Discussion on the technologies on revival of water bodies for climate resilient cities

The Centre for Science and Environment (CSE), New Delhi, successfully hosted a virtual roundtable on January 30, bringing together senior government officials, researchers, academicians, non-profits, donors, and technology providers to discuss lake rejuvenation strategies. The discussion emphasized that technology selection must align with the hydrogeology of the waterbody, and understanding the type and usage of a lake is essential before implementing solutions. Participants highlighted that concretization and beautification should not be prioritized over ecological restoration. Collaboration between departments responsible for lake ecology, catchment, and water quality is crucial for meaningful impact.

A key topic of debate was the use of treated wastewater to fill lakes, as many cities lack proper reuse standards and monitoring mechanisms. The discussion also stressed the importance of regular, multi-scale monitoring at the local, regional, and basin levels to ensure long-term sustainability. Given the interconnected nature of many lakes, a holistic restoration approach is necessary. Additionally, if desilting is undertaken, scientific planning must be followed. Encouragingly, several successful lake restoration projects are already underway, proving that with well-planned interventions, rejuvenation is achievable.

The roundtable underscored the urgent need for sustainable policies, scientific interventions, and strong monitoring frameworks to restore and protect urban waterbodies effectively.