More than half of the 59 Portuguese reservoirs monitored had, at the end of May, above 80% of the total volume, while four had values below 40%, according to data from the National Water Resources Information System (SNIRH).
On the last day of May and compared to the last day of the previous month, there was an increase in the volume stored in five river basins and a decrease in seven.
The Ribeiras do Barlavento basin was the one with the lowest water availability at the end of May, with 31.7%, followed by Mira (49.3%).
According to SNIRH data, the Mondego (89.3%), Tejo (87.7%), Guadiana (86.6%), Douro (83.7%), Cávado and Ave (81.3%) basins, West (79.5%), Arade (72.8%), Lima (70%) and Sado (68%) had the highest levels of storage at the end of May.
The May 2021 storages by watershed are higher than the May storage averages (1990/91 to 2019/20), except for the Lima, Mondego, Mira and Ribeiras do Algarve basins.
Each hydrographic basin can correspond to more than one reservoir.
Original article available in Portuguese at http://postal.pt/
