Establishment of Soil Preferential Flow Model Based on Modern Observation Technology
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Preferential flow is a term used for soil water movement in recent years. This is a sign to study the mechanism of soil water movement from uniform and uneven field. In the case of soil heterogeneity, referring to the composite effect of water and solute, the phenomenon of unsteady infiltration occurs along a specific path. Preferential flow is one of the main causes of geological disasters such as farmland rainfall landslide, mud flow, groundwater pollution and nutrient loss. Therefore, it is very important to study the priority process in detail. Starting from the definition of priority process, this paper mainly reviews the development of mathematical model of priority process and the technical methods and methods of research priority process. Finally, the paper summarizes the research and development trend of priority process.
Soil, Preferential Flow, Model