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采用改进的基于扩散函数的内集-外集模型,分析1949—2007年辽宁省旱灾受灾指数,评价辽宁省的旱灾风险。结果表明,辽宁省旱灾发生频繁,平均每1.7 a一遇且严重干旱多发,这与辽宁省旱灾的实际情况基本吻合。研究表明,内集-外集模型计算结果的意义清楚,对防灾减灾有一定指导作用。
Using the improved inner-set-outer set model based on the diffusion function, the index of drought disaster in Liaoning Province from 1949 to 2007 was analyzed to evaluate the drought risk in Liaoning Province. The results showed that the frequent occurrence of drought in Liaoning Province occurred on an average every 1.7 years with severe drought, which was basically in line with the actual situation of drought in Liaoning Province. The research shows that the meanings of the results calculated by the inner-outer-outer model are clear, which can guide disaster prevention and mitigation.