基于元胞自动机的低影响开发对城市内涝削减效果模拟
低影响开发措施是解决城市内涝问题的重要途径。为评估其对城市内涝的防控效果,论文以福建省长汀县县城为研究案例,提出适宜在研究区开展的透水铺装、下凹式绿地、雨水罐等低影响开发措施方案,利用基于元胞自动机模型的城市内涝模型进行模拟,并通过验证发现元胞自动机模型可有效模拟城市内涝过程。对比低影响开发改造前后的内涝情况,结果显示:1)低影响开发措施能使内涝积水总量削减超过50%,暴雨重现期越长对内涝现象的削弱效果越低;2)通过分析改造前后内涝积水区的空间格局及变化特征,可见大部分内涝积水区在改造后积水削减幅度较大,卧龙山北部及汀江干流左岸的积水区内涝情况改善幅度较小;3)低影响开发改造削减效果最好的为积...
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Published in | 自然资源学报 Vol. 32; no. 7; pp. 1158 - 1169 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
南京大学地理与海洋科学学院,南京,210023%南京大学建筑与城市规划学院,南京,210093
2017
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Subjects | |
Online Access | Get full text |
ISSN | 1000-3037 |
DOI | 10.11849/zrzyxb.20160718 |
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Summary: | 低影响开发措施是解决城市内涝问题的重要途径。为评估其对城市内涝的防控效果,论文以福建省长汀县县城为研究案例,提出适宜在研究区开展的透水铺装、下凹式绿地、雨水罐等低影响开发措施方案,利用基于元胞自动机模型的城市内涝模型进行模拟,并通过验证发现元胞自动机模型可有效模拟城市内涝过程。对比低影响开发改造前后的内涝情况,结果显示:1)低影响开发措施能使内涝积水总量削减超过50%,暴雨重现期越长对内涝现象的削弱效果越低;2)通过分析改造前后内涝积水区的空间格局及变化特征,可见大部分内涝积水区在改造后积水削减幅度较大,卧龙山北部及汀江干流左岸的积水区内涝情况改善幅度较小;3)低影响开发改造削减效果最好的为积水深度低于0.2 m的区域,其次为积水深度高于0.5 m的区域,对积水深度处于0.2~0.5 m的区域削减效果并不明显。研究表明低影响开发措施可有效控制城市的内涝灾害。 |
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Bibliography: | Low Impact Development(LID) is an important measure to solve urban waterlogging problem. To assess prevention and control effect of LID on urban water-logging, the urban area of Changting County in Fujian Province is taken as a case for study. Proper measures of LID for this area, including porous pavement, low elevation greenbelt and rainwater tanks, are proposed. The runoff generation module of SCS model and urban waterlogging model based on Cellular Automaton(CA) model are used for simulation and verification. Results show that the urban water-logging model based on CA can simulate the process of urban water-logging effectively under the complex underlying surface scenarios of urban area. By comparing the water-logging simulation results before and after implementation of LID measures, the following conclusions can be drawn: 1) LID measures can reduce waterlogging amount by over 50% under condition of different return period, and the reduction effect decline when the return period of storm is longer. 2) Th |
ISSN: | 1000-3037 |
DOI: | 10.11849/zrzyxb.20160718 |