Multi-compartment modelling for aquifer parameter estimation using natural tracers in non-steady flow

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Abstract

A method is developed for aquifer parameter estimation incorporating dissolved hydrochemical constituents and environmental isotopes. This model is developed for basins with lack of hydrological information but with enough wells to allow for hydraulic head measurements and water sampling for chemical and isotoic analyses. It was developed for aquifer systems with observed hydraulic head fluctuations. The model is based on a distributed parameter approach in which the aquifer is represented by a finte number of cells. Inflows through external aquifer boundaries and internal fluxes are evaluated by optimizing a set of mass balance equations expressing the conservation of water, isotopes and dissolved chemicals. Storativity and transmissivity coefficients are then evaluated by the previously calculated flow components and the periodic changes in hydraulic heads. This paper presents a methodology to enhance the accuracy of estimated physical parameters in heterogeneous and anisotropic aquifers by adding chemical and isotopic information.

Original languageEnglish
Pages (from-to)84-89
Number of pages6
JournalAdvances in Water Resources
Volume12
Issue number2
DOIs
StatePublished - 1 Jan 1989

Keywords

  • Aquifer parameter estimation
  • compartmental modelling of non-steady flow
  • environmental tracers
  • hydrochemistry
  • isotopes

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