| Soil wateris an important part in the natural hydrologic cycle,and it is the bound among groundwater?atmospheric waterand surface water,Through this,it can achieve the mutual supply and transformation among groundwater?atmospheric waterand surface water.As the most importantelement of the Earth'scritical zone,the pedosphere is the most active circle of the Earthsurface system,and the soil is the important node which controls the flow and transformation of the material,energy and informations.It plays an important role for preventing soil salinization and problem of groundwater pollution to studying on the migration law of soil water,heat and salt.In this paper,the following conclusions are obtained:1.The structure of sand and clay is more common in Shijiazhuang of Hebei Province,the influence of different factors have different degree of influence on the water,heat an d salt migration in soil of sand viscose interlayer structure.The influence degree of the groundwater TDS and the groundwater depth is relatively large,and the soil structure has little influence on it.4.According to the observation data of the outdoor soil multi-parameter Observation System,the water content and salt content of 30 cm below the surface in December are higher than August,and the temperature difference of 150 cm below the surface below 30 cm and below the surface is 7 ?,and August below 30 cm and below the surface of 150 cm at 2 ?.3.Through the field experiment data simulation results show that the contribution of soil water potential difference in soil salinity transport process is 67.9%,the contribution of temperature difference in soil salinity transport process is 29.8%,the concentration difference in soil Contribution during salinity transport is 2.3%. |
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