Wadi al-Abyad
Wadi al-Abyad or al-Ubayyid (Arabic: وادي الأبيض, "white wadi") is the second-longest wadi in Iraq (after Wadi Hauran) and extends in west of Iraq within Al Anbar Governorate and Karbala Governorate. It runs for roughly 250 kilometres (160 mi), from Iraqi-Saudi border (near Arar) in Al Anbar Governorate till Lake Razazah in west of Karbala Governorate.