Automatic calibration of groundwater models by the head gradient method - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 1997

Automatic calibration of groundwater models by the head gradient method

(1)
1

Résumé

A groundwater model for flow and transport is reliable only if it is properly calibrated on observations. The best way to ensure a high predictive capability is to limit the number of parameters by defining homogeneous zones. These zones may be defined by an inverse model based on the gradient method. This paper describes a new scheme of inverse model for irregular finite difference 3D models in steady-state. The method determines, in each grid cell, the modification of hydraulic conductivity necessary to adjust the computed head gradients to the observed ones and yields the hydraulic conductivity in the centre of each grid cell. The stability of the results is forced through an optimization scheme simultaneously minimizing the differences of hydraulic conductivity between adjacent grid cells. After determination of the hydraulic conductivity, a procedure derives automatically optimal clusters of values defining geographical zones where homogeneous values of hydraulic conductivity may be imposed. The inverse modelling scheme is operational and applications to four real aquifer systems are presented.
Fichier principal
Vignette du fichier
Publi_Iahs_220_0291_1993_DTH_Head_Gradient_Calibrat.pdf (633.38 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01061969 , version 1 (08-09-2014)

Identifiants

  • HAL Id : hal-01061969 , version 1

Citer

Dominique Thiéry. Automatic calibration of groundwater models by the head gradient method. Tallinn Conference, GQM93, 1993, Groundwater Quality Management, Sep 1993, Tallinn, Estonia. pp. 281-292. ⟨hal-01061969⟩

Collections

BRGM
99 Consultations
355 Téléchargements

Partager

Gmail Facebook Twitter LinkedIn More