Aśvanadī (Aswanadi) is a river flowing across Bhojadeśa(Bhojadesa; the land of Bhoja) in Mahābhārata (Mahabharata). Karṇa (Karna), sired by Sūrya (Surya; the Sun-god), was born of the womb of Pṛthā (Pritha), a princess belonging to the Vṛṣṇi(Vrishni)-Bhoja dynasty. Being a virgin mother, out of fear and shame, Pṛtha put Karṇa in a casket and let to flow with the current of the river Aśvanadī —
jātamātrañca taṃ garbhaṃ dhātryā sanmantrya bhābinī
manjuṣāyāṃ samādhāya svātīrnāyāṃ samastataḥ.
madhucchiṣṭāsthitāyaṃ sa sukhāyāṃ rudatī tadā
Carrying the baby Karṇa (Karna), the casket floated across Aśvanadī, and through Carmaṇvatī (Charmanwati) and Yamunā (Yamuna), finally reached the flow of Gaṅgā (Ganga).
According to the scholar N.L.Dey, the Bhoja kingdom was in the city of Kutwar, in the ancient Malwa region. Aśvanadī used to flow by the city of Kuntalapura or Kutwar. The scholars think that Aśvanadī was a dried up branch of the river Camvala. Another name for this Aśvanadī was Aśvaratha(Aswaratha) nadī. Now this entire region belongs to the district of Morena in Madhyapradesh.