Lake Restoration

Nanneer- Restoration of Naganthagal Eri, Pothur

In 2022, the Pitchandikulam forest consultants undertook a significant restoration project at Naganthagal Eri, situated in Upparapalayam village, Pothur Panchayat. This lake had played a crucial role in the past by serving as a vital groundwater reservoir and providing safe drinking water to the community. Unfortunately, due to neglect, it had become filled with silt and overrun with weeds, losing its ability to hold water. The lake’s location on the outskirts of Chennai, just above the Puzhal Lake, made it an essential water body for water conveyance and urban flood prevention during the monsoon seasons.

The restoration project, carried out in partnership with Pothur Panchayat and funded by Tata Communications limited, was aptly named “Nanneer,” which translates to “good/safe water.” Before commencing the restoration work, the Pitchandikulam team conducted a thorough biodiversity survey to identify the fauna and flora in the area. This step was crucial to reintroduce the native species that once thrived there. Subsequently, a well-planned land shaping strategy was designed for the 15.01-acre lake, incorporating features such as platforms, an island, and two small hills with walking tracks.

The land shaping phase involved careful excavation and desilting of the lake. The excavated silt and soil were then utilized to create hills, islands, and bunds, contributing to the revitalization of the lake’s ecosystem. Over five thousand plants of native species were thoughtfully planted on the bunds, platforms, island, and hills within the desilted lake area. An encouraging aspect was the involvement of TCL employees, who volunteered in the plantation work, this helped promoting awareness about water conservation and the significance of planting indigenous flora to IT urban people.

 To ensure the protection of the newly planted vegetation from cattle and other threats, the site was securely fenced. Additionally, essential infrastructure, including water facilities, toilets, huts, and seating benches, were constructed to facilitate visitors’ access and comfort.

As part of the project’s broader vision, a dedicated “Blue Green Center” (BGC) was established at the site. The BGC serves as a hub for environmental education programs, catering to school students, local youth, and anyone interested in environmental conservation. Building upon TCL’s existing support for environmental education in Chennai schools through the “School in Action” initiative, where students learned about indigenous flora and fauna at Adyar Poonga (Tholkappiar Poonga) restored by Pitchandikulam Forest in 2007, this program extended to the Nanneer site. Local students in the vicinity are invited to the BGC for enlightening environmental education experiences.

The culmination of the project saw the inauguration of the BGC by the Tiruvallur collector, with the project officially handed over to the district government, as the lake fell under their jurisdiction. The

project’s success was acknowledged through a prestigious TCL award and favorable outcomes in the biodiversity survey and Environmental Impact Assessment, reaffirming the positive impact of the restoration efforts.

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Nadukuppam water retention landscape

The Kaluveli watershed area is 750 sq. kms which has 200 inter-connected eris (man-made water catchments) that drain into the Kaluveli flood plain.  The area also has five sacred groves and two reserve forests. Pitchandikulam established the Kaluveli Environment Education Trust (KEET) in 2005 based at Nadukuppam (45 km north of Pondicherry, Tamil Nadu) on a 35-acre site which was an environmental disaster. The land has been restored due to the plantation of the indigenous forest type. The Nadukuppam Forest is home to some 35,000 plants (trees, shrubs, ground covers) which have been planted over 17 years and include 300 species of coastal flora. It is a model surface rainwater retention landscape where 23 ponds have been created to harvest and store the rain for irrigation and water table replenishment. An extensive nursery raises and sells indigenous coastal forest plants. Nadukuppam also has an environment center which reaches out to surrounding schools. Women’s empowerment is taken care of through women’s self-help groups who are trained in making herbal products.

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Payanur [P72]

In 2010 a comprehensive eco restoration plan was executed on 72 acres of land for the Chettinad company. Thirty acres of water bodies were created, and several hills formed to the height of 28 meters. The entire site was planted with predominantly indigenous species and extensive landscaping, walkways, bridges were created.

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Restoration of twin lake, Siruseri

The year 2015 was a time of reckoning for the coastal region of Tamil Nadu. On December 1st the region experienced the highest amount of rainfall in 100 years where over 400 people died, nearly 2 million people were displaced and losses amounting to 300 crores were incurred. There was serious need to take stock of situation and carry out immediate measures. TCS, Indian Institute technology of Madras and Pitchandikulam forest consultant got together to do the needful towards the positive rejuvenation of the environment.

