Wadi Debayan (Arabic: وادي الضبيعان, romanized: Wādī aḑ Ḑubay‘ān) is the oldest Neolithic archaeological site in Qatar.
[3] Although the site is approximately 4 km inland, ancient marine sediments demonstrate that it was situated along the coast during its periods of habitation.
[6] Wadi Debayan was excavated by a team from the University of Birmingham as part of the Qatar Remote Sensing and National Historic Environment Record Project between 2009 and 2014 under the direction of Dr. Richard Cuttler.
Tools consistent with the Arabian bifacial tradition were discovered in the forms of knives and arrowheads and are dated from 6000 to 3500 BC.
The uppermost layers of the beach ridge are indicative of a high energy event or possible tsunami that coincide with a hiatus in prehistoric occupation around the middle of the 3rd millennium BC.