Revitalizing Urban Water Bodies: Strategies for Sustainable Management

Cities across the country are losing their lifelines, one pond at a time. Lakes that once supplied drinking water, recharged groundwater, and cooled neighbourhoods are now reduced to garbage-filled depressions or vanished entirely under concrete. Reviving these urban water bodies is no longer just an environmental concern; it is a question of survival for cities battling floods, heatwaves, and dwindling water tables. Strategies for their revitalisation combine science, governance, community participation, and legal vigilance.

Why urban water bodies are disappearing 🔗

Urbanisation has been brutal on lakes, ponds, tanks, and wetlands. Rapid population growth, unplanned construction, encroachment, sewage discharge, and the disconnect between communities and their water heritage have together shrunk the urban waterscape. Water bodies that historically functioned as flood buffers and groundwater recharge zones have been reduced to dumping grounds or paved over for housing and roads.

Delhi: a case study in decline 🔗

Delhi is perhaps the clearest example of how a city can suffocate its own water resources. According to studies on the National Capital Region, only about 450 water bodies survive out of the 1,040 originally listed by the Delhi Parks and Gardens Society, with the remaining 590 either polluted, dried up, or encroached upon. The Najafgarh Lake, which once covered more than 300 sq. km in the 1960s and was a biodiversity hotspot, now stands as a topographical depression brimming with overgrown grass and garbage.

The story is similar for the historic Hauz Khas Lake, a 700-year-old water body that lay dry for decades before the Indian National Trust for Art and Cultural Heritage (INTACH) and the Delhi Development Authority (DDA) undertook a project to revive it using treated sewage water. Old stepwells across the city, once vital community resources, have been reduced to heaps of rubble. The reasons mirror those in other Indian metros: loss of watershed, deteriorating water balance, illegal constructions, and a complete lack of groundwater recharge planning.

Key drivers behind water body shrinkage 🔗

Understanding the decline requires looking at several overlapping pressures that have acted on urban water bodies over decades.

Encroachment and land conversion 🔗

Real estate pressure in expanding cities has been one of the biggest culprits. Lake beds and floodplains are often reclassified as developable land, with builders, slum dwellers, and even government agencies encroaching upon them. Once a lake bed is built upon, restoration becomes nearly impossible without legal battles and rehabilitation costs.

Pollution from sewage and solid waste 🔗

Most urban water bodies receive untreated sewage directly through municipal drains. Solid waste dumping, religious offerings, idol immersions, and industrial effluents further degrade water quality. The Bhoj Wetland in Bhopal, for instance, suffered for years from substantial population growth that put increased pressure on water resources, leading to deterioration in quality.

Loss of catchment and recharge zones 🔗

A water body cannot survive without its catchment. When the surrounding land is paved over with roads, parking lots, and buildings, rainwater no longer flows into the lake. Reforestation, in contrast, exerts considerable control on hydrological cycles and helps restore ecological balance, which is why catchment-area treatment is now central to most revival plans.

Restoration efforts and Special Purpose Vehicles 🔗

Recognising that conventional government departments often lack the technical and financial flexibility to manage complex water bodies, India has experimented with Special Purpose Vehicles (SPVs) dedicated to specific wetlands. Two pioneering examples stand out.

The Bhoj Wetland Authority 🔗

The Bhoj Wetland in Bhopal, comprising the Upper and Lower Lakes, was a centuries-old water source built by King Bhoj that had degraded badly by the late twentieth century. The Government of Madhya Pradesh launched a large-scale integrated conservation and management plan in 1995, completed in 2005 with financial assistance from the Japan Bank for International Cooperation (JBIC), and subsequently constituted the Lake Conservation Authority of Madhya Pradesh in 2004.

The project was remarkable for its scale and scope. According to documentation by international water bodies, the restoration involved diversion and treatment of 56 MLD of domestic sewage, a 4% increase in lake storage capacity, and removal of 1,022 hectares of shoreline weeds along with 101,351 tons of submerged weeds. The Upper and Lower Lakes were designated as a Ramsar site of international importance in 2002, recognising the success of these interventions.

The Chilika Development Authority 🔗

Odisha’s Chilika Lake, Asia’s largest brackish water lagoon, faced a different crisis: siltation choked its mouth, salinity collapsed, fish stocks vanished, and the lake was placed on the Montreux Record of threatened wetlands in 1993. The Chilika Development Authority (CDA) was created under Odisha’s Forest, Environment & Climate Change Department in 1991 with the objective of conserving the lagoon’s ecology and bringing about multi-dimensional development around it.

The CDA’s approach combined engineering with community participation. A new sea mouth was opened in 2000, restoring tidal flow and salinity balance, and the lake was removed from the Montreux Record in 2002, becoming the first site in Asia to achieve this feat. The CDA was awarded the Ramsar Wetland Conservation Award in November 2002 for outstanding achievements in restoration and the wise use of wetlands, alongside effective participation of local communities. The model is now studied globally for its blend of science, livelihood protection, and ecosystem management.

What SPVs do differently 🔗

Both authorities operate outside the rigid hierarchy of regular government departments. They can hire scientists, collaborate with international institutions, raise loans, and engage directly with fishing communities and local NGOs. This flexibility has proved essential because lake restoration is rarely a one-time engineering job; it requires continuous monitoring, adaptive management, and stakeholder coordination over decades.

The role of policy and the judiciary 🔗

Without a strong legal and policy backbone, even the best technical interventions fail. India’s framework for water body protection has evolved through national policies, environmental rules, and a series of landmark court rulings.

