Hydrogeological functions of a large pumping test

Exemplified by the Xiamatou groundwater wellfield in Dong'e County, Shandong, the hydrogeological functions of a large pumping test is discussed in this paper. Based on data of a large pumping test, the followings can be determined: the recharge sources and their directions, influence scope and extent of the pumping test, aquifer productivity and guarantee capacity of water supply, hydrologic relationships among the karst water, porous water and Yellow River, hydrologic characteristics of the main faults around the wellfield, influence of the test on the neighboring wellfields, as well as hydrogeologic parameters and available well yielding.