The Siruseri water catchment area of which SIPCOT campus is located was identified as critical to the flooding of southern Chennai. A detailed hydrogeology survey of this area was carried out by IIT Madras. It came up with valuable recommendations to be implemented in the Siruseri water catchment to prevent future floods and to improve water management in the region.


This was to be executed in 2 phases; first the encroachment would be removed, and drainage channels cleared, secondly the storage capacity of the Siruseri twin lakes would be improved. IIT also recommended an eco-park and knowledge center in the area. This would help in sharing the experiences and lessons learned from the desilting and restoring the lake and channel systems. Such a center also enables demonstration of sustainable practices and would encourage an environmental planning conversation to happen between all the local stake holders.

PFC’s holistic vision included ecological and social factors. It puts together a replicable model of eco restoration that included in the age old system of 100’s of cascading lakes to west of Chennai. This would reduce the impact of flooding and also recharge the aquifers so that Chennai could have sufficient water in the summer months.

The plan included the transformation into a vibrant eco system of the degraded reserve forests above the Periya eri and Sitheri, which are infested with invasive exotic tree species. The forest area which is heavily eroded needs to be restored by the creation of water retention landscapes.

Awareness programs were conducted among the locals to gather their visions for Siruseri.

The conceptual plan of PFC also included provision for bunds, hills, platforms, islands and a site for the eco knowledge center.

The land development work of the Periya eri began on 17 December of 2018. In Sitheri the land formation work reached completion before the rains of 2019. More than 6,000 trees and shrubs of 60 indigenous species were planted during the last months of 2019. After over 35,000 machinery hours over 12,500 man hours and countless hours of design and creativity the twin lakes began to breathe again.

It feels positive that green blue energy is returning to an area that some 17 years ago was rural farm land but which was then transformed into an urban and industrial landscape. Hopefully with enlightened direction, SIPCOT and its surrounds can be a green model of how technological parks can be created.


Since the completion of the project in December 2019 Pitchandikulam has continued to maintain and develop the 100acre lake site. We now have a formal contract with SIPCOT to execute the maintenance and further plantations.



Alambara Resorts

Alambara Resorts, the property of TT Groups, on the Yedayanthittu estuary near Kadapakkam
combined landscaping and planting an area of 40 acres.

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Mugaiyur Eco-park


In 2006 Pitchandikulam began the transformation of an eroded, overgrazed 88 acre site at Mugaiyur into a thriving Eco-park. The natural coastal sand dune ecosystem has been restored and a Tropical Dry Evergreen Forest (TDEF) established to create a matrix of habitats that can support a greater range of wildlife.


Adyar Eco Park,Chennai

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Pitchandikulam Forest Consultants are the lead consultants in the ecological restoration of 58-acres of the Adyar Creek estuary in Chennai. The ecological restoration has created will result in an eco-park that is a showcase ecosystem of the Coromandel Coast with fresh water ponds, brackish areas, mangroves, mud flats, dunes, and islands. The information centre provides an educational focus to the park and is a place where children can come to watch the Creek’s birds, turtles, reptiles and other animals. One of the highlights of the eco-park is the presence of water bodies surrounded by typical vegetation found in a Tropical Dry Evergreen Forest.

The Adyar wetland reserve is a significant link for birds on their great annual migrations, particularly the wading birds who feed on the coastal mudflats. Historically, approximately 200 species of migratory birds visited the Adyar Creek region but many are now on the endangered International Union for Conservation of Nature Red List. The restoration of this wetland will encourage many of these species to return.

The fascinating ecology of the estuary includes mangroves and many creatures from mud skippers and crabs, to dragon like monitor lizards. Restoring these mangroves and estuarine vegetation will function as an important fish breeding habitat, provide a natural barrier against cyclones and storms, and play a major role in the cleaning of the Adyar river.

The park educates visitors through a working model of an environmentally sustainable building demonstrating water collection, conservation and treatment, energy efficient alternatives such as solar, bio-gas and wind, waste management techniques as well as showing options for eco-friendly building materials. The use of non-conventional energy is demonstrated in a practical way for visitors, especially children to see how energy is produced by sunlight, wind and bio-mass. The bioresource centre illustrates the uses of plants and their relationship to human kind through an interesting and fun display.

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