RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater - the answer

A.R. ShivakumarPrincipal Investigator - RWH

KARNATAKA STATE COUNCIL FOR SCIENCE & TECHNOLOGYIndian Institute of Science

Bangalore – 560 012

Rainwater - the lifeWater is very much essential for lifeIn the modern society water fulfills several needsWater for drinking, bathing and cooking food are among the important daily needs for human kind

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rain water - the answerConventionally water is collected in vessels and stored for a days requirementIn urban areas houses are built with water storing places like underground sump & overhead tank

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater - the sourceFresh water is made available for consumption in many waysNatural springsStep wells, Ponds & lakes

(Bangalore 262 -> 82)Canals, RiversOpen wells & tube wells

(1998, 1 lakh - modest estimate)

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Lakes of Bangalore

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Bellandur Lake, 1942

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

A Sports Stadium today, Sampangi Tank earlier

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Koramangala Tank is today a Housing “Complex”

KGA Golf Course, Once Challaghatta TankRWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Bangalore City Bus Stand, Once Dharmambudhi Tank

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater – for BangaloreWater to Bangalore is being supplied from Cauvery riverTippagondanahalli andHessaraghatta reservoirsTube wellsWater is pumped from a distance of around 100km to a height of nearly a km

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rain water – to/for electricity

Precious electric energy is used to pump water to major storage places in Bangalore and also at individual destinations from ground level to overhead tanksUG Sump, electric pump, overhead tank ect., are integral part of an urban house

(since they have not approached nature for their requirement)

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater – to rely onRain water would be the immediate resource to augment existing water supply systemBy Simply “Catching wherever it falls”Bangalore has around 60 rainy days and like a clock work 85% of the rain arrives between 4p.m. and 7p.m.

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater – at all placesThree methods– Roof top RWH– Runoff RWH (landscapes,

parks, storm water drains, roads, etc.)

– Natural storage and collection through lakes and tanks

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater – the availabilityRainfall in mm for Bangalore(Potential in liters for 40ft X 60ft site)Average 917 2,04,454

1998 1414 3,15,2881999 1011 2,25,3462000 1238 2,76,0242001 1060 2,36,3802002 766 1,70,8602003 726 1,61,8982004 1165 2,59,7952005 1508 3,36,284

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rain water – the needWHO / IS standard – water requirement of a family per day is around 500 ltsWater requirement per year per family is around 1,80,000 ltsWater supply by most urban bodies is far below this figureOn an average a family spends around Rs. 250 Per month for water in Bangalore

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater - the answer

Rainwater Harvesting in "Sourabha"

0

5000

10000

15000

20000

25000

30000

35000

40000

Janu

ary

Februa

ry

March

April

May

June July

Augus

t

Septem

ber

Octobe

r

Novem

ber

Decem

ber

Month

Wat

er in

lite

rs

Water requirement Rainwater available Average Rainwater

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RAINWATER - availability

10,00030020,00060040,000120080,00024004001,00,0003002,00,0006004,00,00012008,00,00024004000

RAINWATER

Lts

ROOFTOPAREA IN

SFT

RAINWATERMM

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater harvesting

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Abandoned well as recharge pit

Recharge pit Filled with pebbles, gravel and sand

Ground water recharge

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

News Paper24th Aug 2004

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

News Paper7th Jan 2004

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

News Paper7th Sep 2004

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

News Paper28th Jan 2004

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

News Paper 28th July 2004

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Sakaleshpura News PaperApril 2006

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Various stages of rainwater Harvesting

Storage G.W. Recharge

Filtering

Channelisation

Collection

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Storage of water

Overhead tank

Ground level

Underground

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Fero-cement TankRWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH at BWSSB Office BanashankariRWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH at CPI Office

FIXING OF POPUP FILTER ON WALL SURFACE

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH at KSCST, PopUp Filter Flush CapRWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH at KSCST,PopUp Filter -Filter Element

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH at BMP, PopUp Filter Filter Element CleaningRWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Sand bed filter

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Before

AfterVi

dhan

a So

udha

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Rainwater Harvesting in a village house at Chitradurga District

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12RWH in a village school for drinking water

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Roof top rainwater harvesting for tile roof building

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Bambo gutter

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Ground water recharge pit Excavation

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

GROUNDWATER RECHARGE THROUGH

BARREL SYSTEM

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

GROUNDWATER RECHARGE THROUGH BARREL SYSTEM

Recharge pit with barrelsUnderground after installation

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Similar to IG with excavated pit lined with size stone without using mortarSoak pits are generally not filled with any filler materialSoak pits are covered at the top by a RCC or stone slabsRainwater is channeled to the soak pits after filtration for ground water recharge

Ground water rechargeRainwater soak pit

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Narrow excavated trenches of around 2 ft. wide and 2 ft. depthFilled with pebbles or aggregates with a top layer of coarse sandRainwater from open spaces, parks, payments, roads etc. can be channeled to these trenches for ground water recharge

Ground water rechargeTrenches

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Ground water recharge – road side trench

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Pavers with holes for ground water recharge

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Combination of PopUp filter and Infiltration gallery with aggregates and sand can be usedNeeds close monitoring of filtration systemSite specificCooperative efforts yields good results

Ground water rechargeOpen well or bore well

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Infiltration gallery around perforated bore well

RWH for Open WellRWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RWH for Open Well

RWH at Kengeri Beedi Workers Housing

RWH at Kengeri Beedi Workers Housing

RAINWATER HARVESTING THROUGH

CLOTH OR SAREERWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

RAINWATER HARVESTING AND GROUND WATER

RECHARGE -

MODEL

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12

Thank youA.R. Shivakumar

Office : 23341652Residence : 23398655Mobile : 98452 12314

RWH Cell, Karnataka State Council for Science and Technology, Indian Institute of Science, Bangalore-12