Long-term seasonal characterization and evolution of extreme drought and flooding variability in northwest Algeria

• Autorzy: Sofiane Kouidri , Abdesselam Megnounif , Nekkache Ghenim Abderrahmane

Identyfikatory

DOI

10.26491/mhwm/106101

• Języki publikacji: EN

Abstrakty

EN

A three decade-long study on the variability of drought in relation to the contribution of rainfall was conducted at the Wadi Mekerra watershed, located in northwest Algeria, covering the period from 1973 to 2005. The runoff and rainfall data were analyzed using the Mann-Kendall test, the double mass curve method and the SPI index. A rupture of the studied series appeared during the 1980s. The rainfall and runoff trends and contributions were in general, sharply reduced. The region experienced extreme drought between 1981 and1989, and between 1993 and 2001, rainfall contributions were greater than 60%. This increase, which was recorded in August, September and October for all the parameters studied, shows the importance of the superficial runoff component when combined with decreased infiltration. These climatic conditions reduce the natural recharging of groundwater, and cause an increased susceptibility to soil erosion, reduced agricultural production and an increased risk of floods.

Słowa kluczowe

EN

runoff; trend; contribution; drought

• Wydawca: Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy
• Czasopismo: Meteorology Hydrology and Water Management. Research and Operational Applications
• Rocznik: 2019
• Tom: Vol. 7, Iss. 2
• Strony: 63--71
• Opis fizyczny: Bibliogr. 36 poz., rys., tab.

Twórcy

autor

Sofiane Kouidri

• EOLE Laboratory, Tlemcen University, Tlemcen 13000, Algeria

autor

Abdesselam Megnounif

• EOLE Laboratory, Tlemcen University, Tlemcen 13000, Algeria

autor

Nekkache Ghenim Abderrahmane

• EOLE Laboratory, Tlemcen University, Tlemcen 13000, Algeria

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