LUMPED Unsteady: a Visual Basic (R) code of unsteady-state lumped-parameter models for mean residence time analyses of groundwater systems

Ozyurt N. N. , BAYARI C. S.

COMPUTERS & GEOSCIENCES, vol.31, no.3, pp.329-341, 2005 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31 Issue: 3
  • Publication Date: 2005
  • Doi Number: 10.1016/j.cageo.2004.09.024
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.329-341


A Microsoft (R) Visual Basic 6.0 (Microsoft Corporation, 1987-1998) code of 9 lumped-parameter models of unsteady flow is presented for the analysis of mean residence time in aquifers. Groundwater flow systems obeying plug and well-mixed flow models and their combinations in parallel or serial connection can be simulated by the code. Models can use tritium, tritiugenic He-3, oxygen-18, deuterium, krypton-85, chlorofluorocarbons (CFC-11, CFC-12 and CFC-113) and sulfur hexafluoride (SF6) as the environmental tracers. The executable code runs under all 32-bit Windows operating systems. Details of the code are explained and its limitations are indicated. (c) 2004 Elsevier Ltd. All rights reserved.