新疆土壤侵蚀格局及其空间结构分析
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摘要
基于星地多源数据,运用水土流失通用方程提取新疆地区水土流失空间分布信息,运用分形维数解析其空间复杂度。结果表明,新疆地区水土流失强度分布存在明显的空间分异,弱度(微度、轻度)水土流失分布于山前冲积扇向盆地边缘过度地带,强度(中度、强度、极强)水土流失分布于山麓河流汇源、居民点、绿洲耕地地区,其中以微度、轻度水土流失为主,占区域总面积的21.16%、13.88%,是区域水土流失治理的重点。维数特征显示,新疆地区水土流失景观具有良好分形结构(R2>0.7),不同水土流失强度的分形维数依次为:微度(1.755)>轻度(1.587)>中度(1.586)>强度(1.569)>极强度(1.551)。
The article is based on the Star multi-source data and makes use of the general equation of soil erosion to extract the spatial distribution information of soil and water loss in Xinjiang and use of fractal dimension to analyze the spatial complexity. The results show that there is a clear spatial distribution of soil and water loss intensity in Xinjiang, and the weak(mild and light) soil erosion is distributed in the transitional zone from the alluvial fan to the edge of the basin. The strength(moderate, strong, and extremely strong) is that of soil and water. Losses were distributed in the rivers, sinks, settlements and oasis cultivated areas of mountains and rivers, of which the slightest and lightest soil and water loss were the main areas,accounting for 21.16% and 13.88% of the total area, which was the focus of regional water and soil erosion control. The characteristics of dimensions show that the landscape of soil erosion in Xinjiang has a good fractal structure(R2>0.7), and the fractal dimension of different soil erosion intensity is: microscopic(1.755)> mild(1.587)> moderate(1.586)> intensity(1.569)>Extreme Strength(1.551).
The article is based on the Star multi-source data and makes use of the general equation of soil erosion to extract the spatial distribution information of soil and water loss in Xinjiang and use of fractal dimension to analyze the spatial complexity. The results show that there is a clear spatial distribution of soil and water loss intensity in Xinjiang, and the weak(mild and light) soil erosion is distributed in the transitional zone from the alluvial fan to the edge of the basin. The strength(moderate, strong, and extremely strong) is that of soil and water. Losses were distributed in the rivers, sinks, settlements and oasis cultivated areas of mountains and rivers, of which the slightest and lightest soil and water loss were the main areas,accounting for 21.16% and 13.88% of the total area, which was the focus of regional water and soil erosion control. The characteristics of dimensions show that the landscape of soil erosion in Xinjiang has a good fractal structure(R2>0.7), and the fractal dimension of different soil erosion intensity is: microscopic(1.755)> mild(1.587)> moderate(1.586)> intensity(1.569)>Extreme Strength(1.551).
引文
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