| 干旱区典型流域近30年土地利用/土地覆被变化的分形特征分析——以玛纳斯河流域为例 |
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| 引用本文： | 李义玲,乔木,杨小林,周生斌.干旱区典型流域近30年土地利用/土地覆被变化的分形特征分析——以玛纳斯河流域为例[J].干旱区地理,2008,31(1):75-81. |
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| 作者姓名： | 李义玲 乔木 杨小林 周生斌 |
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| 作者单位： | 1. 中国科学院新疆生态与地理研究所,新疆,乌鲁木齐,830011;中国科学院研究生院,北京,100049
2. 中国科学院新疆生态与地理研究所,新疆,乌鲁木齐,830011 |
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| 基金项目： | 自治区科技攻关项目
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自治区计委新疆灌区盐碱地现状调查项目 |
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| 摘 要： | 利用1976、1989、2005年三期遥感影像,运用GIS和分形理论研究干旱区典型流域——玛纳斯河流域近30年的土地利用/土地覆被变化的复杂性和稳定性。结果表明:玛纳斯河流域各时段的土地利用/土地覆被类型分布具有分形结构,土地利用/土地覆被类型形状复杂性和斑块的稳定性波动变化,1976、1989、2005年三时期的各种土地利用/土地覆被类型总平均分维值分别为1.394 0、1.363 4和1.389 9。总平均稳定性指数分别为0.606 0、0.636 6、0.610 1。三期土地利用/覆被类型平均稳定性排序为:沙地>未利用土地>居民点工矿用地>水域>林地>草地>耕地>盐碱地。耕地、林地、草地、盐碱地稳定性相对较差。通过对流域土地利用/土地覆被类型变化复杂性和稳定性的研究,可以为政府协调水土开发和调整土地利用结构提供支持。
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| 关 键 词： | 干旱区玛纳斯河流域 土地利用/土地覆被变化 分形理论 分维数 地理信息系统 |
| 文章编号： | 1000-6060(2008)01-0075-07 |
| 收稿时间： | 2007-02-04 |
| 修稿时间： | 2007-06-12 |
Fractal characteristics of land use and land cover change in a watershed of arid zone in last 30 years:A case of the Manas River Watershed |
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| LI Yi-ling,QAO Mu,YANG Xiao-lin,ZHOU Sheng-bin.Fractal characteristics of land use and land cover change in a watershed of arid zone in last 30 years:A case of the Manas River Watershed[J].Arid Land Geography,2008,31(1):75-81. |
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| Authors: | LI Yi-ling QAO Mu YANG Xiao-lin ZHOU Sheng-bin |
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| Abstract: | The Manasi River watershed is located at the south of the Junggar Basin and at the center of Northern Tianshan Slope Economic Belt.It is the model of oasis exploitation and economy development in Xinjiang.The ecological environment has fragility in the watershed.In recent years,because of natural environment variation and population growth,the overall change of land use and land cover has taken place in the watershed,affected the oasis stability.This paper studied fractal complexity and stability characteristic of land use and land cover change(LUCC) in the typical watershed of arid zone-the Manas River watershed in last 30 years since 1976,using geographic information systems(GIS) and fractal theory with remote images in 1976,1989,and 2005.The results showed that the distribution of land use and land cover type in the Manas River watershed has the fractal property.The complexity and stability characteristics of land use and land cover type are fluctuant.The average fractal dimensions are 1.3940,1.3634,and 1.3899 in 1976,1989,2005,respectively.The average stability indices are 0.6060,0.6366,and 0.6101 in 1976,1989,2005,respectively.The average stability indices of different land use and land cover types arranged in number order from big to small are as follows: sand land > unused land > residence land > water area > forestland > grassland > cropland > saline-alkali land in 1976,1989 and 2005.Saline-alkali land,cropland,grassland,forestland have poorer stability.The research of fractal complexity and stability characteristic of land use and land cover change would be a valuable basis for establishing harmonious mechanism of water and soil and adjusting land use structure. |
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| Keywords: | arid zone Manasi river watershed LUCC(land use/land cover change) fractal theory fractal dimension GIS |
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