基于灰色关联度的气象因子与雪灾灾情相关性分析
2015-07-13杨征胡卓玮王志恒
杨征 胡卓玮 王志恒
摘要对锡林郭勒盟地区1960~2000年典型的雪灾年和非雪灾年的灾情资料进行分析,通过对每次的牧区雪灾灾害赋值得到了灾情指数,并采用灰色关联分析的方法定量分析了牧区积雪深度、积雪时间、气温3个气象因子与雪灾灾情的相关性。结果表明,研究区气象因子与雪灾灾情的关联程度从高到低依次为积雪深度、积雪时间和气温。
关键词雪灾;灰色关联度;气象因子;锡林郭勒盟
中图分类号S427文献标识码A文章编号0517-6611(2015)07-099-05
The Correlation Analysis between Meteorological Factors and Snow Disaster Based on Gray Correlation Method
YANG Zheng1, HU Zhuo-wei2, 3, 4, WANG Zhi-heng2, 3, 4
(1. Information Center of Ministry of Land and Resources of Peoples Republic of China, Beijing 100812; 2.College of Resources Environment and Tourism, Capital Normal University, Beijing 100048; 3. Beijing Municipal Key Laboratory of Resources Environment and GIS, Beijing 100048; 4. Laboratory of 3D Information Acquisition and Application, MOST, Beijing 100048)
AbstractThe data of typical snow disaster year and non snow disaster year in Xilin Gol League during 1960-2000 was analyzed. The disaster index was obtained. Grey correlation method was adopted to quantitively analyze relationship between snow depth, time, temperature and snow disaster. The results showed that the order of correlation between meteorological factors and snow disaster is as following: snow depth>time>temperature.
Key wordsSnow disaster; Gray correlation; Meteorological factor; Xilin Gol League
雪灾是我国冬春季节最主要的自然灾害[1-2],在我国西部牧区经常发生,尤其是内蒙古、新疆、青海和西藏等地的牧区几乎每年都会发生,造成大量的经济损失,给我国的畜牧业造成重大危害[3-5]。深入分析和研究雪灾灾害,实时得到牧区雪灾临灾和发灾时的灾害范围和灾害强度,做好充分的防灾减灾和救灾的准备,最大程度地减轻雪灾的损失,对牧区的发展和牧民生活的保障具有十分重要的现实意义。
为此,笔者在分析内蒙古锡林郭勒盟多年雪灾气象资料的基础上,应用灰色关联分析的方法定量分析了研究区内典型气象因素(积雪深度、积雪时间和气温)与雪灾灾情的相关性,旨在为建立锡林郭勒盟地区雪灾危险性评价指标体系提供理论依据。
1材料与方法
1.1研究区概况
锡林郭勒盟地处115°13′~117°06′ E,43°02′~44°52′ N,位于我国的正北方,内蒙古自治区的中部,驻地锡林浩特市。该区既是国家重要的畜产品基地,又是西部大开发的前沿,是距京、津、唐等地最近的草原牧区,属北部温带大陆性气候,其行政区划见图1。研究……
