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承灾体脆弱性的高低对农业旱灾的大小起着关键的作用,降低承灾体的脆弱性是抗灾减灾的有效途径。以县级行政区域为单位,选取水稻效率指数、应灾能力指数、水稻暴露指数,构建了四川省水稻干旱灾害承灾体脆弱性指标评价体系;采用层次分析法确定指标权重,计算四川省水稻干旱灾害承灾体脆弱性指数;利用GIS空间分析功能,生成了四川省水稻干旱灾害承灾体脆弱性精细空间分布图。结果表明:四川省水稻干旱灾害承灾体脆弱性指数值I V>0.70的区域主要分布在川西高原的康定和马尔康西北部地区,I V<0.30的区域主要在川南西昌的西部。随着水稻生产效率和应灾能力的提高,全省I V<0.30的区域明显在增大,而在川西高原康定和马尔康的西北部,I V>0.70的区域在增大,主要是由该区域的水稻种植面积在加大,水稻暴露性指数在增大所造成。
The vulnerability of disaster-bearing bodies plays a key role in the size of agricultural droughts. Reducing the vulnerability of disaster-tolerant bodies is an effective way for disaster prevention and reduction. Taking the county-level administrative regions as a unit, the rice efficiency index, disaster-response ability index and rice exposure index were selected to construct the evaluation index system of vulnerability index of disaster-bearing body of rice drought disaster in Sichuan Province. The index weight was determined by AHP, Using GIS spatial analysis function, a detailed spatial distribution map of vulnerability of disaster-bearing bodies of rice drought disaster in Sichuan Province was generated. The results showed that the areas of vulnerability index I V> 0.70 in Sichuan Province were mainly distributed in the northern part of Kangding and Malcon of western Sichuan Plateau. The areas with I V <0.30 were mainly located in the west of Xichang, southern Sichuan. With the improvement of rice production efficiency and resilience, the area of IV <0.30 in the whole province obviously increased, while the area of IV> 0.70 in the northwest of Kangding and Malkang of western Sichuan increased, mainly due to the increase of Rice planting area is increasing, rice exposure index is caused by the increase.