OALib Journal期刊
ISSN: 2333-9721
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塔里木河干流区土地覆被变化与景观格局分析
DOI: 10.11821/xb200901010, PP. 95-106
Keywords: 土地覆被,景观格局,塔里木河
Abstract:
在GIS和遥感技术支持下,结合景观格局数量分析方法,利用1973年MSS、1983年航空遥感土地利用图、1990年TM、2000年TM和2005年CBERS遥感影像对新疆塔里木河干流区土地利用/覆被变化过程进行了定量分析。结果表明,1973-2005年塔里木河干流区土地利用/覆被发生了显著变化,耕地和城乡居民及建设用地面积显著增加,林地、草地和湿地面积减少,未利用地表现出先增加后减小的趋势。研究区土地利用类型转移的主要方向是林地和草地转化为耕地、耕地转化为城乡居民及建设用地、草地转化为未利用地。土地利用变化经历了“显著变化—缓慢变化—显著变化—急剧变化”的过程。景观格局分析表明,在人类活动的影响下,研究区景观破碎度、多样性增大,优势度减小。草地和未利用地对整个景观的控制作用减小,景观结构趋于多样和均匀。驱动力分析表明,人口增长和经济发展因素是塔里木河干流区土地利用/覆被变化的最直接驱动力,同时还受产业结构因素和政策因素及人类干扰强度的影响。
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