عنوان مقاله [English]
Due to shortage of rainfall in Iran, the owners of Industries and businesses that their field of work are related to water are use ground water resources to compensate this shortage. This matter in Iranian plains like Kabudarahang plain, which is located in the Hamedan, Iran province led to drawdown of water levels in the aquifers and irreparable consequences has been followed. In this study, at first in ARC GIS maximum depth of bed was appointed. Then draw down of groundwater levels of Kaboudarahang were modeled and analyzed using MODFLOW hydraulic model at GMS software in the period of 2002 to 2011. Also hydraulic conductivity coefficients and specific yield coefficient were calibrated and verified. The results of statistical indices show that the model simulates the fluctuations of groundwater levels with an acceptable level of accuracy in Kabudrahang. The study followed by doing sensitivity analysis for surface feeding and specific yield parameters that calculated results shown specific yield is more effective. Then the drawdown of ground water levels in wells is predicted up to 2022 that estimated largest drawdown was about 5 meters.