Spatial distribution of the daily precipitation concentration index in Algeria
- 1National Climate Centre at the National Meteorological Office, Av. Khemisti B.P. 153, Dar el Beïda, Algiers, Algeria
- 2Climatology Group, University of Barcelona, C/Montalegre 6, 08001 Barcelona, Spain
- 3Department of Geography, UNESP Ourinhos, Av. Vitalina Marcusso, 1500 São Paulo, Brazil
Abstract. In this paper, the spatial and temporal distribution of the daily precipitation concentration index (CI) in Algeria (south Mediterranean Sea) has been assessed. CI is an index related to the rainfall intensity and erosive capacity; therefore, this index is of great interest for studies on torrential rainfall and floods. Forty-two daily rainfall series based on high-quality and fairly regular rainfall records for the period from 1970 to 2008 were used. The daily precipitation CI results allowed the identification of three climate zones: the northern country, characterized by coastal regions with CI values between 0.59 and 0.63; the highlands, with values between 0.57 and 0.62, except for the region of Biskra (CI = 0.70); and the southern region of the country, with high rainfall concentrations with values between 0.62 and 0.69.