%0 Journal Article
%T Macro-Scale Survey and Dynamic Study of Sandy Land in Shaanxi, Gansu, Qinghai Provinces and Ningxia Region in 1966 and 2000 by Remote Sensing<br>1996—2000年陕甘宁青沙地遥感宏观动态研究
%A YAN Chang-zhen
%A WANG Yi-mou
%A FENG Yu-sun
%A WANG Jian-hua
%A <br>颜长珍
%A 王一谋
%A 冯毓荪
%A 王建华
%J 遥感学报
%D 2002
%I 
%X By using digital method of remote sensing and geographical information system techniques, TM images of 1996 and 2000 have been interpreted to establish the database of sandy land of two periods in Shaaxi, Gansu, Ningxia and Qinghai Provinces. Through the study practice and analyzing of sandy land databases,the following points can be concluded:In the study area there is as much as 7,910,807hm 2 sandy land in 2000 and more 6,424hm 2 than in 1996. The percentage of sandy land area over the whole area change from 5 733% in 1996 to 5 737% in 2000, and increases 0 004% in 4 years. In different regions, the change of sandy land is various, such as, it increased 0 004% in Shaanxi Province, decreased 0 017% in Gansu Province, decreased 0 479% in Ningxia Region and increased 0 051% in Qinghai Province. And then based on the change types of sandy land, the factors affecting sandy land changes were analyzed according to the situation of different regions.
%K RS technique
%K GIS technique
%K sandy land in Shaanxi
%K Gansu
%K Qinghai province and Ningxia region
%K macro
%K scale study by remote sensing<br>遥感
%K 地理信息系统
%K 陕甘宁青沙地
%K 遥感宏观研究
%K 环境监测
%K 生态环境
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=A41A70F4AB56AB1B&jid=F926358B31AC94511E4382C083F7683C&aid=4559868A7B43E808&yid=C3ACC247184A22C1&vid=B31275AF3241DB2D&iid=94C357A881DFC066&sid=09D368C679EC819B&eid=B9B90065CF5CD7F0&journal_id=1007-4619&journal_name=遥感学报&referenced_num=4&reference_num=7