WRD begins removal of invasive plants from irrigation tanks along Palar River in Vellore

The department began the operation in early June, deploying teams equipped with mechanical cutters and manual labor to remove the dense growth that chokes water storage. The work targets more than a dozen tanks that serve farms in the district, and officials estimate that each acre of tank surface can accumulate up to 15 tonnes of invasive vegetation during a single monsoon season. The removal effort is being coordinated with local panchayat leaders to ensure that the work does not disrupt daily water use.

Invasive plants such as water hyacinth and hydrilla spread rapidly in stagnant water, forming thick mats that block sunlight and reduce oxygen levels. When these mats cover the surface of irrigation tanks, they lower the amount of water that can be stored and increase evaporation losses. Farmers who rely on these tanks for irrigation often face reduced water availability, which can lead to lower crop yields and financial stress. The problem also affects biodiversity, as native aquatic species lose habitat and food sources.

The department expects that clearing the tanks will improve water retention and help restore the health of the Palar River system. By increasing the effective storage capacity, the move aims to support agricultural productivity during dry periods and reduce the pressure on groundwater extraction. Community volunteers have been invited to assist with monitoring and maintenance, and the department plans to conduct similar clean‑up drives in neighboring districts if the pilot proves successful.