Titre :
|
Analysis of flow behavior in a landfill with cover soil of low hydraulic conductivity
|
Auteurs :
|
Y. Jang
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
|
2000
|
Format :
|
p. 292-298
|
Langues:
|
= Anglais
|
Catégories :
|
DECHETS
|
Mots-clés:
|
DECHARGE
;
CONDUCTIVITE HYDRAULIQUE
;
SIMULATION NUMERIQUE
;
LIXIVIATION
;
SOL
;
POMPAGE
;
ETANCHEITE
|
Résumé :
|
This paper presents the results of field tests oh hydrologic parameters in a landfill and the results of numerical simulation to find the efficiency of the pumping method to reduce leachate levels in the landfill. The field hydraulic conductivity and storativity of waste and buried cover soils in the landfill are measured by pumping and slug tests. The hydrologic condition inside the landfill is first calibrated using the drawdown-time curve obtained from the pumping test, and the flow behavior of leachate during pumping in the landfill, when various layers of waste and buried cover soil exist, is analyzed through three-dimensional numerical simulation of flow. The results of the field investigation show that the buried cover soil of low hydraulic conductivity forms an impermeable layer preventing the downward flow of leachate and upward flow of landfill gas.
|
Source :
|
Environmental geology, vol.39, n°3-4
|