Arid and semi-arid areas are often subject to sudden and flash floods, causing extended damages to the population and infrastructures. This paper presents a method for flood assessment in the Zat watershed (sub basin of the Tensift catchment) via 10-minute numerical modeling using the HEC-HMS numerical model. To illustrate the calibration and the validation process four flood events recorded during (2011-2014) were used and two different validation methods were adopted. The comparative analysis of simulation results obtained during the calibration and validation showed a good compliance with measured data. A Nash-Sutcliff of 82.38% on average over the four events, and an R² of 0.65 are considered as satisfactory results for the correlation between the initial soil moisture conditions and the Curve Number. As part of the future steps, this approach could be extrapolated to other watersheds with similar contexts, both in Morocco and in other Mediterranean regions

干旱和半干旱地区经常遭受突如其来的洪水和山洪袭击，对人口和基础设施造成更大的破坏。本文通过使用HEC-HMS数值模型的10分钟数值模型，提出了Zat流域（Tensift流域子盆地）洪水评估的方法。为了说明校准和验证过程，使用了在（2011-2014年）期间记录的四个洪水事件，并采用了两种不同的验证方法。在校准和验证过程中获得的仿真结果的对比分析显示，与测量数据具有良好的一致性。四个事件的Nash-Sutcliff平均为82.38％，R ² 对于初始土壤湿度条件和曲线编号之间的相关性，0.65的结果被认为是令人满意的结果。作为未来步骤的一部分，可以将该方法推广到摩洛哥和其他地中海地区具有类似背景的其他流域