摘要
应用计算机图像分析技术,对6个典型土样测定土壤颗粒的等效直径和分布规律,给出用粒径的数量分布表征的土壤分形维数。结果表明:土壤颗粒的粒径分布具有一定的统计分形特征,分维数的数值反映了粒径大小和分布的均匀程度。分维数愈大,土壤颗粒的粒径愈小,细粒含量愈高,质地愈不均匀;土壤颗粒在单一粒级分布的集中程度对分维数的数值有重要影响,单一粒级的颗粒含量愈高,分维数愈大。计算机图像分析技术为土壤的分形研究提供了一种精确、简便的实验和分析方法。
The technology of image analysis is applied to measure the equivalent diameter and grain size distribution of six soil samples. The fractal dimension characterized by grain size distribution is obtained accordingly. The analysis shows that the grain size distribution of soils exhibits a statistical fractal feature and the magnitude of fractal dimension reflects the sizes and uniformity of soil particles. Large fractal dimension corresponds to small size grain, high percentage of fine particles and poor uniformity. The uneven distribution of particle sizes will remarkably influence the magnitude of fractal dimension. The fractal dimension will be very large if the sizes of soil particles are concentrated in a narrow range.
出处
《水利学报》
EI
CSCD
北大核心
2004年第4期67-71,79,共6页
Journal of Hydraulic Engineering
基金
教育部高等学校骨干教师资助计划项目
湖北省自然科学基金项目(2000J141)资助
关键词
土壤
粒径分布
分形
分维数
图像分析
soil
diameter distribution
fractal
dimension
image analysis
