The amount of solid waste generated increases each year. Landfill is the most common method of solid waste disposal currently being used in many parts of the world. The most common problems of the landfill site are environmental degradation and groundwater contamination caused by leachate produced during the decomposition process of organic material and rain fall. Most of landfill sites in developed countries have used Geosynthetic clay liners (GCLs) as landfill leachate barriers to protect the environment. In this article, the simulation of movement of water through the GCL cover using Hydrus-1D software. In total, 12 series oftests wereerformed to investigate the effect materials (PP/PET geotextiles and Isfahan/Arak bentonite) and mass unit area (4000/4500/5000 gr per m 2 ). Analysis of residual errors, differences between the measured and simulated values, was performed to evaluate the model performance, based on the mean absolute error (MAE), root mean square error (RMSE), coefficient of determination (CD), modeling efficiency (EF), and coefficient of residual mass (CRM). The outputs from the models were compared against the measured infiltrated water and water drained data. Simulated and measured Infiltrated water and water drained were in excellent agreement. Modeling efficiency of the drainage water model and infiltrated water are 0.8029 and 0.9770 ,respectively. The mean absolute error and root mean square error of 1.2949 and 1.4507 respectively to estimate the drained water infiltrated water estimation model models 4.2359 and 4.7184, respectively. The simulation results showed that although the model is a good estimate of the infiltration and drainage systems do, but the values obtained in early experiment in the laboratory with what is does not match. This shows that the hydrophobic characteristics of geotextiles not consider HYDRUS-1D software. The simulations indicate that Arak bentonite for use in geosynthetic clay liner coatings is better than landfill. Keywords: Geosynthetic clay liners, GCL, landfill, HYDRUS-1D