Rainwater harvesting be ‘seamlessly integrated’ into Delhi’s ‘climate resilience planning’: HC

The bench took note of the “heavy and sporadic rainfall” which took place in northern regions of India this year that led to flooding across several states, including certain parts of Delhi.

“The deluge that inundated Delhi magnifies the relevance of proactively anticipating and preparing for extreme weather events, which are becoming increasingly commonplace due to climate change,” the court said.

The bench thereafter said that authorities must continually explore innovative strategies and proactively confront emerging challenges.

A persistent focus on educating the public and resident welfare associations about the advantages of rainwater harvesting, along with practical implementation guidance, can lead to a shift towards “sustainable water practices”, it emphasised.

The bench further said that the respondents (including the Municipal Corporation of Delhi/NDMC, DJB, DDA) “must periodically review empirical data” on implementation of rainwater harvesting measures to ascertain whether their efforts are producing tangible results and take corrective measures if required.

The observations were made by the bench while disposing of a 2014 PIL revolving around the “pressing concern” of water conservation in Delhi, with special focus on implementation of rainwater harvesting initiatives.

Taking note of the affidavits and status reports filed by various authorities, the HC said that the combined efforts of Delhi Jal Board and Delhi government, marked by installation of rainwater harvesting systems across both private and public structures, along with reinvigoration of water bodies, is “appreciable”.

“The development of manuals by CGWB and CPWD, offering guidance on artificial groundwater recharge structures and enabling individuals to seek necessary approvals, also represents a valuable stepforward. The inclusion of rainwater harvesting mandates within building byelaws further underscores the commitment to water conservation. DJB’s introduction of water tariff rebates as incentives for rainwater harvesting and wastewater recycling systems serves as demonstration of their commitment to the cause,” the HC said, noting the actions taken in connection with the PIL.

It further said that the “civic agencies and municipal corporations” which are responsible for approving building plans have taken on the role of ensuring adherence to these mandatory provisions.

The court observed that the urgency of water conservation has never been more paramount than in the present “dynamic urban landscapes”.

“Urbanisation, characterised by sprawling constructions, impermeable surfaces, and increased water consumption, strains existing water sources, leading to concerns about scarcity and depletion. In this context, the significance of rainwater harvesting as a viable solution cannot be overstated. By harnessing rainwater, which would otherwise go underutilised or contribute to flooding, cities can augment their water supply, alleviate stress on conventional sources, and mitigate the environmental repercussions of urban expansion,” the bench said.