Unnikrishnan et al.  have documented how the colonial and postcolonial history of water management in Bengaluru shapes the water infrastructure and provision systems today. Water access inequalities can be traced to the patterns of spatial development developed by colonial policies. Records from the sixth century onwards show how city rulers invested in an interconnected, community managed network of tanks and open wells, regularly recharged through harvested rainwater. The water system was changed at the end of the 18th century, as first the colonial state, then the post-independence government of Karnataka took responsibility for water management. Ideas of modernist planning influenced the development of new water infrastructure and piped networks, including the first piped infrastructure, bringing water from sources 30 km away, including the Hesaraghatta and then the TG Halli reservoirs. The old network of tanks gradually deteriorated as tanks became disused, polluted or built over. More prolonged and costly water transfers took place in the post-colonial period, delivering water from the Cauvery River in a massive engineering project with a high energetic cost and enmeshed in inter-state conflicts over water use . Scarcity is still a problem in Bengaluru. The citizen response has been an activist movement to reclaim the city's tanks, accompanied by a plea to reconsider current water uses within the city, including actions to protect and rejuvenate water wells . Unnikrishnan et al.  document different actions led by citizen-led collectives, including projects for lake rejuvenation, filtering technologies to treat sewage, recovering the value of lakes through a share of photos and art projects, and involvement of local knowledge in-tank restoration. Those efforts suggest an untapped potential to deliver adaptive green spaces through the recovery of Bengaluru's tanks.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report