 During the wet season, rain and melting snow flow into the valley to form the Abiod River.The valley begins at the foot of Djebel Chélia, Algeria's highest mountain, and flows southwest towards Tolga, eventually dissipating into the Sahara desert nearby.The vegetation in the highlands on the north end of Abiod Valley is typically Mediterranean with dense forests of oaks, pines and ancient cedars, sustained by the plentiful rainfall on the higher slopes.