LE BARRAGE RESERVOIR DE GARGAR EST- IL MENACE PAR L’ENVASEMENT ?

Abstract

The dam reservoir Gargar is a large-scale hydraulic works commissioned in 1989 with an initial capacity of 450 million m³. It is intended for irrigation and drinking water supply. Based on its first bathymetric survey conducted in 2004 by the National Agency of Dams and Transfers, the dam is cut with a volume of 92 million m³ in 15 years of operation following an accelerated siltation. An annual filling speed equal to 1.4% / year, a significantly superior value than we estimated in 2000. Estimated at 27% filling rate of the reservoir in 2014, the dam Gargar will be abandoned in 2060 if desilting provisions will not be taken in the short and medium term.