Computer forecasting of the soil water infiltration parameters in seasonal freezing and thawing periods

Based on the tests of field soil water infiltration under three kinds of soil texture in three freezing and thawing periods, with the help of the method of mathematical statistics, a forecasting model of soil infiltration parameter in seasonal freezing and thawing periods has been established. The result indicates that it is feasible to forecast the soil water infiltration parameters in seasonal freezing and thawing periods through soil transmission function; when content of soil physical sticky granule, soil dry density, soil moisture content and soil temperature are chosen for input variables of the model, a satisfactory forecasting accuracy can be obtained; compared with the Product model, the multivariate linear forecasting model has higher precision. The establishment of the forecasting model has scientific meaning for enriching freeze–thaw soil physical theory, and is of practical significance for determining the reasonable irrigation technical parameters in these seasonal freezing and thawing districts within the winter and early spring seasons.