Vihar lake,one of the sources of water supply to the city,finally overflowed on Thursday morning following continuous heavy showers over the past three days.
After receiving almost 96 mm of rainfall in 24 hours,the lake,situated in the Borivali National Park,started overflowing at 6 am after a considerable 0.31 metre rise within a day. Vihar supplies around 108 million litres of water to parts of south Mumbai everyday.
Hydraulic engineer Vinay Deshpande said even though four lakes have overflowed,the two major lakes Upper Vaitarna and Bhatsa still have a long way to go before they get filled. The water situation is good at present and very encouraging but it will be comfortable enough to lift cuts completely only when the two big lakes fill up, Deshpande said. After good rainfall in the past two months,the civic body has reduced the cut from 15 per cent to 10 per cent on August 13.
Out of the six lakes,Tulsi and Modaksagar were the first ones to overflow,on July 27 followed by Tansa that started overflowing on August 6. However,Upper Vaitarna,accounting for 18 per cent of the total water supply is still 3 metres short of overflowing,while state government-owned Bhatsa dam that supplies 59 per cent of the total supply is six metres short of the overflowing mark.
The current availability of water in the six lakes is about 10.77 lakh million litres as compared to 7.30 lakh million litres on the same day last year. The full supply capacity of all the lakes is a little over 13 lakh million litres.