Prédétermination des débits de crue par différentes méthodes. Cas du bassin versant d’El Kébir Ouest à Ain-Charchar (Nord-Est algérien)

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2017-01-29
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Synthèse: Revue des Sciences et de la Technologie
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Abstract To combat flooding, a long series of flow measurement is necessary, which is not the case unfortunately in most of the time.The interruption of the hydrometric station of Ain Charchar controlling the watershed of Oued El Kebir West Ain-Charchar on an area of 1130 km2 poses a serious data problem. To overcome this handicap, we used the values of maximum flows recorded over a period of 14 years, from 1985 to 1999, which fit well to the law of Gumbel. From the adjustment line, the probable flood values for different return periods were determined, 200 m3 / s for a return period of 10 years and 300 m3 / s for T equal to 100 years.To achieve our second objective, which is the possibility of reconstructing flood flows using empirical formulas based on precipitation, it has verified the correlation rain-flow rate by the Hydrolab software and the GR 1 model. The two methods have shown the existence of a simple linear relationship with correlation coefficients of 0.82 and 0.69, respectively. The two formulas for determining flood flows (formula of Turazza and that of Skolvoski) have led to similar results to those measured in the gauging station.
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