Delineating Spring Recharge Areas in a Fractured Sandstone Aquifer (Luxembourg) Based on Pesticide Mass Balance

42 Pages Posted: 15 Sep 2014

See all articles by Julien Farlin

Julien Farlin

Luxembourg Institute of Science and Technology (LIST)

Laurent Drouet

Fondazione Eni Enrico Mattei (FEEM)

Tom Gallé

Luxembourg Institute of Science and Technology (LIST)

Denis Pittois

Luxembourg Institute of Science and Technology (LIST)

Michael Bayerle

Luxembourg Institute of Science and Technology (LIST)

Christian Braun

Luxembourg Institute of Science and Technology (LIST)

P. Maloszewski

Helmholtz Center Munich

J. Vanderborght

Helmholtz Center Munich

Martin Elsner

Helmholtz Zentrum, Institute for Groundwater Ecology

Antoine Kies

Universite du Luxembourg

Date Written: September 12, 2014

Abstract

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.

Keywords: Spring Protection Zones, Atrazine, Luxembourg, Fractured Rock, Groundwater Pollution

JEL Classification: Q5, Q53

Suggested Citation

Farlin, Julien and Drouet, Laurent and Gallé, Tom and Pittois, Denis and Bayerle, Michael and Braun, Christian and Maloszewski, P. and Vanderborght, J. and Elsner, Martin and Kies, Antoine, Delineating Spring Recharge Areas in a Fractured Sandstone Aquifer (Luxembourg) Based on Pesticide Mass Balance (September 12, 2014). FEEM Working Paper No. 76.2014. Available at SSRN: https://ssrn.com/abstract=2495308 or http://dx.doi.org/10.2139/ssrn.2495308

Julien Farlin (Contact Author)

Luxembourg Institute of Science and Technology (LIST) ( email )

29, avenue John F.Kennedy
Luxembourg, L-1855
Luxembourg

Laurent Drouet

Fondazione Eni Enrico Mattei (FEEM) ( email )

C.so Magenta 63
Milano, 20123
Italy

Tom Gallé

Luxembourg Institute of Science and Technology (LIST) ( email )

29, avenue John F.Kennedy
Luxembourg, L-1855
Luxembourg

Denis Pittois

Luxembourg Institute of Science and Technology (LIST) ( email )

29, avenue John F.Kennedy
Luxembourg, L-1855
Luxembourg

Michael Bayerle

Luxembourg Institute of Science and Technology (LIST) ( email )

29, avenue John F.Kennedy
Luxembourg, L-1855
Luxembourg

Christian Braun

Luxembourg Institute of Science and Technology (LIST) ( email )

29, avenue John F.Kennedy
Luxembourg, L-1855
Luxembourg

P. Maloszewski

Helmholtz Center Munich ( email )

Institute for Bioinformatics and Systems Biology
Ingolstaedter Landstrasse 1
Neuherberg, 85764
Germany

J. Vanderborght

Helmholtz Center Munich ( email )

Institute for Bioinformatics and Systems Biology
Ingolstaedter Landstrasse 1
Neuherberg, 85764
Germany

Martin Elsner

Helmholtz Zentrum, Institute for Groundwater Ecology ( email )

Munich, DE
Germany

Antoine Kies

Universite du Luxembourg ( email )

L-1511 Luxembourg
Luxembourg

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