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Position: Home > Articles > Analysis on Dynamic Monitoring of Desertification and Its Influencing Factors in Ruoergai County Sichuan Forestry Exploration and Design 2007 (4) 60-65

若尔盖县土地沙化动态监测与影响因素分析

作  者:
王洪军;李洪梅;古晓东
单  位:
若尔盖县林业局
关键词:
土地沙化;动态监测;影响因素;若尔盖县
摘  要:
利用2004年的ETM遥感影像数据提取研究区的土地沙化情况,在此基础上,与1999年的土地沙化资料进行对比,分析土地沙化动态变化情况。结果表明,2004年研究区沙化土地面积10169.9hm2(不含沙化趋势地,下同),占沙区乡(场)土地面积的1.56%,占若尔盖县土地总面积的0.97%。与1999年沙化监测相比,若尔盖县沙化土地面积增加4307.1hm2,递增率73.46%,平均每年以11.65%速度递增。其中流动沙地、半固定沙地、固定沙地及沙趋地的增长率分别达到61.20%、72.97%、92.00%和163.40%。
译  名:
Analysis on Dynamic Monitoring of Desertification and Its Influencing Factors in Ruoergai County
作  者:
WANG Hong-jun,LI Hong-mei,GU Xiao-dong(Forestry Bureau of Ruoergai County,Ruoergai 624500,China)
关键词:
Desertification,Dynamic monitoring,Influencing factors,Ruoergai County
摘  要:
Based on the ETM remote sensing image data shot in 2004,the authors obtained the desertification information research area.Then authors made a contrast analysis between these information and desertification material in 1999 to study the dynamic change of desertification.The result indicated that the desertification area of research area was 10169.9hm2 in 2004(not containing area tending to desertification,similarly hereinafter),occupied 1.56% of the land area of township(field) in desert region,and occupied 0.97% of the total area of Ruoergai County.Compared with the desertification situation of 1999,desertification area of Ruoergai County increased 4307.1hm2;increasing progressively proportion was 73.46%,and the average annual increasing progressively proportion was 11.65%.The increasing rate of mobile sandy land,half fixed sandy land,fixed sandy land and land hasten to desertification respectively achieved 61.20%,72.97%,92.00% and(163.40%).

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