论文部分内容阅读
以川中丘陵区微地形95个土壤样品的机械组成,运用分形模型计算出土壤颗粒分形维数,探讨了分形维数与土壤粒度组成的关系,并分析土壤颗粒分形维数在小尺度上的空间异质性。研究表明:土壤颗粒分形维数能够很好的表征土壤质地,重点反映小于0.05mm的细颗粒物质,尤其是粘粒,其次是粉粒;空间分析表明土壤分形维数在微地形上受地形影响,高值区多出现在丘顶及丘腰中上部,低值区出现在丘脚及冲沟处,土壤颗粒分形维数能够反映出丘陵区水土流失的强度。
Based on the mechanical composition of 95 soil samples in microtopography in central Sichuan hilly region, the fractal dimension of soil particles was calculated using fractal model. The relationship between fractal dimension and soil particle size composition was discussed. The fractal dimension of soil particles was analyzed on a small scale Heterogeneity. The results show that the fractal dimension of soil particles can well characterize the soil texture, especially the fine particles less than 0.05mm, especially the clay particles, followed by the powder particles. The spatial analysis shows that the fractal dimension of soil is affected by the topography on the micro-topography , The high value area appeared in the top of the hill and the middle of the hill, the low value area appeared in the mound and the gully, and the fractal dimension of soil particle could reflect the intensity of soil and water loss in the hilly area.