India is a country that is bordered on three sides by the sea. India's coastal lowlands run along the country's west and east coasts. The Indian coastline, which is 7516.6 kilometres long, includes 6100 kilometres of mainland coastline as well as the islands of Andaman, Nicobar, and Lakshadweep. India's coastline includes 13 states and union territories. The western coastal lowlands go along to the Arabian Sea, while the eastern coastal plains run parallel to the Bay of Bengal. This article will explain to you about The Western and Eastern Coastal Plains which will be helpful in Geography preparation for the UPSC Civil service exam.

Coastal Plain

• The Peninsular plateau is bounded on both sides by small coastal strips that extend along the Arabian Sea on the west and the Bay of Bengal on the east.
• The coastal plains of India are divided into two categories, with a total length of 7516.6 km:
  • Eastern Coastal Plains of India
  • Western Coastal Plains of India

Coastal Plain

Eastern Coastal Plains of India

• The eastern coastal plains go from West Bengal in the north to Tamil Nadu in the south, passing through Andhra Pradesh and Odisha along the way.
• The eastern coastal plain has deltas of the rivers Mahanadi, Krishna, Godavari, and Cauvery.
• Agriculture thrives in the deltas, which are extremely fertile and productive. As a result, the Krishna River delta is known as the "Granary of South India."
• The eastern shore is separated into three sections:
  • The Utkal coast
  • The Andhra coast
  • The Coromandel coast
• The Utkal coast, which stretches between Chilika Lake and Kolleru Lake, is significantly wider than the western coastal plains and receives a lot of rain.
• Rice, coconut, and banana are some of the crops grown here.
• The Mahanadi delta is part of it.
• The Chilka Lake is the plain's most notable physiographic feature.
• The Andhra coast, which stretches between Kolleru Lake and Pulicat Lake, serves as a basin region for the Krishna and Godavari rivers.
• It runs south of the Utkal Plain and up to Pulicat Lake. Sriharikota Island, a lengthy sand spit, has blocked access to this lake.
• With the exception of Visakhapatnam and Machilipatnam, this area of the plain has a straight shoreline and a severe shortage of excellent harbours.
• The Coromandel coast stretches between Pulicat Lake and Kanyakumari in Tamil Nadu.
• Due to the north-east monsoons, this Indian coastline remains dry in the summer and receives rainfall in the winter.
• The Cauvery delta, which is 130 kilometres wide, is the plain's most notable feature.
• The Cauvery delta has become the granary of South India due to its fertile land and large-scale irrigation systems.

Western Coastal Plains of India

• The Western Coastal Plains go from Kerala in the south to Gujarat in the north, passing through Karnataka, Goa, and Maharashtra along the way.
• The western coastal plains run about 1500 kilometres north to south, with widths ranging from 10 to 25 kilometres.
• The West Continental Shelf is at its broadest near the coast of Bombay. This region is rich in oil.
• There are several gorgeous lagoons along the Malabar Coast, making it a popular tourist destination.
• The western shore is narrower than the east.
• The western coast is classified into four sections:
  • Kachchh and Kathiawar coast
  • Konkan coast
  • Kanada coast
  • Malabar coast
• The coasts of Kachchh and Kathiawar are produced by the depositing of silt by the Indus.
• During the monsoons, the land of Kachchh is covered with shallow water and is separated into Great Rann in the north and Little Rann in the east.
• The Kutch Peninsula was an island with oceans and lagoons surrounding it. The material transported by the Indus River, which used to flow through this area, subsequently filled these seas and lagoons.
• Due to a lack of rain in recent years, the environment has become parched and semi-desert.
• Kathiawar, on the other hand, is located to the south of Kachchh.
• The Konkan coast stretches from Daman in the north to Goa in the south. The two most significant crops in this region are rice and cashew.
• The Kanada coast, which stretches between Madgaon and Mangalore, is rich in iron resources.
• The plain is narrow, with an average width of 30-50 kilometres and a maximum of 70 kilometres near Mangalore.
• Streams that originate in the Western Ghats down steep hillsides and form waterfalls in certain areas.
• The Malabar coast stretches from Mangalore to Kanyakumari and is rather extensive.
• This region also includes lagoons that run parallel to the shore in southern Kerala.
• The Malabar coast contains distinct characteristics in the form of 'Kayals' (backwaters), which are utilised for fishing, interior navigation, and tourism.

Coastal Plain - Significance

• India's coastline stretches about 7516.6 kilometres, including the island groups of Andaman & Nicobar and Lakshadweep.
• As a result, the areas covered by the Indian coasts have a favourable environment with no severe temperatures, making them perfect for human growth.
• The coastal plains of India are largely covered by lush soils that are ideal for agriculture. Rice is the most important crop grown in these areas.
• The huge and small ports around the Indian coasts assist in carrying out commerce.
• These coastal plains' sedimentary rocks are reported to have huge amounts of mineral oil that can be utilised as a source of marine economy.
• Fishing has become an essential vocation for individuals who live along the coast.
• The coastal plains of India are rich in coastal and marine habitats, as well as a diverse assortment of mangroves, coral reefs, estuaries, and lagoons that provide excellent tourism opportunities.

