Study On Regional Soil Water Infiltration Based On Numerical Model

As the central component of the transformation of four waters and the key element of plant growth and development,soil moisture has important research significance under the influence of natural precipitation conditions or artificial agricultural activities,and the two main forms of water Only by transforming into the soil can it play its biggest role.In arid and semi-arid regions,when soil moisture cannot be supplied to plants in time,it will cause the growth of plants to be blocked,or the loss of soil moisture,leading to the emergence of land desertification.To this end,it is of great practical value to explore the changes of soil moisture in the soil.In general,the change of soil moisture value mainly depends on actual measurement data such as precipitation,soil,temperature,or meteorological data provided by weather stations,combined with mathematical models to determine soil water content,but the traditional method requires the human body to determine the soil water content.,material resources and time,and inevitably there is hysteresis in monitoring,which can not meet the real-time monitoring of soil moisture dynamic changes.By studying the effects of soil physical properties on soil moisture and water content changes,a numerical model of water volume change for a certain area is established by means of a theoretical model of soil water physical values,which can easily and quickly achieve soil moisture changes in a certain location or region.The research can solve the lag of the research on the change of soil moisture content to some extent.This study takes Huguan County of Changzhi City as the research area,and collects and measures soil physical data in the field.Firstly,using the measured data and theoretical model to establish the dynamic characteristics of soil hydraulic characteristics and soil moisture suitable for the region;Accuracy verification was carried out.Finally,the numerical model and geostatistical model were used to study the soil moisture changes in Huguan County.Research indicates:1.By using the HYDRUS model and measured data,the accuracy of the self-built soil moisture numerical model based on Visual Studio is reliable.2.The analysis and verification of model accuracy and parameter sensitivity show that in the numerical simulation,the soil hydraulic parameter parameters α and n play an important role in the model accuracy,and the adjustment error for the two parameters is generally 10%~20%.3.Based on Visual Studio’s self-built soil moisture numerical model,the soil moisture in the region can be better inverted.The simulation results are consistent with the actual situation and have high practical value and significance.4.Through the combination of self-built model,remote sensing inversion and inverse distance weighting,it can better reflect the mechanism model of regional soil water movement,and has important guiding significance for exploring regional water changes.