Abstract: Pervious ground temperature is difficult to estimate because it can be affected by many factors，such as solar radiation，surface convection heat transfer，evaporation and heat dissipation． Based on the heat and humidity control equation，the heat transfer process between the permeable surface and the surrounding environment was nu- merically analyzed，and the hourly temperature calculation model at different depths of the permeable surface was deduced． Then the calculation program was compiled to calculate the permeable surface temperature． The calcula- ted temperature was compared with the measured surface temperature． The results show that the numerical calcula- tion value is basically in accordance with the measured value，and the maximum relative error is less than 3． 5% ． the study shows that the derived numerical method can be used as an effective method to predict the permeable sur- face temperature． Based on this，the equivalent solar radiation absorption coefficient concept is proposed，which can be directly used to evaluate the solar heat gain of permeable surface with different water content．

Key words: pervious ground, dynamic heat balance model, equivalent solar radiation absorption coeff icient