杨寿泉,闻平,姜沣珊,徐佳瑞,解智强,张弓

• 1:云南大学国际河流与生态安全研究院
• 2:中国电建集团昆明勘测设计研究院有限公司
• 3:云南大学地球科学学院
• 4:中煤(西安)地下空间科技发展有限公司

摘要(Abstract)：

【目的】绿色屋顶等LID设施的空间布局差异会对城市洪涝灾害的削减效果产生不同的影响。为解决绿色屋顶在城市规划中具体空间形态的优化问题，【方法】通过设置随机分布、沿道路分布和沿积水点分布等3种绿色屋顶空间布局方案，利用SWMM模拟其对洪涝径流和积水特征的影响，并利用熵权-TOPSIS法综合评价出最优方案，实现绿色屋顶的空间布局优化。【结果】结果显示：(1)在相同绿色屋顶覆盖率下，不同空间布局的绿色屋顶对地表径流都具有较好的削减作用，对径流总量和峰值的最大削减率能够达到23.99%和39.12%。(2)不同空间布局对洪涝积水的影响差异明显，其中沿积水点分布布局的削减效果总体上要优于其他方案，该方案平均积水时间最多削减15.18%,积水节点最多减少69.19%,最长积水时间最多缩短10.98%,严重积水节点最多减少48.08%。(3)沿积水点分布布局的TOPSIS评分在多种情景下的总得分分别为0.663、0.685、0.526和0.594,均为得分最高的方案。【结论】结果表明：不同空间布局的绿色屋顶方案对地表径流总量的影响差距不明显，差值在2%以内，难以据此进行布局优化；凭借空间位置差异，沿积水点分布布局对洪涝积水的削减效果明显优于其他方案，在相同绿色屋顶覆盖率情况下能够更好地减弱洪涝的不良影响；沿积水点分布布局可以作为研究区绿色屋顶布局规划的参考方案，具有研究区类似下垫面特征和城市建设规划的地区，在开始进行绿色屋顶铺设时，可以优先在积水严重区域布设，形成沿积水点分布的空间布局，获取较好的洪涝削减效果，后续规划时再向其他区域扩张。

关键词(KeyWords)： 绿色屋顶;空间布局;城市洪涝;布局优化;昆明市;LID;SWMM;径流

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41961064);; 2022年度云南大学产教融合研究生联合培养基地项目(CZ22622203);; 长江水利委员会长江科学院2022年开放研究基金(CKWV20221029/KY);; 教育部2021年产学合作协同育人项目(202102204028);; 云南大学第一届专业学位研究生实践创新项目(2021Y034)

作者(Author): 杨寿泉,闻平,姜沣珊,徐佳瑞,解智强,张弓

DOI: 10.13928/j.cnki.wrahe.2023.04.002

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