Contribution à la modélisation des courbes de Tarage (cas de bassin versant côtier Algérois.

Abstract

The objective of this study is to develop effective models for estimating the discharge, of the flows in the rivers of the Algerian Coastal basin, where an accentuated space-time variability of the liquid flows is observed. The work aims to define all the parameters, geomorphologic, geologic, hydrological and climatically of the Algerian Coastal under basins, followed by a quantitative and qualitative analysis of the liquid discharge and wetted cross section, liquid discharge and stage measured on the level of the hydrometric stations. This has allowed to the identification of "discharge-cross section" and "discharge-stage" models for the extrapolation of the great discharges in the absence of gauging for the rivers of the Algerian coastal basin. The application of the entropy method leads quickly to the floods discharges estimation, without doing a full gauging. Taking into account the loose density of the gauging network in the Algerian Coastal basin, a methodological approach is developed to estimate the rating curve according to the perspective of the watershed characteristics. It is based on the linear multiple regression and the artificial neural network concept .