Risk Zoning of Drought Disaster Based on AHP and GIS in Yunnan Province
In order to improve the drought disasters risk assessment and emergency management capability of Yunnan, based on the natural disaster risk theory, a risk drought disaster assessment model, in which four indexes including the hazard of the disaster-causing factors, vulnerability of disaster-prone environment, exposure of drought disaster -affected bodies and the ability of disaster prevention and reduction are considered, is established by considering the comprehensive effect of meteorology, geographical environment and social factors. The AHP method is used to calculate the weight of each evaluation index and the drought disaster risk degree zoning map is drawn based on ArcGIS. The results show that:the drought disaster risk zone is spatially distributed in"sheet" shape, that in northeast and southeast is higher than that in northwest and southwest;the high and sub-high drought disaster risk areas contain Zhaotong, Huize in northeast of Yunnan and Luxi, Guangnan in southeastern of Yunnan. Dali, Baoshan and most of the central areas are medium risk areas; the low and sub-low risk areas contain Gongshan, Weixi in northwest of Yunan and Jinghong, Lancang in southwest of Yunnan. The result of comparing the evaluation result with the total economic losses of drought disaster areas shows that the model can reflect the damage characteristic of drought in Yunnan and provide advisory advices for further study of drought disaster risk assessment.
drought disasterrisk zoninganalytic hierarchy process (AHP)geographical information system (GIS)Yunnan Province
NETL
NSTL
万方数据
维普
