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Position: Home > Articles > Using Dye Tracer to Characterize Preferential Flow Movement on Soil Surface Water Saving Irrigation 2010 (5) 35-36+39

非饱和土壤优先流运动特性的染色示踪研究

作  者:
张丽华;王成武
单  位:
昆明理工大学现代农业工程学院
关键词:
染色示踪试验;染色面积;图像分析;土壤表平面;分维数
摘  要:
由于日益增长的环境问题,作为节水灌溉的基础——土壤中优先流的运动特性越来越受到关注。利用亮蓝对初始含水量不同的2组土壤中的非均匀流动进行了示踪研究。通过染色示踪试验采集土壤表平面的溶质迁移动态图像,结合图像分析讨论2种不同初始含水量土壤表平面溶质运移的变异过程。结果表明:2种初始含水量土壤中土样表面的溶质运移分布都不均匀;不同初始含水量土壤中土样表面溶质运移的动态过程不同;随着入渗时间与入渗水量的增大,2种初始含水量土壤中土样表面的分维数呈现非线性增长,染色剂的分布面积非线性扩大,但扩大程度非线性减小。
译  名:
Using Dye Tracer to Characterize Preferential Flow Movement on Soil Surface
作  者:
ZHANG Li-hua,WANG Cheng-wu (Faculty of Modern Agricultural Engineering,Kunming University of Science and Technology,Kunming 650224,China)
关键词:
dye experiment;dye coverage area;image analysis;soil surface;fractal dimension
摘  要:
Because of the growing environmental problem,as an important basis for water-saving irrigation,the characteristic of preferential flow in soil was coming to the object of studying for scholars.In this paper,Brilliant Blue was used to visualize the heterogeneous transportation on soil surface with different initial moisture content.Dynamically distributed images of solute moving on soil surface were obtained by dying tests,and with image analysis we analyzed the different solute transportation variation processes in soil with different moisture content.The result suggest that solute transportation in soil of different moisture is heterogeneous,and these variation processes were distinct,with time and water infiltration,these variation processes were all presented the nonlinear growth in these experiments,and the expansion degree was decrease in nonlinear.

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