摘要
Food dye Brilliant Blue was introduced as the tracer in a dye-tracing experiment to obtain dye profile patterns of sandy loam soil, aeolian sandy soil, percolating paddy soil and permeable paddy soil. The dyed soil profiles were then photographed and the photos were scanned into a computer. Edited with certain software, only the dyed areas were left on the profile photos, which indicted the preferential flow paths for water and solute transport. Fractal dimensions of the dye patterns were calculated according to Arnold's function. Soil particle size distribution was analyzed by pipette method. The regression analysis showed that there was significant relationship between soil clay content and fractal dimension D of the dye pattern of soil profile. Based on the experiment results, the possibility of introducing fractal dimension to estimation of soil sensitivity to preferential flow is discussed.
Food dye Brilliant Blue was introduced as the tracer in a dye-tracingexperiment to obtain dye profile patterns of sandy loam soil, aeolian sandy soil, percolating paddysoil and permeable paddy soil. The dyed soil profiles were then photographed and the photos werescanned into a computer. Edited with certain software, only the dyed areas were left on the profilephotos, which indicted the preferential flow paths for water and solute transport. Fractaldimensions of the dye patterns were calculated according to Arnold's function. Soil particle sizedistribution was analyzed by pipette method. The regression analysis showed that there wassignificant relationship between soil clay content and fractal dimension D of the dye pattern ofsoil profile. Based on the experiment results, the possibility of introducing fractal dimension toestimation of soil sensitivity to preferential flow is discussed.
基金
Project supported by the National Key Basic Research Support FOundation(NKBRSF) of China(No.G19990ll708) and the Guangxi Uni,rsitv Science funds
China(No.1701).
