Reference : Delineating spring recharge areas in a fractured sandstone aquifer (Luxembourg) based...

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/10993/16424

Title :	Delineating spring recharge areas in a fractured sandstone aquifer (Luxembourg) based on pesticide mass balance
Language :	English
Author, co-author :	Farlin, J. [CRP Henri Tudor, Esch-sur-Alzette, Luxembourg]
	Drouet, L. [Fondazione Eni Enrico Mattei (FEEM)]
	Gallé, T. [CRP Henri Tudor, Esch-sur-Alzette, Luxembourg]
	Pittois, D. [CRP Henri Tudor, Esch-sur-Alzette, Luxembourg]
	Bayerle, M. [CRP Henri Tudor, Esch-sur-Alzette, Luxembourg]
	Braun, C. [CRP Henri Tudor, Esch-sur-Alzette, Luxembourg]
	Maloszewski, P. [Institute for Groundwater Ecology, Munich, Germany]
	Vanderborgt, J. [Institute of Bio-and Geosciences, Jülich, Germany]
	Elsner, M. [Institute for Groundwater Ecology, Munich, Germany]
	Kies, Antoine [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Publication date :	2013
Journal title :	Hydrogeology Journal
Publisher :	Springer Science & Business Media B.V.
Volume :	21
Pages :	799-812
Peer reviewed :	Yes (verified by ORBilu)
Audience :	International
ISSN :	1431-2174
City :	New York
Country :	NY
Keywords :	[en] Spring protection zones ; Atrazine ; Luxembourg ; Fractured Rock ; Groundwater pollution
Abstract :	[en] A simple method to delineate the recharge areas of a series of springs draining a fractured aquifer is presented. Instead of solving the flow and transport equations, the delineation is reformulated as a mass balance problem assigning arable land in proportion to the pesticide mass discharged annually in a spring at minimum total transport cost. The approach was applied to the Luxembourg Sandstone, a fractured-rock aquifer supplying half of the drinking water for Luxembourg, using the herbicide atrazine. Predictions of the recharge areas were most robust in situations of strong competition by neighbouring springs while the catchment boundaries for isolated springs were extremely sensitive to the parameter controlling flow direction. Validation using a different pesticide showed the best agreement with the simplest model used, whereas using historical crop-rotation data and spatially distributed soil-leaching data did not improve predictions. The whole approach presents the advantage of integrating objectively information on land use and pesticide concentration in spring water into the delineation of groundwater recharge zones in a fractured-rock aquifer.
Permalink :	http://hdl.handle.net/10993/16424
DOI :	10.1007/s10040-013-0964-5

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