing the quantity of comprehensive benefits was calculated to be 25.5%. In addition, the study results assist in reforming unfavorable geographical environments in the construction of sponge city, thus providing more effective solutions for tackling SS pollution. The most significant benefits of SS removal were obtained in north central China, where the weight was 21.4%. This study comprehensively investigated the effects of geographical environmental factors on the comprehensive benefits of sponge city reflected by the improvement in the total annual runoff control rate and the SS removal rate. The results will provide guidance for the planning and design of global sponge cities and effectively optimize the practice, scale, and location of existing construction based on specific geographical environments.