Etude de l'évolution temporelle des intensités des pluies au centre et l'Ouest Algérie.

Abstract

Algeria's northwest experienced devastating floods in recent decades due to shortlived, high-intensity showers.Relevant to this study presents a contribution to the development of a working and planning methodology for risk prediction through the use of

climate modeling.

Our main objective is the modeling of rainfall intensity for the northwestern region of

Algeria in order to study the trend of extreme values

In this work the quintiles were calculated from the data of the maximum intensities for

different durations. The adjustment of the maximum intensity series to calculate the quintiles

for the return periods (2, 5, 10, 20, 50, 100 and 200 years) and for different durations (5, 10, 15,20,30,45, 60, 120, 180, 240 and 360 minutes) was made with the HYFRAN-Plus software,

The results of the frequency analysis show that the series of maximum intensities adjust well

the law GEV. The interpretation of the results allowed locating the areas vulnerable to the risk

of flooding in the study area.