Chilika Lake

Chilika Lake
Name	Chilika Lake
Location	Odisha, India
Type	Brackish water lagoon
Outflow	Bay of Bengal
Basin countries	India
Area	~1,100–1,200 km² (seasonal)
Depth	1–4 m (mean)
Islands	Rajhans, Nalabana, Kalijai
Coordinates	19°44′N 85°26′E

Chilika Lake Chilika Lake is a large brackish water lagoon on the eastern coast of India, situated in Odisha along the northern shore of the Bay of Bengal. It functions as an ecotone between freshwater riverine systems and marine environments, supporting a mosaic of habitats and serving as a critical stopover for migratory birds and a nursery for estuarine fish species. The lagoon’s management involves multiple stakeholders including state agencies, international conservation organizations, and local fishing communities.

Geography and Hydrology

The lagoon occupies a coastal plain in Khordha district, Puri district, and Ganjam district, receiving inflows from rivers such as the Daya River, Bhargavi River, and Kuanria River and discharging into the Bay of Bengal through a dynamic inlet at Dhamra. Seasonal monsoon pulses driven by the Indian Ocean monsoon and tidal forcing from the Bay of Bengal create spatially and temporally variable salinity gradients, influencing water column stratification and suspended sediment transport. The basin’s bathymetry ranges from shallow marshes and reed beds to deeper central basins near Satpada and Balugaon, with several islands including Nalabana Island, Kalijai Island, and Rajhans Island that are important for nesting waterbirds. The lagoon’s morphology has been altered by anthropogenic interventions by agencies such as the Odisha Forest Department and engineering works associated with the Department of Fisheries, Odisha.

Ecology and Biodiversity

Chilika supports diverse assemblages across mangrove, mudflat, seagrass, and open-water habitats, hosting species documented by institutions like the Zoological Survey of India and the Bombay Natural History Society. Vegetation zones include mangroves dominated by genera such as Avicennia and Rhizophora, and seagrasses that provide forage for Dugong dugon and juvenile Penaeus monodon populations. The lake is internationally recognized under the Ramsar Convention as a wetland of importance and is designated a Ramsar site; it is also listed as an Important Bird Area by BirdLife International. Migratory pathways link the lagoon to flyways documented by the Convention on Migratory Species and species records from observers associated with the Wetlands International network. Notable fauna include significant populations of Greater flamingo, Siberian crane (historical records), Irrawaddy dolphin populations observed near Rajahmundry corridors, and numerous resident fishes, crustaceans, and benthic invertebrates cataloged in surveys led by the Central Inland Fisheries Research Institute.

History and Cultural Significance

The lagoon has been intertwined with the history and culture of Kalinga and later regional polities, featuring in local chronicles and pilgrimages to shrines such as the temple on Kalijai Island. Coastal trade along the Bay of Bengal connected communities around the lagoon to ports like Chandabali and Balasore, and travelers described the lagoon in accounts by colonial administrators of the British East India Company. Rituals associated with festivals celebrated in Puri and village-level observances reflect long-standing maritime traditions. Scholarly work by historians at institutions such as Utkal University and the Archaeological Survey of India links changing shoreline dynamics to human settlement patterns and salt-making activities recorded in district gazetteers.

Economic Uses and Fisheries

Chilika’s fisheries underpin livelihoods for thousands of fishers organized in cooperatives and registered with the Odisha State Fishermen Cooperative Federation Limited. Commercial catches include shrimp, mullet, and indigenous carp species harvested using traditional craft from village clusters near Satpada, Bramhapur, and Baliyatra. Aquaculture ventures and salt pans in peripheral zones have been promoted by state initiatives implemented through the Department of Agriculture and Farmers’ Empowerment, Odisha and private enterprises. Market chains channel produce to regional trading hubs such as Cuttack, Bhubaneswar, and Kolkata, linking to national seafood exporters regulated by agencies including the Marine Products Export Development Authority.

Conservation, Management, and Threats

Conservation actions involve integrated management plans developed by the Chilika Development Authority in collaboration with international partners like the International Union for Conservation of Nature and the World Bank. Interventions such as dredging of the inlet to improve salinity exchange were implemented following environmental assessments by institutes including the National Institute of Oceanography (India). Ongoing threats include siltation from catchments modified by projects of the Odisha State Highway Authority, eutrophication linked to agricultural runoff from Mahanadi tributaries, encroachment by aquaculture, and bycatch pressures from mechanized fleets registered with the Directorate of Fisheries, Odisha. Climate-driven sea level rise and extreme events associated with cyclones such as Cyclone Phailin and Cyclone Fani pose additional risks to hydrodynamics and habitat integrity.

Tourism and Recreation

Tourism centered on birdwatching, dolphin sightseeing, and cultural visits to temples on islands has expanded through initiatives by Odisha Tourism and local tour operators based in Chilika Development Authority-recognized hubs like Satpada Jetty and Mangalajodi. Eco-tourism projects have been piloted with partnerships involving UNESCO-linked programmes and NGOs such as the Wildlife Trust of India to promote community-based homestays, guided birding trails, and interpretive centers. Recreational boating, photography expeditions, and seasonal festivals attract visitors from Bhubaneswar, Kolkata, and international birding circuits promoted by organizations like the Royal Society for the Protection of Birds.

Category:Lakes of India Category:Protected areas of Odisha