Assessment of provincial waterlogging risk based on entropy weight TOPSIS–PCA method

• Published in: Natural hazards (Dordrecht) Vol. 108; no. 2; pp. 1545 - 1567
• Main Authors: Liu, Zaohong, Jiang, Zhangzejun, Xu, Chen, Cai, Guanjun, Zhan, Jian
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.09.2021; Springer Nature B.V
• Subjects: Civil Engineering; Disaster management; Disasters; Earth and Environmental Science; Earth Sciences; Economics; Emergency preparedness; Entropy; Environmental Management; Evaluation; Floods; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Hydrogeology; Investment; Natural Hazards; Original Paper; Principal components analysis; Risk levels; Technological change; Technology assessment; Waterlogging; Weight; Waterlogging risk assessment; Coupled entropy weight TOPSIS–PCA model; Evaluation indicators; Entropy weight TOPSIS method; Principal component analysis
• ISSN: 0921-030X; 1573-0840
• DOI: 10.1007/s11069-021-04744-3

Over the past few years, urban waterlogging disasters have caused serious losses to the national economy of China; therefore, creating technology for assessing waterlogging risk levels has become an important goal. Based on 25 post-screened evaluation indexes regarding the construction of waterlogging facilities, social and economic developments, and investments in scientific and technological innovation, the capacity of 31 provinces to prevent and mitigate waterlogging was comprehensively evaluated. The scores of six principal component factors were calculated by using the entropy weight TOPSIS method, and the coupled entropy weight TOPSIS–principal component analysis evaluation model was established. Moreover, in accordance with the evaluation results, measures for waterlogging prevention and disaster reduction are proposed. The results show that Beijing, Shanghai and Tianjin are the top three provinces regarding the capacity to control floods and mitigate disasters; this agrees well with the actual flood drainage standards and disaster losses of all provinces.