title: Analytical model for computing residence times near a pumping well.
abstract: An analytical solution for calculating the residence time of fluid flowing toward a pumping well in an unconfined aquifer has been developed. The analytical solution was derived based on a radial, steady-state, Dupuit-Forchheimer flow model. The resulting integral expression involved computing the imaginary error function, for which a simple series expansion is proposed. The validity of the analytical expression is demonstrated by testing its results against numerical results for an example problem. The analytical solution compared favorably with the numerical approximation.
authors.affiliation: Centre for Water Research, The University of Western Australia, Nedlands, WA-6907, Australia.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Simpson
authors.forename: T Prabhakar
authors.initials: TP
authors.lastname: Clement
authors.forename: Francis E
authors.initials: FE
authors.lastname: Yeomans
mesh_terms: D005544:Forecasting; D008962:Models, Theoretical; D011312:Pressure; D014872:Water Movements; D014881:Water Supply