关键词: 稻瘟病发生程度, 稻瘟病发生程度, 气象等级, 预报模型

Abstract: The paper aims to provide decision basis for disaster prevention and reduction, and to serve the local economy by comprehensive analysis of the disaster type and degree. The authors researched and evaluated Shiyang River Basin’ meteorological disasters and their characteristics by using meteorological disasters census data from 1984 to 2013 in Wuwei. The results showed that the meteorological disasters mainly included freezing injury, drought and gale sandstorms in nearly 30 years,and the economic losses were not proportional to the number of disasters. Economic losses caused by disasters (except drought) showed an upward trend in fluctuations excluding price and currency appreciation rates. Considering the change in gross domestic product (GDP), the losses trend declined in fluctuations. By using ‘scatter’ method to obtain meteorological disaster losses composite index, the authors graded the index by variable deviation and clustering analysis method, evaluation results were basically the same and fully consistent with the fact.