Study On Hainan Island Typhoon Effects On Rubber And Division Of Risk Assessment Based On RS And GIS

Hainan Island is located in the tropics, known as "typhoon corridor", each landfall typhoon will effect the economic development and people's live, the most effection on agricultural production. Hainan Island has the superior environmental conditions to the development of rubber plantations, but the climate vulnerability of rubber production is significant, the course of rubber production is very sensitivity to the change of climate, typhoon effects the production of rubber in Hainan Island seriously every year. Therefore, this article selected Hainan Island as the research area, based on the formation of environmental background in the rubber and typhoon disasters databases, used RS and GIS technologies considering the typhoon precipitation, wind and terrain and the topography factors, and combined statistical method with natural disaster Risk Assessment Technology, Assesed and planed the typhoon risk of rubber plantations in Hainan Island.Through research, the main conclusions obtained are as follows:(1) The damage hazard risks are mainly distributed as follows: The highest-risk areas are mainly located in higher frequency of typhoon Qionghai and Wenchang and other east coast places. Higher risk areas are mainly located Wuzhishan, most part of Ledong, Baoting and most part of the western of Sanya. Medium risk area is located in the eastern Sanya and Baoting, Wanning, Lingshui, Qiongzhong, southeast of Dongfang and central regions Chengmai; less risk area are located in the north of Haikou, Chengmai, Tunchang, Qiongzhong, Dongfang, Baisha, Dongfang and other regional and local cities and counties in Sanya, Lingshui and Baoting. Low risk areas are located in central and western mountain district which are protected by coastal cities and counties.(2) Sensitivity point of view from the typhoon of rubber, rubber typhoon affected by the terrain big difference in the same region may be due to terrain, high-sensitive areas can coexist with low-sensitive areas. Sensitivity area distribution: Low-risk area are located in Changjiang,Lingao,Haikou,Dingan, Danzhou; Less sensitive areas of the distribution area: Changjiang,Baoting,Wuzhishan,Lingshui,Wenchang; Medium-sensitive area of distribution: Lingshui,Ledong,Sanya,Changjiang,Wanning Baoting; Higher sensitive area Distribution: Changjiang,Dongfang,Wuzhishan,Danzhou,Baoting; The Highest sensitive area of distribution:Changjiang,Dongfang,Wuzhishan,Danzhou,Qiongzhong.(3) The highest vulnerability disaster zone distribution of rubber planting the largest area in Danzhou.Higher and easy Damaged areas are mainly located in Qinghai, Qingzhong, Baisha; Medium vulnerability located in Wanning, Haikou, Chengmai, Ding'an, Lingao; lower vulnerability area is located in Wenchang, Baoting, Tunchang Low vulnerability distribution mainly in Sanya,Dongfang.(4) The distribution of disaster prevention and mitigation capabilities: It is located in the largest rubber planting of Danzhou and Ledong; Higher resilience area is located in Qionghai, Haikou, Lingao; Medium-disaster mitigation areas mainly Wenchagn, Wanning, Changjiang; The lower areas of disaster mitigation area are included Linshi, Tunchang, Qingzhong, Wuzhishan, Baoting and other cities.(5) As a whole,the typhoon affected of rubber lower risk of Hainan Island area is 853.44 (km~2), 20.43% of the total study area; low risk1002.15(km~2), 23.99% of the total land; Medium risk area 1042.17(km~2), of the total land 24.95%; Higher risk area is 976.49(km~2), 23.38% of the total land area;The Highest-risk area is 302.82(km~2), 7.25% of total land; The size of risk zone distributed in each cityand couty ranged from small to large:Linshui