A NEW MANAGEMENT APPROACH OF DAMS SILTATION
Journal Title: Larhyss Journal - Year 2017, Vol 31, Issue 31
Abstract
The present article examines in a first phase the current situation of the silting of Algerian dams based on the collection and analysis of data from about a hundred bathymetric surveys carried out by the National Agency of Dams and Transfers. A second phase proposes a methodology for managing the siltation of dams. The results show that, after 160 years of operation, siltation reached 1.7 billion m3 in the 74 dams with a capacity of 8.5 billion m3 of water. Either a loss of capacity of 20%. The siltation rate reached 65 million m3/year. Dams located in the Chéllif Zahrez watershed are the most threatened by siltation. In this study, we established a ranking of dams on the basis of the annual filling rate. Thus, we have identified 20 dams with a total capacity of 2370 million m3 are seriously threatened by mud deposits. Eight new dams of up to 14 years old are vulnerable to siltation. Twelve dams with a total capacity of 830 million m3 are moderately silted and 24 dams are slightly silted. In 2017, the volume of mud deposited in the 74 dams is estimated at 1.9 billion m3.
Authors and Affiliations
REMINI B. | Département des Sciences de l’Eau et de l’Environnement, Faculté de Technologie, Université Blida 1, Blida 9000, Algérie
Keywords
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