摘要
通过对1985年和1987年Thematic Mapper(TM)影像中提取出的归一化植被指数进行对比分析,提取了1986年长白山自然保护区内遭受台风袭击后的灾区范围,并通过比较1988年和2007年的TM影像,分析了风灾区的植被恢复过程。同时,结合该地区的地形、水文、土壤和公路数据对风灾区的植被恢复进行了驱动力分析。发现地形驱动因子与风灾区的恢复程度呈高度相关,随着高程、坡度和平地所占比例的减少,恢复程度逐渐变好;此外水文、土壤和人类活动都对风灾区的植被恢复产生一定影响,另外人工干预恢复对植被生长也起着积极的作用。研究结果可供风灾区内植被的进一步恢复和森林防火工作参考。
This paper is intended to identify the stricken area of typhoon in 1986 by comparing the normalized difference vegetation index（NDVI） variance extracted from the Thematic Mapper（TM） imageries in 1985 and 1987 in the Changbai Mountain Natural Reserve,and to analyze the process of vegetation restoration in the area in the next 20 years after the striking by comparing the vegetation changes extracted from the TM imageries in 1988 and 2007.The forces driving vegetation restoration was also examined in the paper by utilizing the terrain,hydrology,soil,and road data of the area.Field investigation indicated that the vegetation restored slowly in this area.It was found that terrain was a key factor driving vegetation restoration.High correlation was found between the recovery degree and terrain.The recovery degree increases with the reduction of elevation,slope and flat-land.Besides,vegetation recovery is also affected by hydrology,soil and human activities.In addition,the restoration could be accelerated under human interference.This study provided a reference to monitoring vegetation change in typhoon-stricken area.The methodology developed in the study could also be applicable to monitoring vegetation restoration in forest-fired regions.
出处
《自然灾害学报》
CSCD
北大核心
2011年第6期131-139,共9页
Journal of Natural Disasters
基金
国家自然科学基金资助项目(40661003)
延边大学与Kanazawa University国际合作项目
关键词
遥感
台风灾区
归一化植被指数
植被恢复
长白山自然保护区
remote sensing
typhoon-striken area
normalized difference vegetation index（NDVI）
vegetation restoration
Changbai Mountain Natural Reserve
