Ghaggar-Hakra River - Ancient Tributaries

Ancient Tributaries

Satellite photography has shown that the Ghaggar-Hakra was indeed a large river that dried up several times (see Mughal 1997). The dried out Hakra river bed is between three and ten kilometers wide. Recent research indicates that the Sutlej and possibly also the Yamuna once flowed into the Ghaggar-Hakra river bed. The Sutlej and Yamuna Rivers have changed their courses several times.

Paleobotanical information also documents the aridity that developed after the drying up of the river. (Gadgil and Thapar 1990 and references therein). The disappearance of the river may additionally have been caused by earthquakes which may have led to the redirection of its tributaries. It has also been suggested that the loss of rainfall in much of its catchment area as well as deforestation and overgrazing may have also contributed to the drying up of the river. However, a similar phenomenon, caused by climate change, is also seen at about the same period north of the Hindu Kush, in the area of the Bactria-Margiana Archaeological Complex.