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Record nummer 1949582
Titel artikel Upward groundwater flow in boils as the dominant mechanism of salinization in deep polders, The Netherlands
Auteur(s) Louw, P.G.B. de ; Oude Essink, G.H.P. ; Stuyfzand, P.J. ; Zee, S.E.A.T.M. van der
Tijdschrifttitel Journal of hydrologic engineering
Deel(Jaar)Nummer 394(2010)3/4
Paginering 494 - 506
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Trefwoorden (cab) kwel / grondwater / zout water / waterstroming / polders / chloride / holoceen / grondwaterkwaliteit / zuid-holland
Rubrieken Grondwaterhydrologie
Publicatie type Wetenschappelijk artikel
Taal Engels
Toelichting (Engels) As upward seepage of saline groundwater from the upper aquifer is leading to surface water salinization of deep polders in the Netherlands, we monitored the processes involved in the Noordplas Polder, a typical deep polder. Our results show three types of seepage: 1) diffuse seepage through the Holocene confining layer, 2) seepage through paleochannel belts in the Holocene layer, and 3) intense seepage via localized boils. They differ with regard to seepage flux, chloride concentration, and their location in the polder; thus, their contributions to surface water salinization also differ. Permeable, sandy paleochannel belts cut through the lower part of the Holocene layer, resulting in higher seepage fluxes than the diffuse seepage through the Holocene layer where there are no paleochannels. The average chloride concentration of paleochannel seepage is about 600 mg/l, which is sixfold higher than the average concentration of diffuse seepage.
Betrokken instanties Deltares
KWR, Watercycle Research Institute
Vrije Universiteit Amsterdam, Faculteit der Aardwetenschappen
WUR
Vrije Universiteit Amsterdam
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