Hydrological flood modeling and risk flooding evaluation methodology: Case of the Oued Mina catchment in the Wilaya of Relizane (North- West of Algeria)
Abstract
Flood risk is composed into hazard and vulnerability. Hazard requires the study of the flood regime by the flood modelling, the aim of this study is to use the two characteristics well, hydrological characteristics are very important to know, the quantile of 10 years of instantaneous maxima annual flood flow estimated by Pearson III distribution is equal to 634.60 m3/s, and the duration of the characteristic flood in the catchment (D=10 hours).Those indices conduct to obtain all the mathematical Flowduration-Frequency (QdF) models and the synthetic flood hydrographs whose considered as the hydrological flood modelling. The obtained result for a specific return period conduct to the hazard as a first component of the risk and using those model with a certain methodology to determine the vulnerability as the second component of the risk and for mapping areas at risk of flooding. Flood risk is composed into hazard and vulnerability. Hazard requires the study of the flood regime by the flood modelling, the aim of this study is to use the two characteristics well, hydrological characteristics are very important to know, the quantile of 10 years of instantaneous maxima annual flood flow estimated by Pearson III distribution is equal to 634.60 m3/s, and the duration of the characteristic flood in the catchment (D=10 hours).Those indices conduct to obtain all the mathematical Flowduration-Frequency (QdF) models and the synthetic flood hydrographs whose considered as the hydrological flood modelling. The obtained result for a specific return period conduct to the hazard as a first component of the risk and using those model with a certain methodology to determine the vulnerability as the second component of the risk and for mapping areas at risk of flooding.
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Copyright (c) 2024 Aichoune Merzaka, Yahiaoui Abdelhalim

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