黔东南苗族侗族自治州土地利用时空变化与驱动因素

Temporal and Spatial Variation of Land Use Change and Driving Forces Analysis in Qiandongnan Prefecture

选择黔东南州作为研究对象,利用1993,1999和2009年3期遥感影像,研究了黔东南16年来土地利用格局的时空变化特征。结果表明:1993—1999年,研究区耕地、建筑用地面积明显增加,而林地面积、草地面积和水体面积均呈下降趋势;1999—2009年,研究区建设用地仍然呈增加趋势,耕地和水体面积略有增加,林地和草地面积略有减少。研究区各市、县土地利用格局的变化动态差异明显,耕地和林地是各市、县的主要土地利用类型,变化强度较大,并且在时间维度上的变化不稳定。1993—2009年土地利用程度的变化表明,土地利用正处于发展期,随着经济的增长和人口数量的增加,对建设用地的需求还将扩大,土地利用的广度和深度将不断增大。

Based on the remote sensing imagery data of 1993,1999 and 2009, spatial and temporal variation of land use change of Qiandongnan Prefecture were analyzed. The results show that farmland and building area increased significantly in the study area from 1993 to 1999, while forest area, grassland and water area had declining trend. There were still increasing trend of building area, a slight increase in water and farmland area, as well as a slight decrease in grassland and forest area from 1999 to 2009. The dynamic change of land use pattern in different counties had significant difference. The farmland and forest were the main land use types in the study area with great intensity of variations and instabilities at the time dimension. The changes of degree of land use from 1993 to 2009 show that the level of land use was in a developing period. With economic growth and population increases, demand for construction land will expand, and the breadth and depth of land use will continue to grow.