摘要
以玉溪某人工湿地区域为研究对象,借助SWMM模型和ArcGIS工具对海绵城市建设理念下的人工湿地改造效果进行分析,包括调蓄能力、承接周边区域雨水能力和雨水资源利用等方面。结果表明,对该湿地采取清淤挖深和设置溢流堰等工程措施,可使其调蓄量增加51 070 m^3,这为人工湿地承接周边区域雨水、暴雨时削峰错峰提供了调蓄空间;在典型平水年条件下,人工湿地可收纳并蓄存的雨水总量为2. 97×10~5m^3,对整个收水区域的年径流总量控制率的贡献值达到12. 07%,对海绵城市建设的年径流总量控制率具有重要作用;另外,汇入人工湿地的雨水利用总量为241 874 m^3,人工湿地的雨水资源利用率为12. 15%,这对周边区域水资源节约和海绵城市建设中水资源利用率贡献极大。
Performance of a modified constructed wetland with the concept of sponge city construction in Yuxi was analyzed with the support of SWMM model and ArcGIS, which included storage capacity, the ability receiving rainwater from surrounding areas and rainwater utilization. The results showed that the storage volume was increased by 51 070 through dredging and digging and deploying an overflow dam for the constructed wetland, which enlarged the rainwater storage capacity to receive rainwater from the surrounding areas, and provided adjusting redundancy to cut down rainstorm peak. During typical meteorological years, the total volume of rainwater storage capacity accepted by the wetland was 2. 97 × 10^5 m^3, which contributed to 12. 07% of the volume capture ratio of annual rainfall in this region. Thus, the modified constructed wetland played an important role for the volume capture ratio of annual rainfall. Under the same condition, the total volume of rainwater utilized by the wetland was 241 874 m^3 with rainwater utilization rate of 12. 15%, which contributed greatly to water resource conservation in surrounding areas and water resource utilization in sponge city construction.
作者
焦继东
曲直
薛祥山
杜家慧
JIAO Ji-dong;QU Zhi;XUE Xiang-shan;DU Jia-hui(Beijing Tsinghua Holdings Human Settlements Environment Institute, Beijing 100083 , China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第3期130-133,共4页
China Water & Wastewater
关键词
人工湿地
雨水调蓄
雨水利用
海绵城市
constructed wetland
rainwater storage
rainwater utilization
sponge city
