Agricultural drought disaster risk assessment in China based on the regional disaster system theory
As the core content and key element identified in the practice of drought risk management,it has become a hot-button issue on how to properly assess the drought risk in the research field.To promote the scientific and technological process of drought management,the principle of drought risk assessement ased on the regional disaster system theory has been clarified,and the risk of agricultural drought disaster in the whole country has been evaluated with the fuzzy evaluation method.The results show that the drought hazard and exposure exhibits obvious regional pattern.The drought hazard in Northwest is the biggest,followed by the North China Plain,Northeast,the lower reach of YangtzeRiver,Southwest and South China.Compared with other areas,the drought exposure in North China Plain,the lower reach of Yangtze River and Northeast,are relatively higher.The prefecture-level cities located in the second terrace are more vulnerable to agricultural drought.Generally speaking,the agricultural drought risk is higher in north than in the south,and risk in mid-eastern China is higher than in thewest.The agricultural drought risk in Northeast,North China Plain,eastern part of Northwest and northern part of the lower reach of Yangtze river are relatively higher.
regional disaster system theoryagricultural droughtdisaster risk assessment
国家科技期刊平台
NSTL
万方数据
维普
