The global community has been pushed by several recent large-scale climate events to take an interest in climate change and its effects on water supplies. Among them, we can cite the droughts that have affected the Maghreb countries , particularly since the 1970s in Algeria. This study takes advantage of some statistical methods to interpret the spatiotemporal variability of precipitation for a period of 19 to 38 years at 16 rainfall stations located in the Medjerda (North East of Algeria) watershed. In the span of 1980 and 1990, there was an observed break when evaluating such sequence. Accordingly , the results of the mapping of the interannual rainfall indices calculated per decade over the period 1971-2007 show that the 80th and 90th decades appear to be a deficit across the basin. For the period (2001-2007), a trend towards a return of precipitation is thus noted. On the monthly scale, after years of failure for the winter months and spring, precipitation increased dramatically, Along with the The March Exception. An extraordinary concentration of rainfall in the month of August is observed. At the The study of daily rainfall fractions on a daily basis indicates a pattern in the rise in the average After years of failure, the average annual rainfall is greater than 20 mm. The Medjerda basin is also considered to have a Reduced precipitation and temperature rise over a period from (1913-1938) to (1969-1969) It’s 2007).

Author (s) Details

Dr. Wacila Khoualdia
Laboratoire de Gestion, Maintenance et Réhabilitation des Equipements et des Infrastructures Urbaines Université Mohamed

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