Thirty-two of the 58 reservoirs monitored had, at the end of September, water availability below 40% of the total volume, while three had values above 80%, according to data from the National Water Resources Information System (SNIRH).
On the last day of September and compared to the previous month, there was an increase in the volume stored in two river basins and a decrease in 10.
Barlavento (with 9%) and Lima (with 22.3%) basins had the lowest amount of stored water at the end of September, according to SNIRH data.
The storage averages for the month of September are in the Barlavento and Lima basins of 55.5% and 53.2%, respectively.
The Sado basins (34.7%), Mira (35.5%), Cávado (35.3%), Arade (37.9%), Oeste (45.2%), Tejo (46.6%) , Ave (49.3%) and Douro (49.8%) also had lower water availability at the end of September.
According to SNIRH data, the Guadiana (60.9%) and Mondego (62.7%) basins had the highest levels of storage at the end of September.
The September 2022 storages by watershed are lower than the September storage averages (1990/91 to 2020/21), except for the Arade basin.
Each watershed may correspond to more than one reservoir.