India, Sept. 20 -- The Delhi government on Friday unveiled a Rs.57,000-crore drainage master plan, the first such comprehensive overhaul in nearly 50 years, to prepare the Capital for intensifying monsoons, rising climate pressures and relentless urbanisation.

The plan, which will be implemented in five phases over the next five years, laid out a 30-year roadmap to strengthen the stormwater network, reduce waterlogging and build resilience against extreme rainfall events, officials said.

The plan divides Delhi into three basins -- Najafgarh, Barapullah and Trans-Yamuna -- redesigned using modern hydraulic modelling and engineering interventions.

Once it is implemented, the city's drainage capacity will increase nearly threefold from 25...