小空间尺度农业旱灾承灾体脆弱性评价初探——以湖南省常德市鼎城区双桥坪镇为例

A Primary Study on Evaluating Disaster Bearing Body's Vulnerability to Agricultural Droughts under Small Spatial Scale: A Case Study of Shuangqiaoping Town in Changde City

该文探讨小空间尺度农业旱灾承灾体脆弱性评价,阐述针对不同空间尺度建立不同的旱灾承灾体脆弱性评价指标体系的必要性。基于湖南省常德市双桥坪镇的实地调查资料,构建包括耕地平坦指数、水塘灌溉指数等评价指标体系,通过比较各因素的相对重要性确定其权重,对2001年双桥坪镇16个村农业旱灾承灾体脆弱度进行评价。结果表明,该镇旱灾脆弱度较高,西部村庄的旱灾脆弱性普遍小于东部村庄。用同年的实际旱灾灾情损失资料进行验证,吻合程度较高。

Drought is one of the natural disasters,which severely influences the agricultural production of China.This paper tried to find the way in which the disaster bearing body's vulnerability to agricultural drought under small spatial scale could be evaluated.First,it analyzed the causes of constructing different index-systems under different spatial scales,and built an index-system under the small spatial scale including indexes such as land flatness,pond capacity for irrigating and so on,based on the investigating materials of Shuangqiaoping Town.Then,the weight of each index was given by comparing the index's relative importance,and the disaster bearing body's vulnerability to agricultural drought of 16 villages in Shuangqiaoping Town in 2001 was worked out.The result shows that this town has a high vulnerability to agricultural drought.The villages lying in the west of the town have smaller vulnerability than the villages lying in the east.This result tallies the local actual loss to agricultural droughts.The idea of constructing index-systems under small spatial scales has been proved necessary and feasible.