摘要
基于Landsat TM数据和GIS技术,通过土地利用变化和重心迁移理论对农牧交错区河北省沽源县30多年土地利用的空间演变情况进行分析。结果表明:研究区农业用地和草地占主要地类,1980—2013年土地利用重心有明显迁移;农业用地重心向东北迁移,迁移距离为4 595.79 m;林地重心向东南方迁移,迁移距离为3 820.62m;草地和建设用地重心向西北方迁移,迁移距离分别为5 294.75、1 220.91 m;水域重心迁移距离较小;未利用土地重心向西南方迁移,迁移距离为4 552.13 m。自然因素对沽源县土地利用空间变化起到一定的推动作用,政策推动等人类活动干扰则是主要驱动因素。
Based on Landsat TM data and GIS technology,through the information of land-use change and barycenter migration theory,the spatial evolution of land-use structure in the past 30 years in Guyuan County,Hebei Province has been analyzed. The results showed that agricultural land and grassland were the principal types of land-use,and the land-use barycenters experienced a significant migration in the study area from 1980 to 2013.The barycenter of agricultural land has migrated toward northeast with the distance of 4 595. 79 m; the barycenter of woodland has migrated toward southeast with the distance of 3 820. 62 m; the barycenters of grassland and construction land have migrated toward northwest with the distance of 5 294. 75 m and 1 220. 91 m,respectively; the barycenter of water body has migrated little; and the barycenter of unused land has migrated toward southwest with the distance of 4 552. 13 m. Policies and human activities are the main driving factors,while natural factors play a promoting role in the spatial variation of land-use.
出处
《干旱地区农业研究》
CSCD
北大核心
2014年第4期217-221,261,共6页
Agricultural Research in the Arid Areas
基金
国家自然科学基金资助项目(51209119)
浙江海洋学院科研启动经费资助
关键词
土地利用
空间变化
重心迁移
land use
spatial variation
barycenter migration
