Chambal is the chief tributary of the Yamuna river. It joins the Yamuna near Etawah in Uttar Pradesh and is known for its deep ravines and historical association with dacoits. The Chambal River flows through Madhya Pradesh, Rajasthan, and Uttar Pradesh. Narmada is a west-flowing river, Ganga has its own tributary system including Yamuna, and Krishna is a peninsular river flowing eastward.