Environment and Ecology accounts for 15-20 questions in UPSC Prelims every year. Wetlands and Ramsar sites are a favorite area for examiners. Here is the ultimate state-wise list of Ramsar sites and key ecological features.
Prelims 2026 Strategic Trend Alert: UPSC has shifted from asking simple location-based questions to multi-statement conceptual questions linking wetlands with river systems, migratory flyways, flagship endemic fauna, and international treaties. Mastering this guide will ensure 100% accuracy in wetland-related questions across UPSC CSE and State PSC examinations.
1. What is a Ramsar Site? Detailed Background & Legal Framework
A Ramsar site is a wetland designated to be of international importance under the Ramsar Convention on Wetlands (signed in Ramsar, Iran in 1971). India is a contracting party to the convention since 1982.
The Ramsar Convention defines wetlands broadly as: “areas of marsh, fen, peatland or water, whether natural or artificial, permanent or temporary, with water that is static or flowing, fresh, brackish or salt, including areas of marine water the depth of which at low tide does not exceed six metres.”
Key Ramsar Criteria for Designation
To be declared a Ramsar Site of International Importance, a wetland must meet at least one of nine specific criteria established by the Ramsar Convention, divided into two primary groups:
- Group A — Sites containing representative, rare or unique wetland types:
- Criterion 1: Contains a representative, rare, or unique example of a natural or near-natural wetland type found within the appropriate biogeographic region.
- Group B — Sites of international importance for conserving biological diversity:
- Criterion 2 (Threatened species): Supports vulnerable, endangered, or critically endangered species or threatened ecological communities.
- Criterion 3 (Ecological community support): Supports populations of plant and/or animal species important for maintaining the biological diversity of a region.
- Criterion 4 (Critical life-cycle stages): Supports plant and/or animal species at a critical stage in their life cycles, or provides refuge during adverse conditions (e.g., migratory stopovers).
- Criterion 5 (20,000+ Waterbirds): Regularly supports 20,000 or more waterbirds.
- Criterion 6 (1% Waterbird Population): Regularly supports 1% of the individuals in a population of one species or subspecies of waterbird.
- Criterion 7 (Fish diversity): Supports a significant proportion of indigenous fish subspecies, species, or families.
- Criterion 8 (Fish lifecycle & nursery): Important source of food for fishes, spawning ground, nursery, and/or migration path on which fish stocks depend.
- Criterion 9 (Non-avian animal species): Regularly supports 1% of the individuals in a population of one species or subspecies of wetland-dependent non-avian animal species.
Domestic Legal Conservation Framework in India
In India, wetlands are legally protected under the Wetlands (Conservation and Management) Rules, 2017, notified under the Environment (Protection) Act, 1986. Key legal features include:
- Decentralized Governance: Establishment of State Wetland Authorities (SWAs) in every state and UT, headed by the Environment Minister of the respective state.
- Prohibited Activities: Setting up of industries, expansion of existing industries, dumping of solid waste, discharge of untreated effluents, and conversion for non-wetland uses are strictly banned.
- Principle of Wise Use: Protection is balanced with sustainable utilization that maintains the ecological character of the ecosystem.
2. Montreux Record (Wetlands in Danger)
The Montreux Record is a register of wetland sites on the List of Ramsar wetlands where changes in ecological character have occurred, are occurring, or are likely to occur as a result of technological developments, pollution, or human interference.
- Currently in Montreux Record from India:
- 1. Keoladeo National Park (Rajasthan) — Placed on the Montreux Record due to water shortages resulting from upstream water diversion (Ajan Dam) and the rapid growth of the invasive grass species Paspalum distichum.
- 2. Loktak Lake (Manipur) – Famous for Phumdis (floating heterogeneous masses of vegetation, soil, and organic matter) and the endangered Sangai deer (Dancing Deer / Rucervus eldii eldii). Placed under Montreux Record due to hydrological alterations caused by the construction of the Ithai Barrage, siltation, and deforestation in the catchment area.
- Note: Chilika Lake (Odisha) was placed on the Montreux Record in 1993 due to siltation and choking of the sea mouth, but was successfully removed from the Montreux Record in 2002 following effective eco-restoration by the Chilika Development Authority (CDA), earning the prestigious Ramsar Wetland Conservation Award.
