The phenomenon of freeze-thaw erosion is widespread in Northeast China,and the main reason is that the water inside the soil is deformed by frost heave.In this complex geological evolution process,the soil expands and is accompanied by deformation.Once this phenomenon continues,it will trigger further expansion of the soil,and then accelerate the process of soil erosion.This change not only has a serious impact on agricultural production,but also poses a great challenge to the protection of land resources.The study analyzes the influence of freeze-thaw on sand erosion;compares the bulk density,moisture content,porosity and permeability coefficient of soil before and after freeze-thaw action,and analyzes the influence of freeze-thaw on sand erosion.The bulk density of soil decreases with the increase of freeze-thaw cycles,while the porosity increases.Under freeze-thaw action,the porosity increases with the increase of initial water content.With the increase of temperature,the permeability of soil also increases.In general,the freeze-thaw process will change the bulk density,porosity,permeability and permeability of soil,as well as soil structure,which will have an important impact on soil erosion.This will help to rationally use land resources,reduce soil erosion and environmental damage,and have a more comprehensive understanding of the erosibility of sand.
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