Current view: Text account
Site description (2001 baseline):
Site location and context
The site is the second-largest man-made reservoir in Morocco, on the Oued Oum Er-Ribi’a, located approximately 50 km south of Settat. Lying at an altitude of 265 m, the reservoir is around 30 km long, has a surface area of 14,000 ha, and a maximum depth of 60 m. Situated in a hilly valley, the reservoir’s border is heavily indented and there are many islets, some of which only emerge when the water-level is low. The reservoir’s shores are mainly rocky, and are partly wooded with
Eucalyptus and
Acacia species. Aquatic plants such as algae and
Potamogeton grow in profusion along a 10–50-m-wide strip around the reservoir’s edge. When the water-level drops, exposed mudbanks and the drying aquatic plants provide extensive feeding habitat for waterbirds. Average annual precipitation is 200 mm.
See Box for key species. The Barrage al Massira regularly harbours large numbers of wintering waders and waterfowl: 42,000 birds were counted in January 1993 and 55,000 in January 1995, of more than 30 different species.
Marmaronetta angustirostris is a regular wintering visitor; 1,973 were recorded in January 1993 and 280 in January 1995. In addition to those listed below, maxima of 7,000
Anas penelope, 4,000
Aythya ferina and 20,000
Fulica atra have been noted. Around 20 waterbird species are summer/breeding visitors, mainly breeding on the islets in the reservoir. It is suspected that
Fulica cristata may also approach threshold levels, but no data are available.
Non-bird biodiversity: None known to BirdLife International
Pressure/threats to key biodiversity
The reservoir is a priority 1 SIBE (No. H29). It is public land, administered by AEFCS and the Service des Travaux Publics. There is a small commercial fishery, and the reservoir and its shores are also used by sport-fishermen and livestock. The main threat is disturbance of nesting birds: on the islets, principally by fishermen; around the borders of the reservoir by grazing flocks of sheep. The site merits inclusion on the list of Moroccan Ramsar Sites, and requires the implementation of an appropriate management plan.
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Barrage al Massira (Morocco). Downloaded from
https://datazone.birdlife.org/site/factsheet/barrage-al-massira-iba-morocco on 23/12/2024.
