Abstract:In order to better reveal the distribution law of typhoon disaster risk in Hainan Island, coupled with the risk factors of disaster pregnant environment and disaster causing factors, the comprehensive risk assessment model of typhoon disaster in Hainan Island was constructed by using typhoon data from 1980 to 2019 in Hainan Island, and the comprehensive risk assessment model was divided into 4 years according to 10-year interval.The results show that:(1) The spatial sensitivity of disaster pregnant environment has a decreasing trend from the eastern and southwestern coastal areas to the inland.Most of them are medium and low sensitive areas, accounting for 30.88% of the total area, and the high sensitive areas are 1495.02km2, accounting for 4.42%.(2)The results show that the hazard degree of disaster is increasing, decreasing and increasing with time, and the spatial distribution is decreasing gradually from coastal to inland.From 2000 to 2009, the area with low risk degree of disaster causing factors was the widest, with an area of 25624.85km2, accounting for 75.7%. From 2010 to 2019, the scope with high risk degree of disaster causing factors was the widest, accounting for 34.78% of the total area.(3)The comprehensive risk of typhoon disaster shows a decreasing - increasing trend with time, and it has the characteristics of decreasing from the northeast and southwest coastal areas to the central inland and northwest coastal areas.From 2000 to 2009,the comprehensive risk index was the lowest, accounting for 29.61%.From 2010 to 2019, the comprehensive risk index was the highest, accounting for 42.08%.(4)The high value areas of comprehensive risk of typhoon disasters are mainly distributed in Wenchang and Lingshui in the East and southwest coastal areas; the median areas are distributed in 6 cities and counties such as Wanning and Baoting along the coast and inland; the low value areas are distributed in the six cities and counties from the central inland to the northwest, such as Wuzhishan and Lingao.With the development of social economy, the task of preventing and controlling typhoon disasters will be more arduous.
