土壤的初始含水率及容重对其入渗特性的影响

Effects of initial moisture content and bulk density on soil infiltration characteristics

为了深入分析与了解不同有机质含量、不同容重的土壤对污染水体土壤入渗特性所造成的一系列影响,本文开展了土壤入渗试验,分析结论显示:对于质地相同、但有机质含量不同的土壤,容重对土壤入渗特性所造成的影响存在较大差异,高有机质含量土壤受到的影响最为严重;对于高有机质含量土壤而言,当容重明显增大时,土壤湿润深度、累积入渗量均出现明显降低,稳定入渗率以乘幂的形式降低;而低有机质含量土壤,虽然入渗率、累积入渗量等参数会随容重显著增加而有所减小,但其减小量十分微小,其稳定入渗率呈平缓线性降低。

In order to deeply analyze and understand the effects of soils with different organic matter content and different bulk density on soil infiltration characteristics of polluted water bodies,this paper carried out soil infiltration test.The analysis results show that for the same texture but different organic matter content Soil and bulk density have great influences on soil infiltration characteristics.Soils with high organic matter content are most seriously affected.For soils with high organic matter content,when soil bulk density increases significantly,soil wet depth and cumulative infiltration amount Both of them have a significant decrease,and the stable infiltration rate decreases in the form of power.However,in the soil with low organic matter content,although the infiltration rate and cumulative infiltration amount will decrease with the increase of the volume,the reduction is very large.Small,its stable infiltration rate is flat and linearly reduced.