Hydrogeological problems for the rehabilitation and re-utilisation of the water resources of the mining area of Gavorrano (Italy).

The paper describes the hydrogeological problems linked to the rehabilitation and re-utilisation of the water resouces of the mining area of Gavorrano (Tuscany, Italy). It shows how the geological setting of the area control the water quality, chemistry and discharge. The results of the studies and the recent situations concerning circulation, quality and discharge of the mine water are reported, with particular reference to the effectsof the controlled water rebound and the complex measures necessary for the dewatering stoppage. Water rebound is analysed on the basis of available historical and recent data of its hydrodynamic influence and the consequences on water resources restoration. Different uses and possible action are proposed talking into account thermal chemical and discharge characteristics as well as local planning objectives