Maarg Manthan · Topic 14.5

Western Coastal Plains of India

Geography › India: Plains, Plateau, Coasts and Islands · Topic 14.5

The Western Coastal Plain is a narrow strip, about 65 km wide on average, between the Western Ghats and the Arabian Sea, from the Rann of Kachchh to Kanyakumari. Its divisions are the Kachchh and Kathiawar region, the Gujarat plain, the Konkan plain, the Karnataka coastal plain and the Kerala or Malabar plain, with lagoons and backwaters in the south and no large deltas.

5 min read · UPSC Prelims · Geography · India: Plains, Plateau, Coasts and Islands

At a Glance

Width About 65 km on average
Extent Rann of Kachchh to Kanyakumari
Divisions Kachchh-Kathiawar, Gujarat, Konkan, Karnataka, Kerala
Rivers Short, fast, west-flowing; estuaries not deltas
Special Backwaters and lagoons of Kerala
Exam link UPSC Prelims, Geography: India: Plains, Plateau, Coasts and Islands

Where Does It Fit?

This is the fifth topic of the macro on India’s plains, plateau, coasts and islands. The previous topic introduced the coastline, and this one takes the west coast plain by plain. The next topic covers the broader eastern coastal plains. Previous topic: Coastline of India – Emergence and Submergence. Next topic: Eastern Coastal Plains of India.

What Are the Divisions of the Western Coastal Plain?

Division	Extent and width	Features
Kachchh and Kathiawar	Gujarat; an extension of the Peninsula, but levelled and treated as part of the plain	Kachchh was once an island, later filled by sediments, and is now arid; the Great Rann to the north and the Little Rann to the south-east are salt flats; Kathiawar has the Mandav hills with radial drainage, Mount Girnar (1,117 m) of volcanic origin, and the Gir range, home of the Asiatic lion
Gujarat Plain	East of Kachchh and Kathiawar; South Gujarat and the Gulf of Khambhat	Formed by the Narmada, Tapti, Mahi and Sabarmati; fertile in the east, with sand and loess near the coast; large tides in the Gulf of Khambhat
Konkan Plain	Daman to Goa; 50 to 80 km wide	Submerged, with cliffs, shoals, reefs and islands; the Thane creek forms the natural harbour of Mumbai; rocky, with laterite
Karnataka (Kanara) Plain	Goa to Mangalore; 30 to 50 km wide, up to about 70 km	Narrow, with steep streams from the Ghats forming waterfalls such as the Jog (Gersoppa) Falls on the Sharavati, about 250 m high; sea cliffs and small estuaries
Kerala (Malabar) Plain	Mangalore to Kanyakumari	The Malabar Plain is wider and low-lying; lagoons, lakes, backwaters called kayals, spits and sandbars; Vembanad is the largest lake; monazite-bearing sands

The western plain is made of the alluvium brought down by short, fast streams from the Western Ghats, and the sea has cut the coast with coves and creeks, as in Coastline of India – Emergence and Submergence. The plain is narrow because the Ghats stand close to the sea, and it widens only in Gujarat and Kerala, where the slope of the land is gentler and the rivers have brought more sediment. Only the Narmada and the Tapti form large estuaries, since they flow in rift valleys, and the other rivers, such as the Mandovi, Zuari, Sharavati and Periyar, are short and steep and cannot build deltas because the tides and waves remove the sediment.

What Are the Backwaters and Resources of the West Coast?

Backwaters: the Kerala backwaters are a network of shallow lagoons, canals and lakes lying parallel to the coast, separated from the sea by sandbars. Vembanad Lake, about 75 to 96 km long depending on how its channels are counted, is the biggest, and is a Ramsar wetland, with Alappuzha and Kumarakom as tourism centres.
Ports: Kandla (Deendayal), Mumbai and Jawaharlal Nehru Port (Nhava Sheva), Mormugao, New Mangalore and Kochi. The Vizhinjam deep-water port in Kerala, which began commercial operations in 2025, is designed to handle large container ships as a transhipment hub close to the international east-west shipping route, as in The Indian Ocean.
Agriculture: rice, coconut, spices, cashew, rubber and plantation crops, supported by heavy rain from the southwest monsoon, as in Mechanism of the Indian Monsoon. Gujarat’s coast is known for salt production.
Minerals and energy: offshore oil and gas of the Bombay High field, and the monazite sands of Kerala, rich in thorium.
Fishing and tourism: the Malabar and Konkan fishing, beaches in Goa and the backwater tourism of Kerala.

