Biome Trust designed and installed a rooftop rainwater harvesting system at Govt Telugu School, Ulsoor, and also conducted sessions on water literacy for the students and teachers. Funding support was from Brady India.
2. 2
Headmistress Lakshmi Devi (9844736224)
Contact person: Mr Keshava (9986825214)
Students 70
Toilets 2 for girls, 3 for boys
Borewell One borewell exists in the campus but due to
broken pipe the water is not pumped and used
Existing water storage Sump of ~2000 L, 2 OHTs of 500 L and 1 OHT of
200 L (Total 3200 L)
School Development Management
Committee (SDMC)
Present. 24 members. Meeting held once a month
Background of the students The children coming to the school are from places
like KR Puram, Nagawara, Banaswadi
Overview of the existing infrastructure and water supply
The existing water supply to the school is from BWSSB i.e. Cauvery water supply. The water
is supplied once every 3 days. It is stored in an underground sump of ~2000 L and then
pumped to the overhead tanks (OHTs) of capacities 500 L (2 OHTs) and 200 L (1 OHT).
From the OHTs the plumbing connections have been given to the handwash station,
5. 5
Rainwater harvesting potential
Roof area Runoff
coefficient
Annual runoff at
930 mm (KL)
Runoff at 10 mm
rainfall (KL)
Runoff at 30 mm
rainfall (KL)
116.31 0.9 97.36 1.0 3.14
The school can harvest around 3000 litres from an average rain of 30 mm, and around
97000 litres annually.
Proposed strategy for rainwater harvesting
● The sound part of the rooftop will be considered for RWH
● The downtake pipes will be directed towards existing but unused rainwater harvesting
tank
● Prior to collection and storage, the rainwater will be filtered through a first rain
separator (FRS) and gravel filter
● The defunct RWH tank will be revived
● Taps will be provided on the revived tank
● The water from the tank will be used for hand wash, plate washing, etc
● School has requested Biome to level the area around the handwash station and pave it
● Recharge well of 3ft diameter and 25 ft depth proposed next to the existing borewell to
recharge it indirectly
● The rooftop area with leakage issues that has not been considered for storage of
rainwater will be used for connecting to the recharge well
Recharge well plan