The volume of water stored in the Bravura Dam, in Lagos, on 19 September, it was only 9,2%, a figure well below the usual average at this time of year, which is usually around 56%.
The data appear in the latest water availability map in Portugal, released by the Portuguese Environment Agency (APA) on the website of the National Water Resources Information System, and show a decrease of 0,6 percentage points, in this reservoir, in relation to the end of August.
Comparing the values of the hydrographic basins, it is still possible to see that the Barlavento, which only integrates the Bravura dam, has the lowest volume stored in the country, followed by the Lima basin (21,6%).
As for the Guadiana basin, which includes the Algarve reservoirs of Odeleite and Beliche, the data are more encouraging, with a stored volume of 61,9% (only 0,2% below average), thanks largely to the Alqueva Dam. , which has a volume of 65%. Odeleite has 36% of its total capacity and Beliche has 29%.
The volume of the Arade Basin is 38,5% (at the end of August it was 39,8). In this basin, the Funcho reservoir is the only one above 60% (61%). Arade is at 28% and Odelouca at 34%.
In Alentejo, the Sado Basin has 34,1% of its total capacity (1,2% less than in the previous month) and the Mira Basin has 35,7% (0,5% less). In this basin, the Santa Clara dam is at 36%.
Despite the rains in September, there are still no notable differences in the storage levels of the southern reservoirs, which register a lower volume than at the end of last month.
At national level, the data from 19 September, when compared to the previous weekly bulletin (12 September), show that, of the 58 reservoirs monitored, only five have water availability greater than 80% of the total volume and 29 have availability below 40% of the total volume.
According to the report, storage in the third week of September by river basin is lower than the storage averages for September (1990/91 to 2020/21), except for the Ave, Douro, Mondego and Arade basins.
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