The coastal plains

India shares the longest coastline with the Indian Ocean and east and west coastal plains are its two margins.

Let us discuss more about coastal plains

They run along the Arabian sea on the east coast, and the Bay of Bengal on the west coast.

The peninsular rivers and the seas are responsible for creating what we call the coastal plains.

The sea waves cause erosion and deposition, and the rivers bring in sediments. This leads to the formation of coastal plains.

Let us explore western coastal plains in detail

Talking about the western coastal plains, they are 10-15 km wide, narrower than the eastern plains.

The western plains are actually divided into four sections.

The part of the plains in Mumbai-Goa is called the Konkan plains.

The central stretch is called the Kannad plain, and it lies in Karnataka.

The southernmost stretch is the Malabar plains, lying in Kerala.

There is another smaller part of the western plains lying in Gujarat, called the Kathiawar coast.

The Malabar coast is full of lakes, backwaters and lagoons, called Kayals by the locals.

The Vembanad lake in Kerala is the largest of these backwater lakes.

If you’re wondering what a backwater is, it is that part of the river where the current does not reach, and the water is stagnant.

The Gujarat coastal plains also have presence of water bodies, with estuaries formed by the Mahi, Narmada, Sabarmati, and Tapti rivers.

Let us now discuss the eastern coastal plains

Along the Bay of Bengal, the eastern coastal plains are wider, and are level.

The northern part of the plains is known as the Northern Circar, which is present in Odisha and West Bengal.

The eastern coastal plains can be divided into 3 major parts.

The southern part is called the Coromandel coast, present in Tamil Nadu.

Rivers like the Godavari and the Mahanadi have formed large deltas on the east coast.

Eastern coastal plain has the largest saltwater lake in India, Lake Chilika.

It lies in the state of Odisha, south of the Mahanadi delta.

The Mahanadi delta is also called the Utkal plain.

The outline of the eastern coastal plains is regular. They are characterized by sea beaches.

The rivers that flow through the eastern plains follow zig-zag patterns.

Therefore, both east and west flowing rivers are found in this area.


The coastal plains are narrow strips of land at the edges of the peninsular plateau.

They lie on the edge of the Arabian sea in the west, and the Bay of Bengal in the east.

The western plains are narrow, and are divided into three sections.

These are the Malabar coast, the Kannad coast, and the Konkan coast.