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  • P-ISSN3059-0604
  • E-ISSN3059-1309
  • KCI

MODEL FOR THE CONTAMINATION OF CONFINED AQUIFERS BY POLLUTANTS

한국수학교육학회지시리즈B:순수및응용수학 / Journal of the Korean Society of Mathematical Education Series B: Theoretical Mathematics and Pedagogical Mathematics, (P)3059-0604; (E)3059-1309
1999, v.6 no.2, pp.113-120
Bestman, A.R. (Department of Mathematics, Port Harcourt University)
Odigi, M.I. (Department of Geology, Port Harcourt University)

Abstract

This paper studies the problem of an infinite confined aquifer which at time t < 0 is assumed motionless. At time t = 0 crude oil seeps into the aquifer, thereby contaminating the valuable drinking water. Since the crude oil and water are im-miscible, the problem is posed as a one-dimensional two-phase unsteady moving boundary problem. A similarity solution is developed in which the moving front parameter is obtained by Newton-Ralphson iteration. A numerical scheme, involving the front tracking method, is devised employing the fourth order Runge-Kutta method. Comparison of the exact and numerical schemes shows an error of only 3%. Thus the developed numerical scheme is quite accurate in tackling more realistic problems where exact solutions are not possible.

keywords
aquifer, fourth order Runge-Kutter method

한국수학교육학회지시리즈B:순수및응용수학