关键词: 土地利用变化, 地形, 等级, 贵州省

Abstract: [Objective] The aim of the study was to explore the characteristics of land use change in different terrain gradients. [Method] In this study, a method combining remote sensing and GIS statistical analysis was used. The terrain gradient characteristics of land use change were analyzed according to elevation, slope, landform relief and terrain niche from 1990 to 2010. [Results] The distribution characteristic of land use from 1990 to 2010in Guizhou had a significant effect of terrain gradient. Farmland, construction land and waters were mainly distributed in the low terrain gradient of slope, landform relief and terrain niche. Conversely, woodland, grassland and unused land were distributed in high terrain gradient. Farmland, grassland and unused land were in high elevation. However, woodland, construction land and waters were in the low elevation. The area of farmland and unused land decreased in each terrain gradient from 1990 to 2010 while the area of woodland, grassland, construction land and waters increased. The most obvious is the conversion from farmland and unused land to woodland and construction land. The change of farmland, grassland, woodland and unused land concentrated in the average or lower terrain gradient. The change of construction land and waters were mainly distributed in the average elevation or other lower terrain gradient. [Conclusion] There were obvious differences in terrain gradients of land use change as a resust of natural condition, socio-economic factor and reforestation policy.

Key words: land use change, landform, grading, Guizhou province