Arrange the rivers in ascending order of their contribution to the formation of coastal plains:

The correct answer is Option 1.

Key Points

• The Mahanadi is the largest contributor to the formation of the coastal plains in Odisha, forming a vast delta.
• The Brahmani follows the Mahanadi in terms of contribution. It merges with the Baitarini River before forming a delta.
• The Baitarini is smaller than the Brahmani but plays a significant role in the coastal plains' formation by joining the Brahmani river system.
• The Subarnarekha is smaller than the above rivers and contributes to the northern coastal plains of Odisha and West Bengal.
• The Rushikulya is the smallest among these rivers and contributes minimally to the coastal plains near the southern part of Odisha.

Important Points

• The coastal plains of Odisha are formed by the sedimentation from various rivers such as the Mahanadi, Brahmani, Baitarini, Subarnarekha, and Rushikulya.
• The Mahanadi delta is one of the largest deltas in India and significantly impacts the geography of eastern Odisha.
• The Brahmani and Baitarini rivers combine to form a common deltaic region, contributing to the fertile plains.
• The Subarnarekha flows through Jharkhand, West Bengal, and Odisha, contributing to the northern coastal plains before joining the Bay of Bengal.
• The Rushikulya flows through the southern regions of Odisha and forms a smaller plain near Ganjam district.