carrying out a hydrogeological study relating to the estimation of the annual provisional withdrawal volumes and, as far as possible, during periods of low water by two simple approaches on each of the 26 warning zones of the Artois-Picardy basin

The purpose of this contract is to carry out a hydrogeological study relating to the estimation of the provisional annual withdrawal volumes and, as far as possible, during periods of low water by two simple approaches on each of the 26 warning zones of the basin Artois-Picardie.Il is understood that the provisional sampleable volumes estimated following the consultation are volumes that will have to be refined as knowledge of the objectives progresses. The studies must also allow, and significantly, knowledge gains, particularly for all the data necessary for the calculations proposed, with a view to carrying out gridded hydrogeological modelling in the short term.