title: Revisit of well function approximation and an easy graphical curve matching technique for Theis' solution.
abstract: Some approximations of Theis' solution are reviewed and compared with the numerical evaluation of the exponential integral by means of a short FORTRAN code. A graphical technique of Theis' curve matching is proposed to make this procedure as easy as plotting a graph.
authors.affiliation: Geosystem Exploration and Petroleum Geoengineering Program, School of Civil Engineering, Asian Institute of Technology, AIT P.O. Box 4, Klong Luang, Pathumthani 12120, Thailand. hgiao@ait.ac.th
authors.forename: Pham Huy
authors.initials: PH
authors.lastname: Giao
mesh_terms: D008962:Models, Theoretical; D014872:Water Movements; D014881:Water Supply