Assessment on the Effectiveness of Urban Stormwater Managementopen access
- Authors
- Zhang, Yixin; Zhao, Weihan; Chen, Xue; Jun, Changhyun; Hao, Jianli; Tang, Xiaonan; Zhai, Jun
- Issue Date
- Jan-2021
- Publisher
- MDPI
- Keywords
- Sponge City; residential community; stormwater management model (SWMM); Low Impact Development (LID); ecosystem services
- Citation
- WATER, v.13, no.1
- Journal Title
- WATER
- Volume
- 13
- Number
- 1
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/62625
- DOI
- 10.3390/w13010004
- ISSN
- 2073-4441
2073-4441
- Abstract
- Stormwater management is a key issue in line with global problems of urbanization and climate change. Assessing the effectiveness in managing stormwater is crucial to maintain urban resilience to flooding risk. A method based on a stormwater management model (SWMM) was developed for assessing the control of stormwater runoff volume and the percentage removal of suspended solids by implementing a Sponge City strategy. An interdisciplinary approach was adopted incorporating Low Impact Development (LID) with urban green infrastructure and grey infrastructure paradigms in a typical old residential community in Suzhou, China. Sponge facilities for reducing stormwater runoff included bio-retention cells, permeable pavements, grassed pitches, and stormwater gardens. The simulation results of SWMM show that the stormwater pipe system can meet the management standard for storms with a five-year recurrence interval. The volume capture ratio of annual runoff was 91%, which is higher than control target of 80%. The suspended solids reduction rate was 56%, which meets the requirement of planning indicators. Thus, the proposed method of spongy facilities can be used for renovation planning in old residential areas in China. Implementing spongy facilities with a LID strategy for stormwater management can significantly enhance urban water resilience and improve ecosystem services.
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