不同地形条件下的土地利用格局与变化分析——以湖南醴陵市为例

Analysis of Land Use Pattern and Changes under Different Terrain Conditions——A Case Study of Liling

利用遥感和地理信息系统技术,通过地貌分区、高程分带、坡度分级和叠加分析等过程,分析了湖南醴陵市不同地形条件下的土地利用空间格局及其时空变化特点。结果表明:中南丘陵区地形对土地利用格局及其变化具有明显的影响。具体表现为在海拔较低,地势平坦的河谷平原,土地利用方式以水田、城乡建设用地为主,土地利用变化以水田减少和城乡建设用地增加为主要特征;在海拔较高,坡度较陡的山地和丘岗坡地,土地利用方式以旱地和林地为主,土地利用变化主要表现为旱地的减少和林地的增加。

The spatial pattern and temporal and spatial variation of land use under different terrain conditions in Liling were analized by using technoloty of remote sensing and geographical information system （RS and GIS） to analyze landform-division, altitude-zone and slope-classification respectively and overlay analysis of them based on the database that investigated from remote sensing image, land-use map, topographic map, geomorphologic map, DEM data and other materials from field measurements. The results showed the patterns and changes of land-use were significantly affected by hill area landform in central-south of China. The dominant land-use types in low elevation and slope gently area was paddy field and construction land; the major characters of land use changes were expressed in decreasing paddy field and increasing construction land. In higher elevation and steeper hilly area, the dominant land use types were dry land and woodland; the major characters of land use changes were expressed in decreasing dry land and increasing woodland.