摘要: |
针对海绵城市中观尺度的区域水系统综合评价问题,引入工程弹性的理念,构建了由生态弹性、工程弹性、自然弹性、社会弹性4个维度共17个影响因子的弹性指标体系,基于相对差异函数的模糊可变评价模型,对17个指标5个级别(极强、较强、中等、较弱、极弱)弹性阈值进行说明和界定。以开封市为研究实例进行评价计算,结果显示:2013年、2014年、2015年水系统弹性为Ⅴ级,表明这3年开封市的海绵城市水系统具有极弱的弹力;2016年、2017年为Ⅳ级,开封市海绵城市水系统弹性为中等。并对2013年、2017年的17个指标的相对隶属度覆盖等级进行变化对比,与开封海绵城市建设和成效进行对照分析,评价结果与实际情况高度吻和,均发生了明显的弹性增强过程。经过实例计算认为基于相对差异函数的海绵城市水系统弹性评价体系构建合理,针对中观尺度的评价区域,能够通过指标信息确定对应的相对隶属度,获得精准的评价结果,为海绵城市提高水系统弹性提供可靠的理论依据和数据支持。 |
关键词: 海绵城市 相对差异函数 水系统 弹性评价 开封市 |
DOI: |
分类号:TV213.9 |
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目) |
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Research on resilience evaluation of sponge city based on the relative difference function |
FENG Feng1, JIN Xiaoying1, XIEQiuhao2, MA Zhikun3
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1.Small Watershed Hydraulic Technology Research Center of Henan Provincial Colleges and Universities, Yellow River Conservancy Technical Institute;2.Hohai University, Nanjing 211100 China;3.Beijing Renchuang Sand Industry Technology co. LTD
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Abstract: |
Aiming at the comprehensive evaluation of sponge city water system, based on the concept of engineering elasticity, this paper constructs a resilient index system with 17 factors from four dimensions: ecological, engineering, natural and social resilience. Based on the fuzzy variable evaluation model of the relative difference function, the five levels (very strong, strong, medium, weak and very weak) of the resilience thresholds corresponding to the 17 indicators are explained and defined. The paper takes Kaifeng as the research example was calculated, the result shows: in 2013, 2014, 2015 water system resilience to Ⅴ suggests that this three years of Kaifeng water system has a very weak resilience; In 2016, 2017 to Ⅳ shows city water system for medium resilience. In addition, the change trend of relative membership coverage of 17 indicators in 2013 and 2017 was compared and analyzed, compared with the construction and effect of kaifeng sponge city, the evaluation results are highly concordant with the actual situation, and an obvious resilient enhancement process was found. Through the example verification, this paper has established a reasonable evaluation system and elastic threshold, aiming at the evaluation area of mesoscale, can determine the corresponding relative membership degree through the index information, so as to obtain accurate evaluation results, and provide reliable data support and theoretical basis for sponge city to improve the resilience of water system. |
Key words: Sponge city relative difference function water system resilience evaluation Kaifeng City |