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South Delhi: Delhi has lost nine per cent of its wetlands in the past three decades as construction and population growth continue to expand, a study conducted by Delhi University (DU) along with HCL Tech and Terna Global Business School has found.

Some districts, including South Delhi, have seen a drop of almost 97 per cent in their wetland area, the study also found.

Published in the journal Research in Ecology in June 2025, the study examined satellite data from 1991, 2001, 2011 and 2021 to track how Delhi’s water bodies have changed over time.

Researchers said the total wetland area in the national capital fell by around nine per cent from 32.9 square kilometres in 2000 to 30.2 sq km in 2022.

During the same period, the city’s built-up area grew from 48

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