CT在土壤大孔隙研究中的应用评述

A Summary of CT Application in Research of Soil Macropores

对各种存在条件下的非扰动土柱和由一定大小的土壤颗粒均匀填充的土柱进行 CT扫描实验 ,阐明CT扫描原理和过程 ,从传统统计法和分形几何法两个方面论述人们如何利用实验得到的断层扫描图像和二维矩阵 CTN图来确定大孔隙的大小、数目、类型、分布连通性。结果表明 CT扫描是一种有发展前景的。

Soil Macropores have great influence on water and solute movement in soil. Several undisturbed soil columns with various situations disturbed soil columns filled uniformly with special size of soil aggregates are scanned with CT. It is discussed systematically that how caught images and plots of CTN value in two dimension matrix taken from CT scanning process are used to characterize the size, number, type, distribution and continuity of macropores in the soils with traditional statistical method and fractal geometry method. Results indicate that CT scanning is a promising, non destructive method for characterizing macropores in soil.