Difference between Eastern and Western Coastal Plains

Emergence and Submergence Coastlines

• Either an elevation of the land or a decrease of the sea level forms the emerging coastline. The coastline of submergence is the polar opposite.
• The characteristic features of emergence include bars, spits, lagoons, salt marshes, beaches, sea cliffs, and arches.
• 'Marine Landforms' is a term that refers to the landforms found in the
• The east coast of India, particularly the south-eastern half (the Tamil Nadu coast), looks to be an emerging coast.
• On the other hand, India's west coast is simultaneously emerging and submerging.
• Faulting has buried the northern section of the coast, whereas the southern half, which includes the Kerala coast, is an example of an emergent coast.

Conclusion

The 7516.6-kilometer Indian coastline contains 6100 kilometres of mainland coastline as well as the islands of Andaman, Nicobar, and Lakshadweep. The faulting of the Gondwana continent during the Cretaceous epoch resulted in India's straight and regular coastline. India's coastline stretches over 13 states and union territories. The Arabian Sea runs through the western coastal plains, while the Bay of Bengal runs through the eastern coastal plains.

GS Mains Questions and Model Answers

Q1: Compare and contrast the geographical features of the Western Coastal Plains and the Eastern Coastal Plains of India.

Answer: The Western Coastal Plains and the Eastern Coastal Plains are two distinct geographical regions along India’s coastline. The Western Coastal Plains are narrower and steeper, lying between the Western Ghats and the Arabian Sea. This region features natural harbors such as Mumbai and Kochi, which are important for maritime trade. The coastline is rugged, with limited river drainage due to the steep slopes. In contrast, the Eastern Coastal Plains are broader and flatter, lying between the Eastern Ghats and the Bay of Bengal. This region is characterized by large river deltas formed by rivers like the Mahanadi, Godavari, Krishna, and Cauvery, making it fertile and ideal for agriculture. While the Western Plains have more developed harbors, the Eastern Plains are agriculturally more productive due to the fertile alluvial soils.

Q2: Discuss the economic significance of the Western and Eastern Coastal Plains in India.

Answer: The Western and Eastern Coastal Plains play a crucial role in India's economy. The Western Coastal Plains, with their natural harbors, support major ports such as Mumbai, Kochi, and Mangalore, which are key centers for international trade. The region is also known for its fishing industry and coconut cultivation. On the other hand, the Eastern Coastal Plains are agriculturally rich due to the presence of large river deltas, supporting the cultivation of rice, pulses, and other crops. Major ports like Chennai and Visakhapatnam facilitate maritime trade. The coastal plains, both western and eastern, are also vital for India's fishing industry and tourism, contributing to the livelihoods of millions.

Q3: Examine the environmental challenges faced by the coastal plains of India.

Answer: The coastal plains of India face several environmental challenges, including coastal erosion, rising sea levels due to climate change, and pollution. Rapid urbanization and industrialization along the coasts have led to the destruction of mangroves, which act as natural buffers against storms and erosion. In the Western Coastal Plains, issues like oil spills and industrial waste have affected marine life and fishing communities. In the Eastern Coastal Plains, frequent cyclones and floods due to the low-lying topography pose significant threats to agriculture and settlements. Additionally, unregulated tourism and construction activities in coastal regions exacerbate environmental degradation. Addressing these challenges requires comprehensive coastal management policies that balance development with ecological sustainability.

Previous Year Questions on  Western and Eastern Coastal Plains

1. UPSC CSE 2017

Question: Compare the Western and Eastern Coastal Plains of India in terms of their geographical features and economic significance. 

Answer: The Western and Eastern Coastal Plains of India differ significantly in terms of geography and economic importance. The Western Coastal Plains are narrow, with steep slopes and natural harbors like Mumbai and Kochi, making them key centers for maritime trade and industry. The region's proximity to the Arabian Sea also supports a thriving fishing industry. The Eastern Coastal Plains, in contrast, are broad and flat, featuring large river deltas formed by rivers like the Godavari and Krishna. These deltas make the Eastern Plains agriculturally fertile, supporting extensive rice cultivation and other crops. Ports like Chennai and Visakhapatnam play a critical role in trade on the eastern coast. Both coastal plains are vital for India’s economy, supporting fishing, agriculture, tourism, and international trade.

2. UPSC CSE 2018

Question: Analyze the impact of coastal erosion on the livelihood of communities living along the Eastern Coastal Plains. 

Answer: Coastal erosion significantly impacts the livelihoods of communities living along the Eastern Coastal Plains. The region’s proximity to large rivers and the Bay of Bengal makes it vulnerable to erosion, particularly in areas where river deltas meet the sea. Coastal erosion can lead to the loss of agricultural land, homes, and infrastructure, directly affecting the income and well-being of farmers and fishing communities. In states like Odisha and Andhra Pradesh, rising sea levels and storm surges exacerbate the problem, causing frequent displacement of coastal populations. The destruction of mangroves, which serve as natural barriers against erosion, further increases the vulnerability of these communities. Sustainable coastal management, including afforestation of mangroves and construction of protective barriers, is essential to mitigate the impact of coastal erosion.