Solution of hydrogeological parameters of the Cretaceous aquifers in Longdong basin

Water resource shortage is seriously restricting the economic development in Longdong basin,but since recent years,exploration has proved very thick underground fresh water in Cretaceous Luohe Formation.It is the key to solve the hydrogeological parameters for assessment of deep groundwater resources.Pumping test used to determine the aquifer hydrogeological parameters constitutes the important content in hydrogeological investigation.According to pumping test data of single well,multiple wells and interference well,various methods for steady and unsteady flow have been adopted to solve the hydrogeological parameters of aquifer,avoiding contingency,randomness of a single method,and the calculation results are reliable.Finally,the paper discussed the influence of the difference of hydrogeological conditions at pumping test site and the theoretic conditions of the selected formula on the calculation results.