Abstract：The embedded depth of bedrock is shallow in Guangzhou City. The development of urban underground space will have certain impaction on the groundwater environment. To study the impaction，two fundamental problems have to be solved first. One is the simplified method for simulating an urban regional seepage field with 2D horizontal seepage FEM. The other is the stratum parameter of urban seepage field interpolation analysis. The simplified analysis method is based on the features of urban regional seepage fields. It presents an efficient way to model singular points of underground structures，suspended building foundations and gaps between buildings. These methods have a common goal：to simulate an urban regional seepage field using the 2D horizontal seepage FEM with minimal elements without losing accuracy. For the interpolation analysis，the Kriging interpolation method is used to predict values of the ground surface elevation，the ground water level，the rock surface elevation and the permeability coefficient. The results agree well with the actual situation，and they can be used as the calculation parameters when analyzing the urban seepage field of Guangzhou City.
