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Contribution of remote sensing and GIS to analysis of the risk of flooding in the Zat basin (High Atlas-Morocco)

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Abstract

During the last years, the flood phenomenon has spread in the world due to climatic conditions and changes in land use. The Zat basin is a sub-basin of the Tensift River and one of the areas affected by this natural hazard. This paper puts forward on the mapping and modelling of the flood increase process at the level of the Zat watershed. The main objective of this work is to contribute to flood risk management in this basin. First, factors causing the flood such as the slope, lithology, and density of vegetation cover were identified using advanced geomatics technology (Geographic Information System and remote sensing). Moreover, Rainfall data for the period of 1968–2016 were analysed to illustrate the trend in precipitation at the watershed level. Results showed that the geomorphological and rainfall context of the basin is making it a vulnerable area to the onset of torrential floods. The rainfall analysis demonstrated that the Zat watershed has a trend towards drought along with extreme events such as floods.

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Acknowledgement

The authors would like to gratefully acknowledge the Department of Geology faculty of sciences Semlalia and the Geosciences Laboratory for facilitating field missions and offering favourable conditions for scientific research. We are also grateful to Regional Directorate of Water and Forests and Desertification Control of Marrakech, Morocco (DREFLCD), and the Regional Office for the Agricultural Development of Haouz (ORMVAH) of Marrakech, for their welcome and for providing us with the rainfall data.

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Authors and Affiliations

  1. Geosciences Semlalia Laboratory, Geology Department, Faculty of Sciences Semlalia, Cadi Ayyad University, Marrakech, Morocco

    Jihad Bouaida, Omar Witam, Mounsif Ibnoussina & Myriam Benkirane

  2. Regional Directorate of Water and Forests and Desertification Control, Marrakech, Morocco

    Abd El Fettah Delmaki

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  1. Jihad Bouaida
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  2. Omar Witam
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  3. Mounsif Ibnoussina
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  4. Abd El Fettah Delmaki
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  5. Myriam Benkirane
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Correspondence to Jihad Bouaida.

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Bouaida, J., Witam, O., Ibnoussina, M. et al. Contribution of remote sensing and GIS to analysis of the risk of flooding in the Zat basin (High Atlas-Morocco). Nat Hazards 108, 1835–1851 (2021). https://doi.org/10.1007/s11069-021-04758-x

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