Isopièzes en mNGF (courbes de niveau correspondant aux altitudes de la nappe) de l'aquifère tertiaire du bassin de la Forêt du Theil en avril 1973 (période de hautes eaux).
Référence bibliographique : S. KUKLAN, H. TALBO (1973). Nappe du bassin tertiaire de la Forêt du Theil (Ille-et-Vilaine). Surveillance piézométrique. Période Avril 1972 - Mars 1973 - Rapport BRGM 73-SGN-148-BPL.
Pour obtenir plus de détail consulter l'article : http://sigesbre.brgm.fr/Cartes-piezometriques-215.html
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