Résumé:
Over the last decade, the rainfall of climate change has been recognized as one of the major development problems at local, regional and even international levels, alongside sustainable development, conservation and Environmental protection. In order to elucidate this problem, it is essential to analyze the precipitation term. An attempt has been made to address some of the most troubling and fundamental questions, including: How do we assess the rainfall of our region in space? Is there a decrease in precipitation over the last decade? From this perspective, we studied rainfall using statistical treatment and analysis of drought indices. The calculation of the indices for the different stations reveals the existence of two distinct wet and dry periods. The years of drought are remarkable because they can settle for 4 years. There is a decrease in rainfall during this study period but is also interrupted by other years of high rainfall in some areas such as Chlef and Mostaganem. It is as if, the more one goes west the more the drought impact is present.
