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<p>This study investigates flood events in the Oued Lahdar Watershed, with particular emphasis on the Bni Ftah Center, in the Upper Inaouène region of Morocco. Floods, exacerbated by rapid urbanization and sometimes insufficient infrastructure, remain a serious threat to local communities and infrastructure. The primary objective is to apply a hydrological approach, coupled with modeling, to estimate peak discharges and identify critical flooding areas. The findings show that peak flows increase linearly with sub-basin area. Over a 100-year return period, peak flows are 434&#xa0;m³/s for Oued Lema and 218&#xa0;m³/s for Oued Bni Ftah. Ten-year floods primarily affect low-lying areas near river channels, while centennial and millennial floods pose severe threats to the alluvial plain, endangering essential facilities, including Jabir Ibn Hayyan Middle School, the weekly souk, and residential areas. The analysis also points to deficiencies in the current infrastructure, such as aging bridges and retaining walls, that exacerbate vulnerability to flooding. This research helps understand hydrological dynamics and serves as a preliminary step toward developing robust flood risk management initiatives in an otherwise vulnerable region, particularly in the context of climate change and growing urban sprawl.</p>

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Hydrological analysis and hydraulic modeling of floods: insights from Oued Lahdar (Upper Inaouène, Morocco)

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Hamid Fattasse,
  • Marouane Laaraj,
  • Kamal Lahrichi,
  • Abdelmonaim Okacha

摘要

This study investigates flood events in the Oued Lahdar Watershed, with particular emphasis on the Bni Ftah Center, in the Upper Inaouène region of Morocco. Floods, exacerbated by rapid urbanization and sometimes insufficient infrastructure, remain a serious threat to local communities and infrastructure. The primary objective is to apply a hydrological approach, coupled with modeling, to estimate peak discharges and identify critical flooding areas. The findings show that peak flows increase linearly with sub-basin area. Over a 100-year return period, peak flows are 434 m³/s for Oued Lema and 218 m³/s for Oued Bni Ftah. Ten-year floods primarily affect low-lying areas near river channels, while centennial and millennial floods pose severe threats to the alluvial plain, endangering essential facilities, including Jabir Ibn Hayyan Middle School, the weekly souk, and residential areas. The analysis also points to deficiencies in the current infrastructure, such as aging bridges and retaining walls, that exacerbate vulnerability to flooding. This research helps understand hydrological dynamics and serves as a preliminary step toward developing robust flood risk management initiatives in an otherwise vulnerable region, particularly in the context of climate change and growing urban sprawl.