Determination of Hydrogeological Parameters in Fissured Aquifer of a Water Source Field

The determination of hydrogeological parameters of the aquifer is very important for understanding the characteristics of groundwater movement and calculating the amount of groundwater resources.The pumping test is the main method to determine the parameters.One unsteady flow pumping test and two stable flow pumping tests are conducted at a water source field.Under the support of Aquifer Test Software,using a variety of mathematical models,the hydrogeological parameters of a fissured aquifer in the study area are calculated and determined.The calculation results show that: the hydraulic conductivity of the aquifer shows the anisotropy;the hydraulic conductivity of the vertical direction of groundwater flow is greater than the value of the parallel direction of groundwater flow,which is 25.81 m/d and 17.51 m/d,respectively;the elastic storage coefficient is much smaller than the specific yield,which is 0.000 378 and 0.145,respectively,so the elasticity release amount of the aquifer water can be ignored in the water resources evaluation process.