It’s finally rained where it matters most — the lakes that feed the city.
The last three days’ consistent rain has stabilised water levels in our major lakes and pushed two of them — Tansa and Tulsi — over the overflow mark on Tuesday, at 8.54 am and a little past midnight respectively.
Before this, Tulsi had overflowed on September 7 but its level receded over the next five days. Tansa supplies the city 455 million litres per day (MLD), Tulsi supplies 18 MLD.
In the last 24 hours, the water content across the six lakes has increased by 35,188 million litres, which roughly equals 10 days of the city’s water demand.
“Water levels have started stabilising. The met department has predicted cloud cover for the next few days and it’s likely to rain. We’re hoping it rains enough to push lake levels up further,’’ said Additional Municipal Commissioner Anil Diggikar.
Bhatsa, which meets at least 60 per cent of the city’s water needs, is up by one metre. On Tuesday, till 3 pm, Bhatsa got the most rain — 65 mm.
Tulsi recorded 62 mm, Modak Sagar and Tansa both recorded 13 mm, while Vihar and Upper Vaitarna got 40 mm and 33 mm respectively.
“It’s still very early to decide on rolling back the existing water cut since we haven’t seen any significant improvement in the lakes’ useful water content — we’re still short of 3 lakh million litres,” said Pramod Charankar, deputy municipal commissioner.
The city continues to see irregular spells of rain. On Tuesday, between 4.50 am and 8.30 am, Mulund got 53 mm of rain. Over 24 hours, it got the most rain in the city — at 132 mm — followed by Gawanpada (127.72 mm) and Dahisar (101.08 mm). The suburbs saw a few stray cases of waterlogging.
Elsewhere in the state, officials of Koyna dam in Satara district began discharging its water after it filled to capacity.
By Tuesday afternoon, they had opened all six of the dam’s sluice gates, increasing its discharge up to 36,000 cusecs.
The administration issued an alert for some of the villages on the banks of the Koyna river, which was swollen after the discharge.
Some villages in Karad and Patan talukas of Satara reportedly submerge after the discharge crosses 50,000 cusecs.
Rain to recede in 10 days
The downpour is likely to mellow down to a lighter drizzle over the next two days, predicted weather officials. On Tuesday morning, Santacruz recorded 111mm of rainfall, and temperature across the city dropped as low as 22° C.
Rainfall also decreased in north-central Maharashtra, as a result of the weakening of wind over the low-pressure area that had formed over the region. But this is likely to fluctuate, and has no bearing on the receding monsoon.
The weather bureau expects the monsoon to take another 10 days to recede.