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Chennai also is known as Madras is the capital of the Indian state of Tamil Nadu. Located on the Coromandel Coast of the Bay of Bengal, it is the biggest cultural, economic and educational centre of south India.
The city is facing an acute water shortage now (June 2019). Chennai is entirely dependent on groundwater resources to meet its water needs. There are four reservoirs in the city, namely, Red Hills, Cholavaram, Poondi and Chembarambakkam, with a combined capacity of 11,057 mcft. These are the major sources of freshwater for the city.
Apart from the reservoirs, the other sources of freshwater are desalination plants at Nemelli and Minjur; aquifers in Neyveli, Minjur and Panchetty and Cauvery water from Veeranam lake.
Here is an attempt to put together a dataset that has information about the various water sources available in the city.
Why: Problem statement
People are not aware of the acute water shortage in Chennai. The water crisis is increasing year by year. People are using more water without understanding the availability of water.
How: Solution description
This dataset has details about the water availability level and rainfall in the four main reservoirs over the last 15 years
The data is available on a daily basis and the unit is million cubic feet.
The data is available from 1st January 2004 to 17th June 2019.
I used Data Science for analysis. Data Science is increasingly being used as a scientific language. Once I understood what the dataset is about, I started an analysis based on my data.
No. of data available for Reservoir Levels and Reservoir Rainfall: 5647
Cholavaram Lake is a smaller one while compared to others.
Redhills Lake maintains a higher average water level.
In the last few years, 2004 to 2018 (15 years), on an average, Redhills gives 36.7 %, Chembarambakam 31.1%, Poondi 26.5% and Cholavaram 5.6% of water supply to Chennai Corporation. From the results obtained, Redhills provides the maximum amount of drinking water.
Average rainfall in the past 15 years (2004-2018).
Rainfall in the past 2 years (2018 and 2019). There is an acute water shortage in the year 2019 as there is a considerable decrease in rainfall in the year 2019.
After 2011, all 4 major lakes have not received good rainfall. Their water level gradually decreased after 2011. In 2004 and 2019 all water levels met 0 levels. In 2011, all water levels reached their peak.
4 Major lakes are at peak levels in the months of November, December and January. Then water levels gradually decreased till August. It started to increase from September.
From 2005 to 2011 total water levels were above 5000 in the month of May. It decreased from 2012 to till date. In 2019 rainfall levels almost decreased to 0.
This plot clearly states that when rainfall is avg we can maintain water level above 5000 (the year 2005 - 2011). In 2015 rainfall reached peak levels but total water capacity has not increased.
How is it different from competition
We used data science and Machine Learning to perform this analysis. By these analyses, we were able to arrive at some significant findings like:
Decrease in water levels from 2012 to till date.
Highest rainfall and water levels in Red hills lake.
Highest level of water supply from Red hills lake and the lowest level of water supply from Cholavaram lake.
Who are your customers
Chennai Metropolitan Water Supply & Sewerage Board (CMWSSB) and common people are our customers.