Verification and numerical simulation for water flow and heat transport under drip irrigation

The soil and water distribution condition is one of the key parameters for crop good quality and high yields, and the mathematical model was set up on the basis of combining soil water and heat moving basic equations with water moving features under drip irrigation. The HYDRUS-2D software was used to solve the mathematical model. The simulation value and the observation value gained from field measurement were compared. The results showed that the mathematical model could be commendably used to describe the soil water and heat transport properties, and the mathematical model could be used for monitoring and adjusting soil water and heat distribution in time when the soil information and weather data and drip irrigation arrangements could be attained. In addition, the comparison result between simulation value and the observation value revealed that the soil water and heat value in the upper soil layer was obviously affected by soil evaporation and atmosphere temperature fluctuation compared with deeper soil layer.