Centre for Science and Environment, New Delhi
This presentation is the property of its rightful owner.
Sponsored Links
1 / 19

Rain water harvesting PowerPoint PPT Presentation


The annual rainfall of Iran is about 13% as compared to rainfall in India. Despite of it, due to employing Rainwater Harvesting techniques and better water management , the government of Iran has been able to match up the water demands of the citizens of Iran.The presentations gives an overview of tomography, technology, various rainwater harvesting structures employed in Iran.

Download Presentation

Rain water harvesting

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Rain water harvesting

Centre for Science and Environment, New Delhi

JALSWARAJ-

MAKING WATER EVERYBODY’S BUSINESS

MAKING WATER EVERYBODY’S BUSINESS

Centre for Science and Environment, New Delhi


Rain water harvesting

Once consisted of group of seven islands called Colaba, Mazagaon, Old woman’s Island, Wadala, Mahim, Parel and Matunga – Sion.


Rain water harvesting

Vehar lake

Tulsi Lake

Tansa Dam

Vaitarna


Rain water harvesting

WHO GETS HOW MUCH…

  • BMC has extensive network…

  • BUT

  • Distribution is not uniform.

  • Suburban consumers have to supplement with tankers—spending at least Rs 450 per day

  • Also quality of tanker water is a major concern.


Rain water harvesting

The amount that goes ‘unaccounted for’…

About 20 to 25 per cent is lost in leakage and pilferage.


Rain water harvesting

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


Rain water harvesting

MIDDLE VAITARNA STILL WAITING FOR CLEARENCE


Rain water harvesting

And WASTAGE…FLUSHED 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


Rain water harvesting

WE ALL LIVE DOWNSTREAM

  • Only 24 per cent of the wastewater generated by urban India is treated—Mumbai 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


Rain water harvesting

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.


Rain water harvesting

WATER HARVESTING POTENTIAL OF MUMBAI

Area – 437 sq kmts

Annual avg .rainfall – 2000 mm

Potential - 2394.52 MLD

Present water supply = 2900 MLD

Options:Storage;recycling; 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.


Rain water harvesting

SUCCESS STORIES IN MUMBAI…

BEST BUS DEPOT

TATA INSTITUTE OF SOCIAL SCIENCE


Rain water harvesting

Basic concerns of a Mumbaikar…

  • Reclaimed land and threat of salinity. Quality of water—of both municipal supply and tankers

  • Unequal distribution

  • Wasteful consumption pattern—leading to overwithdrawal from sources—heading for urban-rural conflict?

  • Therefore, overall water management is the order of the day—with RWH as a key component


Rain water harvesting

Way AHEAD

  • Create informed public opinion…the ALMs can play a key role here

  • Training the real users

  • Strict legislation


Rain water harvesting

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.


Rain water harvesting

Role of the people..

  • None of this will work unless….

  • The citizens make rainwater harvesting their own business


  • Login