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地下水系统作为水资源系统的一个有机组成部分，与地表水、土壤水、大气水之间有着极其密切的联系。从水资源系统出发，研究地下水与地表水、土壤水、大气水之间的内在转化关系，并将此种联系定量化耦合进地下水系统模拟模型，从而建立统一于水资源系统的地下水系统数学模型。这是构建大气、植物、包气带地下水系统（ＧＳＰＡＣ）统一体的重要组成部分。研究表明，所建模型对于准确预测地下水动态变化、提高地下水资源评价的精度和促进地下水、地表水、土壤水和大气水之间转化的研究有着重要意义。
As an integral part of the water resources system, groundwater systems are extremely closely linked to surface water, soil water and atmospheric water. Based on the water resource system, the inherent transformation relationship between groundwater and surface water, soil water and atmosphere water is studied, and this connection is quantitatively coupled into the simulation model of groundwater system to establish the groundwater system mathematical model unified with water resources system . This is an important part of building an atmosphere, plant, and gas-laden groundwater system (GSPAC) community. The research shows that the model is of great significance for the accurate prediction of the dynamic change of groundwater, the improvement of groundwater resource assessment accuracy and the promotion of the conversion between groundwater, surface water, soil water and atmospheric water.