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研究溶质在非饱和带中的运动无论对于地下水资源评价和保护,还是对于农业生产——土壤盐渍化的防治和改良都具有十分重要的意义。 为了用数学模拟的方法准确地对盐分在土壤中的运动进行描述和预测,首先必须精确地求出有关的溶质运动参数——水动力弥散系数、吸附系数和质量交换系数等。其中最重要之一就是弥散系数。对于饱和弥散系数的求法比较成熟,而对于非饱和弥散系数
Studying the movement of solute in the unsaturated zone is of great significance not only for the evaluation and protection of groundwater resources but also for the prevention and improvement of agricultural production and soil salinization. In order to accurately describe and predict the movement of salinity in the soil by using mathematical simulation, we must first accurately determine the relevant solute movement parameters - hydrodynamic dispersion coefficient, adsorption coefficient and mass exchange coefficient. One of the most important is the dispersion coefficient. For saturated dispersion coefficient of the more mature, but for the unsaturated diffusion coefficient