The Ghaggar-Hakra River is an intermittent river in India and Pakistan that flows only during the monsoon season. The river is known as Ghaggar before the Ottu barrage and as the Hakra downstream of the barrage. The Ghaggar-Hakra is generally identified with the Vedic Sarasvati River by most scholars, though it is disputed whether all Rigvedic references to the Sarasvati should be taken to refer to this river. The identification of the Vedic Sarasvati River with the Ghaggar-Hakra River was accepted by Christian Lassen, Max Müller, Marc Aurel Stein, C.F. Oldham, and Jane Macintosh.