Explanation: The Penganga, the Indravati, the Pranhita, and the Manjra are Godavari’s principal tributaries.

• The Godavari is subjected to heavy floods in its lower reaches to the south of Polavaram, where it forms a picturesque gorge.
• It is navigable only in the deltaic stretch. The river after Rajamundri splits into several branches forming a large delta.

Source: NCERT