What are the main differences between Himalayan and Peninsular drainage systems?

Himalayan rivers are perennial, glacier‑fed, high sediment load, youthful stage with dendritic pattern. Peninsular rivers are seasonal, rain‑fed, lower sediment load, mature stage with varied patterns like trellis, radial, rectangular.

Which is the longest river in Peninsular India?

The Godavari is the longest river in Peninsular India, often called the Dakshin Ganga, with a length of about 1,465 km.

Why are Himalayan rivers important for hydropower generation?

Himalayan rivers have steep gradients and high flow velocities, making them ideal for hydroelectric projects; examples include the Tehri and Subansiri dams.