‘From Degradation to Regeneration’
Like many rapidly urbanizing Indian cities, Chennai has witnessed extensive loss and degradation of its natural green cover over the past three decades. During this period, the city’s built-up area is estimated to have increased from nearly 48% to over 74%, steadily replacing forests, scrublands, wetlands and open landscapes that once acted as natural green lungs. This large-scale transformation has accelerated land degradation, increased the risk of desertification, intensifying climate risks such as extreme rainfall, urban flooding, droughts, aquifer depletion and urban heat island effects. Among the most critical ecological systems of the Chennai region are its native biomes—forests and scrublands, grasslands, hillocks, and coastal landscapes which sustain regional hydrology, biodiversity, livelihoods, and climate resilience. However, due to rapid and haphazard urbanization, these biomes are increasingly deteriorating and fragmented, making it imperative to preserve and revive them within urban environments.
The 16.9-acre Biodiversity and Climate Park was developed by Chennai Metropolitan Development Authority to repurpose the open space reserve adjoining Chennai’s newly built mofussil bus terminus in Kilambakkam. The site had become heavily degraded due to large-scale construction and continuous solid waste dumping. The vision for the park is to transform this barren degraded land into a thriving socio-ecological amenity that restores degraded landscapes and lost hydro-ecological linkages, while functioning as vital green infrastructure benefiting terminal users and underserved peri-urban communities.
The transformation of the site was achieved through four key steps, beginning with the regeneration of degraded land through large-scale debris removal, strategic grading, and soil amendment techniques. Following site regeneration, the park is shaped through three core strategies. Strategy 1: ‘Stormwater management inspired by the traditional ‘Eri’ systems of the region’ integrates a cascading network of blue-green infrastructure including bioswales, infiltration basins, and retention ponds that sequentially manages 85% of stormwater runoff generated on site, supports flood mitigation, enables groundwater recharge, and allows water reuse for irrigation. Strategy 2: ‘Ecological rejuvenation through strategic native planting and habitat creation’ introduces four themed biomes: forests and scrublands, grasslands, hillocks, and coastal landscapes through over 4 lakh sq.ft of native vegetation, including 2,500 tree saplings and extensive shrub planting, establishing one of the largest green lungs in peri-urban Chennai. Strategy 3: ‘Community engagement through themed interpretation and recreation’ transforms the park into an immersive interpretive trail that builds awareness of climate change, ecology, and nature-based solutions through a comprehensive wayfinding, signage, and interpretation strategy guiding visitors across the park’s four zones. The zones integrate native landscapes, recreational amenities, public art, and interpretive elements to position the park as a living laboratory for climate awareness and environmental stewardship.
Designed for inclusivity and universal accessibility, the park serves diverse community stakeholders, including over 30,000 daily commuters accessing the bus terminal and caters to 500,000 to 800,000 residents in peri-urban communities. Today, the park caters to nearly 600,000 visitors annually and has emerged as one of the largest public open space amenities in peri-urban Chennai. As India’s first climate change awareness-themed park, it demonstrates how integrated socio-ecological infrastructure can restore degraded landscapes while creating educational, inclusive and resilient public spaces for rapidly urbanizing cities.
