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Centre for Science and Environment, New Delhi

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Once consisted of group of seven islands called Colaba, Mazagaon, Old woman's ... 80% potable water ends up as waste-water. And WASTAGE... FLUSHED down the drain ... – PowerPoint PPT presentation

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Title: Centre for Science and Environment, New Delhi


1
JALSWARAJ-
MAKING WATER EVERYBODYS BUSINESS
MAKING WATER EVERYBODYS BUSINESS
Centre for Science and Environment, New Delhi
  • Centre for Science and Environment, New Delhi

2
Once consisted of group of seven islands called
Colaba, Mazagaon, Old womans Island, Wadala,
Mahim, Parel and Matunga Sion.
3
Vehar lake
Tulsi Lake
Tansa Dam
Vaitarna
4
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7
WHO GETS HOW MUCH
  • BMC has extensive network
  • BUT
  • Distribution is not uniform.
  • Suburban consumers have to supplement with
    tankersspending at least Rs 450 per day
  • Also quality of tanker water is a major concern.

8
The amount that goes unaccounted for About 20
to 25 per cent is lost in leakage and
pilferage.
9
GROUNDWATER QUALITY
SEA WATER INTRUSION Colaba, Dharvi, Khar,
Anderi, Chembur, Malad etc.
INDUSTRIAL POLLUTION Greater mumbai area ( High
Nitrate, trace elements like Cu, Cr, Hg etc are
found in water)
Source Central Ground Water Board
10
MIDDLE VAITARNA STILL WAITING FOR CLEARENCE
11
And WASTAGEFLUSHED down the drain
  • Only 20 per cent of the water is used for
    drinking, cooking
  • Over 60 per cent is used for bathing, washing and
    flushing down the toilet. Important that our
    water toilets are still 10-12 litres per each
    pull of the chain.
  • Literally, water down the drain
  • ...80 potable water ends up as waste-water

12
WE ALL LIVE DOWNSTREAM
  • Only 24 per cent of the wastewater generated by
    urban India is treatedMumbai accounts for 23 per
    cent of the total amount produced
  • The rest 76 per cent is disposed of into WATER
    BODIES (rivers, lakes etc) untreated
  • These water bodies are the water sources for the
    cities in the down stream

13
But, strangely the supply is almost FREE
  • Water is cheapest in Delhi. 35 per KL as compared
    to production cost of Rs 6-7 per Kl.
  • Mumbai is in a better position, the cost for
    domestic supply is Rs 2.25 per KL and the
    production cost is Rs 5.74 per KL
  • In Indore the cost for domestic 2.00 per KL and
    the production cost is Rs 9.50 KL.
  • Bangalore charges Rs 5-60 per KL and the
    production cost is Rs 13 per KL.

14
WATER HARVESTING POTENTIAL OF MUMBAI
Area 437 sq kmts Annual avg .rainfall
2000 mm Potential - 2394.52 MLD Present water
supply 2900 MLD OptionsStoragerecycling and
recharge Even if we assume 70 of the area to
be developed, 50 of it to be roofed and we
collect 70 of the water falling over it, the
quantity of rainwater that can be harvested works
out to 589.34 MLD. This is a sizeable quantity
compared to water supply to Mumbai. It may also
be reminded that the Middle Vaitarna project is
for 455 MLD.
15
SUCCESS STORIES IN MUMBAI
BEST BUS DEPOT
TATA INSTITUTE OF SOCIAL SCIENCE
16
Basic concerns of a Mumbaikar
  • Reclaimed land and threat of salinity. Quality of
    waterof both municipal supply and tankers
  • Unequal distribution
  • Wasteful consumption patternleading to
    overwithdrawal from sourcesheading for
    urban-rural conflict?
  • Therefore, overall water management is the order
    of the daywith RWH as a key component

17
Way AHEAD
  • Create informed public opinionthe ALMs can play
    a key role here
  • Training the real users
  • Strict legislation

18
Mumbai
  • Mumbai Municipal Corporation has made rainwater
    harvesting (RWH) mandatory to the properties
    having plot area more than 1000 sq. mts.
  • This condition will also be made applicable to
    existing buildings in near future.
  • Recycling has been made compulsory for buildings
    having centralised A C plants.
  • BMC will supply 90 LPCD instead of 135 lpcd to
    ensure RWH will supplement the gap.

19
Role of the people..
  • None of this will work unless.
  • The citizens make rainwater harvesting their own
    business
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