Hydrograph Flood Forecasting in the Catchment of the Middle Cheliff
The impact of climate changes on flood peaks was the subject of several studies. However, a flood is not characterized only by its peak but also by the time, duration of the tip, as well as the rise time and shape of the flood hydrograph according to geog
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Contents 1 Introduction 2 Material and Methodology 3 Results 4 Discussions 5 Conclusions 6 Recommendations References
Abstract The impact of climate changes on flood peaks was the subject of several studies. However, a flood is not characterized only by its peak but also by the time, duration of the tip, as well as the rise time and shape of the flood hydrograph according to geographical distribution, leading to an understanding of these extreme hydrological hydrographs and to detect areas vulnerable to flood hazards. The floodduration-frequency observed rate of chronic Q(t) provides a theoretical multi-term flood quantiles description, directly meeting the needs of an integrated hydrological hydraulic modeling of the catchment. This article describes a statistical approach that aims to characterize the river in flood hydrology taking into account the notion of duration “d” and the return period “T.” We realize that samplings were carried out for flood flows of 04 gauging stations in the watershed of the middle Cheliff, which reveal a higher value than the threshold. For this analysis, F-d-F was requested to define synthetic mono-frequency hydrographs (SMFH).
M. Renima (*) and M. Remaoun Laboratory of Chemistry Vegetable-Water-Energy, University of Chlef, Chlef, Algeria e-mail: [email protected] A. Boucefiane, A. Sadeuk Ben Abbes, and A. Bouderbala Department of Earth Sciences, University of Khemis Miliana, Khemis Miliana, Algeria Abdelazim Negm, Abdelkader Bouderbala, Haroun Chenchouni, and Damia Barcelo (eds.), Water Resources in Algeria: Part II: Water Quality, Treatment, Protection and Development, Hdb Env Chem, DOI 10.1007/698_2020_539, © Springer Nature Switzerland AG 2020
M. Renima et al.
Keywords Algeria, Floods, Flood-duration-frequency, Hydrographs, Middle Cheliff, Peaks-over-threshold, SMFH
1 Introduction Among the Mediterranean countries, Algeria is the most vulnerable to floods caused by streams overflowing crossing towns and suburban. The sudden onset floods are often difficult to predict, rapid rise time and specific flow relatively important, these floods are generally linked to intense rainy episodes and are manifesting on middle size basins. Several catastrophes caused by those floods have been inventoried in Algeria (Algiers in November 2001, Sidi Bel Abbès in April 2007, Ghardaia and Bechar in October 2008, etc.) Although some studies had to be devoted to F-d-F models, this approach remains not much used. The F-d-F models began to be developed in the year 1990 in France [1, 2]; the floods modeling by F-d-F models among other have been applied in France to a watershed regionalization flood. Furthermore, a converging and continuous F-d-F model has been proposed by Javelle et al. [3]. It is based on properties of flood distribution scale invariance. Applied in Martinique, by Meunier [4], this model has also been combined to flood index method [5] by [6, 7] bringing some improvements to the estimation procedure and applying this corrected model version for spring floods to Quebec provinces and in Ontario (Canada)
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