The Kolar plateau forms the divide between the watersheds of the Penner and the Kaveri, and the Penner drains the northern portion of the plateau, which includes parts of Kolar and Tumkur districts in Karnataka.
The Kolar plateau forms the divide between the Penner watershed and those of the Kaveri and Palar rivers to the south. The Penner drains the northern portion of the plateau, which includes parts of Kolar and Tumkur districts in Karnataka.