根据水盐均衡原理提出一种区域土壤水盐动态预测预报方法。通过水均衡求解,确定出区域内各点的蒸发量和入渗量。在盐分运动模拟中考虑了地下水面以上土体中土壤盐分驱替的实质,在非饱和土壤盐分运动的求解过程中不同求解非饱和水分运动,而用蒸发入渗量决定非饱和带的盐分运动。模拟结果表明本模型精确可靠。 According to the principle of water and salt balance, a method of regional soil water and salt dynamic forecasting is proposed. Through the water equilibrium solution, to determine the area of ​​the evaporation and infiltration of the various points. Considering the essence of soil salt displacement in the soil above the groundwater in the salt movement simulation, the unsaturated water movement is solved differently in the process of solving the salt movement in unsaturated soils, and the salt infiltration in the unsaturated zone is determined by the evaporation infiltration . Simulation results show that the model is accurate and reliable.