الخلاصة:
The  study  of  weather  changes  of  the  most  important  factors  that  help  the  good  and  rational 
management of water resources. This work is studying a series of loss for rain gutter area in a specific 
period, and how it impacted on the region of M’Zab. From 1970 to 2014, which is the length of which 
was extracted precipitation series. The application of a set of statistical operations and revisionism, 
we extracted the large climate changes that touched the area of dry periods. 
In addition, a large set of data in this work made us know well on climate change and periods 
experienced by the region in the period this topic.