3. State-Wise Master Analysis of India’s Ramsar Sites
India currently possesses the largest network of Ramsar sites in South Asia. Below is the ultimate high-yield comparative analysis of vital Ramsar sites grouped by key states, highlighting ecological parameters frequently tested in Civil Services examinations.
| State / UT | Key Ramsar Sites | River Basin / Ecosystem | Key Ecological & Faunal Highlight |
|---|---|---|---|
| Tamil Nadu (Highest count in India – 16 Sites) | Gulf of Mannar Biosphere Reserve, Point Calimere, Vedanthangal, Pichavaram Mangrove, Karikili, Pallikaranai Marsh | Coromandel Coast / Marine & Estuarine | Supports vulnerable Dugongs (Sea Cows), green sea turtles, and extensive mangrove ecosystems (Pichavaram). Vedanthangal is India’s oldest waterbird sanctuary. |
| Uttar Pradesh (10 Sites) | Upper Ganga River, Haiderpur Wetland, Bakhira Sanctuary, Nawabganj, Saandi, Samaspur, Sarsai Nawar, Sur Sarovar | Gangetic Alluvial Plain | Upper Ganga stretch (Brajghat to Narora) is critical for Gangetic Dolphins, Gharials, and Smooth-coated Otters. Sur Sarovar (Keetham Lake) is an artificial refuge. |
| Odisha | Chilika Lake, Bhitarkanika Mangroves, Satkosia Gorge, Tampara Lake, Hirakud Reservoir, Ansupa Lake | Mahanadi Basin / Coastal Lagoon | Chilika is India’s largest coastal lagoon, home to Irrawaddy Dolphins. Bhitarkanika harbors the world’s highest density of Saltwater Crocodiles and Olive Ridley nesting sites. |
| Kerala | Vembanad-Kol Wetland, Ashtamudi Wetland, Sasthamkotta Lake | Western Ghats Coastal Plain | Vembanad-Kol is the longest lake in India and the largest Ramsar site in South India. Famous for Kuttanad below-sea-level farming system (GIAHS site). |
| Jammu & Kashmir / Ladakh | Wular Lake, Hokersar, Surinsar-Mansar, Tso Moriri, Tso Kar Wetland Complex, Shalbugh, Hygam | Himalayan / Trans-Himalayan High Altitude | Wular is India’s largest freshwater lake (tectonic origin fed by Jhelum). Tso Kar is a hypersaline lake complex home to the Black-necked Crane and Asiatic Wild Ass (Kiang). |
| West Bengal | Sundarbans Wetland, East Calcutta Wetlands | Ganga-Brahmaputra Delta | Sundarbans is the largest Ramsar site in India, home to the Royal Bengal Tiger and Fishing Cat. East Calcutta Wetlands is a global model for natural urban sewage treatment. |
| Punjab | Harike Lake, Kanjli Wetland, Ropar Wetland, Beas Conservation Reserve, Keshopur-Miani, Nangal | Indus Basin (Sutlej, Beas confluence) | Beas Conservation Reserve is the only habitat of the endangered Indus River Dolphin in India. Harike is a man-made wetland at the confluence of Beas and Sutlej. |
| Rajasthan | Keoladeo National Park, Sambhar Salt Lake | Luni / Inland Drainage | Sambhar is India’s largest inland saline lake, crucial for breeding migratory Lesser and Greater Flamingos. Keoladeo is a UNESCO World Heritage Site. |
| Gujarat | Nalsarovar Bird Sanctuary, Thol Lake, Wadhvana Wetland, Khijadia Wildlife Sanctuary | Kathiawar Peninsula / Gulf of Kutch | Nalsarovar is a major stopover on the Central Asian Flyway. Khijadia is a coastal wetland with rich marine and freshwater habitat diversity. |
| Madhya Pradesh | Bhoj Wetland, Sakhya Sagar, Sirpur Wetland, Yashwant Sagar | Central Highland / Narmada-Chambal Basins | Bhoj Wetland consists of two human-made lakes (Upper and Lower Lake of Bhopal) constructed by Raja Bhoj in the 11th century. |
High-Yield Superlatives for UPSC Prelims 2026
- Largest Ramsar Site in India: Sundarbans Wetland, West Bengal (~4,230 sq km).
- Smallest Ramsar Site in India: Renuka Wetland, Himachal Pradesh (~0.2 sq km / 20 hectares).
- First Ramsar Sites Designated in India: Chilika Lake (Odisha) and Keoladeo National Park (Rajasthan), both designated in October 1981.
- State with Maximum Ramsar Sites: Tamil Nadu (16 sites), followed by Uttar Pradesh (10 sites).
