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Water for Bangalore
Water needs of Bangalore:
- Population of Bangalore 9 million
- Daily requirement of drinking
water @135 lts per person per day 1215 mld
- Add 20% for other uses 250 mld
- Total requirement 1465 mld
- Current Capacity of Cauvery 910 mld
- Shortage 555 mld
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Water for Bangalore
-Expected supply from Cauvery
IV Stage 500 mld
- Shortage after Cauvery IV Stagein 2013 55 mld
This shortage is on the basis of current
population. Actually this would have grown atleast by another 5%
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Water for Bangalore
How does the Water board propose to solve
this problem. Some of the proposed measures
are
- Bring water from Hemavathy
- Divert the west flowing rivers in Coastal
Karnataka and tap water from them- Use water in Manchanabele Reservoir
- Ultimately bring water from Almatti
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Water from Bangalore
How feasible are these ideas?
- One of the most basic principles followed in
River management systems is that the watershould not be diverted from the respective
basin areas because it negates the principles
of equity. The benefits from any river should
first address the needs of people living in the
particular river basin.
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Water for Bangalore
Let us now analyze the reasons for this sorry state
of affairs
- Primary reasons are the following
- Neglect of Arkavathy & Hesarghatta
- Neglect of the interconnected tank
system
- Converting SWD into a sewer system- Ignoring the benefits of circulation of
treated water for non potable purposes
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Water for Bangalore
A framework of Solution from the Citizensperspective
- Revive the Hesarghatta lake and Arkavathyriver system which can yield 300mld; it cantake care of 25% of our requirement and thewhole project can be a reality within 5 years.
Plans are already there and what is requiredis the administrative foresight and thepolitical will.
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Water for Bangalore
- Revive all the existing lakes of Bangalore,
not as stand alone lakes but as a completely
interconnected system of lakes. Wherever
the Rajakaluve is encroached either clear the
encroachment or create an alternative
interconnection. It will immediately bring up
the water table, compensate the heatcollector effects of asphalting and bring back
the famed climate of Bangalore
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Water for Bangalore
- Further this will revive thousands of dead
bore wells and significantly reduce the
dependence on the present water supplysystem, especially in the peripheral areas.
- This will enable a sustainable supply of at
least 200 mld through the planned use ofground water
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Water for Bangalore
- Stop all illegal letting in of sewage into the
Storm Water Drains which are meant for
collection and discharge of rain water.
- Relocate the sewage lines constructed
within the SWDs
- Prevent future violations by fencing the
SWD network and having 24/7 security
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Water for Bangalore
- This will enable the rain water to becollected in huge lakes around the city whereyou can set up water treatment plants and
supply drinking water.- This results in effective decentralization andbetter management
- It is estimated that an average rainfall of750mm p.a. can supply 120 days requirementof drinking water.
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Water for Bangalore
Going through the rainfall data for the past
110 years, it is found that the average rainfall
was less than 750mm per annum in about 20
years and for the rest of the years it has been
between 750 and 1300 mm. If proper storage
capacity is created this variation could also
be taken care of.
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Water for Bangalore
- Immediate steps need to be taken to supplytreated waste water for all non potableusage. This will effectively bring down the
demand for filtered water.- The actual requirement of filtered water isabout 35 to 40 Lts per person per day. Therest of the water is required purely for nonpotable use.
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- It should be mandated that all new layouts,
huge apartment blocks should have twin
water supply lines to facilitate the circulation
of treated water for non potable uses such as
toilet flushing, car washing, gardening etc.
- It is criminal to use filtered water for above
purposes
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Water for Bangalore
Once these schemes are fully implemented ourdependence on Cauvery comes down drastically as thefollowing table shows:
1. Arkavathy & Hesarghatta 300 mld2. Revival of Lakes 200 mld
3. RWH through SWD 400 mld
4. Recirculation of Treated Water 200 mld*
Total 1100 mld
*This can be far higher if the entire city is covered with twinwater lines.
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Water for Bangalore
- Shortage after the implementation
of Cauvery IV Stage 55 mld
- Contribution from new sources 1100 mld- Surplus 1045 mld
This surplus can meet the needs of another
8 million population
Projected Population of Bangalore by 2050 is
around 16 million
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Water for Bangalore
- In fact it can serve a larger population if we
mandate the use of twin water supply lines
for all new residential layouts; then the
requirement for filtered water will be only 40
liters per person per day.
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Water for Bangalore
It is abundantly clear that the ONLY possible
solution is to implement the measures
outlined above instead of pursuing inherently
unjust and unfair schemes which will create
unnecessary and avoidable inter and intra
state litigations without actually solving the
basic problem
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Water for Bangalore
-What every stakeholder needs to do
- For the successful implementation of this
project- the State Government should exercise
the necessary political will;
- BWS&SB should exhibit farsightednessin planning and implementing the
project
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- The citizens should resolve to change their
mind set regarding the water usage pattern
- Most importantly, there must becitizen participation right from the
planning to implementation stage
so that ultimately the whole projectwill benefit the citizens
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CAF intends to facilitate this through
active interaction among all the
stakeholders and is willing toarrange such interactive meetings
between and among all the
stakeholders
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Water for Bangalore
Thank You