Sukhna Wildlife Sanctuary's Leopard Return Marks a Stunning Ecological Triumph
Nestled within the fragile Shivalik Hills near Chandigarh's iconic Sukhna Lake, the Sukhna Wildlife Sanctuary stands as a remarkable testament to ecological revival. Spanning approximately 26 square kilometers (2,600 hectares), this protected area was initially established to combat severe siltation threatening the lake but has since blossomed into a vibrant sanctuary teeming with diverse flora and fauna. The recent confirmation of leopards thriving here marks a pivotal milestone in one of India's most extraordinary environmental comebacks.
Definitive Proof of Leopard Settlement
Camera traps deployed during a collaborative wildlife survey have captured clear images of these elusive predators, providing undeniable evidence of their permanent residence. UT Chief Conservator of Forest (CCF) Saurabh Kumar emphasized, "There is definitive proof that leopards have established the sanctuary as their permanent home now. Earlier, leopards would occasionally cross over from neighbouring forested areas for some time and then return to their permanent territory." The motion-triggered cameras recorded at least two leopards in the Kansal range, with officials suggesting the presence of at least one female. Follow-up field inspections in December 2025 revealed fresh pug marks and widespread activity across multiple sites, confirming active movement throughout the protected area.
For forest officials, these sightings transcend mere wildlife encounters. Kumar highlighted, "The establishment of leopards at the top of the food chain is a resounding validation that the ecosystem has matured into a near-natural, self-sustaining forest capable of supporting apex predators." This achievement underscores the triumph of long-term conservation efforts, transforming a once-eroded landscape into a resilient habitat.
From Barren Slopes to Thriving Sanctuary: A Historical Journey
Sukhna Lake was created in 1958 by damming the Sukhna Choe, a seasonal stream, as part of Le Corbusier's visionary plan for Chandigarh. Designed to collect runoff from the hills, the lake soon faced a grave threat: rapid siltation from severe soil erosion on denuded Shivalik slopes. With an initial storage capacity of 1,074 million cubic meters and a water spread of 1.52 to 2.28 square kilometers, the lake drew from a 4,207-hectare catchment of hilly and agricultural land.
However, the ecologically fragile Shivaliks, prone to erosion during monsoons, caused siltation rates exceeding 150 tons per hectare per year in some areas. By 1988, an estimated 66% of the lake's original capacity had been lost to sediment buildup, endangering this man-made masterpiece. In the 1960s, the Punjab government (later vested with Chandigarh UT) acquired 25.42 square kilometers of the critical hilly catchment for soil and moisture conservation.
Subhash Chawla, a former mayor and original inhabitant of a village predating Chandigarh, recalled, "There were small hamlets in this area. There were many wells but no water, as all the wells were completely dried up. There was no water and fodder for domestic animals. The land was very stony and there was no farming in the area." When the erstwhile Punjab government decided to acquire this area in 1962, residents were rehabilitated without resentment.
Intensive Restoration Efforts and Challenges
The UT forest department launched intensive measures, blending vegetative and engineering interventions. These included extensive afforestation, slope stabilization structures, and erosion control, which dramatically reduced siltation to just 3-5 tons per hectare per year. Barren, gully-scarred landscapes—once devoid of vegetation, water, or fodder—were transformed through sustained tree planting and ameliorative forestry.
Early challenges included the vast catchment size, initial high erosion, deep gullies, and landslides, delaying major impacts until after 1966. Kumar noted, "Yet, synergistic approaches—mechanical structures aiding plant establishment and vegetation reinforcing—proved effective. Hardy local species like Saccharum munja (kana) and Saccharum spontaneum (kahi) naturally colonised drainage lines, binding soil robustly." The administration formally notified the area as Sukhna Wildlife Sanctuary on March 6, 1998.
Crisis and Ecological Restoration Milestones
From its inception, the lake faced severe siltation due to soil erosion from the unstable Shivalik Hills. Key milestones include:
- Silt Accumulation: By 1974, approximately 63% of the lake's storage capacity was filled with silt. Between 1958 and 1988, it lost about 66% of its original water-holding capacity.
- 1974 Diversion: To minimize silt entry, Sukhna Choe was diverted in 1974 to bypass the lake entirely, with water entering through three siltation pots.
- Shramdan (Voluntary Labour): In 1988, a major public effort began, with Chandigarh residents providing voluntary manual labor to desilt the lake bed.
- Wildlife Sanctuary Formation: Massive afforestation and soil conservation efforts led to the creation of the Sukhna Wildlife Sanctuary in March 1998.
Recognition and Legal Status
In recent years, the lake's status has evolved significantly:
- National Wetland: The Government of India has designated Sukhna Lake as a protected National wetland.
- Living Entity: In 2020, the Punjab and Haryana High Court declared Sukhna Lake a "living entity" or "legal person," granting it rights, duties, and liabilities, with Chandigarh citizens as loco parentis.
- Eco-Sensitive Zone: An area of 2 km to 2.75 km around the lake is designated as an eco-sensitive zone, where new construction is strictly banned to protect the ecosystem.
A Maturing Ecosystem and Symbol of Resilience
The sanctuary now teems with biodiversity, hosting among the region's highest concentrations of sambar deer, along with chital, wild boar, jackals, jungle cats, porcupines, langurs, and over 150 bird species. The recent arrival and apparent settling of leopards crown this food pyramid, demonstrating how patient, science-driven conservation has reversed degradation in a once-fragile catchment.
Officials view the leopard's return not just as a wildlife milestone but as living proof that a man-made forest landscape—initially engineered to protect an urban lake—has evolved into a balanced, resilient wilderness. Positioned near a bustling city yet safeguarding natural processes, the Sukhna Wildlife Sanctuary serves as both Chandigarh's vital ecological buffer for Sukhna Lake and a powerful testament to the potential of sustained intervention to heal and regenerate the environment.
Flora and Fauna Diversity
The sanctuary boasts a wide variety of trees, shrubs, herbs, grasses, and climbers. Prominent flora includes Acacia catechu (Khair), Dalbergia sisoo (Shisham), Azadirachta indica (Neem), and many others. Fauna encompasses mammals like leopards, sambar, spotted deer, pangolins, wild boar, and over 262 bird species, along with reptiles such as cobras and pythons, and abundant insects like butterflies and honey-bees.
Tourism Potential and Trek Routes
To promote eco-tourism, nature trails and trek routes have been created throughout the sanctuary. There are eight designated trek routes, ranging from 2.5 km to 9 km, offering visitors immersive experiences in this revitalized wilderness.
Chandigarh's Green Cover Growth
Over the years, Chandigarh's green cover has shown significant improvement, with forest cover increasing from 7 square kilometers in 1997 to 25 square kilometers in 2023, reflecting the broader success of environmental initiatives in the region.
