论文部分内容阅读
为研究土壤质地对土壤水流运动非均匀特征的影响,在砂土、壤土和粉质粘土中采用亮蓝(砂土)和碘离子(壤土和粉质粘土)作为示踪剂分别开展了2个、5个和4个不同入渗条件(土壤初始含水率和入渗水量)的染色示踪试验,通过计算活动流场模型(Active Region Model,ARM)分形特征参数(γ)来定量描述和比较不同入渗条件下土壤水流运动的非均匀特征。研究结果表明,(1)活动流场模型较好的捕捉到了土壤水流运动整体的非均匀信息;(2)当其它入渗条件(土壤初始含水率和入渗水量)相同时,土壤水在细质地土壤中运动的非均匀程度要高于其在粗质地土壤中运动的非均匀程度。
In order to study the effect of soil texture on the heterogeneity of soil water flow, two bright blue (sand) and iodine ions (loam and silty clay) were used as tracer in sand, loam and silty clay , 5 and 4 different infiltration conditions (soil initial water content and water infiltration), quantitatively described and compared by calculating the fractal characteristic parameter (γ) of Active Region Model (ARM) Inhomogeneous Characteristics of Soil Water Flow under Different Infiltration Conditions. The results show that (1) the active flow field model better captures the non-uniform information of the overall soil water flow movement; (2) when other infiltration conditions (initial soil water content and infiltration water) are the same, The degree of inhomogeneity of movement in texture soils is higher than the degree of inhomogeneity of movement in rough soils.