Variability of surface water resources and extreme flows under climate change conditions in arid and mediterranean area: Case of Tensift watershed, Morocco | JBES

JBES Climate change, 19,12,2018By: Mohamed El Mehdi Saidi


Within the context of climate change and increasing demographic pressures, problems of water resources variability have become particularly crucial. The management of arid watersheds, which are highly exposed to droughts and floods, needs to be supported by a thorough understanding of their susceptibility to these hazards. The watershed of Tensift in Morocco includes a high mountainous area and a large alluvial plain. In the mountainous part, the bedrock has a low permeability and steep slopes, while the main valleys are narrow and deep. The important rainfall events, which are usually short but intense, are favoured by high elevation and good exposure to oceanic disturbances. Furthermore, predictions of climate change consequences on several socio-economical fields in Morocco are very alarming. For example, climate trends and future climate projections at Marrakech show a clear trend towards higher temperatures and lower rainfall. Consequently, surface water resources are directly affected and the flows of Tensift river have fallen significantly. JBES Climate change 19,12,2018For the extreme events, the conjunction of physical and climatological factors in the mountainous basins, is at the origin of violent floods, which are characterized by the highest velocities and peak flows. The frequency analysis of floods shows that these extreme events are repetitive with a variable intensity. The rising time of floods is very short, and human and material damages can often be substantial. plain’s floods are slower, but their water volumes are very important and can submerge wide areas around the rivers as the case of the flooding of November 30, 2014.

Author Information:

Oumaima Bennani, Yassine Ait Brahim, Mohamed El Mehdi Saidi, Fatima Fniguire

Laboratory of Geosci. & Environ. & LMI TREMA, Cadi Ayyad University, Marrakech, Morocco

Laboratory of Applied Geology and Geo-Environment, Ibn Zohr University, Agadir, Morocco

Laboratory GEOHYD, Cadi Ayyad University, Faculty of Sciences, Marrakech, Morocco

Key words: Tensift watershed, Climate change, Discharge variability, Floods.

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Published By: International Network for Natural Sciences


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Journal of Biodiversity and Environmental Sciences-JBES is an open-access scholarly research journal, published by International Network for Natural Sciences-INNSPUB. JBES published original scientific articles in different field of Environmental Sciences and Biodiversity. JBES published 2 Volume and 12 issue per calendar year.


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