西藏土地沙漠化形成机制的生态足迹分析

 选择西藏土地沙漠化发生发展的典型地区，包括阿里地区的噶尔县和革吉县，那曲地区的那曲县和安多县，日喀则地区的日喀则市、南木林县、拉孜县和谢通门县，在土地沙漠化现状分析和生态足迹计算的基础上，通过土地沙漠化发展与区域生态足迹的比较分析，从生态足迹角度探讨了西藏土地沙漠化形成的基本原因。分析结果表明，西藏土地沙漠化的形成与发展是自然与人为因素综合作用的产物，其中主要是自然因素驱动的结果，自然因素是西藏土地沙漠化过程的基础与主导。

Ecological Footprint Analysis on Causes of Sandy Desertification in Tibet

A'gli Prefecture and Nagqu Prefecture as well as in Xigaze Prefecture are the main distribution areas of sandy desertified lands in Tibet,where Gar County,Ge'gyai County,Nagqu County,Amdo County,Xigaze County,Namling County,Lhaze County and Xaitonfmoin County are the typical regions of origination and development of sandy desertification,which are chosen as research regions to study the cause of sandy desertification by use of ecological footprint analysis method.The basic method is,on the basis analysis of the sandy desertification status and ecological footprint calculating of the chosen typical regions of sandy desertification,to compare the status and development of sandy desertification with ecological footprint and try to get the relationship between the origination and development of sandy desertification with ecological footprint,so the cause of origination and development of sandy desertification in Tibet could be found.It is found that the origination and development of sandy desertification in Tibet are the results of comprehensive functions of natural and human factors,in which the natural factors plays a leading role,natural factors are the basic and main factors controlling the sandy desertification in Tibet.