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Spatially distributed , physically-based modelling for simulating the impact of climate change on groundwater reserves
Brouyère, Serge; Dassargues, Alain
2004In Webb, B.; Arnell, N.; Onof, Ch et al. (Eds.) Hydrology: science and practice for the 21st century
 

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Keywords :
impact of climate change; groundwater quantity; groundwater reserves; integrated hydrological modelling; groundwater deficits; impact on groundwater recharge
Abstract :
[en] If an increase in winter rainfall is foreseen in temperate areas like in Belgium, a shorter recharge season is also expected leading possibly in an uncertain trend for the total recharge of the aquifers. An integrated hydrological model (MOHISE) was developed in order to study the impact of climate change on the hydrological cycle in representative water basins in Belgium. This model considers all hydrological processes in a physically consistent way, more particularly groundwater flows that are modelled using a spatially distributed finite element approach. After detailed calibration and validation, quantitative interpretations can be drawn from the groundwater model results for different IPCC climate change scenarios. This integrated approach was applied to evaluate the impact of climate change on the water cycle in the Geer basin in Belgium. The river-aquifer interactions are explicitly taken into account in the model, as well as the spatial heterogeneity of the chalk geology characteristics. The groundwater model is described in detail. Modelling results are discussed in terms of climate change impact on the evolution of groundwater reserves. First results indicate that groundwater deficits may be expected in the future in Belgium. For this aquifer, the tested scenarios show no enhancement of the seasonal changes in groundwater levels. Moreover, this trend is computed, at this stage of the study, without taking into account aggravating factors like possible changes in land use and pumping conditions.
Research center :
Aquapôle - ULiège
Disciplines :
Geological, petroleum & mining engineering
Author, co-author :
Brouyère, Serge  ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement
Dassargues, Alain  ;  Université de Liège - ULiège > Département Argenco : Secteur GEO3 > Hydrogéologie & Géologie de l'environnement
Language :
English
Title :
Spatially distributed , physically-based modelling for simulating the impact of climate change on groundwater reserves
Publication date :
2004
Event name :
BHS2004, Hydrology: science and practice for the 21st century
Event organizer :
Imperial College
Event place :
London, United Kingdom
Event date :
July 2004
Audience :
International
Main work title :
Hydrology: science and practice for the 21st century
Author, co-author :
Webb, B.
Arnell, N.
Onof, Ch
MacIntyre, N.
Gurney, R.
Kirby, C.
Publisher :
British Hydrological Society
Collection name :
vol. 1
Pages :
9-14
Available on ORBi :
since 06 January 2009

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