浑水入渗的基本特性研究

依据大田土壤清、浑水积水入渗对比试验资料,揭示了浑水入渗的一些基本特性。对试验结果进行分析后表明:在相同入渗条件下,浑水入渗主要受泥沙含量的影响,由于入渗浑水中的泥沙入渗时在地表形成一个沉积层,因而对入渗起到阻碍作用,使得浑水累积入渗量和稳定入渗率都随浑水泥沙含量增大而减小;浑水入渗也符合Kostiakov-Lewis入渗模型,入渗指数随浑水泥沙含量的增大而增大,入渗系数和相对稳定入渗率随浑水泥沙含量的增大而减小。研究结果对于指导浑水灌溉可提供参考。

The Study of Basic Characteristics Under Muddy Water Infiltration

Based on the water infiltration experiments in the field soil, this article brings forward the differences and analyses some basic chacters of muddy water infiltration. At the same situation of infiltration, muddy water infiltration is mainly influenced by sediment content, because sediment content forms a sedimentary deposit on the groud surface , which blocks muddy water infiltration, therefore, muddy water cumulative infiltration and stable infiltration rate decreases with increasing of sediment content in the muddy water. Muddy water infiltration agrees with Kostiakov-Lewis model, infiltration index a increase with increasing of sediment content in the muddy water, infiltration factor k and stable relatively infiltration rate f0 decrease with increasing of sediment content in the muddy water. These results have important meanings for research and applying muddy water irrigation.