| Popis: |
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 flood-duration-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). |
