SciELO - Scientific Electronic Library Online

 
vol.36 número3A new approach to the step-drawdown testOptimisation of representative elementary area (REA) for the preparation of lineament density map of fractured rock aquifer índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • En proceso de indezaciónSimilares en Google

Compartir


Water SA

versión On-line ISSN 0378-4738

Resumen

TAIGBENU, AE  y  NYIRENDA, E. Revisiting the stream-aquifer flow problem with a flux-based Green element model. Water SA [online]. 2010, vol.36, n.3, pp. 287-294. ISSN 0378-4738.

This revisit of the stream-aquifer problem is based on a recent flux-based Green element formulation which offers more accurate solutions than previous formulations presented in Taigbenu (2003). Its accuracy also surpasses those provided by finite element and finite difference methods using grids that are coarser. As in all Green element formulations, the current formulation is predicated on the singular boundary integral theory that is implemented in an element-by-element fashion. What is new in the current formulation is that it calculates the fluxes at all nodes and not only at external nodes. While this approach exhibits much improved accuracy, its drawback lies with handling an increased number of unknowns. This drawback is, however, compensated for by the fewer elements required to achieve accuracies comparable to other conventional numerical methods. In this paper, it is demonstrated that with between 20% and 30% of elements used in finite element and finite difference models, comparable accuracy is achieved with this formulation. The main significance of the current computational technique is that it preserves the flux calculations in a manner that is consistent with the stream-aquifer interaction problem.

Palabras clave : stream-aquifer interaction; The Green element method.

        · texto en Inglés     · Inglés ( pdf )