摘要
草原火灾是中蒙两国共同遭受的比较严重的自然灾害之一。针对中蒙边境地区的草原火灾,以内蒙古东乌珠穆沁旗及接壤的蒙古国三个苏木为研究区,采用2000-2014年的MCD45A火烧迹地产品,利用GIS空间分析方法对中蒙边境地区草原火的时空分布特征进行分析研究。研究结果表明:近15年研究区过火迹地空间分布广泛,而研究区总过火面积的95%分布在蒙古国境内。每个像元上的过火频次较高,最高在蒙古国的哈拉哈郭勒苏木境内,过火频次达到15年内同一个像元上发生7次。而中国的东乌珠穆沁旗境内却没有该现象。研究区过火面积的年际变化表明,2000-2008年呈减少趋势,2008-2014年呈增加趋势。由旬变化可知,4-6月是蒙古国过火面积最大的月份,而10月至来年4月是东乌珠穆沁旗过火面积最大的月份。
Grassland fire is one of the serious natural disasters suffered both in China and Mongolia. In view of the grassland fire occurred in 3 banner of East Ujimqin banner in China and adjacent Mongolia as research area,the spatiotemporal characteristics was analyzed by GIS space analysis method and using the 2000- 2014 MCD45 A burned products. The study results indicated that recent 15 a,the burned area distributed widely and 95% of the total area of the study area located in the territory of Mongolia,with the highest rate of 7 in Khalkhgol. But East Ujimqin Banner has not happened it. The annual variation trend of the burned area showed that the downward trend happened in 2000- 2008,and upward trend in 2008- 2014. Known by ten days change,the period that biggest burned area takes place in Mongolia is from April to June,and in East Ujimqin from October to next year April.
出处
《灾害学》
CSCD
2016年第3期207-210,共4页
Journal of Catastrophology
基金
国家自然科学基金(41561099)
国家自然科学基金应急管理项目(61550005)
内蒙古自治区博士基金(2015BS0505)
国家科技支撑计划课题(2013BAK05B00)
关键词
中蒙边境
草原火灾
MCD45A
时空分布
China-Mongolia border
grassland fire disaster
MCD45A
spatiotemporal characteristic
