Here we see the cross-section below Venice.
You have Venice, then the lagoon, left and right of Venice, then on the right hand side an island called Lido, and then the Adriatic Sea, where on the left hand side is the industrial part of Venice, which is Marghera and Mestre, and it is where the main pumping took place.
You see below we have six aquifers, numbered from 1 to 6, and then there is one aquifer numbered A, which is not exploited for, because the water is partly salty. Now, for modelling purposes we have along together the 5 and the 6 aquifer.