Concrete walls around drains to fight floods
Chief Minister Basavaraj Bommai approved a proposal by the BBMP (Bruhat Bengaluru Mahanagara Palike) to build concrete retaining walls around 88.5 km of stormwater drains (SWD) in the city. The project, costing Rs 962 crore, or as much as Rs 10.86 crore per km, is expected to free 58 low-lying areas from flood vulnerability.
However, ecologists countered that concretisation would lead to fast surface runoff and also hinder the percolation of water into the ground, leading to flooding. The need of the hour is a more integrated and holistic approach to water management, they said.
BBMP claimed it had already built concrete walls around 312 km of SWDs at the cost of Rs 2,169 crore over the last five years. Bommai asked the BBMP to also prepare a DPR (Detailed Project Report) to widen…