According to data sourced from the BBMP, 405.6 km of channels need to be cleared (east zone: 18.96 km, west: 7.66 km, south: 6.63 km, Koramangala valley: 18.39 km, Yelahanka: 58.68 km, Mahadevapura: 135.01 km, Bommanahalli: 43.17 km, RR Nagar: 74.61 km and Dasarahalli: 42.52 km).