Impact du changement climatique sur la fluctuation piézométrique de la nappe de la Mitidja

Abstract

The aquifer of Mitidja has known a relative decrease in its piezometer level during the last decade because of the influences of the rapid increase in the population and their needs for water and the effect of climate change. This situation represents a strong constrains for the sensitive groundwater in the plain. The aim of this study is to highlight the existence of climate change, manifested primarily by variability in the amount of rainfall and irregularities in the plain studied, and highlight its impact on food of groundwater reserves, in the surface water table. To do this, we used various data (rainfall and piezometry) and methods (the Standardized Precipitation Index (SPI), homogeneity test and cumulative rainfall, Statics Buishand, test Pettit, Bayesian method Lee and Heghinian and procedure Hubert segmentation).The results indicate the existence of a break in 2001 manifested by change in rainfall patterns. The symptoms of this climate change effects groundwater resources.