Sediment load estimation in the Mellegue catchment, Algeria

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Abstract

Soil erosion by water and the impact of sediment transport on lakes and streams, can seriously degrade soil and create problems for both agricultural land and water quality. The present study has been carried out to assess suspended sediment yield in Mellegue catchment, northeast of Algeria. Regression analysis was used to establish a relationship between the instantaneous water discharge (Q) and the instantaneous suspended sediment concentration (C) based on all recorded data and seasonal ratings for the period 1970–2003. The regression technique used in this paper involved a division of data into discharge – based classes, the mean concentrations and discharges of which are used to develop power regressions, according to single and season ratings, through log-transformation. Sediment loads estimated by stratified rating curves reduced underestimations to a range from 2 to 4%. The mean annual sediment yield during the 34 years of the study period was 589.23 t·km−2·y−1. Sediment transport is dominated by fall rainstorms accounting for 41% of the annual load. The big supply of sediment during this season confirms the intense geomorphic work by fall storms caused by high intensity rainfall and low vegetation cover.

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Journal of Water and Land Development

The Journal of Committee for Land Reclamation and Environmental Engineering in Agriculture of Polish Academy of Sciences and Institute of Technology and Life Sciences in Falenty

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CiteScore 2017: 1.04

SCImago Journal Rank (SJR) 2017: 0.304
Source Normalized Impact per Paper (SNIP) 2017: 1.024

Ministry of Science and Higher Education: 14 points

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