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Proceedings of the International Association of Hydrological Sciences An open-access publication for refereed proceedings in hydrology
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Volume 364
Proc. IAHS, 364, 123–127, 2014
https://doi.org/10.5194/piahs-364-123-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Proc. IAHS, 364, 123–127, 2014
https://doi.org/10.5194/piahs-364-123-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

  16 Sep 2014

16 Sep 2014

Modelling approach for the rainfall erosivity index in sub-humid urban areas in northern Algeria

I. Touaibia1, N. Abderrahmane Guenim1, and B. Touaibia2 I. Touaibia et al.
  • 1Dept. d'Hydraulique. University, Abou Bakr Bel Kaid Tlemcen, Algeria
  • 2Ecole Nationale Supérieure d'Hydraulique, Blida, MVRE, Algeria

Keywords: Statistical models, specific erosion, sub-humid climate, urban hydrology, USLE

Abstract. This work presents an approach for storm water erosivity index modelling in the absence of measurement in an urban area, in a sub-humid climate. In torrential storms, floods, loaded with sediments, obstruct storm water drainage. With the aim of estimating the amount of sediment that can be deposited on a stretch of road, adjacent to the study area, the erosivity index is determined from a count of 744 rain showers recorded over a period of 19 years. The Universal Soil Loss Equation (USLE) of Wischmeier and Smith is applied, where only the index of erosivity is calculated; it is based on the intensity of the rain starting the process of erosion in the basin. Functional relations are required between this factor and the explanatory variables. A power type regression model is reached, making it possible to bring a decision-making aid in absences of measurements.

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