The National Water Policy 🔗

The National Water Policy, most recently revised in 2012, recognises water as a scarce natural resource and stresses conservation, equitable distribution, and ecosystem-based management of water bodies. The policy specifically calls for the protection of wetlands and recharge zones from encroachment and pollution, and for the integration of urban water management with land-use planning. While the policy itself is not legally binding, it informs how state governments draft their own water rules and how funds are allocated for restoration.

The Wetlands Rules, 2017 🔗

The Wetlands (Conservation and Management) Rules, 2017, notified under the Environment (Protection) Act, 1986, form the core regulatory framework for wetlands. The rules restrict activities such as solid waste dumping, discharge of untreated waste, and reclamation, and they mandate the constitution of State Wetland Authorities to identify, demarcate, and manage wetlands.

Landmark judicial interventions 🔗

The judiciary has played a remarkably active role in pushing governments to act. In the M. K. Balakrishnan & Others Vs Union of India case in 2017, the Supreme Court directed the central government to notify the Wetlands Rules and noted that 2,01,503 wetlands had been mapped at 1:50,000 scale, requiring brief documents on each to be obtained from state governments.

More recently, the Supreme Court has expanded protection further. In a 2024 ruling, the apex court ordered the protection of approximately 30,000 additional wetlands and mandated that states and Union Territories complete the demarcation and ground-truthing of these wetlands within three months. The National Green Tribunal has issued numerous orders on specific water bodies, from the Hasanpur-Lodha wetland in Uttar Pradesh to the Nayar river in Uttarakhand, often after PILs filed by environmental groups or concerned citizens.

Strategies for sustainable management 🔗

Drawing from the experience of Bhoj, Chilika, and dozens of smaller projects, a set of common principles has emerged for revitalising urban water bodies sustainably.

Integrated catchment management 🔗

A lake cannot be saved in isolation. Restoration plans must include afforestation in the catchment, check dams to slow runoff, silt traps, and protection of feeder channels. The Bhoj Wetland project, for instance, included catchment area treatment through afforestation, construction of check dams and silt traps, sewerage schemes, and shoreline management as part of an integrated 14-sub-project plan.

Sewage interception and treatment 🔗

Cutting off the inflow of untreated sewage is non-negotiable. This involves building interceptor drains, constructing sewage treatment plants, and reusing treated water for the lake itself, as was attempted at Hauz Khas with treated sewage water.

Community participation and livelihoods 🔗

Both Chilika and Bhoj demonstrated that conservation succeeds only when communities have a stake in it. At Chilika, the basic approach involved facilitating community-based co-management for integrated terrestrial and aquatic resource management, with emphasis on capacity building at the village level. Fishermen at Mangalajodi, once poachers, became guides and conservation watchers.

Scientific monitoring and adaptive management 🔗

Continuous monitoring of water quality, biodiversity, and hydrology allows managers to course-correct. Tools such as the Ecosystem Health Report Card developed for Chilika in collaboration with the University of Maryland and the National Centre for Sustainable Coastal Management offer a quantitative way to track progress and identify emerging threats.

Legal demarcation and enforcement 🔗

Without clear boundaries, encroachment continues. Recent Supreme Court orders requiring states to demarcate and ground-truth wetlands within fixed timelines aim to plug this gap. Cities like Bengaluru and Chennai are already battling rampant encroachment, and the Madras High Court has even directed Tamil Nadu to maintain a dedicated website with details of all water bodies.

The road ahead 🔗

Reviving urban water bodies is one of the most cost-effective climate adaptation strategies available. Restored lakes reduce urban flooding, lower temperatures, recharge groundwater, support biodiversity, and offer recreational and cultural spaces. The challenge is no longer ignorance of these benefits; it is implementation. Funds are scarce, coordination across departments is weak, and political will fluctuates with election cycles. Yet the legal framework is now stronger than ever, scientific knowledge is robust, and successful models like Chilika and Bhoj show that turnaround is possible. What remains is the harder, slower work of replicating these models at scale across thousands of smaller ponds, tanks, and wetlands that are quietly disappearing in towns and cities every year.

What do you think? If you walk through your own neighbourhood, can you identify a pond, tank, or wetland that has shrunk or vanished in your lifetime, and who do you think should be responsible for reviving it: the government, the community, or both?

References

1. https://www.researchgate.net/publication/359327332_RESTORATION_AND_REJUVENATION_OF_WATER_BODIES_ACROSS_DELHI-NCR_-AN_OVERVIEW
2. https://www.researchgate.net/publication/313837693_REVIVAL_AND_REJUVENATION_STRATEGY_OF_WATER_BODIES_IN_A_METROPOLITAN_CITY_A_CASE_STUDY_OF_NAJAFGARH_LAKE_DELHI_INDIA
3. https://www.researchgate.net/publication/311161709_Revival_of_Hauz_Khas_Lake_in_Delhi_Approaches_to_Urban_Water_Resource_Management_in_India
4. https://iwrmactionhub.org/case-study/india-conservation-and-management-bhoj-wetlands
5. http://swa.mp.gov.in/about-us
6. https://www.chilika.com/chilika-dev-authority.php
7. https://en.wikipedia.org/wiki/Chilika_Lake
8. https://jalshakti-dowr.gov.in/sites/default/files/NWP2012Eng6495132651_1.pdf
9. https://moef.gov.in/wp-content/uploads/wssd/doc1/Wetlands.pdf
10. http://www.indiaenvironmentportal.org.in/content/439733/order-of-the-supreme-court-of-india-regarding-wetland-conservation-in-india-08022017/
11. https://www.drishtiias.com/daily-updates/daily-news-analysis/strengthening-wetland-protection
12. https://www.cseindia.org/c-gins/bhoj-wetland-conservation-project-bhopal-india-37
13. https://old.ser-rrc.org/project/india-chilika-lake-restoration-orissa/