After decades of rapid urban growth left Bengaluru’s lakes dry and streets flooded, a retired Army officer used 1923 maps to uncover and revive forgotten waterways that once kept the city’s water flowing smoothly.
- Ancient Raja Kaluves channeled rainwater across Bengaluru for centuries.
- Urban development buried natural channels, causing lake depletion and floods.
- Restoration of waterways revived 14 lakes and eased monsoon flooding.
What happened
Bengaluru has long grappled with a curious problem: heavy rains frequently flood roads and homes, yet many of its lakes remain dry. Retired Army officer Captain Santosh Kumar, returning to his hometown in Bengaluru’s outskirts, sought to understand this contradiction. His investigation revealed that the city’s historic rainwater channels, known as Raja Kaluves, had been covered or destroyed by rapid urbanization, blocking water from naturally flowing into the lakes.
By consulting detailed British-era maps from 1923 and working with local communities, Captain Santosh documented and traced these lost channels buried beneath concrete and buildings. Over several years, he led efforts to clear and restore nearly four kilometers of these waterways, reconnecting upstream lakes and allowing rainwater to return to its original paths. His work helped revive 14 lakes across the Anekal Taluk region.
Why it feels good
The restoration of the ancient Raja Kaluves offers a hopeful example of how rediscovering and respecting historical urban water systems can solve modern challenges. Instead of relying solely on new infrastructure, Captain Santosh’s approach honors the city’s natural landscape and centuries of wisdom, demonstrating that sustainability can lie in the past as much as the future.
Residents saw the benefits firsthand with the arrival of the next monsoon: while neighboring areas flooded again, the districts connected by the restored channels remained dry. This success highlights the resilience-building potential of community-led conservation and working with natural processes rather than against them.
What to enjoy or watch next
Bengaluru is home to an estimated 800 kilometers of stormwater drains, many altered or obstructed by fast urban growth. Inspired by Captain Santosh’s success, similar restoration efforts may expand, encouraging other cities to explore historic maps and community cooperation to revive their own water systems. Watching how this revitalization influences Bengaluru’s flood management and groundwater recharge in the coming years will be important.
Those interested in sustainability and urban planning may also follow updates on how local authorities integrate traditional knowledge with modern water infrastructure. This story illustrates the power of combining history, citizen science, and government collaboration to create more resilient and livable cities.