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<p>Taiwan’s Urban Design Guidelines have incorporated source control measures, including the curbside striped open spaces installing permeable pavements of residential building lots, as part of stormwater management strategies to mitigate urban flooding. This study evaluates the flood mitigation effectiveness and equity of peak flow allocation associated with these design elements. Focusing on a 63.09&#xa0;ha residential area in Danhai New Town, New Taipei City, where residential land accounts for 78.24%, and the Storm Water Management Model (SWMM) was applied under various rainfall return periods to simulate peak runoff from 173 building lots. Results demonstrated that the curbside striped open spaces installing permeable pavements of residential building lots can reduce peak flows under different storm scenarios. However, current design standards overlook variations in lot size, geometry, and spatial arrangement, resulting in uneven distribution of flood mitigation benefits. This study recommends enhancing the Urban Design Guidelines by requiring permeable pavements in all non-building spaces and increasing water retention capacity, especially in larger area lots, to improve flood resilience and promote equitable runoff distribution.</p>

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A study on the curbside striped open spaces installing permeable pavements of building lots according to Taiwan urban design guidelines: implications for flood mitigation and peak flow allocation

  • 期刊论文

  • 发表日期：

    2025年7月22日

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  • Jin-Cheng Fu,
  • Chuan-Ming Tung

摘要

Taiwan’s Urban Design Guidelines have incorporated source control measures, including the curbside striped open spaces installing permeable pavements of residential building lots, as part of stormwater management strategies to mitigate urban flooding. This study evaluates the flood mitigation effectiveness and equity of peak flow allocation associated with these design elements. Focusing on a 63.09 ha residential area in Danhai New Town, New Taipei City, where residential land accounts for 78.24%, and the Storm Water Management Model (SWMM) was applied under various rainfall return periods to simulate peak runoff from 173 building lots. Results demonstrated that the curbside striped open spaces installing permeable pavements of residential building lots can reduce peak flows under different storm scenarios. However, current design standards overlook variations in lot size, geometry, and spatial arrangement, resulting in uneven distribution of flood mitigation benefits. This study recommends enhancing the Urban Design Guidelines by requiring permeable pavements in all non-building spaces and increasing water retention capacity, especially in larger area lots, to improve flood resilience and promote equitable runoff distribution.