The larger eastern portion of the district, which lies on the Deccan Plateau, is open, fertile, and well cultivated. The Satmala-Chandwad Range, which runs east and west, forms the chief divide of the plateau region. Peninsular India's largest river Godavari originates in the district in the Trimbakeshwar Range and continues eastwards through the district. The Satmala-Chandwad Range forms a watershed, such that, the rivers emerging to its south drain into the Godavari. These include the Kadva and Darna both of which are tributaries of the Godavari. To the north of the Satmala-Chandwad Range, the Girna River and its tributary, the Mosam, flow eastward through fertile valleys into the Tapti River.