内蒙古锡林郭勒草原雪盖与植被覆盖重叠关系的遥感分析

A Study on the Spatial Overlaying Relationship Between Winter Snow Cover and Vegetal Cover in Xilin Gole Steppe of Inner Mongolia by Using Remote Sensing Data

本文以内蒙古锡林郭勒草原中部锡林浩特市地区为研究区，应用陆地资源卫星ＴＭ影像资料，编绘出１：５０万植被图；应用１９９２年１２月２８日的ＮＯＡＡ气象卫星ＡＶＨＲＲ数据，结合地面准同步实测雪深数据及有关气象台站的记录，绘制出雪盖分布范围和积雪深度图。在对雪盖图和植被图叠加分析的基础上，得出１９９２年冬季研究区积雪掩埋牧草高度等级图。在此基础上，探讨了积雪分布和草场植被结构的空间重叠对应关系，为牧区积雪灾害危险性评价提供了科学依据。

Winter snow cover is an important ecological factor influencing animal husbandry de－velopment of the temperate steppe． This paper selects Xilinhot in Inner Mongolia as a studyarea．Using 1980＇s Landsat—TM image， a vegetation map（scale 1 ：500 000）was compiled：byanalysing the NOAA—AVHRR data of 28 Dec．1992，combining the snow depth survey andmeteorologic station record，a map of snow cover distribution was drawn．Overlaying the twomaps，a grade map of the height of forage hidden by snow cover in the study area in winter in1992 was compiled． The influence of snow cover on animal husbandry was discussed，whichprovides the foundation for evaluation on the danger of snow disaster．It was found thatheavy snow cover，like 1992，could seriously damage forage by hiding it．