基于土地转移矩阵的疏勒河中游土地利用变化研究

为了分析疏勒河流域土地利用的变化情况,以疏勒河中游为研究区,利用1980,2000年和2013年多期遥感影像数据和地形图,运用人机交互目视解译以及空间分析方法和数理统计方法,获得疏勒河中游土地利用现状、土地利用类型转移矩阵,对疏勒河流域近34 a来土地利用结构的动态演化进行了系统分析。结果表明:(1)近34 a来,疏勒河中游内未利用土地分布最广,其次是草地和耕地,再次是林地、城乡、工矿、居民用地和水域,仅占研究区不到4%的面积;(2)近34 a来疏勒河中游地区耕地大面积增加,水域面积急剧减少;(3)疏勒河中游区各景观类型的变化强度和变化方向各有不同,生态功能呈退化的趋势;纯自然生态系统的景观格局的变化强度在近年来有所上升,人类活动的影响强度呈加强的趋势。

Study on land-use change in midstream of Shule River based on land use transfer matrix

To analyze the land-use change in the Shule River Basin, based on multiple satellite remote sensed data (1980, 2000 and 2013) and topographic map, this study picks the midstream of the Shule River as the study area and utilizes the human-computer interaction interpretation, spatial analysis method and mathematical statistics function to obtain the current land use status and land use transfer matrix of the basin, which contributes to the systematical analysis of land use structure dynamic change in the past 34 years. The results showed as follows: ① In the past 34 years, unused land has distributed most widely in the midstream of the Shule River, followed by grass land, arable land, forest land, building and water area accounting less than 4% of study area; ② The arable land in the midstream of the Shule River had increased significantly but sharply shrinkage of water area was found in the past 34 years; ③ The change intensity and direction of each landscape type in the basin was different, and there was a degradation trend in ecological function. The change intensity of landscape pattern under pure natural ecological system had an increasing trend in recent years, and the influence intensity of human activities showed a strengthening trend.