%0 Journal Article
%T Decision-marking on Returning the Dry Upland to Forest or Grass Land with Support of GIS and Remote Sensing in China<br>遥感和GIS支持下的中国退耕还林还草决策分析
%A YANG Cun-jian
%A LIU Ji-yuan
%A Zhang Zeng-xiang
%A ZHAO Xiao-li
%A <br>杨存建
%A 刘纪远
%A 张增祥
%A 赵晓丽
%J 遥感学报
%D 2002
%I 
%X Natural disaster such as the large flood took palce in 1998 in China and the dust storm in 2000 around Beijing makes our government paying more attention to improve the ecological environment in China. In order to improve the ecological environment, a great deal of the dry land must be returned back to forest or grass land. Where the dry land must be changed inlo the forestland or grassland is a very important question.In our study GIS is used to find the place where the dry land must be changed into forestland or grassland. In includes four steps. Firstly, the database is extablished including land use database, soil erosion database,DEM, slope database, aspect database, normalization vegetation index (NDVI) database, precipitation database and temperature database. The ecological environment quality database is oltained thtough evaluating the ecological environment quality. Secondly, the dry land from Landuse database was overlain with slope database, soil erosion database, normalization vegetation index(NDVI) database and the ecological environment quality database. The distribution of the dry land of different slope was analyzed. The distribution of the dry land of different slope under different soil erosion, different NDVI and different ecological environment quality was also analyzed. Thirdly, the expert knowledge about the dry land was collected, and a model of finding suitable places for changing into forestland or grassland is formulated on the basis of the knowledge. Finally, the suitable places are overlain with the precipitation layer to decide where trees need to be planted or where grass need to be planted. It shows that the results provide an important scientific decision base for government to construct the ecological environment in China.
%K geographic information system
%K dry land
%K Forest land
%K grass land<br>遥感
%K GIS
%K 中国
%K 退耕还林
%K 地理信息系统
%K 旱地
%K 林地
%K 草地
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=A41A70F4AB56AB1B&jid=F926358B31AC94511E4382C083F7683C&aid=5428F1B42848D16F&yid=C3ACC247184A22C1&vid=B31275AF3241DB2D&iid=38B194292C032A66&sid=EF27C460877D3C9F&eid=CC0ECB9C52F1B85F&journal_id=1007-4619&journal_name=遥感学报&referenced_num=26&reference_num=10