Disruption of ecosystems along the Bay of Bengal coast in Odisha is a pressing environmental challenge, impacting various species and their habitats. Human activities, combined with climate change, rising sea temperatures, and increasing tropical cyclones, exacerbate this crisis. The 480 km coastline of Odisha features diverse ecosystems, including tidal flats, marshes, mangroves, sandy beaches, and estuarine river mouths, which support species like Olive Ridley turtles, saltwater crocodiles, blackbucks, and migratory birds. Critical areas like Chilka Lake and the Little Sundarbans mangroves are particularly vulnerable. This study uses the Coastal Hazard Wheel (CHW) model, developed by UNEP with Danish institutions, to assess the vulnerability and risks of ecosystem disruption. The CHW model evaluates coastal hazards such as erosion, inundation, saltwater intrusion, and flooding, using biophysical parameters include geological features, wave exposure, tidal range, flora and fauna, sediment balance, and storm climate. Multi-date satellite images and geospatial tools were used to map areas at risk. Results indicate that 22% of Odisha’s coastline is at very high risk, 74% at moderate risk, and 4% at low risk of ecosystem disruption. The study identifies vulnerable areas and recommends management strategies, including coastal zoning, ecosystem-based management, fluvial sediment management, dune construction, rehabilitation, and coastal setbacks. These strategies, supported by the CHW model, aim to mitigate risks and promote sustainable coastal zone management. Additionally, the study highlights the importance of open-source satellite data and geoinformatics in managing ecosystem disruption in coastal regions.

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Modelling Ecosystem Disruption Along the Odisha Coast of the Bay of Bengal Using Biophysical Parameters

  • Monalisha Mishra,
  • G. K. Panda,
  • Snigdharani Panda

摘要

Disruption of ecosystems along the Bay of Bengal coast in Odisha is a pressing environmental challenge, impacting various species and their habitats. Human activities, combined with climate change, rising sea temperatures, and increasing tropical cyclones, exacerbate this crisis. The 480 km coastline of Odisha features diverse ecosystems, including tidal flats, marshes, mangroves, sandy beaches, and estuarine river mouths, which support species like Olive Ridley turtles, saltwater crocodiles, blackbucks, and migratory birds. Critical areas like Chilka Lake and the Little Sundarbans mangroves are particularly vulnerable. This study uses the Coastal Hazard Wheel (CHW) model, developed by UNEP with Danish institutions, to assess the vulnerability and risks of ecosystem disruption. The CHW model evaluates coastal hazards such as erosion, inundation, saltwater intrusion, and flooding, using biophysical parameters include geological features, wave exposure, tidal range, flora and fauna, sediment balance, and storm climate. Multi-date satellite images and geospatial tools were used to map areas at risk. Results indicate that 22% of Odisha’s coastline is at very high risk, 74% at moderate risk, and 4% at low risk of ecosystem disruption. The study identifies vulnerable areas and recommends management strategies, including coastal zoning, ecosystem-based management, fluvial sediment management, dune construction, rehabilitation, and coastal setbacks. These strategies, supported by the CHW model, aim to mitigate risks and promote sustainable coastal zone management. Additionally, the study highlights the importance of open-source satellite data and geoinformatics in managing ecosystem disruption in coastal regions.