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Topographic and morphometric analysis of Sebou watershed (Morocco) using geographic information system and digital elevation model

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Author Affiliations

  • 1Department of geography, Faculty of Letters and Human Sciences, University Moulay Ismail, Meknés, Morocco
  • 2Department of geography, Faculty of Letters and Human Sciences, University Moulay Ismail, Meknés, Morocco

Int. Res. J. Earth Sci., Volume 6, Issue (2), Pages 1-10, February,25 (2018)

Abstract

The Sebou watershed, object of this study, is considered one of the most important basins in Morroco due to its high agricultural and industrial activities and water resources. The topographic and morphometric characteristics have been derived from digital elevation model using geographic information system. The study reveals that the majority area of the basin presents low slope and is directed towards NW. The watershed has 5 orders of stream. The number of stream segments is 400, dominated by 1st order streams (53.3%). The stream number and the stream length decrease while stream order increase. The mean bifurcation ratio is 4 in which the influence of geologic structures is negligible. The drainage density and frequency are low and drainage texture is very coarse. Form factor and elongated ratio indicates that the basin is close to oval shape. The stream gradient is high in first order and low in fifth orders. The hypsometric analysis indicates an old stage.

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