摘要
以内蒙古58个牧业旗县为分析区域,以北方牧区频繁发生的旱灾为分析对象,从旱灾的致灾因子危险性着手,利用专家打分法和熵权系数法,确定致灾因子危险性分析的指标及其权重系数,建立牧区旱灾致灾因子危险性评估模型,运用GIS技术,完成内蒙古牧区旱灾致灾因子危险性区划。结果表明:旱灾致灾因子危险性中级以上区域约占分析区总面积的65%,致灾因子危险性高低与下垫面类型有一定的关系,总体上来看,草甸草原与典型草原区域旱灾致灾因子危险性较低,牧区干旱致灾因子危险性高危险及较高危险的区域主要分布在内蒙古荒漠草原和浑善达克沙地、毛乌素沙地、科尔沁沙地及其周边地区。
We take58animal husbandry banners/counties of Inner Mongolia as the research area,and the most frequent occurred disaster drought of pastoral areas as the research object,start from the drought disaster causing factor,determined the assessment indicator and its weights and established disaster causing factor risk assessment model by using the entropy weight coefficient and the analytic hierarchy process.At last,we completed the risk zoning of drought disaster causing factor in Inner Mongolia pastoral area by using GIS technology.The results show that Medium or higher areas than the Medium risk account for about65%of the study area,the risks of causing factors have a certain relationship with the underlying surface types,the risks of drought disaster causing factor in meadow steppe and typical steppe are lower,high risk and higher risk areas of drought causing factor in pastoral areas are mainly distributed in desert Steppe,Otindag sandy land,Mu Us sandy land,Horqin sandy land and its surrounding areas of Inner Mongolia.
作者
乌兰
Wu lan(Inner Mongolia Meteorological Institute, Inner Mongolia Hohhot 010051)
出处
《内蒙古气象》
2017年第3期25-28,共4页
Meteorology Journal of Inner Mongolia
基金
内蒙古气象局"内蒙古农牧业精细化气候区划"资助项目
关键词
内蒙古牧区
旱灾
致灾因子
区划
Inner Mongolia Pastoral Areas
Drought Disaster
Causing Factor
Zoning
