Bengaluru: From RWH to LED lights, Metro adopts slew of eco-friendly steps | Bengaluru News – Times of India
The median between MG Road and Trinity Circle wears a new look as part of BMRCL’s beautification project, undertaken in association with NGOs and firms
BENGALURU: The city’s water shortage during summer could be mitigated with Namma Metro’s rainwater harvesting (RWH) system.
Of the existing 42km Phase 1 network, 33km is an elevated viaduct with 33 stations. “It’s possible to collect rainwater through RWH since the viaduct is litter-free. It could be sold to interested parties for further filtering it and making it potable,” said BMRCL’s annual report of 2019-20.
According to rough estimates, more than 10 lakh litres of rainwater can be saved by Namma Metro every year, said a BMRCL official. “A large quantity could be used to fill many dying lakes in the city,” added the official.
“Rainwater absorption wells have been provided at every alternative span of the viaduct. This has resulted in recharge of groundwater resources across the Metro alignment,” the report added. Each Metro pier has in-built downpipes to carry rainwater to underground tanks. However, at many stations, they are choked. The corporation is planning pipes outside piers in Phase 2.
In 2012, BMRCL had invited firms to collect and sell rainwater drained through elevated structures between MG Road and Byappanahalli stations but got no response. RWH facility has been provided at 123 locations across the city.
BMRCL said LED lighting is being used at all Phase 1 stations instead of CFL, which has resulted in up to 25 kw of power being saved per station. “Stations are designed to utilise natural lighting during the day so lights installed at public areas don’t have to be switched on. This saves Rs 3.6 crore per annum,” the report added.
It said streetlights and high masts are controlled using timers, which helps save around Rs 8.7 lakh per annum, adding in underground stations, automated operation of environmental control system will save around Rs 2.9 crore per year.
Adaptation of platform screen doors in Phase 2 underground stations will reduce air-conditioning load from 900T to 400T per station. BMRCL is saving 32 lakh litres of water per month through air-cooled chillers.