The Konkan Railway, completed in 1998 along the Konkan and Karnataka coasts, was a major engineering effort through the steep terrain and its numerous rivers. As an analytical point, the west coast has high rainfall, dense population in Kerala and a hazard profile of floods, landslides and sea erosion: the Kerala floods of 2018, the Wayanad landslides of 2024 and the recurring coastal erosion show that the narrowness of the plain, with the Ghats rising right behind, leaves little room for error in land use.

Why Is This Topic Important?

Map-based Divisions and lakes asked
Economy Ports and spices
Risk Floods and landslides

What Came Next?

The next topic describes the eastern coastal plains of India. Next topic: Eastern Coastal Plains of India.

Key People and Terms

Konkan Maharashtra-Goa coastal plain
Kanara Karnataka coastal plain
Malabar Kerala coastal plain
Kayal Backwater lagoon
Rann Salt marsh of Kachchh
Estuary Tidal river mouth

Exam Corner

Points to Remember

Average width is about 65 km.
West-flowing rivers form estuaries, not deltas.
Jog Falls is on the Sharavati.
Vembanad is Kerala’s largest lake.
The Gir range is home to the Asiatic lion.

Do Not Confuse With

Great Rann and Little Rann North of Kachchh versus south-east
Konkan and Kanara Maharashtra-Goa versus Karnataka
Estuary and delta Tide-dominated versus sediment-built

Memory Hook

Rann, Gir, Gujarat plain, Konkan creeks, Kanara falls, Kerala kayals: north to south.

Mains Angle

Questions compare the two coastal plains. These points add depth.

Width Narrow versus broad
Rivers Estuaries versus deltas
Economy Ports and plantations

A Question You May Face

An original practice question, not a past paper question.

“Describe the divisions of the Western Coastal Plain and explain why its rivers form estuaries and not deltas.”

How to Answer

Extent Rann to Kanyakumari.
Divisions Five.
Rivers Short and steep.
Economy Ports, plantations, backwaters.

GS Relevance

Prelims: divisions with extent, rivers, lakes, ports, Jog Falls, backwaters. GS Paper 1: physical geography; GS Paper 3: ports and coastal economy.

Frequently Asked Questions

What are the divisions of the Western Coastal Plain?

The Western Coastal Plain is divided into the Kachchh and Kathiawar region, the Gujarat plain, the Konkan plain from Daman to Goa, the Karnataka or Kanara plain from Goa to Mangalore, and the Kerala or Malabar plain from Mangalore to Kanyakumari.

Why does the west coast have no large deltas?

The rivers of the west coast are short and steep, flowing from the Western Ghats which are close to the sea, and they flow into the sea in estuaries. Tides and waves remove their sediment, and the Narmada and Tapti, which flow in rift valleys, form estuaries and not deltas.

What are the Kerala backwaters?

The Kerala backwaters are a network of lagoons, lakes, canals and inlets running parallel to the coast and separated from the sea by sandbars. They are called kayals, and the Vembanad Lake is the largest. They support fishing, rice cultivation, inland navigation and tourism.

Where are the Jog Falls?

The Jog Falls, also known as the Gersoppa Falls, are on the Sharavati River in Karnataka, where the river drops from the plateau edge of the Western Ghats toward the coastal plain. They are among the highest waterfalls in India, at about 250 metres.

Which are the important ports of the west coast?

The important ports on the west coast include Kandla or Deendayal, Mumbai, Jawaharlal Nehru Port at Nhava Sheva, Mormugao in Goa, New Mangalore, and Kochi. The Vizhinjam deep-water port in Kerala, which began operation in 2025, is meant to be a container transhipment hub.

PYQ Practice — Statement Analysis

1 The rivers of the Western Coastal Plain form large deltas.

False

They form estuaries.

2 The Konkan plain extends from Daman to Goa.

True

It is 50 to 80 km wide.

3 Vembanad Lake is in Kerala.