摘要
基于遥感和GIS技术,利用喀什地区1990、2000、2008年3个时期土地利用数据,结合统计年鉴,对研究区景观格局动态变化及驱动力进行了定量分析。得出：1990~2008年喀什地区单一景观类型格局发生了显著变化,耕地和城乡工矿用地面积持续增加,草地和未利用土地面积减少,分离度和破碎度因人为和自然干扰各景观类型的变化有所差异;人工景观稳定性和复杂性增强,自然景观结构简单,稳定性较差;景观动态呈＂显著变化—缓慢变化＂的趋势;20 a来,整个景观破碎度增加,景观形状趋于复杂和不规则化,景观异质性和均衡度增强;土地利用程度较低,但呈上升趋势,土地利用信息熵先增后减,区域景观经历了＂有序-无序-有序＂的变化。驱动力分析表明：对于能带来较高收益的半自然景观和人工景观受人为干扰的影响较大,对于自然景观,自然干扰是其变化的主要因素。
Based on the statistical data and three TM images in 1990,2000 and 2008,and using the technology of GIS and RS,the land use change and its driving forces in Kashi in the past 20 years were analyzed.The results showed that：in the past 20 years,the single landscape types changed obviously.Along with the farmland and residentia1land increasing,the grassland and unused land decreased.The fragmentation and separation varied,owing to the natural and human disturbing.The artificial landscape tended to be stable and complicated,however the structure of natural landscape was simple and fragile.The dynamic degree of land use underwent an ＂obvious change-slow change＂ trend.The whole landscape fragmentation increased,and the shape became more complicated and irregular,and heterogeneity and relevancy are enhanced.During the study period,the land use degree was still very low,but increased sustainably.The informing entropy underwent a process of ＂order-disorder-order＂ change.The driving forces denote： the landscape types that can bring high revenue are disturbed more easily by human beings,while the natural landscapes are disturbed more by natural condition.
出处
《干旱地区农业研究》
CSCD
北大核心
2011年第1期210-218,共9页
Agricultural Research in the Arid Areas
关键词
景观格局
时空演变
驱动力
喀什地区
landscape pattern
temporal change
driving force
Kashi
