Coastal Indian States: Geography, Economy and Ports

India’s Coastal Geography

India has a long and strategically important coastline that supports trade, fisheries, biodiversity, ports, tourism and coastal security. It stretches across the Arabian Sea, the Bay of Bengal and the Indian Ocean, with distinct physical and economic patterns on the western and eastern seaboards.

The coastline includes mainland and island territories, and forms a key maritime zone for shipping, offshore resources and regional connectivity. For Prelims, the major coastal divisions, island groups, ports and state-wise features are especially important.

Extent and Major Coastal Divisions

• Total coastline: 7,516.6 km, including 5,422.6 km of mainland coastline and 2,094 km of island territories.
• Coastal states and UTs: The coastline spans nine states and four Union Territories.
• Exclusive Economic Zone: India’s maritime zone covers over 2 million square kilometres.
• Western coast: Extends from the Rann of Kutch to Kanyakumari between the Western Ghats and the Arabian Sea.
• Eastern coast: Extends from the Subarnarekha River to Kanyakumari between the Eastern Ghats and the Bay of Bengal.
• Western coastal plains: A submerged coast with narrow plains, rocky headlands, estuaries and backwaters.
• Eastern coastal plains: An emergent coast with wide plains, fertile deltas and shallow lagoons.

Western and Eastern Coast: Physical Features

• Western coastal sub-regions: Kathiawar/Kutch Peninsula in Gujarat, Konkan Coast in Maharashtra and Goa, Kanara Coast in Karnataka, and Malabar Coast in Kerala.
• Eastern coastal sub-regions: Utkal Plains in Odisha, Northern Circars in Andhra Pradesh, and Coromandel Coast in Tamil Nadu.
• West-flowing rivers: Narmada, Tapti, Mandovi, Zuari and Periyar are swift and usually form estuaries rather than large deltas.
• East-flowing rivers: Mahanadi, Godavari, Krishna and Kaveri carry large sediment loads and form broad deltas.
• Coastal landforms: The west coast is marked by creeks, rocky stretches and backwaters, while the east coast has long sandy stretches and deltaic plains.

Island Territories

• Andaman and Nicobar Islands: Located in the Bay of Bengal and consisting of 572 islands of volcanic and tectonic origin.
• Barren Island: The only active volcano in India.
• Lakshadweep Islands: Located in the Arabian Sea and made up of 36 coral atolls, reefs and submerged banks.
• Coral origin: Lakshadweep islands were formed by coral polyps, making them important for marine ecology.

State-wise Coastal Geography, Economy and Ports

Ports and Maritime Significance

• Major west-coast ports: Mumbai Port, JNPA, Deendayal Port Trust, Mormugao Port, New Mangalore Port and Cochin Port.
• Major east-coast ports: Chennai Port, Kamarajar Port, V.O. Chidambaranar Port, Visakhapatnam Port and Paradip Port.
• Private and deep-water ports: Mundra, Pipavav, Krishnapatnam and Gangavaram are important for commercial cargo movement.
• Container handling: JNPA is India’s largest container port.
• Natural harbours: Mumbai Port is among India’s oldest natural deep-water harbours, while Visakhapatnam is a major landlocked harbour.
• Specialised cargo: Mormugao handles bulk iron ore, New Mangalore handles crude oil imports and Paradip handles bulk coal and mineral cargo.
• Transshipment role: Cochin Port’s International Container Transshipment Terminal at Vallarpadam and Vizhinjam are important for maritime connectivity.

High-yield fact: India’s coastline is not uniform—western coasts are generally estuarine and rocky, while eastern coasts are more deltaic and depositional.

Key Prelims Takeaways

• Total coastline: 7,516.6 km, with a large share contributed by the mainland.
• West coast: Submerged, narrow and estuarine; especially important for ports and offshore oil.
• East coast: Delta-rich and depositional; important for agriculture, aquaculture and major harbours.
• Andaman and Nicobar: 572 islands; Barren Island is India’s only active volcano.
• Lakshadweep: Coral atolls in the Arabian Sea, important for marine ecology.
• Long coastline states: Gujarat, Andhra Pradesh and Tamil Nadu are among the most significant in coastal geography.
• Port importance: Deendayal, JNPA, Chennai, Visakhapatnam and Paradip are key exam ports.