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Assessment of Rain Garden Effects for the Management of Urban Storm Runoff in Japan

Author

Listed:
  • Linying Zhang

    (School of Architecture, Nanjing Tech University, Nanjing 211800, China
    Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-Ku, Kyoto 606-8501, Japan)

  • Zehao Ye

    (Suzhou Erjian Construction Group Co., Ltd., Suzhou 215012, China)

  • Shozo Shibata

    (Graduate School of Global Environmental Studies, Kyoto University, Yoshida-Honmachi, Sakyo-Ku, Kyoto 606-8501, Japan)

Abstract

Storm runoff is a growing concern against a background of increasing urban densification, land-use adaptation and climate change. In this study, a storm water management model was used to analyze the hydrological and water-quality effects of rain gardens (also known as bioretention cells) as nonpoint source control solutions in low-impact development (LID) practices for an urban catchment in the Nakagyo Ward area of Kyoto in Japan. The results of simulations with input involving Chicago hyetographs derived for different rainfall return periods (referred to as 3 a, 5 a, 10 a, 30 a, 50 a and 100 a) indicated the effectiveness of this arrangement, in particular for rainstorm 3 a, which exhibited the maximum contaminant reduction ratio (Total Suspended Solids (TSS) 15.50%, Chemical Oxygen Demand (COD) 16.17%, Total Nitrogen (TN) 17.34%, Total Phosphorus (TP) 19.07%) and a total runoff reduction volume of 46.56 × 106 L. With 5 a, the maximum number of flooding nodes was reduced to 87, demonstrating that rain gardens handle rainfall effectively over a five-year return period. There was a one-minute delay for 100 a, which again indicates that rain gardens support control of urban runoff and mitigate flooding. Such gardens were associated with reduced stormwater hazards and enhanced resistance to short-term rainstorms at the research site, and should be considered for urban planning in Kyoto and other cities all over the world.

Suggested Citation

  • Linying Zhang & Zehao Ye & Shozo Shibata, 2020. "Assessment of Rain Garden Effects for the Management of Urban Storm Runoff in Japan," Sustainability, MDPI, vol. 12(23), pages 1-17, November.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:23:p:9982-:d:453352
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    Citations

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    Cited by:

    1. Bikram Manandhar & Shenghui Cui & Lihong Wang & Sabita Shrestha, 2023. "Urban Flood Hazard Assessment and Management Practices in South Asia: A Review," Land, MDPI, vol. 12(3), pages 1-29, March.
    2. Ireneusz Nowogoński, 2021. "Runoff Volume Reduction Using Green Infrastructure," Land, MDPI, vol. 10(3), pages 1-24, March.
    3. Fatin Khalida Binti Abdul Khadir & Ng Cheng Yee & Husna Binti Takaijudin & Noor Amila Wan Abdullah Zawawi & Wesam Salah Alaloul & Muhammad Ali Musarat, 2023. "Evaluation of the Implementation of Sustainable Stormwater Management Practices for Landed Residential Areas: A Case Study in Malaysia," Sustainability, MDPI, vol. 15(13), pages 1-20, July.
    4. Mo Wang & Sijie Feng & Rana Muhammad Adnan Ikram & Tong Chen & Chuanhao Sun & Biyi Chen & Qiuyi Rao & He Jin & Jianjun Li, 2023. "Assessing the Performance and Challenges of Low-Impact Development under Climate Change: A Bibliometric Review," Sustainability, MDPI, vol. 15(18), pages 1-19, September.
    5. Kinga Kimic & Karina Ostrysz, 2021. "Assessment of Blue and Green Infrastructure Solutions in Shaping Urban Public Spaces—Spatial and Functional, Environmental, and Social Aspects," Sustainability, MDPI, vol. 13(19), pages 1-31, October.

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