Abstract
Typhoons are an environmental threat that mainly affects coastal regions worldwide. The interactive effects of natural and socioeconomic factors on the losses caused by typhoon disasters need further examination. In this study, GeoDetector was used to quantify the determinant powers of natural and socioeconomic factors and their interactive effects on the rate of house collapse in Guangdong and Guangxi Provinces of southeast China caused by Typhoon Mangkhut in 2018. We further identify the dominant factors that influenced the disaster losses. The local indicators of spatial association method was then introduced to explain the spatial heterogeneity of the disaster losses under the influence of the dominant factor. The results indicate that both natural and socioeconomic factors significantly affected the house collapse rate. The maximum precipitation was the dominant factor, with a q value of 0.21, followed by slope and elevation, with q values of 0.17 and 0.13, respectively. Population density and per capita gross domestic product had q values of 0.15 and 0.13, respectively. Among all of the interactive effects of the influencing factors, the interactive effect of elevation and the ratio of brick-wood houses had the greatest influence (q = 0.63) on the house collapse rate. These results can contribute to the formulation of more specific safety and property protection policies.
Highlights
Typhoons are one of the most frequent and severe natural hazards that occur worldwide (Peduzzi et al 2012; Mei et al 2015)
Among all the interactive effects of any two factors, the maximum is 0.63 (EV and ratio of brick-wood houses (RB)), indicating that the interactive effects of EV and RB on the house collapse rate were the strongest, followed by maximum precipitation (MP) and population density (PD), and MP and EV, with q values of 0.61 and 0.60, respectively, indicating that strong precipitation combined with other influencing factors significantly affected the house collapse rate. These results suggest that the interactive effects of two factors will strengthen the impact on house collapse
The influences of natural and socioeconomic factors on the rate of house collapse caused by Typhoon Mangkhut in Guangdong and Guangxi Provinces were quantified by GeoDetector, along with their interactions
Summary
Typhoons are one of the most frequent and severe natural hazards that occur worldwide (Peduzzi et al 2012; Mei et al 2015). They cause losses of life and property, and have major socioeconomic effects on coastal areas (Lin et al 2015; Yan et al 2016). The eastern coastal area of China is a sensitive ecological environment, and frequently experiences climatic anomalies and catastrophic natural phenomena caused by global warming and rising sea levels (Huang and Cheng 2013; Xu et al 2016).
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