3. Key Ramsar Sites of Maharashtra (MPSC & UPSC)
Maharashtra has three designated Ramsar sites of high ecological and historical importance, frequently featured in both UPSC CSE and MPSC Rajyaseva examinations:
| Wetland Name | District | Ecological Highlight |
|---|---|---|
| Nandur Madhameshwar | Nashik | First Ramsar site of Maharashtra; known as ‘Bharatpur of Maharashtra’. |
| Lonar Lake | Buldhana | Unique meteorite impact crater lake; hyper-saline and alkaline water. |
| Thane Creek Flamingo Sanctuary | Thane/Mumbai | Vital feeding ground for migratory Greater and Lesser Flamingos. |
In-Depth Micro-Analysis of Maharashtra Ramsar Sites
- Nandur Madhameshwar (Nashik): Formed at the confluence of the Godavari and Kadwa rivers following the construction of the Nandur Madhameshwar Weir. It hosts over 230 species of birds, including threatened species like the Indian Spotted Eagle, Greater Spotted Eagle, and White-rumped Vulture.
- Lonar Lake (Buldhana): Formed around 50,000 years ago during the Pleistocene Epoch by a meteorite impact in basaltic rock. The lake has no natural outlet and exhibits extreme endorheic chemical properties (pH levels above 10). It is inhabited by specialized haloarchaea microbes that turn the water pink under high salinity and light conditions.
- Thane Creek Flamingo Sanctuary (Thane/Mumbai): Located along the western bank of Thane Creek, it comprises dense mangrove forests, mudflats, and tidal network channels. It acts as an essential urban coastal refuge along the Central Asian Flyway (CAF), attracting over 1,500,000 birds annually, predominantly Greater and Lesser Flamingos.
4. Ecological & Strategic Significance of Indian Wetlands
Wetlands are often described as the “Kidneys of the Landscape” and “Biological Supermarkets”. From a UPSC Mains GS-III perspective, their critical ecological services can be classified into four primary pillars:
- Hydrological Regulation & Flood Mitigation: Wetlands act as natural sponges, absorbing excess floodwaters during monsoons, slowing down runoff, and steadily releasing water during lean seasons, thereby preventing severe downstream flooding and recharging groundwater aquifers.
- Blue Carbon Sequestration: Coastal wetlands such as mangroves, salt marshes, and seagrass beds sequester carbon dioxide from the atmosphere at rates up to 55 times faster than tropical rainforests, storing it in peaty soils for millennia.
- Water Purification & Nutrient Cycling: Wetland vegetation and microbial communities filter out heavy metals, trapped sediments, excess nitrogen, and phosphorus from agricultural and urban runoff.
- Biodiversity Refugia along Migratory Flyways: Indian wetlands are indispensable wintering habitats for millions of migratory waterfowl traveling along the Central Asian Flyway (CAF) and the East Asian–Australasian Flyway (EAAF).
5. Major Threats Facing Indian Ramsar Sites
Critical Mains Focus Area (GS Paper III): According to the National Wetland Decadal Change Atlas published by ISRO, nearly 30% of small wetlands in India have experienced severe spatial shrinking over the past two decades.
- Urban Encroachment & Land Reclamation: Unplanned real estate expansion, industrial zoning, and infrastructure construction draining wetlands (e.g., historical shrinking of Pallikaranai Marsh in Chennai and Deepor Beel in Assam).
- Agricultural Runoff & Eutrophication: Excessive usage of chemical fertilizers (NPK) leading to massive algal blooms, hypoxiation (dead zones), and loss of aquatic fauna.
- Hydrological Modifications & Dams: Upstream damming and water diversion altering natural silt loading and seasonal flushing mechanisms.
- Biological Invasions: Rapid spread of non-native invasive plant species such as Eichhornia crassipes (Water Hyacinth), Prosopis juliflora, and Ipomea carnea, choking indigenous flora and blocking sunlight.
6. Government Initiatives & Conservation Framework
To address ecological degradation, the Government of India has instituted targeted policy interventions:
- Amrit Dharohar Capacity Building Scheme: Announced in the Union Budget 2023–24, this flagship initiative aims to optimize the eco-tourism potential of Ramsar sites, enhance local livelihoods, increase carbon sequestration, and promote sustainable wetland management over a three-year implementation period.
- MISHTI Program:Mangrove Initiative for Shoreline Habitats & Tangible Incomes focuses on comprehensive mangrove afforestation along India’s coastline and wetland fringes using eco-restoration models.
- Save Wetlands Campaign: A nation-wide mass movement aimed at building community ownership, citizen science, and local conservation initiatives around Ramsar sites.
- National Plan for Conservation of Aquatic Eco-systems (NPCA): A single unified scheme implementing conservation interventions for both lakes and wetlands on a 60:40 cost-sharing pattern between Central and State governments.
