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Rain Water Harvesting



 Sir.M. Vishweshwarayya “Rain Water Harvesting Theme Park” at 40th cross, 8th main, 5th block Jayanagar Bangalore-41

Water has been one of the most influential factors of the civilization. Due to increase in urban population and unscientific exploitation of fresh water resources, availability of potable water for human consumption is depleting and this will be one of the biggest challenges for society is going to face in future. Conservation & Harvesting of fresh water are immediate measures for sustainable development. Bangalore Water Supply and Sewerage Board or BWSSB is entrusted with the task of meeting the city’s need for drinking water and it is making every effort to discharge its responsibilities. Established in 1964, BWSSB, in order to provide efficient water supply services to people, has designed and executed many innovative projects. Since Bangalore does not have a perennial source of water, it conceived Cauvery Water Supply Scheme, CWSS, and implemented the scheme’s I stage in 1972. Three more stages of schemes were implemented in 1982, 1992, and 2002. The Bangalore population is increasing rapidly and it is estimated that the city’s population will touch 110 million by 2025. Even though considerable water is extracted from ground water resources to supplement the drinking water needs in the city, it is observed that there is large scale decline in the ground water levels and the quality of the water is also deteriorating. There is an urgent need to sustain these ground water resources through artificial recharge. The Bangalore city is endowed with very good rain fall and it is estimated that even if 50% of the incident rain fall is harvested it will provide to the tune of 10-15TMC of additional resource. With this in view in BWSSB, there is a mandatory for adoption of RWH for every owner or the occupier of a building having the sital area measuring 60’X40’ and above and for newly constructed building measuring 30’X40’ and above dimension. In order to encourage people to adopt RWH several popular measures are initiated.

In this regard BWSSB has initiated and constructed “Rain Water Harvesting Theme Park” in the name of Sir.M. Vishweshwarayya in 1.2 acre land situated at 40th cross, 8th main, 5th block Jayanagar Bangalore-41. In this park there are 26 different type of Rain Water Harvesting models are demonstrated along with the Water conservation tips at inside and outside the main building and at the first floor the Auditorium is set up with Green Air conditioning system and the same will be utilised to arrange the meeting and showing the video clip about the RWH to the Students as well as general public.


 Salient Features of Sir.M. Vishweshwarayya Rain Water Harvesting Theme Park Jayanagar Bangalore


Sl No.



Land Area - 4636 Sqm


Annual Rain water potential - 46,36,000 ltrs


Ground Floor Area - 707 Sqm


Features in the ground floor area-DEMO MODELS


(i) 2 types of live RWH models


(ii) 3 types of live STP models


(iii)5 types of Interactive models on water conservation


(iv)Console on sewage solution


First floor area - 135 Sq.m


Features-auditorium with 72 seating capacity with green Air conditioning and audio visual system to conduct meetings and interactive sessions.


Landscape Features


(i) 26 types of RWH live models as per the design of KSCST


(ii) Different type of plants depicting the water conservation


(iii) Different types of structures depicting the infiltration of Rain Water in to the ground and also collection and usage of rain water


(iv) Amphi Theatre- water body with stage and seating for 150 members for conducting drama and other cultural activity on water conservation





RWH awareness programmes with power point presentation are conducted with the support of elected representative of local body with wide publicity to the General Public, Residence Welfare Association members followed by interaction of gathering with known RWH experts and BWSSB officers. Till date 33 awareness programmes have been conducted.




Technical training was imparted to Plumbers/Contractor/Others for execution of RWH methods in scientific manner and also practical demonstration of the RWH methods at Karnataka States Council for Science and Technology, was organized. More than 1000 persons have been trained in 46 training sessions.




60 days Abhiyana programmes were conducted for the early morning walkers at leading parks like Lalbagh, Cubbon Park and in open area followed by street play on water conservation and RWH in different parks of the BBMP area. In the presence of local elected representative and talk on RWH and interaction with RWH experts and BWSSB officers, also took place. Till date 21 Abhiyana programmes have been conducted.




BWSSB has taken initiative to install RWH measures at the residential premises of VVIP dignitaries of Government of Karnataka to create the awareness on RWH and to spread the message to the people effectively example like CM’s home office, Vidhana Soudha, Vikasa Soudha, Raj Bhavan, MS Building and Cauvery Bhavan etc.




BWSSB has taken initiative to install RWH measures to its own civil structures

Location of Bangalore City

  • Topography: Situated on undulating land intermittently dotted with low hills and valleys
  • Latitude: 13° North
  • Longitude: 77° East.
  • Elevation: About 1000 meters above MSL
  • Temperature: Mean annual 24°C Extremes:15°C in winter, 37°C in summer.
  • Average rainfall: 972mm (30 years average) mainly distributed over 8months april-November with around 60 rainy days in a year


Natural Drainage Valleys :


  • Hebbal Valley
  • Vrishabhavathi Valley
  • Koramangala-Challaghatta Valley


Number of Lakes : 82


Water Potential & Availability

  • Total quantum of water potential from all the four sources – 1550 million lts. per day (MLD)


Actual availability of water per day

  • Water received – 1450 MLD
  • Water requirement – 1600 MLD
  • Water deficit – 150 MLD
  • As per WHO standards – Requirement is 135 LPCD


Availability of water is 100-120 LPCD


Water – The source

  • Fresh water is made available from Cauvery river apart from Borewells
  • Natural springs
  • Step wells, Ponds & lakes
  • Canals, Rivers
  • Open wells & tube wells


Rainwater – to rely on

  • Rain water would be the immediate resource to augment existing water supply system
  • By Simply “Catching wherever it falls”


Bangalore has around 60 rainy days



 Rainwater – at all places


  • Three methods
  • Roof top RWH
  • Runoff RWH (landscapes, parks, storm water drains, roads, etc.)
  • Natural storage and collection through lakes and tanks



Sl.No.      Document
1     RWH Brochure
2     RWH - Press Release
3     RWH Image 1 
4     RWH Image 2
5     RWH Image 3
6     RWH Image 4
7     RWH  Video
8     RWH PDF
9     ಮಳೆ ನೀರು ಕೊಯ್ಲು ಮಾರ್ಗಸೂಚಿಗಳು

Last Updated: 08-04-2022 09:41 AM Updated By: Creator

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