As per the data, Delhi’s population has increased from 1.7 crore in 2011 to 2 crore in 2021 increasing the density from 11,297/sq km to nearly 13,600. The pressure is most acute in North-East and East districts, which are also highly prone to floods. New Delhi and South-West are relatively low-density districts. However, they aren’t immune to localised flooding. This is due to encroachments and reduced water absorption zones.
The city’s rapid urbanisation and increase in built-up area are contributing to its flood-vulnerable status. The loss of agricultural land and illegal occupation of natural drains add to this risk. This is according to the Environmental Improvement Plan of Delhi. The report was prepared in the aftermath of the 2023 floods. It highlights unchecked construction, inadequate drainage capacity, and waste mismanagement. These factors have compounded the capital’s flood risk in the last two decades.
Ignoring Environmental Necessities
The report flags the Najafgarh drain, North Delhi drains and trans-Yamuna channels as key encroachment hotspots. “Built-up areas increased manifold between 2001 and 2021, shrinking natural drainage and green cover. Even the Ridge has been denuded, reducing Delhi’s ability to absorb heavy rains,” the document notes. The Commonwealth Games Village on the Yamuna floodplain is cited as an example of infrastructure that obstructs natural flood flow.
The report calls for urgent corrective measures. These include clearing clogged drains and restoring floodplain buffers. It also emphasizes ensuring segregation and scientific disposal of waste. Protecting the city’s remaining green zones is essential. Without these interventions, climate-change-driven extreme rainfall could overwhelm Delhi’s already stretched drainage network.
In North-East district particularly, the combination of high runoff and limited infiltration increases the risk of flash floods. Potential drainage constraints also play a role. This combination creates a higher risk of flash floods. This is especially true during short-duration, high-intensity rainfall. Limited green spaces and permeable surfaces further reduce the infiltration of rainwater into the ground, contributing to surface runoff.
A govt official said there had been major work on drainage this year. This included flushing out silt from Barapullah and other major drains. The Delhi Development Authority conducted regular drives against illegal encroachment. They focused on the Yamuna riverbed and reclaimed 1,459 encroached acres in 2024.
The official added that several govt departments had been working continuously. They have been strengthening embankments and monitoring water levels. These efforts aim to prevent overflowing of the Yamuna.
For all latest updates Follow theviralmail on X, Facebook, and Instagram
