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
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
复制标题
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Zhou Shengbin
中科院分区：
文献类型：
--
作者：
Zhou Shengbin
玛纳斯河流域位于准噶尔盆地南部，北方天山北坡经济带的中心，是新疆绿洲开发和经济发展的典范，流域内生态环境脆弱，近年来由于自然环境的变化和人口的增长，流域内土地利用/土地覆被发生了全面的变化，本文以干旱区典型流域玛纳斯河流域为研究对象，利用1976年、1989年遥感影像，利用地理信息系统（GIS）和分形理论，研究了该流域近30年来土地利用/土地覆盖变化（LUCC）的分形复杂性和稳定性特征，结果表明，玛纳斯河流域土地利用/土地覆被类型分布具有分形特征，土地利用/土地覆被类型的复杂性和稳定性具有波动性，1976、1989、2005年的平均分维数分别为1.3940、1.3634和1.3899，1976年、1989年、2005年的平均稳定性指数分别为0.6060、0.6366、0.6101。1976年、1989年和2005年沙地未利用地居民地水域林地草地耕地盐碱地盐碱地耕地草地林地的稳定性较差，研究土地利用/土地覆被变化的分形复杂性和稳定性特征，将为林地土地利用/土地覆被变化的研究提供有价值的依据建立水土保持协调机制，调整土地利用结构。
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.