L’AQUIFÈRE DES CALCAIRES CARBONIFÈRES REFERENCES ScaldWIN Project

an Interreg IVB NWE project for a better quality of surface and groundwater bodies in the Scheldt International River Basin District (IRBD)

→ WP3 include Study of the Carboniferous aquifer

Team of « Carboniferous » project

 France : MEL (ex-LMCU), AEAP, DREAL  + technical: BRGM  Belgium :Walloon region, Flemish region, Brussels  + technical: University of Mons

BRGM SERVICE GÉOLOGIQUE NATIONAL WWW.BRGM.FR SITUATION a transboundary aquifer

Aquifère partagé entre 3 régions:  Nord  Walloon region  And Flemish region Surface area ≈ 1400 km²

4 groundwater body (DCE):  Les Calcaires de Péruwelz-Ath-Soignies (RWE013),  Les Calcaires du Tournaisis (RWE060),  Les calcaires carbonifères de Roubaix- Tourcoing (FRAG015),  Kolenkalk (SS 1300 GWL 1).

several agglomerations: Lille-Roubaix- Tourcoing, Mouscron, Tournai…

BRGM SERVICE GÉOLOGIQUE NATIONAL WWW.BRGM.FR GEOLOGY

Aquifer contained in folded and faulted limestone layers East outcrop (Wallonia) where the recharge is located Undercover in the West

coupe

Légende image

BRGM SERVICE GÉOLOGIQUE NATIONAL WWW.BRGM.FR HYDROGEOLOGY

Recharge at East

Groundwater runoff towards West

Légende image

BRGM SERVICE GÉOLOGIQUE NATIONAL WWW.BRGM.FR (! (! !(! (! (! ( (! (! (!(! (! (! ! ® (! (!(!( (! (! (!(! Flobecq Comines-Warneton (! (!(!!(!(! (! (!(!(!(! (!(!(! (! (!(!(! (! (! (!(! ! (! (! (! (! (!((!(! (! (! Mont-de-l'Enclus (! (! (!( Mouscron (! PUMPING Tourcoing(! (! (!(! (! (! (! (! (!(! (! (! (! (! (! (!(! Ellezelles (!(!(! (!(!(! (! (! (! (! (! (! (! (! (! Lessines ! (!(! (! ! ((!(!! (! (! ((! (!! (! (! ( ( (! ( (! (! (! (! (! Estaimpuis Celles (!(! !(! (! (!(!(! (! (! (!((! (! (!(! (! ! (!(! (!(! (! (!(! (! Armentieres(! (!(! (! (! (!(! (!(! (! (! (! (! (! (!(!(!(! Roubaix(!(! (! (! Pecq(! Frasnes-lez-Anvaing Enghien (! (! (!(! (! (! !( (!(! (! (!(! (! (! (! (! (! (! (! (!(! ! (! (! (! (!(! (!(! (! Enghien (!(! (! (! (! (! Silly ! (!(! Ath (! (!(! ((! (! (! ! (! (! (! ( (! (! (! ! (! (! (! Uses : (! ( (! (! (! (! (! (!(! (! (! Lille (! (! (! (! (! (! Tournai (! (! ! (! (!(! ! (!(! (! (! ( (! ((! (! (! (!(!(! (! (! Brugelette(! (! (! (! (! (! (! (! (! (! (! (! Leuze-en-Hainaut(!(! (! (! (! (! (! (! (! Soignies  drinking water supply (! (! (! (! (! (! (!! (! (! (! (! (! (! ! (! ( (! (! (!(! (! ( (! (! (! (! (! (! (! (!(! (! Chièvres (! (! (! (! (! Lens (!(! (! Antoing (!  Industries (! (! (!(! (! Seclin (! Rumes (! (! (! (! (! (! (! (! Péruwelz (! Beloeil (! Brunehaut (! (! Jurbise (! (! (! (! (! (! (! (!(!(! (!  Quarry (! (!(!(! (!(! (! (! (! (! (! (! (! (! (! (! (! Saint-Ghislain Bernissart Mons

Quaregnon Hensies Légende Boussu Frontière franco-belge

ColfontaineFrance Frameries Qui‚vrain Région Flamande Dour (! Prélèvements dans le Carbonifère Région Wallone La Dendre Occidentale Extension du modèle Qu‚vy L'Escaut Accident de Kain La Deûle Honnelles La Marque La Dendre Orientale 03.75 7.5 15 22.5 (! PrélèvementsAffluent dans le Carbonifère Kilomètres Accident de Kain

ANNUALS VOLUMES PUMPED

BRGM SERVICE GÉOLOGIQUE NATIONAL WWW.BRGM.FR PIEZOMETRY overexploitation

Aquifer overexploited during the twentieth century. In some places, the drop in its piezometric level was of the order of 70 to 90 m.

BRGM SERVICE GÉOLOGIQUE NATIONAL WWW.BRGM.FR PERSPECTIVES

• Improvement of knowledge (geology, hydrogeology, geochemistry, etc.)

• update / construction / use of management tools (data exchange, update of models, simulation of predictive scenarios)

• Communication, dissemination, vulgarization (towards the public, managers, politicians, decision-makers)

BRGM SERVICE GÉOLOGIQUE NATIONAL WWW.BRGM.FR THE THANETIAN SANDS Another transboudary aquifer used for agriculture and drinking water supply,

Outcrop in South (France) where the recharge is located Undercover in the North overexploitation ?

Flandre –Artois /Extrait de la carte géologique au 1/1 000 000, BRGM, 1996, révisée en 2003.

BRGM SERVICE GÉOLOGIQUE NATIONAL WWW.BRGM.FR THANKS FOR YOUR ATTENTION [email protected]