Revue des Sciences Fondamentales Appliquées
Volume 9, Numéro 2, Pages 1063-1073

Droughts In Semi-arid Cereal Regions Of Algeria

Auteurs : Smadhi D. . Zella L. . Bachir H. .


The droughts in the semi-arid Algeria’s cereal regions are evaluated by studying the average monthly rainfall, from September to June, over the period (1941-2011), based on the first-order Markov chain. This method traces rainy and dry days, cumulative rainfall and the probability of receiving rainfall above the thresholds of 0,1, 5, 10, 20 and 30 mm, in conjunction with the cereal development cycle. The rains analysed showed that the distribution of rainy days at the chosen thresholds did not exceed the variable averages of 6 to 9 days per month. These days are characterized by random cumulative rainfall, with probabilities fluctuating between + 40% and + 80%. Hard droughts affect seeding dates and yield factors for rainfed cereals.

Mots clés

Algeria, rainfall, Sowing, Markov Chain.

Problematic Soil Mechanics In The Algerian Arid And Semi-arid Regions: Case Of M’sila Expansive Clays

Khemissa Mohamed .  Mahamedi Abdelkrim .  Mekki Lakhdar . 
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Factors For Assessment Of Groundwater Vulnerability In Semi-arid And Arid Zones

Kerzabi R .  Mansour H .  Yousfi S .  Mudry J .  Benchaib A .  Bentoumi Ms . 
pages 187-203.

Les Coléoptères Des Pinèdes Des Zones Semi-arides En Algérie.beetles Pine Forests In Semi-arid Areas In Algeria

Mecheri Hadjer .  Ghanem Rym .  Adjami Yasmine .  Masna Fatiha .  Ouakid Mohamed Laid . 
pages 82-90.

Plants Of Algerian Semi-arid Regions Used For The Treatment Of Gastro-intestinal Disorders

Cheriti A. .  Belboukhari N. .  Sekkoum K. .  Hacini S. . 
pages 7-10.