What is CVI? Rough Sea Eroding Coastal Villages in South Gujarat (Download PDF)


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Gujarat’s 1,617 km coastline the longest in the country is the lifeline and is being chewed away across large swaths by the Arabian sea. The tides and currents are becoming high, thus reaching the villages on the banks of Arabian Sea.

Image of Gujarat coast eroding away land

Image of Gujarat Coast Eroding Away Land

Image of Gujarat coast eroding away land

Key Facts About Eroding of Land

  • Recent study shows that 35.98 % of the Gujarat coast is eroding, and 1035.23 sq km area has been lost already.

  • The eroding of coasts is making communities and ecology more vulnerable.

  • The eroding of coasts is having an irreversible effect on fragile marine environments like mangroves and coral reefs.

  • The tides and currents are becoming high, thus reaching the villages on the banks of Arabian Sea.

  • Absence of outlet is letting the water to stay in the villages until it is dried. So the land becomes useless for cultivation.

Who Conducted the Study on the Costal Area of Gujarat?

  • Scientist Manik Mahapatra from National Centre for Sustainable Coastal mamagement (NCSCM), Chennai.

  • Dr AS Rajawat and Dr Rateesh Ramakrishnan from Space Applications Centre (SAC) of Indian Space Research Organisation

Causes of Coastal Erosion

The different causes of coastal erosion are

  1. Climate change

  2. Rising sea levels

  3. Increasing temperatures.

  4. Human activities, without a proper understanding of coastal dynamics

What is CVI?

The study for the first time assigned a Coastal Vulnerability Index (CVI) after studying 1,248 segments of the Gujarat coast. The information was collected with satellite remote sensing and GIS tools. CVI ranged from 31 to 74, indicating that

  • 785 km (45.67%) of the Gujarat coast was under high to very high risk category

  • 934 km (54.33%) was under moderate to low risk from the threat of predicted sea-level rise

Factors Used in Arriving at the CVI?

The CVIs were arrived at using seven risk factors:

  • shoreline change rate

  • sea-level change rate

  • coastal slope

  • mean significant wave height

  • mean tidal range

  • coastal regional elevation

  • coastal geomorphology (physical features)

Policy Action for Protection

  • Eight schemes to prevent erosion will be executed in a phased manner.

  • Includes creating of protection walls of heavy stones – each measuring 2 to 3.5 ton, at the coast.

  • All schemes will be funded under 13th Finance Commission

Which Areas Are Being Affected?

  • Nani Danti and Moti Danti villages of Valsad district and Borsi Macchiwad village of Navsari district are the most affected

  • Bhadeli Jagalala, Nani Danti & Moti Danti villages in Valsad,

  • Dandi, Samapore, Dholai and Borsi Macchiwad in Navsari district

  • Dumas in Surat district

- Published/Last Modified on: March 1, 2018

Environment/Ecology, Geography

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