rain water harwesting

8/8/2019 Rain Water Harwesting

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Rainwater HarvestingRainwater Harvesting

byby -- MadhuMadhu

Water Conservation & Harvesting



Amount of drinking water in the world2



Per capita consumption India / World

Litres per personper day

Drin in 3

Coo in 4Bat in 20Flus in 40 Was in clot es 25 Was in utensils 20Gardenin 23

Total 135

3



India rainfall

India ann alrainfallis it in t et 6 c ntriesin t e rld.

B t e d n tc nserve t erain ater.



Rain Water Harvesting?.Rain Water Harvesting?. Rain Water Harvesting RWH- process of collecting, conveying & storing

water from rainfall in an area ± for beneficial use.

Storage ± in tanks, reservoirs, underground storage- groundwater

Hydrological Cycle



Roof Rain Water Harvesting

Land based Rain Water Harvesting

Watershed based Rain Water harvesting

For Urban & Industrial Environment ±

Roof & Land based RWH

Public, Private, Office & Industrial buildings

Pavements, Lawns, Gardens & other open spaces

RWHRWH ± ± MethodologiesMethodologies



Rain Water HarvestingRain Water Harvesting± ± AdvantagesAdvantages

1.Provides self-sufficiency to water supply

2.Reduces the cost for pumping of ground water

3.Provides high quality water, soft and low in minerals

4.Improves the quality of ground water through dilution when recharged

5.Reduces soil erosion & flooding in urban areas

6.The rooftop rain water harvesting is less expensive & easy to construct,operate and maintain

7. In desert, RWH only relief

8. In saline or coastal areas & Islands, rain water provides good quality water



Collecting surface water at the uilding gate1

The rainwater falling onthe o en s ace around theco lex can e collectednear the gate y rovidinga gutter with a erforated

lid. The collected watercan e led through a i einto a recharge wellof 1 etre dia and 5 etredee .

If the area around the flat co lex is aved with concrete,

we collect the water at the gate.

Rain Centre Two views of water collection at thegate.



What is ainwater harvesting?

Ca t re rain water, st re it an se it - it is as si le as that - Pri eMinister Vaj ayayee at a nati nal se inar n ain water harvesting, NewDelhi, May 22, 2000

C llect the rain water falling n h se t s, c llecti n n s, la es, en

areas with nat ral gra ing

ain water is nat rally re (exce ting where it bec es aci rain e tin strial ll ti n)

Gr n water c l be salty r brac ish

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R ural water harvesting1

ater she anage ent R alega n Si hi - Maharashtra



Collecting rain water in emple tanks

Before fter

ere are many temple tanks in t e city of Chennai. hey act as large storage

tanks, percolating rain water an charging the water table. his allowstho san s of people living aro n the tank to raw water from their wells

Desilting a temple tank costs between Rs 5 an 10 lakhs an is being one by the Rotary Cl b of Chennai

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Res lts t ate

The er r ater level has c e by 10 t 15 feet i those lacesthat have i stalle R H.

There are about 400,000 lots i Che ai.

I 2001, about 5000 lots ha R H i le e te .

I 2002, this fi ure is close to 50,000 lots

I 2003, the curre t esti ate oul be around 80,000 e have reached about 20% of the households.

1



ACKNOWLEDGEMENTACKNOWLEDGEMENTI am thankful first respectedI am thankful first respected kkpatelkkpatel who inspired me to makewho inspired me to make powerpointpowerpoint

presentation about of Rainpresentation about of Rain Water HarvestingWater Harvesting , Which I really enjoyed doing .Thanks are also, Which I really enjoyed doing .Thanks are also

due todue to respected,vkpatelrespected,vkpatel sir , who created interest in me & constantly encouraged me to dosir , who created interest in me & constantly encouraged me to do

this project.this project.

I am most thankful to our Principal madamI am most thankful to our Principal madam ManjuManju Sharma , I wouldn¶t have been ableSharma , I wouldn¶t have been ableto complete the project without their valuable guidance .to complete the project without their valuable guidance .

Mention must be made of my friendMention must be made of my friend SoumyaSoumya who tirelessly helped me in completingwho tirelessly helped me in completing

the work.the work.

Prepared by

Madhu K.B.

rain water harwesting

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