Pluviometric Regime Evolution in the North of Algeria PDF

Keywords

Rainfall patterns, drought, Statistical test, North of Algeria

Abstract

Western Algeria has been experiencing drought since the middle of 1970's. which is characterized by severity and a remarkable persistent of rainfall deficit. The effects of this drought are also felt in the extreme east. The aim of this study is to identify the variations of climate in order to predict and analyze their impact on water resources in future work. The selected study area includes 15 basins of the North of Algeria Rainfall data from 86 precipitation stations with low percentages of missing data were used in this study. All of these stations' data have been utilized at least over the period 1930-1999/2000, on which the study focused. To explore rainfall variability, long series of rainfall on annual, seasonal, and monthly scales were subjected to statistical tests for detecting breaks in those series. Statiscal methods used are U Buishand, the non-parametric test of Pettitt, the procedure of Bayesian Lee and Heghinian and the procedure of segmentation of Pierre Hubert The univariate analysis showed a change in the rainfall pattern in the western region since 1975. However, in east of Algeria, no break was detected by the application of these methods.