Journal metrics

Journal metrics

  • CiteScore value: indexed CiteScore
    indexed
  • SNIP value: indexed SNIP
    indexed
  • SJR value: indexed SJR
    indexed
  • IPP value: indexed IPP
    indexed
Volume 377
Proc. IAHS, 377, 35-40, 2018
https://doi.org/10.5194/piahs-377-35-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.
Proc. IAHS, 377, 35-40, 2018
https://doi.org/10.5194/piahs-377-35-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 3.0 License.

  16 Apr 2018

16 Apr 2018

Estimation of sediment deposits in the Ghézala reservoir in northern Tunisia

Majid Mathlouthi1 and Fethi Lebdi2 Majid Mathlouthi and Fethi Lebdi
  • 1Research Laboratory in Sciences and Technology of Water at National Agronomic Institute of Tunisia, 43 avenue Charles Nicolle, 1082 Tunis, Tunisia
  • 2National Agronomic Institute of Tunisia, 43 avenue Charles Nicolle, University of Carthage, 1082 Tunis, Tunisia

Abstract. The control of sedimentation in a reservoir provides a global evaluation of the process of erosion and transportation of sediment. Knowledge of sedimentation is useful for reservoir management. Bathymetric surveys can be used to assess the silting volume of dams. The results of two surveys of the Ghézala dam reservoir in northern Tunisia are available. The measurements provide initial information about the quantity and variability of silting and the mechanism of sediment deposition. According to the results of measurements, the average annual specific sediment yield of the Ghézala dam watershed is estimated at 1851t km−2 yr−1. The annual average sediment volume trapped varies from 23000m3 in 1993 to 66692m3 in 2011. The sedimentation rates increases from 0.20 to 0.57% overtime. The results indicate interdependence between the specific erosion rates and the occurrence of soils on steep slopes. The pressure exerted on the soil by plowing as well as overgrazing to meet the needs of the population of this area has exposed the soil to continued deterioration manifested by increased erosion endangering the only source of revenue for the area.

Publications Copernicus
Download
Short summary
The control of sedimentation in a reservoir provides a global evaluation of the process of erosion and transportation of sediment. Knowledge of sedimentation is useful for reservoir management. Bathymetric surveys can be used to assess the silting volume of dams. The results of two surveys of the Ghézala dam reservoir in northern Tunisia are available. The measurements provide initial information about the quantity and variability of silting and the mechanism of sediment deposition.
The control of sedimentation in a reservoir provides a global evaluation of the process of...
Citation
Share