The city’s water managers say the heavy showers, triggered by a deep depression over the Bay of Bengal had on Thursday swelled combined storage in the Poondi, Sholavaram, Red Hills and Chembarambakkam reservoirs to 2.2 thousand million cubic feet (tmcft). The total capacity is 11.05tmcft.
Storage had dwindled to 0.2tmcft on October 26, making Metrowater officials jittery. “If we get another good spell of rain, we should be able to pull on till the next monsoon,” a senior official said.
When storage hit a low, Metrowater depended on Cau very water from Veeranam Lake in Cuddalore, the city’s desalination plants, which supply around 200mld and agricultural wells to maintain supply .
But it struggled to meet 550 million litres a day (mld), far too inadequate to meet the needs of the expanding city .The core city has a demand of 1,000mld.
Officials said storage at Veeranam Lake had reached 50% of its capacity on Thursday .
The utility used agricultural wells to supply 180mld from places like Thaganur, Pularambakkam, Moovur, R R Kandigai and Valliyur in Tiruvallur district.
Due to the crisis, Metrowater supplied water only on alternate days for several months.
Storage in major reservoirs across the state increased by between 3ft and 20ft over the past fortnight.The level in Mettur dam, the lifeline of the delta region, has risen by 20ft, raising hopes of farmers of a longterm samba crop.