The Wadi El Harrach is an Algerian river that originates in the Bliden, Atlas Mountains near Hammam Melouane. It is 67 kilometers long and flows into the Mediterranean, right in the middle of the bay of Algiers.Oued El Harrach crosses the Mitidja plain from Bougara and irrigates agricultural areas all around, thanks in particular to its tributaries and canals, Oued Djemâa, Oued Baba Ali, Oued El Terro and Wadi Semar which crosses an industrial zone Of the eastern suburbs of Algiers.