Simulation of Groundwater Contamination in Ningzhuang Coalmine, China

Groundwater has been seriously contaminated in Ningzhuang coalmine, China. In order to study contanminant trend, the sandstone aquifer system of Shanxi formation and upper limestone aquifer system of Taiyuan formation of Ningzhuang coalmine are investigated in this study. The sandstone aquifer system of Shanxi formation and upper limestone aquifer system of Taiyuan formation are of confined aquifer. Viual Modflow2000 was applied to simulate the three dimensional groundwater flow for the sandstone aquifer system upper limestone aquifer system of Taiyuan formations. The results of the model calibration and verification showed reasonable agreement between observed and calculated drawdown for the observation wells. The range of pollutants dispersion unfolds like a spindle and the pollutant migrate from the center to the two pump wells, so the concentration of the pollutant is highest in central area. After ten years, the range changes like an egg style and increases obviously, extending 400 to 1000m away the source.