Seepage and seepage-pressure are important factors which influence the stability of dam foundation. Based on some measured data of gravity dam of Shiban Hydropower Station

taking into account the influence of water

temperature and time on the seepage and seepage-pressure of dam foundation

a statistical regression analysis model for seepage and seepage-pressure has been established by the stepwise regression analysis method. Computing results indicate that the statistical regression data for seepage and seepage-pressure are accordant with measured data; the statistical double correlation coefficients between them are larger; and the estimation standard errors between them are smaller. The statistical regression analysis model efficiently reflects the changing rule and developing trend of seepage and seepage-pressure of dam foundation. This model has provided efficient analysis means for evaluating safety properties of the gravity dam.