1. Research Laboratory in Subterranean and Surface Hydraulics -LARHYSS; University of Biskra; Po Box No 145 BISKRA 07000 RP Algeria
2. Chair in Statistical Hydrology INRS-ETE, 490 rue de la Couronne; Québec G1K 9A9 Canada
3. Applied Mathematics Laboratory -LMA; University of Biskra; Po Box No 145 BISKRA 07000 RP Algeria