Article (Scientific journals)
Is it worth protecting groundwater from diffuse pollution with agri-environmental schemes? A hydro-economic modeling approach
Hérivaux, Cécile; Orban, Philippe; Brouyère, Serge
2013In Journal of Environmental Management, 128, p. 62-74
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Keywords :
hydro-economic model; cost-effectiveness analysis; cost-benefit analysis; groundwater,; agri-environmental schemes; European Water Framework Directive
Abstract :
[en] In Europe, 30% of groundwater bodies are considered to be at risk of not achieving the Water Framework Directive (WFD) ‘good status’ objective by 2015, and 45% are in doubt of doing so. Diffuse agricultural pollution is one of the main pressures affecting groundwater bodies. To tackle this problem, the WFD requires Member States to design and implement cost-effective programs of measures to achieve the ‘good status’ objective by 2027 at the latest. Hitherto, action plans have mainly consisted of promoting the adoption of Agri- Environmental Schemes (AES). This raises a number of questions concerning the effectiveness of such schemes for improving groundwater status, and the economic implications of their implementation. We propose a hydro-economic model that combines a hydrogeological model to simulate groundwater quality evolution with agronomic and economic components to assess the expected costs, effectiveness, and benefits of AES implementation. This hydro-economic model can be used to identify cost-effective AES combinations at groundwater-body scale and to show the benefits to be expected from the resulting improvement in groundwater quality. The model is applied here to a rural area encompassing the Hesbaye aquifer, a large chalk aquifer which supplies about 230,000 inhabitants in the city of Liege (Belgium) and is severely contaminated by agricultural nitrates. We show that the time frame within which improvements in the Hesbaye groundwater quality can be expected may be much longer than that required by the WFD. Current WFD programs based on AES may be inappropriate for achieving the ‘good status’ objective in the most productive agricultural areas, in particular because these schemes are insufficiently attractive. Achieving ‘good status’ by 2027 would demand a substantial change in the design of AES, involving costs that may not be offset by benefits in the case of chalk aquifers with long renewal times.
Disciplines :
Earth sciences & physical geography
Geological, petroleum & mining engineering
Author, co-author :
Hérivaux, Cécile;  Bureau de Recherches Géologiques et Minières - BRGM > Direction Eau, Environnement et Ecotechnologies > Unité Nouvelles Ressources et Economie
Orban, Philippe  ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement
Brouyère, Serge  ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement
Language :
English
Title :
Is it worth protecting groundwater from diffuse pollution with agri-environmental schemes? A hydro-economic modeling approach
Publication date :
2013
Journal title :
Journal of Environmental Management
ISSN :
0301-4797
eISSN :
1095-8630
Publisher :
Academic Press, London, United Kingdom
Volume :
128
Pages :
62-74
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
FP6 IP AquaTerra
Funders :
DG RDT - Commission Européenne. Direction Générale de la Recherche et de l'Innovation [BE]
Available on ORBi :
since 06 May 2013

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