A new well-aquifer coupling model for characterizing well hydrodynamics in abstraction well

摘要

The characterization of hydrodynamics near the abstraction well is a traditional, tough problem in several decades. In this paper, the mechanism of groundwater abstraction from aquifer and the relationship between the pumping well and the aquifer have been analyzed in detail. It is proposed that the well bore and the aquifer are two different systems. Therefore, after introducing the concept of potential velocity function, a new liquid flow model has been developed to describe the tube flow in the well by using pure liquid flow equation according to fluid dynamics. Then, coupling with traditional groundwater flow model, the new liquid-aquifer model has been constructed. The numerical procedure approximating well-aquifer model is derived based on tetrahedral element, and its computer programs is designed in FORTRAN code. The ideal case study demonstrates the validation of above model, which promotes the numerical characterization of well flow.