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对两类降雨入渗计算模型进行了研究:①简单的水量平衡模型;②数值模拟模型。这两类模型的假定条件和非饱和的理论概念差别很大。两类模型在非饱和区中的应用表明,在非饱和区均质土壤条件下,水量平衡模型计算的降雨入渗补给量与应用数值模拟模型计算所得结果基本相吻合。灵敏度分析表明了地下水位变动对降雨入渗补给的影响。假定地下水位不变所造成的误差可作为水文地质参数的一个函数来处理。本文研究成果在一定水文地质条件下的非饱和水流模型、饱和水流模型或排水模型系统计算中具有十分重要的参考应用价值。
Two types of rainfall infiltration calculation models were studied: ① simple water balance model; ② numerical simulation model. The assumptions of these two models differ greatly from the theoretical concepts of unsaturation. The application of the two models in the unsaturated zone shows that the rainfall infiltration recharge quantity calculated by the water balance model is in good agreement with that calculated by the numerical simulation model under the condition of homogeneous soil in the unsaturated zone. Sensitivity analysis shows that the impact of groundwater level changes on rainfall infiltration recharge. The error caused by the assumption of constant groundwater level can be treated as a function of hydrogeological parameters. The results of this paper have very important reference value in the calculation of unsaturated water flow model, saturated water flow model or drainage model system under some hydrogeological conditions.