1998-2005年石羊河流域土地利用/覆盖变化及其分析
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甘肃省荒漠化防治重点实验室建设项目(2GS047-A225-018);甘肃省沙漠综合治理技术研究创新团队项目


Analysis of Land Use/Cover Chang in Shiyang River Basin During the Period of 1998-2005
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    摘要:

    根据1998年和2005年两期影像数据,利用RS和GIS技术,分析了近7a来石羊河流域土地利用/土地覆盖的数量、结构、类型和空间分布上的变化情况,并对土地利用/土地覆盖变化的驱动力作了探讨。研究结果表明,7a间石羊河流域草地、戈壁、沙地、林地、旱地和盐碱地面积呈减少趋势;高山、居民点、水浇地呈增加趋势;水浇地增加幅度最大,增幅为89485.22hm2,主要是由林地、盐碱地、居民点、沙地和戈壁转变而来;人工林地、重轻度盐碱地和水浇地的土地利用动态度明显,依次为4.14%,3.48%,2.23%和2.56%;人口压力、经济因素、生态政策是影响该流域土地利用/土地覆盖变化的主要驱动力。

    Abstract:

    Based on the images in 1998 and 2005,the variations of quantity,inner structure,type,and spatial distribution feature of Shiyang River basin in seven years were analyzed by using RS and GIS and the driving forces of the land use/cover change(LUCC) were further discussed.Results indicated that during the seven years,the areas of grassland,Gobi,sandy land,woodland,dryland,and saline-alkaline land in Shiyang River basin were decreased and alpine,residential area and irrigable land were increased.The most significant increase is the irrigable land and its increased area is 89485.22hm2,which was mainly converted from woodland,saline-alkaline land,residential area,sandy land,and Gobi.The land use dynamic degrees of artificial woodland,saline-alkaline land,and irrigable land were 4.14%,3.48%,2.23% and 2.56%,respectively.The driving forces of the LUCC in Shiyang River basin were the economic development,the pressure of increasing population,and ecological policies.

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周兰萍,魏怀东,丁峰,陈芳,胡小柯.1998-2005年石羊河流域土地利用/覆盖变化及其分析[J].水土保持通报,2009,(1):169-173

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  • 收稿日期:2007-10-11
  • 最后修改日期:2008-03-27
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  • 在线发布日期: 2014-11-26
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