In News:

India’s coastline has grown significantly over the past five decades, now extending 11,098 km in 2023-24, compared to 7,516 km in 1970. This marks an increase of 47.6% in just over five decades, attributed to a more precise methodology for measuring coastlines.

Key Factors Behind the Growth:

New Methodology for Measuring Coastlines:

• The old methodology used straight-line distances to measure the coastline, a method that didn't capture the complexity of India’s coastlines.
• The updated approach incorporates bays, estuaries, inlets, and other geomorphological features, offering a more accurate and detailed representation of the coastline.
• Advanced technologies like geospatial mapping have been used to ensure greater precision.

State-wise Recalculated Coastline Changes:

• Gujarat:
  • Old coastline (1970): 1,214 km
  • New coastline (2023-24): 2,340 km
  • Growth: The largest absolute increase in coastline, nearly doubling its size.
• West Bengal:
  • Old coastline: 157 km
  • New coastline: 721 km
  • Growth: A dramatic 357% increase, marking the highest percentage rise.
• Tamil Nadu:
  • Old coastline: 906 km
  • New coastline: 1,068 km
  • Growth: Revised length now exceeds Andhra Pradesh’s coastline, which was 1,053 km.
• Puducherry:
  • Old coastline: No major shift, but the updated data shows a contraction of 4.9 km (-10.4%), due to erosion and recalculations.
• Kerala:
  • Old coastline: Relatively small increase of 30 km (5%), the smallest among the states.

Notable Observations:

• Andhra Pradesh is developing new ports like Ramayapatnam, Krishnapatnam, and Kakinada Gateway, aiming to boost economic growth and employment by leveraging its expanding coastline.
• The recalculated coastline helps in better maritime planning, focusing on port development, tourism, biodiversity conservation, and coastal erosion.

Impact of Coastline Expansion:

• Economic Growth:
  • Coastal states, particularly Gujarat and West Bengal, benefit from an expanded coastline that improves maritime trade, port infrastructure, and tourism.
  • The expansion supports industrialization, with growing logistics and transportation activities along the coast.
• Environmental Considerations:
  • The new data aids biodiversity conservation, helping to track coastal erosion and accretion (land buildup), especially in areas like the West Coast.
  • Understanding these changes is essential for disaster preparedness and sustainable coastal management.
• Coastlines of Emergence and Submergence:
  • Emerging Coastlines: Land rising due to uplift or falling sea levels, such as along the Tamil Nadu Coast.
  • Submerged Coastlines: Land that has sunk or been submerged due to rising sea levels, particularly noticeable along parts of Kerala’s coast.

Geographical Significance of the Expanded Coastline:

• India’s coast touches three major bodies of water: the Bay of Bengal (east), the Indian Ocean (south), and the Arabian Sea (west).
• The expansion reflects more than just geography—accurate coastline data is crucial for policy planning, maritime security, and resource management.

Why is it in the News?

The principal bench of the National Green Tribunal (NGT) in New Delhi has initiated action on the Netravati Waterfront Promenade Development Project in Mangaluru.

About the Netravati River:

• The Netravati River, also known as Netravathi Nadi, originates from the Bangrabalige valley, Yelaneeru Ghat in Kudremukh, Chikkamagaluru district, Karnataka, India.
• It passes through the revered pilgrimage site Dharmasthala, earning recognition as one of India's sacred rivers.
• Converging with the Kumaradhara River at Uppinangadi, it eventually flows into the Arabian Sea, south of Mangalore city, serving as the primary water source for Bantwal and Mangalore.
• The Netravati railway bridge, a prominent structure, acts as the gateway to Mangalore.
• Historically known as the Bantwal River, it was documented as unfordable during the South-West Monsoon in the 1855 Gazetteer of Southern India.
• The river's navigability by small country craft and its influence on local geography and transport, including the naming of the Netravati Express train, underscores its significance in the region's history.
• Instances of flooding, notably in 1928 and 1974, have shaped the lives of residents, prompting relocations and resilience

About the National Green Tribunal:

• The National Green Tribunal (NGT) was established under the National Green Tribunal Act of 2010.
• While its principal seat is located in New Delhi, it also holds sessions in Bhopal, Pune, Kolkata, and Chennai.
• The NGT is entrusted with the responsibility of adjudicating applications or appeals, ensuring their final disposition within six months of filing.

Composition:

• The tribunal comprises a Chairperson, Judicial Members, and Expert Members, each serving a non-renewable term of five years.
• The appointment of the Chairperson is made by the Central Government in consultation with the Chief Justice of India (CJI).
• A Selection Committee, constituted by the Central Government, is responsible for appointing both Judicial and Expert Members.
• The tribunal can accommodate a minimum of 10 and a maximum of 20 full-time Judicial and Expert Members.

Powers & Jurisdiction:

• Established to efficiently handle cases concerning environmental protection and conservation of natural resources, including forests.
• It possesses appellate jurisdiction akin to a court.
• While not bound by the procedural formalities outlined in the Code of Civil Procedure, 1908, the NGT operates based on the principles of natural justice.