Estimation Of Aquifer Hydraulic Parameters Using The Flood Wave Response Method

In humanity or natural conditions,closelyhydraulic connection and frequentconversion relationship exist between river andgroundwater. With the construction ofthe China national groundwater monitoring network, a large amount of data ongroundwater response to flood will be collected. This data can be used to calculateaquifer hydraulic parameters that are the key issue to study groundwater/river waterinteraction. However, no simple and effective methods are available in Chinacurrently.This study carried out the inversion of hydraulic parameters in different scale. Inthe plot scale, the traditional pumping test was improved. The packer technique wasapplied in9layers of2boreholes and hydraulic parameters of different zones werecalculated. In catchment scale, a new method was introduced in this study. Themethod uses the convolution and optimization technique to calculate aquifer hydraulicparameters, is applicable to non-fully penetrating rivers, can treat arbitrary rive stageand can be used widely.To facilitate the application of the method, the authors presented the excel-basedcalculation procedures and used excel to calculate the convolution and to fitautomatically. We carried out flood wave tests in the Bulaihe River in the Yulin areaof Shaanxi, and calculated aquifer hydraulic parameters using flood wave method,and compared with the parameters derived from pumping tests. The comparisonshows that the difference is about16%, which stratifies the practical work. This studypresents a new method that can be used to fully mining the data on groundwaterresponse to flood and provide technical support to calculate the exchange rate ofgroundwater/river water and to protect the eco-environments in the hyprothetic zones.