Abstract
Groundwater modeling has become a popular approach and common of conducting groundwater flow and contaminant transport simulation. Consequently, in order to understand the behavior of groundwater flow, this study has established and developed conceptual model of groundwater at Phukham Copper - Gold operations mining. In addition, this study is applied Groundwater Modeling System (GMS) 6.5 software and using MOFLOW Package which employs advanced mathematics as Finite Difference Method (FDM). Steady Flow model is set up and calibrated within target ± 2 meters; then the model is run in MOFLOW in order to obtain acceptable observed and simulated hydraulic head by adjusting hydraulic conductivities and recharge values. Recharge rate is adjusted between 2% to 12% from annual rainfall 0.00475 m/d and it is found out to be 7.22 % or 0.00034 m/d. Model has come up with reasonable finding. Hence, root mean square error of steady state: layer1, 2, 3 and 4 are 1.840 m, 1.767 m, 1.963 m and 0.574 m, respectively. The coefficient of determination of steady state for layer1, 2, 3 and 4 are 0.965, 0.96, 0.959 and 0.985, respectively.
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