Extensive flooding in many parts of Yelahanka and Byatarayanapura constituencies has been attributed to unusually heavy rainfall that fell within hours, as well as a limited stormwater drainage system.
Chief Minister Basavaraj Bommai said he had instructed officials to prepare a master plan to widen rajakaluves and build diversion channels to deal with the problem of flooding while he visited the rain-affected Kendriya Vihar, Jawaharlal Nehru Center for Advanced Scientific Research (JNCASR ) and the Manyata inspected Techpark on Tuesday.
Due to the heavy rainfall, many lakes in Yelahanka were flooded.
Bommai said the existing rajakaluves are narrow, with widths ranging from 8 to 10 ft. This is insufficient to transport the enormous amount of waste.
Yelahanka Lake, which is connected to 11 other lakes upstream, was the source of the problem. Bommai shared that the heavy rains had led to flooding of all the lakes into Yelahanka Lake, which has two narrow rajakaluves that have been choked or degraded at various points. These drains must be a minimum of 30 ft. wide. Development rights transfer (TDR) could be used to acquire the necessary land.
After assessing the situation in the Kendriya Vihar residential complex, which houses 603 apartments, Bommai said the government would work with the National Highways Authority of India (NHAI) to construct a drain over the highway. Flood water flows through Yelahanka Lake, Jakkur Lake, Rachenahalli Lake and then to K.R. Puram, where they join the Pinakini before entering Tamil Nadu.
Apart from widening and clearing breaches, the government recently ordered the civil body to strengthen and renovate 50 km of rajakaluves.
According to Mr. Bommai, the BBMP has discovered 714 illegal structures on the Rajakaluves. Those from lower socioeconomic groups would be rehabilitated, while others would be given time to vacate their properties before their buildings were demolished.