基于遥感数据的根河市火烧迹地植被覆盖度时空分析  

Spatio-temporal Analysis of Vegetation Coverage Based on Remote Sensing Data in Burned Area of Genhe City

作　　者：包月梅[1] 孙紫英[1] 赵鹏武[1] 王梓璇[1] 周梅[1] 谷俊杰[2] 

机构地区：[1]内蒙古农业大学,呼和浩特010018 [2]内蒙古师范大学

出　　处：《东北林业大学学报》2015年第11期62-69,74,共9页Journal of Northeast Forestry University

基　　金：内蒙古科技计划项目(20130435;20120421;20110527)

摘　　要：以根河市火烧迹地2000、2003、2006、2010和2014年的影像数据为数据源,提取5个时相的植被覆盖度数据,采用NDVI像元二分线性模型估算法,分析2003年5月5日金河-根河地区森林火灾前后,火烧迹地植被覆盖度时空动态变化。结果表明：（1）2000—2014年火烧迹地年均植被覆盖度分别为0.542 2、0.332 7、0.505 3、0.488 1、0.472 4,火烧前的年均植被覆盖度大于火烧后的年均植被覆盖度,火烧后随着植被恢复年限的增加,中低度以上等级的植被覆盖度面积均有增加的趋势。（2）在空间上,除海拔600-800 m,火烧前的平均植被覆盖度小于火烧后平均植被覆盖度,其余不同海拔、坡度和坡向上,火烧前植被覆盖度均大于火烧后植被覆盖度,且随着植被恢复年限的增加,植被覆盖度有逐年增加的趋势。（3）火烧后的2003—2006年,较低海拔和较小坡度上植被恢复比较显著,且植被恢复速度大于2006—2014年;2006—2014年在较高海拔和较大坡度上植被恢复比较显著。We estimated the vegetation coverage of burned area in Genhe City based on images data in five periods of 2000,2003,2006,2010 and 2014 by dimidiate pixel linear model,and analyzed the change of vegetation coverage after the fire of Jinhe to Genhe on May 5,2003. The average vegetation coverages of burned area were 0.542 2,0.332 7,0.505 3,0.332 7 and0.505 3 in Genhe City,respectively. The early average vegetation coverage was more than the later. With the increasing time of vegetation restoration,the moderate levels of vegetation coverage area had a growth trend. From space,expect the elevation of 600-800 m,the average vegetation coverage was incremental after the fire,but for the elevation,slope and aspect,the situation is opposite. With the increasing time of vegetation restoration,the vegetation coverage was increased.Burned after 2003-2006,vegetation restoration speed had greater than that of 2006-2010 and 2010-2014. Vegetation restoration of lower elevation and smaller slope in burned area was significant. However,in 2006-2010 and 2010-2014 after burning,vegetation restoration of higher elevation and larger slope was significant.

关 键 词：火烧迹地 植被覆盖度 像元二分线性模型 

分 类 号：S718.3[农业科学—林学] S762