 The upper Litani River, where the artificial lake or reservoir has been created with the dam at elevation of about , is in the inland region of the Beqaa Valley, whose elevation range generally lies between , with mountain peaks raising as high as .The Litani River drains the southern end of the Beqaa Valley plains (a continuation of the Jordan Rift Valley), crossing the southern periphery of the Mount Lebanon range and discharging into the sea north of Tyre, after traversing a length of entirely in Lebanon.The hydrographical system of Lebanon consisting of 40 major streams is typecast into five regions, which includes the Litani River Basin formed by the Litani River in its eastern and southern part, with the river debouching into the sea at the southwestern end.