Robots Join the Fight to Save Kerala's Choked Vembanad Lake

Kumarakom’s famous backwaters, once a serene escape, are now grappling with an invasive enemy: water hyacinth. Thick mats of the weed have choked stretches of Vembanad Lake, crippling tourism, stalling boats, and threatening livelihoods. But starting September 10, this Kerala village is fighting back—with robots.

Why robots?

For years, water hyacinth has been both a resource and a menace here. Crafters and farmers found uses for it, but its spread has become relentless. Resorts watch as kayaks and shikaras get stuck; ferry services cancel trips because propellers clog and break. The lake’s heartbeat is slowing.

That’s where technology steps in. An unmanned boat, electric-powered to keep emissions low, will navigate the clogged waters. Its robotic arm will harvest the hyacinth, then pass it along a conveyor to a second boat where workers will manually remove plastic and other debris. After that, it gets shredded right on the water—efficient, focused, modern.

“The system includes an unmanned boat equipped with a robotic mechanism to harvest water hyacinth,” said Rojith Gireendran, research scientist and director, FERI.

Impact on community

Local hoteliers feel the strain daily. “The accumulation of water hyacinths has badly hit tourism activities in Kumarakom,” said K. Arun Kumar of Lake Song Resorts. “Sometimes, we are unable to meet guest demand for backwater cruises.”

It’s not just tourism. Public transport between Muhamma and Kumarakom is suffering—trips that should take 45 minutes now drag to an hour and a half. Farmers and fishers, too, find their rhythms disrupted.

What’s next?

If the pilot succeeds, the project could expand across Vembanad. The Kottayam district panchayat has already promised support—including funds to help market products made from the harvested weed.

There’s cautious hope in the air. For a community tied to the water, this isn’t just about cleanup; it’s about reclaiming a way of life.