摘要
土地利用变化是导致生态敏感性的重要因素之一,结合生态环境和土地利用相互关系的基本框架,运用土地利用动态度模型和地理信息系统空间分析功能,建立土地利用变化下的生态敏感性指标体系和分级标准,分析建设用地、林地、草地、耕地、水域、未利用地等土地利用类型的面积比例和变化过程,对近20年来喀什市单一土地利用动态度变化和生态敏感性程度进行了定量研究。结果表明,1990—2010年间喀什市土地利用类型的变化较快的地类分别是草地、耕地、林地、建设用地和未利用地。其中,林地和建设用地每年以1.58%和1.87%的速度在增加。草地、耕地、水域和未利用地每年以2.42%、1.36%、1.81%和1.04%的速度在减小。城市高敏感区和不敏感区面积由1990年的22.79 km^2、113.76 km^2增加到2010年的58.40 km^2和125.95 km^2,呈逐年增加的趋势。反而中敏感区和低敏感区面积由1990年的30.21 km^2、121.76 km^2减小到2010年的15.54 km^2、88.63 km^2,呈现逐年减小的变化特征。
Land use change is one of the important factors leading to ecological sensitivity. This paper quantitatively researches the degree and extent of the ecological sensitivity and analyzes the single land use dynamic changes of Kashgar City focusing on the area ratio and change process of built-up land, forest land, grassland, cropland, water area, bare land types in the past 20 years, by combining with the basic framework of the relationship between land use and the environment, using of the land use dynamics model and GIS spatial analysis, and establishing eco-system sensitive indicators and grading standards of land use changes. The results showed that between 1990 and 2010, rapid changes in land use type classes were grass land, cropland, water area, built-up land and bare land. Among them, the forest land and built-up land increased by 1.58% and 1.87% each year. Grassland, cropland, water area and bare land decreased by 2.42%, 1.36%, 1.81% and 1.04% each year. Highly sensitive areas and non-sensitive area in 1990 to 2010 increased from 22.79 km^2 and 113.76 km^2 to 58.40 km^2 and 125.95 km^2, respectively, showing a rising trend. But sensitive area and low sensitivity area reduced from 30.21 km^2 to 121.76 km^2 in 1990 to 15.54 km^2 and 88.63 km^2 in 2010, showing a reducing trend.
出处
《生态科学》
CSCD
2016年第2期19-25,共7页
Ecological Science
基金
国家自然科学基金项目(41361043)
新疆维吾尔自治区青年科技创新人才培养工程优秀青年科技人才项目(2013721031)
