Sundarban Wetland Ramsar Site

The Sundarban Wetland was designated a Wetland of International Importance under the Convention on Wetlands of International Importance especially as Waterfowl Habitat—the Ramsar Convention, signed at Ramsar, Iran, on 2 February 1971—on 30 January 2019, becoming Ramsar Site No. 2370. India ratified the Convention on 1 October 1981, acceding to obligations under Article 2, which requires each Contracting Party to designate at least one wetland for inclusion in the List of Wetlands of International Importance, and Article 3, which obliges parties to promote conservation and "wise use" of listed sites. The Sundarban designation covers 4,230 square kilometres, making it the largest Ramsar Site in India at the time of listing and one of the largest protected wetlands in the world. The site lies within the Indian portion of the larger Ganges–Brahmaputra–Meghna delta, the world's most extensive contiguous mangrove forest, shared with Bangladesh, whose adjacent Sundarbans Reserved Forest was itself designated a Ramsar Site (No. 560) in 1992.

The designation process under the Ramsar framework proceeds through a defined sequence. A Contracting Party identifies a candidate wetland meeting one or more of the nine Ramsar Criteria for Identifying Wetlands of International Importance, prepares a Ramsar Information Sheet documenting the site's ecological character, hydrology, and biodiversity, and submits it to the Ramsar Secretariat in Gland, Switzerland. The Secretariat reviews the documentation and, upon acceptance, enters the site on the List with a unique reference number and effective date. In India, the nodal authority is the Ministry of Environment, Forest and Climate Change (MoEFCC), which coordinates with the relevant state government—here the Government of West Bengal—and the state forest department to compile the dossier. The Sundarban Wetland qualified under multiple criteria, including Criterion 2 (supporting vulnerable, endangered, or critically endangered species) and Criterion 4 (supporting species during critical life-cycle stages).

The wise use principle distinguishes the Ramsar regime from strict-preservation models: the Convention defines wise use as the maintenance of a wetland's ecological character through ecosystem approaches within the context of sustainable development, explicitly permitting human use compatible with conservation. The Montreux Record, established by Recommendation 4.8 in 1990, is a register of listed sites where changes in ecological character have occurred, are occurring, or are likely to occur as a result of technological developments, pollution, or other human interference; placement on this Record can trigger advisory missions. The Sundarban Wetland is not on the Montreux Record. National implementation in India operates through the Wetlands (Conservation and Management) Rules, 2017, framed under the Environment (Protection) Act, 1986, which prohibit specified activities and require state-level wetland authorities to maintain ecological character.

The Sundarban Wetland overlaps spatially with several other designations administered from Kolkata and New Delhi. The Sundarbans National Park, within the site, was inscribed as a UNESCO World Heritage Site in 1987, and the broader area was declared a UNESCO Man and the Biosphere Reserve in 2001. The Sundarban Tiger Reserve, constituted under Project Tiger, protects the Royal Bengal Tiger (Panthera tigris tigris), the apex predator that has adapted to a saline, swimming-intensive habitat. The MoEFCC and the West Bengal Forest Department jointly manage these overlapping regimes. As of the mid-2020s, India had designated more than 80 Ramsar Sites, the highest count in Asia, following a rapid expansion drive that added dozens of sites between 2020 and 2024.

The Ramsar designation must be distinguished from adjacent conservation instruments. A World Heritage Site under the 1972 UNESCO Convention concerning the Protection of the World Cultural and Natural Heritage is selected for outstanding universal value and managed by the World Heritage Committee, a body distinct from the Ramsar Secretariat. A Biosphere Reserve under the Man and the Biosphere Programme zones land into core, buffer, and transition areas to reconcile conservation with development, and confers no treaty-based legal protection. A National Park or Wildlife Sanctuary under India's Wild Life (Protection) Act, 1972 is a domestic statutory category enforced by criminal sanction. The Ramsar listing is an international commitment focused specifically on wetland ecological character and the wise-use obligation, layering soft-law international accountability over these domestic instruments rather than replacing them.

The Sundarban Wetland faces documented threats that bear on its continued ecological character. Sea-level rise associated with climate change, increasing salinity intrusion, cyclonic events such as Cyclone Amphan in May 2020 and Cyclone Yaas in May 2021, embankment failures, and reduction of freshwater flow have been cited in assessments of the delta. The disappearance of islands such as Lohachara and the partial submergence of others have generated debate over climate-displaced populations. Human–wildlife conflict, particularly tiger attacks on fishers and honey collectors, remains acute. Critics have questioned whether India's accelerated designation of Ramsar Sites has been matched by adequate management-plan implementation and monitoring, given the resource constraints of state wetland authorities.

For the working practitioner—whether preparing for the UPSC Civil Services Examination General Studies Paper III, briefing on transboundary environmental diplomacy, or advising on delta governance—the Sundarban Wetland exemplifies the intersection of international environmental law, federal–state division of competence, and climate adaptation. It illustrates how a single landscape can carry layered Ramsar, World Heritage, Biosphere Reserve, and Tiger Reserve designations, each with distinct legal authority and institutional custodian. The transboundary character of the Sundarbans, split between India and Bangladesh, also makes it a reference point for cooperative ecosystem management and a recurring subject in examination and policy discussion of wetland conservation, mangrove resilience, and the Ramsar Convention's wise-use doctrine.