The study examined the morphometric aspects that influence peak flows and flood occurrence over the Larbaâ Wadi and its tributaries in Taza city. It emphasized the importance of understanding the physical parameters of the watershed to address flood problems. The study identified the factors determining flood discharges in urban areas. It reflected the natural features, speeding the water collection and leading to its accumulation downstream. The findings revealed that Larbaâ and Bouljraf basin shapes allowed for high flow rates, while Jaouna, Dfali, Rhouireg, and Taza decreased them. The concept of concentration time also demonstrated its role in flood evolution. It was the same time for the two principal Wadis, causing the flow to rise at the confluence point. The drainage and hydrographic densities highlighted the importance of flushing processes on impermeable marl lands. These findings could assist the city in identifying the factors contributing to rising floodwater volumes. They can guide the people in charge of dealing with hydrological threats. Similarly, the quality and accuracy of the results suggest that the method is a robust means of characterizing specific parameters that enhance the impact of flood risk.