The Awali is supplemented by two tributaries, the Barouk and Aaray rivers. The Awali is also known as the Bisri river in its upper section; it flows through the western face of Mount Lebanon and into the Mediterranean. The Awali river has a discharge of , it forms a watershed that has an area of about . The rivers flows into Joun Lake, which is part of the Bisri Dam project to improve the supply of fresh water to the region.