7. Exam Syllabus Overlaps (UPSC GS-III & Prelims Integration)
Mastering Ramsar sites provides direct cross-substantive advantages across multiple papers in the Civil Services Examination:
| Exam Stage | Syllabus Topic | Typical Question Framework |
|---|---|---|
| UPSC Prelims | GS Paper I: General Issues on Environmental Ecology, Bio-diversity and Climate Change | Matching wetland names with rivers/mountains, Montreux Record status, Ramsar criteria, endemic flagship animal linkages (e.g., Sangai, Irrawaddy Dolphin). |
| UPSC Mains | GS Paper III: Environment Conservation, Environmental Impact Assessment, Disaster Management | Evaluating wetland degradation causes, community-led wise-use models, role of wetlands in climate change adaptation and flood mitigation. |
| State PSCs (MPSC) | GS Paper I & Paper IV: Geography & Ecology of Maharashtra | Direct questions on Maharashtra’s 3 Ramsar sites, district mappings, local biodiversity conservation projects, and Western Ghats eco-sensitive zones. |
8. Step-by-Step Practical Preparation Roadmap for Aspirants
To retain complex state-wise data and achieve high scoring efficiency, adopt this structured 3-phase revision framework:
- Phase 1: Spatial Mapping & Basin Grouping (Days 1–3)
Plot all 80+ Ramsar sites on a blank physical wall map of India. Group them spatially by river basins:- Indus Basin (Punjab, J&K, Himachal, Ladakh)
- Ganga-Brahmaputra Basin (UP, Bihar, West Bengal, Assam, Manipur)
- Peninsular Coastal Lagoons (Odisha, Andhra Pradesh, Tamil Nadu, Kerala)
- Phase 2: Flagship Species & Threat Tagging (Days 4–5)
Create two-column flashcards connecting each Ramsar site to its key ecological fauna:- Chilika $\rightarrow$ Irrawaddy Dolphin & Green Sea Turtle
- Loktak $\rightarrow$ Sangai Deer & Phumdis
- Keoladeo $\rightarrow$ Siberian Crane (historically) & Invasive Paspalum grass
- Sundarbans $\rightarrow$ Royal Bengal Tiger & Fishing Cat
- Phase 3: Legal & Policy Matrix Revision (Day 6)
Revise the Ramsar 9 criteria, Montreux Record current listing, Wetlands Rules 2017 prohibitions, and recent government schemes (Amrit Dharohar & MISHTI).
9. High-Yield Revision Checklist & Practice Questions
5-Minute Rapid Revision Checklist
- [ ] Ramsar Convention signed in 1971 (Iran); came into force in 1975; India signed in 1982.
- [ ] Montreux Record currently includes Keoladeo NP and Loktak Lake (Chilika removed in 2002).
- [ ] Tamil Nadu has the highest count of Ramsar sites in India (16 sites).
- [ ] Largest site = Sundarbans; Smallest site = Renuka Wetland.
- [ ] Maharashtra Ramsar Sites = Nandur Madhameshwar, Lonar Lake, Thane Creek.
UPSC Prelims Practice MCQs
Q1. Consider the following pairs of Ramsar Sites and their naturally associated rivers/water bodies:
- Harike Wetlands — Confluence of Beas and Sutlej
- Keoladeo National Park — Confluence of Banas and Chambal
- Nandur Madhameshwar — Confluence of Godavari and Kadwa
Which of the pairs given above is/are correctly matched?
- (a) 1 and 2 only
- (b) 2 and 3 only
- (c) 1 and 3 only
- (d) 1, 2 and 3
Correct Answer:(c) 1 and 3 only
Explanation: Harike Wetland is situated at the confluence of Beas and Sutlej rivers in Punjab. Nandur Madhameshwar is located at the confluence of Godavari and Kadwa rivers in Maharashtra. Keoladeo National Park lies at the confluence of the Gambhir and Banganga rivers (not Banas and Chambal).
Q2. With reference to the ‘Montreux Record’, consider the following statements:
- It is a register of wetland sites on the List of Ramsar wetlands where changes in ecological character have occurred or are likely to occur.
- Currently, Chilika Lake and Loktak Lake are the only two Indian sites included in the Montreux Record.
Which of the statements given above is/are correct?
- (a) 1 only
- (b) 2 only
- (c) Both 1 and 2
- (d) Neither 1 nor 2
Correct Answer:(a) 1 only
Explanation: Statement 1 is correct. Statement 2 is incorrect because Chilika Lake was removed from the Montreux Record in 2002. Currently, the two Indian sites on the Montreux Record are Keoladeo National Park (Rajasthan) and Loktak Lake (Manipur).