Titre :
|
Hydraulic conductivity of gravel and sand as substrates in rock-reed filters
|
Auteurs :
|
W. Sanford ;
T. Steenhuis ;
J. Parlange ;
AL Et
|
Type de document :
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article/chapitre/communication
|
Année de publication :
|
1995
|
Format :
|
p. 321-336
|
Langues:
|
= Anglais
|
Catégories :
|
EAU
|
Mots-clés:
|
ZONE HUMIDE
;
DEPOLLUTION
;
DECHARGE
;
CONDUCTIVITE HYDRAULIQUE
;
CALCUL
;
PREVISION
|
Résumé :
|
Long-term use of a constructed wetland to treat landfill leachate requires that the saturated hydraulic conductivity be maintened and clogging avoided to prevent overland flow, which bypasses the treatment process. This paper describes the application of an equation developed for prediction of cumulative drainage volume from hillslopes to measure the saturated hydraulic conductivity (Ks) of substrates used in rock-reed filters. Outflow was measured at five intervals during the first 26 months of operation. The values of Ks obtained by the drainage equation compared favorably with values calculated from a more difficult method based on Darcy's law.
|
Source :
|
Ecological engineering, vol.4
|