OALib Journal期刊
ISSN: 2333-9721
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干旱区绿洲土地利用与覆被变化过程
DOI: 10.11821/xb200301008, PP. 63-72
Keywords: 土地利用与土地覆被变化,趋势和状态模型,平衡状态,三工河流域绿洲
Abstract:
应用遥感和GIS技术及数理统计学方法,以新疆三工河流域冲洪积扇-冲积平原型绿洲为研究区,利用1978年、1987年和1998年的遥感数据,深入研究了70年代中后期以来干旱区绿洲LUCC的过程和趋势。结果表明(1)遥感和GIS在绿洲土地利用与覆被变化数据获取和空间分析方面是一种非常强大而有效的技术手段;(2)通过建立绿洲LUCC的幅度、速度、区域差异和变化趋势数学模型,可以较好的研究绿洲土地LUCC的过程和趋势,如变化的双向性、单向性、正向性和反向性,变化的涨势或落势等,在三工河流域绿洲应用取得良好效果;(3)自70年代中后期以来三工河流域绿洲LUCC趋缓,并存在显著的时空差异前期绿洲LUCC处于单向转换过程的非平衡状态,并呈现一定的地段分异,其中绿洲上部处于准平衡状态,而绿洲中部和下部处于非平衡状态。后期绿洲LUCC呈现双向转换为主的发展态势,使绿洲LUCC处于准平衡状态;绿洲上部和中部处于非平衡状态,绿洲下部处于平衡状态,均表现出不同的变化过程和趋势。
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