WHY & WHEN MUMBAI FACES WATER CUTS ?

MUMBAI :If 7 lakes , supplying water to Mumbai , get water upto 14.47 lakh million liters before September 30 , which is considered as the end of monsoon season , then only , Mumbai will never face water shortage , otherwise any shortfall in this level , will result in water cuts in Mumbai .

India is expecting a normal monsoon in 2017.Mumbai has a quite good rain fall in this season.

MUMBAI DEPENDS ON 7 LAKES

Following are the 7 lakes , on which Mumbai demands upon , for city’s water needs .
(1)Bhatsa Lake,(2)Upper Vaitarna ,(3)Middle vaitarna , (4) Modak sagar , (5) Tansa Lake , ( 6) Vihar lake , (7) Tulsi Lake .

The rain fall in catchment areas of lakes are very essential for Mumbai to run smoothly. Any short fall in rains , in lake areas results in water cut measures in the city .

Bhatsa Lake has maximum share of water supplied to Mumbai .The Bhatsa lake provides 48 % of Mumbai’s water requirement , so it is the biggest source of water for the city .

Upper Vaitarna is the second largest supplier of water to Mumbai.Upper vaitarna supplies 16 % of water needed for the city .The  share  of water  supplied to Mumbai  from other lakes is  as following :

Middle Vaitarna ;12 % – Modak sagar ;11 %

Tansa Lake ;10 % – Vihar Lake ; 2 % – Tulsi  Lake ; 1 % ,

INDICATION OF GOOD RAIN IN  2017

During current Monsoon season  Modak sagar was the 1st lake to over flow , indicating a good rainy season this year .The Modak Sagar over flowed on July 2107 .It was till recently that Modak sagar had only 60 % of its capacity of water .

Following is the overflow levels of 7 lakes :

(1)Bhatsa Lake : 142.07 meters .

(2) Upper Vaitarna : 603,51 meters

(3)Middle Vaitarna ;285 meters

(4) Modak sagar  :  163.15 meters

(5) Tansa Lake :128.63meters

(6) Vihar Lake : 80.42 meters

(7) Tulsi Lake : 139.17 meters

In the years 2015 and 2016 , Mumbai’s lake areas did not get enough rain fall .In 2015 end of the monsoon season , that is on September 30 , every year , 2 major lakes supplying majority of city’s water demands had hardly 64 % of water capacity .

Total storage capacity of all these lakes is 14.80  lakh million litres.At bthe end of each monsoon season on September 30 , the capacity of lake must reach up to 14.47 lakh million litres .Mumbai can thus avoid water cuts in supply , throughout the year.

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