Journal of Tropical Oceanography ›› 2023, Vol. 42 ›› Issue (5): 17-29.doi: 10.11978/2022092CSTR: 32234.14.2022092

Special Issue: 全球变化专题

• Marine Meteorology • Previous Articles     Next Articles

Assessment of tropical cyclone disaster risk based on the Bayesian network and GIS

TIAN Cheng1(), LI Xin1(), DU Yang1, LI Ming1, XIE Yong2, XIA Jilu3   

  1. 1. College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410005, China
    2. Jiangxi Meteorological Bureau, Nanchang 330008, China
    3. 95903 Troop Meteorological Observatory, Wuhan 430000, China
  • Received:2022-04-29 Revised:2022-07-12 Online:2023-09-10 Published:2022-07-19
  • Supported by:
    National Natural Science Foundation of China(41605051); National Natural Science Foundation of China(41976188); Key Research Program of National University of Defense Technology(ZK17-02-010)

Abstract:

To address the complexity and uncertainty of tropical cyclone disaster, this study proposes a new tropical cyclone disaster risk assessment model based on the Bayesian network and geographic information system (GIS). The model can automatically explore the causal relationships among disaster influencing factors from objective historical data, and express them in the form of probabilities to assess and predict uncertain disaster risks. Based on the historical data of tropical cyclone disaster in three southeastern coastal provinces (Guangdong, Fujian, and Zhejiang) of China from 1980 to 2016 for risk assessment experiments, a total of 12 assessment indicators in three aspects, i.e., hazard of disaster-causing factors, sensitivity of disaster-inducing environment, and vulnerability of disaster-bearing bodies, were selected as model inputs, and direct economic losses were quantified as disaster risk levels as model outputs to construct a Bayesian network-based risk assessment model. The model was then tested against cyclone disaster data from 2017 to 2021, and the accuracy of the assessment prediction was 80.75%. The relative errors of very low, low, medium, high and very high risks predicted by the model were 27.72%, 8.45%, 18.58%, 16.52%and 19.12%, respectively, and the zonal results of risk prediction values were highly consistent with the actual disaster loss distribution in terms of spatial patterns. In addition, the assessment construction method was applied to the risk assessment of individual cases of Typhoon “Meranti”. The results showed that the high and very high risk areas assessed by the model were basically consistent with the actual disaster reports. Thus, the tropical cyclone disaster risk assessment model established in this study has high accuracy and credibility, and provides a new methodological approach and technical support for tropical cyclone disaster risk assessment.

Key words: tropical cyclone disaster, risk assessment, three southeastern coastal provinces, Bayesian network, GIS