Al Massira Dam

Al Massira Dam
Al Massira Dam is located in Morocco
Al Massira Dam
Location of Al Massira Dam in Morocco
Official nameBarrage Al Massira
CountryMorocco
LocationSettat
Coordinates32°28′31″N 07°38′15″W / 32.47528°N 7.63750°W / 32.47528; -7.63750
StatusOperational
Opening date1979
Owner(s)Office National de L'Electricite (ONE)
Dam and spillways
Type of damGravity
ImpoundsOum Er-Rbia River
Height82 m (269 ft)
Length390 m (1,280 ft)
Dam volume354,000 m3 (12,500,000 cu ft)
Reservoir
Total capacity2,760×10^6 m3 (2,240,000 acre⋅ft)
Catchment area28,500 km2 (11,000 sq mi)
Surface area80 km2 (31 sq mi)
Power Station
Commission date1980
Turbines2 x 64 MW (86,000 hp) Francis-type
Installed capacity128 MW (172,000 hp)[1]
Annual generation221 GWh (800 TJ)
Official nameBarrage Al Massira
Designated15 January 2005
Reference no.1471[2]

The Al Massira Dam is a gravity dam located 70 kilometres (43 mi) south of Settat on the Oum Er-Rbia River in Settat Province, Morocco. Completed in 1979, the dam provides water for the irrigation of over 100,000 hectares (250,000 acres) of farmland in the Doukkala region. The dam's hydroelectric power plant also generates 221 gigawatt-hours (800 TJ) on average annually. The power station was commissioned in 1980. Just north of the dam is a rip rap saddle dam that supports water elevation in the reservoir.[3]

Environment

The dam's reservoir and wetlands were designated as a Ramsar site in 2005.[4] The wetlands have also been designated an Important Bird Area (IBA) by BirdLife International because they support significant populations of wintering waterbirds, including ruddy shelducks, marbled teals, northern shovelers and gull-billed terns.[5]

In 2024 analysis of satellite images of the dam by the BBC revealed the volume of water was 3% of the amount present nine years previously. The country had suffered from six consecutive years of drought. The Moroccan water ministry told the BBC that use of the dam's water for irrigating farmland had been suspended since 2021, the water being reserved for supplying cities such as Casablanca and Marrakesh. Many of the springs in the Middle Atlas mountains, which feed the reservoir, had dried-up. Reduced snowfall at higher altitude had also contributed to less meltwater flowing into the streams feeding the dam. In August 2023 Morocco recorded a record highest-ever temperature of 50.4C which caused an increase in evaporation, adding to a reduction in water's level.[6]

See also

References

  1. ^ "Al Massira Hydroelectric Power Project Morocco". Global Energy Observatory. Retrieved 23 August 2011.
  2. ^ "Barrage Al Massira". Ramsar Sites Information Service. Retrieved 25 April 2018.
  3. ^ "Al Massira" (in French). Secretariat D'etat Charge de L'eau et de L'environnement. Archived from the original on 9 October 2011. Retrieved 23 August 2011.
  4. ^ "Morocco names 20 varied new Ramsar sites". The Ramsar Convention on Wetlands. 26 June 2005. Retrieved 23 August 2011.
  5. ^ "Barrage al Massira". BirdLife Data Zone. BirdLife International. 2024. Retrieved 2024-10-23.
  6. ^ "Morocco drought: Satellite images show vital Al Massira reservoir is shrinking". BBC News. 10 April 2024. Archived from the original on 10 April 2024. Retrieved 10 April 2024.


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