%0 Journal Article
%T The classification and assessment of freeze-thaw erosion in Tibet<br>西藏冻融侵蚀的分级和评价
%A ZHANG Jianguo
%A LIU Shuzhen
%A YANG Siquan
%A <br>张建国
%A 刘淑珍
%A 杨思全
%J 地理学报(英文版)
%D 2007
%I 
%X Freeze-thaw erosion is the third largest soil erosion type after water erosion and wind erosion. Restricted by many factors, few researches on freeze-thaw erosion have so far been done at home and abroad, especially those on the assessment method of freeze-thaw erosion. Based on the comprehensive analysis of impact factors of free-thaw erosion, this paper chooses six indexes, including the annual temperature range, annual precipitation, slope, aspect, vegetation and soil, to build the model for relative classification of freeze-thaw erosion using weighted and additive methods, and realizes the relative classification of the freeze-thaw erosion in Tibet with the support of GIS software. Then a synthetic assessment of freeze-thaw erosion in Tibet has been carried out according to the relative classification result. The result shows that the distribution of freeze-thaw eroded area is very extensive in Tibet, accounting for 55.3% of the total local land area; the spatial differentiation of freeze-thaw erosion with different intensities is obvious; and the difference in distribution among different regions is also obvious.
%K Tibet
%K freeze-thaw erosion
%K GIS
%K classification and assessment<br>西藏
%K 冻融侵蚀
%K 分类
%K 评价
%K GIS
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=E7E6A89DD0CE36AA3756C02EB6F15CA7&aid=B084274FE331F903637D1C5B6E967B75&yid=A732AF04DDA03BB3&vid=BCA2697F357F2001&iid=0B39A22176CE99FB&sid=31611641D4BB139F&eid=0584DB487B4581F4&journal_id=1009-637X&journal_name=地理学报(英文版)&referenced_num=0&reference_num=8