Titre :
|
Effect of shallow penetration and streambed sediments on aquifer response to stream stage fluctuations (Analytical model)
|
Auteurs :
|
V. Zlotnik ;
H. Huang
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
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1999
|
Format :
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p. 599-605
|
Langues:
|
= Anglais
|
Catégories :
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EAU
|
Mots-clés:
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RELATION NAPPE RIVIERE
;
PERMEABILITE
;
INFILTRATION
;
MODELE MATHEMATIQUE
;
BERGE
;
SEDIMENT
;
CONDUCTIVITE HYDRAULIQUE
|
Résumé :
|
An analytical model of stream-aquifer interaction is proposed that considers the effects from a small degree of aquifer penetration and low-permeability sediments on the head response to an arbitrary stream-stage hydrograph. Aquifer sections under the stream and beyond are considered in a single model. The model of ground water flow in the aquifer is based on the Dupuit assumptions corrected for leakage from the stream. The model can use stream-stage hydrographs in both analytical and tabular forms. The nondimensional linear boundary value problem is solved for hydraulic head in the aquifer using numerical Laplace transforms and a convolution algorithm. The proposed solution is used to assess the impact of shallow penetration and low-permeability streambed sediments on head responses by comparison with available solutions which neglect these factors.
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Source :
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Ground water, vol.37, n°4
|