CAJ | 학술논문

实施退耕还林是中国的一项重大生态工程。退耕还林不仅要考虑耕地的坡度因子，也要考虑时间顺序问题。研究利用SPOT－5遥感影像获取耕地信息，基于数字高程模型（ DEM，Digital Elevation Model）获取坡度。利用GIS的空间分析功能，得到不同坡度范围内的耕地分布。经统计，35°以上耕地6．05 hm2是首先需要退耕还林的区域；25°～35°范围的坡耕地为220．45 hm2是必须退耕还林的区域；15°～25°范围的坡耕地2373．15 hm2，是退耕还林的备选区。本研究为小流域的退耕还林时空决策分析提供了参考和借鉴。
실시퇴경환림시중국적일항중대생태공정。퇴경환림불부요고필경지적파도인자，야요고필시간순서문제。연구이용SPOT－5요감영상획취경지신식，기우수자고정모형（ DEM，Digital Elevation Model）획취파도。이용GIS적공간분석공능，득도불동파도범위내적경지분포。경통계，35°이상경지6．05 hm2시수선수요퇴경환림적구역；25°～35°범위적파경지위220．45 hm2시필수퇴경환림적구역；15°～25°범위적파경지2373．15 hm2，시퇴경환림적비선구。본연구위소류역적퇴경환림시공결책분석제공료삼고화차감。
The implementation of returning farmland to forest is an important ecological engineering in China.It should not only con-sider the slope factor of cultivated land, but also want to consider the time sequence problem.In this article, farmland information was obtained according to SPOT-5 image.Slope was obtained based on DEM ( Digital Elevation Model) .Using GIS ( Geographic Infor-mation System) spatial analysis, get farmlands within different slope.There are 6.05 hm2 farmlands above 35°, which are the first need of the region returning farmland to forest.Farmlands within 25°~35°are prerequisite returning farmland to forest regions, and its area is 220.45 hm2 .Farmlands within 15°~25°are alternative returning farmland to forest regions, and its area is 2 373.15 hm2 . This research can provide reference for time-spatial decision-making analysis of returning farmland to forest in the small watershed.