Author:
Djoukbala Omar,Hasbaia Mahmoud,Benselama Oussama,Hamouda Boutaghane,Djerbouai Salim,Ferhati Ahmed
Abstract
AbstractThis study aims to estimate the eroded and transported sediment yields from the The Hodna basin (26,000 km2) situated in central Algeria by two approaches. In the first model, the data of the gauged subbasins are extrapolated to the ungauged areas based on the homogeneity of factors that influence the water erosion-sediment transport process. In this approach, the specific eroded and transported sediment yield in the Hodna basin is estimated to be 425 t/km2/yr. In an alternative approach, the eroded yield is estimated by mapping erosion using the (RUSLE) in a GIS environment. The obtained results show a high eroded sediment yield of approximately 610 t/km2/yr.The observed difference between the results of the two approaches can be explained by the amount of sediment that is eroded but is not transported by runoff.These two methods show high eroded and transported sediment yield values in the Hodna basin region; these high yields may seriously threaten the central flat zone with progressive deposition.
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