近20年辉南县土地利用时空变化特征研究  

Spatial-Temporal Characteristics of Land Use Change in Huinan County During the Last Twenty Years

作　　者：翟羽娟[1] 张艳红[1] 周岩[2] 

机构地区：[1]吉林大学地球探测科学与技术学院,吉林长春130026 [2]辉南县国土资源局,吉林通化135100

出　　处：《测绘与空间地理信息》2012年第12期53-57,共5页Geomatics & Spatial Information Technology

基　　金：吉林大学青年教师基金项目(450060445196);国家自然科学基金项目(40801067)资助

摘　　要：基于GIS空间与统计分析模型,从时间和空间格局变化两方面对辉南县1986年和2006年两期土地利用数据进行定量分析。结果表明:1)近20年内研究区的主要用地类型:耕地、建设用地和水域面积增加;林地面积大幅减少,且多转变为耕地。用地类型面积的增加虽有助于促进该区经济发展,但林地资源的大量减少会对该区生态环境产生一定影响。2)土地利用类型整体均向东南方向偏移,体现出林地向东南山区收缩而耕地向山区扩张的特点,格局变化较明显,且主要发生在海拔较低、坡度较缓地带。但研究区内转换为坡度大于15°的耕地也占有一定比例,应采取退耕还林政策,以防止由于坡耕地而产生的水土流失、土壤侵蚀等现象。Based on the data from 1986 and 2006 land use information and with the help of GIS software,the temporal and spatial characteristics of land use changes were analyzed in Huinan County.The results showed that: 1) During the past 20 years,the forest land markedly decreased with a rate of 0.45%,and most of the decreased forest was converted into cultivated land,while the area of cultivated land,construction land and water increased during the same period with rate of 0.36%,5.04% and 5.72% respectively.The results indicated that the increase of cultivated land and construction land were beneficial to the economic development.However,the decrease of forest land would be damage to the ecological environment.2) The study on centroid transfer showed that only the centroid of construction land moved to the Northeast,and the others moved to the Southeast.The regional structure of land use changed greatly,mainly occurring on the elevation of 300m-400m and slope of 0-6.Therefore some measures should be taken to prohibit human from converting forest land into cultivated land,especially for those forest land located over the slope of 15°,which was helpful to prevent the water losses and soil erosion.

关 键 词：土地利用 时空变化 GIS 辉南县 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]