Hyderabad: The Hyderabad Metropolitan Development Authority (HMDA) will set up floating trash barriers, the first of its kind in the city, at the confluence point of the Balkapur nala in Hussain Sagar to prevent the flow of trash into the lake.
Hussain Sagar, spread over 4.7 square km with a shore line of 14.70 sq km, gets inflows from drains which carry floating matter such as plastics, water hyacinth, duckweed and pooja material, among other waste.
Apart from the Kukatpally, Picket and Banjara nalas, the Balkapur nala is one of the major drains that flows into the lake. The Balkapur nala gets inflows from Shaikpet, Chintal and Banjara Hills, among other adjoining areas, before it flows into the lake.
HMDA already took up the interception and diversion of a major portion of inflows from the nalas. Of the 400 MLD inflows into the lake, nearly 360 MLD was diverted. Stepping up its conservation efforts, the authority is working on setting up floating trash barriers to prevent the inflow of trash into the lake.
The project is being planned to be taken up at the confluence point (Bridge I and II) of Balkapur nala into the lake.
Floating trash barriers act like a screening mesh and filter the entry of waste into the lake, without hindering the water flow, a senior HMDA official said. HMDA is roping in private agencies for the project. The agency will be responsible of installing the barriers in sections at designated locations.
The barriers will be put up in a way that they block the entry of waste over the water surface, and to an extent, below the surface as well. All measures will be taken to ensure that the barriers withstand the pressure of the trash load and stay afloat, the official said.
This is done keeping in mind the monsoon when large quantities of waste flow into the lake along with rainwater. All efforts are being made to set up the floating trash barriers before the monsoon and ensure minimal entry of waste into the lake, the official said.