Sundarbans, Wetlands, Forests and Hazards of West Bengal — WBCS
Weightage: WBCS Mains General Studies Paper II names environment and biodiversity, coastal regulation zones, global warming and pollution, and Prelims asks about protected areas. The national frame comes from the aliased UPSC CSE environment chapters. Counts and ranks change, so write them "as reported" with a year.
1. Three landscapes
West Bengal's environment divides into three settings: the mangrove delta (Sundarbans), the wetlands and rivers of the plains, and the northern forests and hills. Each has a standard set of facts.
2. The Sundarbans
The Sundarbans is the world's largest mangrove delta, shared between India and Bangladesh, with Bangladesh holding the larger part. It lies at the mouth of the Ganga-Brahmaputra system.
| Status | Year |
|---|---|
| Sundarbans Tiger Reserve | 1973 |
| UNESCO World Heritage (Sundarbans National Park) | 1987 |
| Biosphere Reserve | 1989 |
| Ramsar site (Sundarbans Wetland) | 2019 |
The Indian Sundarbans Ramsar site is reported as the largest Ramsar site in India.
Why it matters. Mangroves such as sundari (Heritiera fomes) have pneumatophores, breathing roots that rise from mud. They protect the coast against storms, breed fish and shelter the Royal Bengal tiger, which here is known for swimming and sometimes preying on people.
3. Threats to the Sundarbans
- Sea-level rise and erosion: islands such as Ghoramara have lost land.
- Cyclones: Aila (2009), Bulbul (2019), Amphan (2020) and Yaas (2021) broke embankments and salted farmland.
- Human-tiger conflict and livelihood pressure from honey and crab collection.
- Salinity and loss of freshwater flow.
Responses include embankment repair, mangrove planting, cyclone shelters, early warning and alternative livelihoods.
4. East Kolkata Wetlands
The East Kolkata Wetlands were designated a Ramsar site in 2002. The city's wastewater feeds fish ponds and vegetable farms, and the wetlands treat it naturally. This is a famous example of wise use of wetlands, linked with the engineer Dhrubajyoti Ghosh. The threat is real-estate conversion.
5. North Bengal forests
- Jaldapara National Park: the greater one-horned rhinoceros.
- Gorumara National Park: rhinoceros and elephants.
- Buxa Tiger Reserve: tigers, elephants and rich forest on the Bhutan border.
- Singalila National Park: the red panda and high-altitude forest.
- Neora Valley National Park and Mahananda Wildlife Sanctuary: biodiversity and elephant range.
Human-elephant conflict and train collisions on forest rail lines are standard issues, and the answer is corridor management, speed limits and early warning.
6. State symbols
The state animal is the fishing cat, the state bird the white-throated kingfisher, the state tree the chhatim, the state flower the shiuli (night jasmine) and the state fish the hilsa (ilish). Confirm the list if a very recent change has been reported.
7. Pollution and groundwater
- Arsenic in groundwater affects parts of the Ganga delta plain, including some districts of Murshidabad, Nadia, North 24 Parganas and Malda. The remedy is safe piped water, testing and alternative sources.
- Air quality in Kolkata and the industrial belt, and waste at the Dhapa landfill, are urban concerns.
- River pollution in the Hooghly from industry and sewage.
8. Policy and law to cite
Cite the Forest Rights Act, Wildlife Protection Act, Coastal Regulation Zone rules (relevant to the Sundarbans coast and Digha) and the Wetlands Rules. The state's disaster management links to the national framework.
9. A Mains pattern
Use resource, threat, law or scheme, and a local case. For the Sundarbans, the case is Amphan or erosion at Ghoramara. For disasters, use hazard, vulnerability, response and resilience.
Common traps WBCS sets here
- Placing the whole Sundarbans in India. It is shared with Bangladesh.
- Mixing the Sundarbans years. Tiger Reserve 1973, World Heritage 1987, Biosphere 1989, Ramsar 2019.
- Calling East Kolkata Wetlands a mangrove. It is a freshwater and wastewater wetland.
- Giving the red panda's park as Jaldapara. It is Singalila.
- Calling arsenic a surface-water problem. It is groundwater.
Memory aids
- "1973, 1987, 1989, 2019": Sundarbans chain.
- "Rhino at Jaldapara and Gorumara, red panda at Singalila": parks.
- "Aila, Bulbul, Amphan, Yaas": four cyclones in order.
Summary
The Sundarbans is a tiger reserve, World Heritage site, biosphere reserve and Ramsar site, threatened by cyclones, sea-level rise and salinity. The East Kolkata Wetlands show wise use of wastewater.
North Bengal protects rhinos, elephants and the red panda. Arsenic in groundwater and urban pollution are the key pollution cases.
Exam protocol
- Learn the Sundarbans years as one chain.
- Use resource, threat, law, local case.
- Attach a year to every count.
