An improved MCDM combined with GIS for risk assessment of multi-hazards in Hong Kong
An improved MCDM combined with GIS for risk assessment of multi-hazards in Hong Kong
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DOI：
10.1016/j.scs.2023.104427
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发表时间：
2023-01
影响因子：
11.7
通讯作者：
Haifang Lyu;Z. Yin
中科院分区：
文献类型：
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作者：
Haifang Lyu;Z. Yin
香港经常遭受多种灾害，例如洪水、泥石流和暴雨引发的山泥倾泻。提出了一种将区间数与模糊层次分析法相结合的改进多准则决策方法。为了说明改进的MCDM方法的有效性，将AHP、区间FAHP和分析网络过程（ANP）结合到地理信息系统（GIS，简称AHP-GIS、区间FAHP-GIS和ANP-GIS）中，以评估多灾害（例如，洪水、泥石流和山体滑坡）。综合风险评价结果表明，洪水、泥石流和滑坡高风险区的比例分别超过15%、17%和18%。结果表明，MCDM方法考虑了多准则对多危险的贡献。不同的评价因子对不同的多灾种风险的重要程度不同。结果表明，区间FAHP-GIS比AHP-GIS和ANP-GIS更能准确地捕捉高风险区域。区间FAHP-GIS方法采用区间模糊数代替AHP-GIS中的明确数来反映评价因素的重要程度，提高了多风险评价的准确性。
Hong Kong frequently suffers from multi-hazards such as floods, muddy-water flows and landslides induced by rainstorms. This study presents an improved multi criteria decision making (MCDM) approach with integrating the interval numbers into fuzzy analytical hierarchy process (FAHP) to assess multi-hazard risks. To illustrate the efficiency of the improved MCDM method, the AHP, interval-FAHP and analytical network process (ANP) were incorporated into a geographical information system (GIS, abbreviated as AHP-GIS, interval-FAHP-GIS, and ANP-GIS) to assess the risks of multi-hazards (e.g., floods, muddy-water flows, and landslides) in Hong Kong. The assessed multi-risks indicated that the percentages of areas with a high risk of flood, muddy-water flow, and landslide were more than 15%, 17%, and 18%, respectively. The results demonstrated that MCDM methods considered multi-criteria contributions on multi hazards. Different assessment factors contributed different importance on different multi-hazard risks. The comparison indicates that interval-FAHP-GIS perform better than AHP-GIS and ANP-GIS in capturing high-risk areas. The interval-FAHP-GIS method adopts interval fuzzy numbers instead of crisp numbers in AHP-GIS to reflect the degree of importance of assessment factors, which increases the accuracy of the assessed multi-risks.