Abstract: A simple one-dimension model considering fluid movement in unsaturated soils is proposed to simulate the rainfall infiltration process and explain its possible effect on apparent resistivity of the Earth. A convolution filtering method is adopted to analyze rainfall effect on apparent resistivity. As a case study, the result of the Changli Station is reported. The study may provide information for the quantitative analysis of geoelectric observation data.

Key words: rainfall, apparent resistivity, noise, infiltration, convolution filtering

摘要： 采用一维非饱和地下水在重力作用下的不稳定运动模型，来模拟降水在土壤中的渗透过程。调整各种与渗流过程有关的物理参数以及考虑蒸发的影响，采用理论上的计算结果来解释降水在土壤中渗流达到稳定的过程。以昌黎台为例，采用褶积滤波和多元回归的方法来定量分析降雨对视电阻率的影响，为定量分析实际资料提供一定的参考依据。

关键词: 降水, 视电阻率, 干扰, 渗流, 褶积滤波