云南南部地区耕地变化时空特征及成因分析

Study on Spatial and Temporal Characteristics and Driving forces of the Cultivated Land Change in the Southern Part of Yunnan Province

研究目的:揭示云南南部地区20世纪80、90年代土地利用/覆被变化规律,以及耕地格局变化的驱动机制。研究方法:应用ArcGIS将研究区域不同时期的土地类型图进行叠加,并将得到的土地覆被变化图进行空间相关分析;运用SPSS软件对耕地变化影响因子进行相关分析。研究结果:本区的土地利用/土地覆被格局变化以林—草及林草—耕地转换为主,耕地分布随海拔、坡度的不同有明显的变化规律,且耕地分布格局存在着较为显著的时空差异。研究结论:本区的土地利用/覆被格局及其演变受自然、社会、经济等各方面因素的影响,尤以政策和人口经济发展压力为主,这从一个侧面反映了加强本区土地管理的重要性。

The purpose of the paper is to reveal the rules of LUCC in southern Yunnan and the driving forces of spatial pattern change of cultivated land from 1980s to 1990s. ArcGIS was used to overlay the land use maps of the study area at different time periods and correlate spatially with relevant land cover change maps. SPSS software was applied to carry out correlation analysis of the influence factors of cultivated land change. The results indicate that the LUCC in the study area was dominated by the conversion between forestland and grassland, forestland-grassland and cultivated land. There were obvious spatial and temporal differences in the distribution pattern of cultivated land, which changed by elevation and slope. It is concluded the LUCC of southern Yunnan was influenced by natural, social and economic factors. The major factors were associated with policy, population and economic development, which reflected from one side the importance of strengthening the land administration of the area.