Aquifer Parameter Recognition by Combining Simulation of Pumping Test and Water Level of Long-term Observation Well

In order to calculate aquifer parameters accurately,a modeling method was proposed to identify and validate aquifer parameters by taking advantage of groundwater simulation software—Modflow coupled with large scale pumping test and long-term observation well.The method of aquifer parameter recognition avoids the uncertainty which existed in model validation with only conducting pumping test.When the whole curve in period of pumping and recovering was fit by field pumping test data,the relative error would be less than 6% in drawdown simulation,which improved accuracy of acquiring aquifer parameters.