Indian Public School

Nagavara, Bangalore, Karnataka
(Feb - March, 2022)

Size: 1.5 acres

Elevation(m): 930

Annual Rainfall(mm): 900

Climate: Tropical Savanna

Function: School - Dealing with a dwindling water tables & an irregular muncipal supply while increasing its admissions capacity.

Key features: Open well-Recharge wells-Rooftop rainwater harvesting system with a ferrocement tank-Earthworks; culverts, bioswales

Located in the Nagavara lake's watershed in a rapidly growing locality in R.T. Nagar, Bangalore, this school found itself dealing with rapidly dwindling water tables and an irregular municipal water supply. Paradoxically, roof and runoff water was also resulting in flooding that had carried away almost a foot of top soil. The management of the school was keen to switch over to a more sustainable water strategy and we were primarily involved with planning the roof rainwater harvesting systems and the stormwater strategy to deal with flooding.

After completing a detailed assessment of water requirements, simulations were run for varying levels of storage capacity for the roof rainwater harvesting system to arrive at the most optimal storage capacity. A couple of recharge wells and some earthworks were strategically located to address flooding. These measures will not only go on to address the flooding but will also positively impact groundwater levels in the neighbourhood over time. An open well has also been dug in the inflence zone of one of the recharge wells to withdraw for irrigation needs.