Aquifer Parameter Recognition Based on Numerical Simulation

A modeling method,which takes advantage of Groundwater Simulation Software(Modflow) coupled with large scale pumping test and long-term observation well, is proposed to identify and validate aquifer's parameter. This method avoids the uncertainty of obtained aquifer's parameter which existed in model validation of only conducting pumping test. In addition, when the global curve of pumping and recovering is fit by pumping test data, the relative error would be less than 6% in drawdown simulation, water balance accounting, overflow of spring as well as the simulation of flow field fit which improved accuracy of acquiring aquifer's parameter. The maximum relative error of water balance is 2.6%, the maximum relative of spring is 8.14%.The fact testifies that the method is high accurate and practical. The important is that it would provide experience to other research of the aquifer parameter calculation.