With mercury soaring, the water level in Upper Lake, the lifeline of Bhopal has gone down by over four feet compared to last year.
On Monday the water level in the lake was 1657.8 feet above sea level, while last year the level on the same day was 1662.05 feet.
This decrease is primarily owing to increased rate of evaporation and daily withdrawal of water from the lake, said officials.
Upper Lake supplies water to around 40% of the residents in Bhopal.
Every day around 25 million gallons (MGD) of water is drawn from Upper Lake.
However, officials claimed that this downslide in the water level will not affect the water supply for some time.
Talking about the level in upper lake, BMC assistant engineer (water) Rakesh Nigam said heat wave over last fewweeks has increased rate of evaporation.
He said the water level in the Upper lake had plummeted to 1657.80 feet.
“On an average, on hot summer days, the water evaporates from the Upper lake at the rate of nearly 0.025 inches per day,” he said.
The maximum water level after the deficient monsoon last year was around 1,663.7 feet and it had not reached its full tank level of 1666.8 feet, unlike 2013 when the lake has reached its full tank level.
The water bodies in Bhopal that supply drinking water are mainly rain fed.
The average annual rainfall in Bhopal is around 1,090 mm.
Bhopal has three main water sources Narmada, Upper Lake and Kolar reservoir.
Apart from securing 30-34 million gallons per day (MGD) from Kolar Dam, 18-25 MGD from Upper Lake and 3-5 MGD from ground water sources, water is also supplied from Narmada project.
Water level (in ft)
April 27, 2015 1657.80
April 27, 2014 1662.05
May 1, 2013 1661.3
May 1, 2012 1659.55
May 1, 2011 1652.7
Dec 22, 2010 1656
Monsoon end, 2008 1655.00
Monsoon end, 2009 1662.80
Summer end, 2009 1644.40 (lowest in recorded history)
Full Tank Level 1666.80 feet