The western part of which river, along with its significant tributaries Sonanadi, Palain and Mandal, forms the prominent hydrological resource for the Corbett National Park?

The Ramganga river (a tributary of the Ganga) along with its major tributaries like Sonanadi, Palain, and Mandal, serves as the lifeline and primary hydrological resource for Jim Corbett National Park situated in Uttarakhand, India.