The Minimum Vital Outflow (DMV) is the instantaneous flow rate, to be determined in each homogeneous stretch of the watercourse, in order to guarantee ecological integrity for the protection of aquatic life, ensure balanced use of the water resource and protect the balance of water and hydrogeological balance. The Water Protection Plan identifies the methods for determining and applying the corrective factors of the DMV on the basis of the criteria identified by the District Basin Authorities. The factor (Q) expresses the dilution requirements of the pollutants conveyed in watercourses according to existing anthropic activities and is modulated in an interval between 1.00 and 1.60. The Q values are determined on the basis of the periodic update of the status of surface water bodies.
