NGT issues notice to Centre against amendment on Ganga floodplains
The National Green Tribunal issued notice to the Centre on a petition challenging the River Ganga (Rejuvenation, Protection and Management) Authorities (Second Amendment) Order, 2026
The amendment, notified by the Jal Shakti Ministry on 7 August 2026 and published in the Gazette on 10 August 2026, removes the blanket "construction-free zone" designation for the Ganga's banks and floodplains that existed under the original 2016 order
In place of the blanket ban, the amendment introduces a tiered zonation: an "active floodplain" defined by a one-in-five-year flood return period, a "regulatory zone" covering areas between one-in-five-year and one-in-25-year floods, and a "warning zone" for areas between one-in-25-year and one-in-100-year floods
The petition contends the amendment narrows the area protected from construction compared to the 2016 order (which had used a 100-year flood frequency to define the floodplain) and wrongly pegs the "active floodplain" to a shorter, one-in-five-year return period
River Ganga (Rejuvenation, Protection and Management) Authorities Order, 2016
The 2016 Order was issued under Section 3 of the Environment (Protection) Act, 1986 and gave statutory backing to the National Mission for Clean Ganga (NMCG), creating a multi-tiered institutional structure — from the National Ganga Council down to District Ganga Committees — for river rejuvenation and pollution control.
Key Details
- Issued under Section 3, Environment (Protection) Act, 1986, which empowers the Central Government to take measures for protecting and improving environmental quality
- The 2016 Order designated the banks and floodplain of the Ganga (defined using a 100-year flood frequency) as a "construction-free zone" to reduce pollution sources and preserve natural groundwater recharge
- Created a four-tier institutional structure: National Ganga Council (chaired at the highest executive level), Empowered Task Force, National Mission for Clean Ganga, and State/District Ganga Committees
The 2026 amendment operates on this same 2016 Order, replacing its blanket construction-free zone with a graded, return-period-based zonation — the change at the heart of the NGT petition.
National Green Tribunal Act, 2010 — Jurisdiction and Powers
The NGT is a specialised statutory body for expeditious disposal of cases relating to environmental protection, established under the National Green Tribunal Act, 2010, with powers to hear disputes involving a "substantial question relating to environment."
Key Details
- Established under the NGT Act, 2010; principal bench in New Delhi, with regional benches at Bhopal, Pune, Kolkata, and Chennai
- Composition: a Chairperson (retired Supreme Court judge), Judicial Members (retired High Court judges), and Expert Members (environmental specialists), with equal numbers of judicial and expert members on any bench
- Section 14 empowers the NGT to hear civil cases involving substantial environmental questions; Section 16 allows appeals against orders passed under laws listed in Schedule I (which includes the Environment (Protection) Act, 1986, the Water (Prevention and Control of Pollution) Act, 1974, and the Forest (Conservation) Act, 1980)
- NGT orders are subject to appeal before the Supreme Court under Section 22
The floodplain amendment petition falls squarely within the NGT's jurisdiction as a "substantial question relating to environment" arising from a notification issued under the Environment (Protection) Act, 1986.
Floodplain Zonation and Flood Return Periods
A flood return period (e.g., "one-in-100-year flood") is a statistical estimate of the probability that a flood of a given magnitude will be equalled or exceeded in any given year — a one-in-100-year flood has a 1% chance of occurring in a given year, not a guarantee of occurring only once a century.
Key Details
- The 2016 order effectively used a 100-year return period as the benchmark for the protected floodplain/construction-free zone
- The 2026 amendment narrows the "active floodplain" (the most strictly regulated zone) to a one-in-five-year return period, with two lighter-touch zones (regulatory: 5-25 year; warning: 25-100 year) extending outward
- Narrower return-period benchmarks generally correspond to smaller high-restriction zones, since floods with shorter return periods (more frequent, lower-magnitude events) inundate a smaller area than rarer, larger floods
The petitioner's core argument is that anchoring the strictest protection ("active floodplain") to a one-in-five-year event — rather than the 2016 order's 100-year benchmark — shrinks the area where construction is tightly restricted, potentially exposing more of the historic floodplain to development.
Namami Gange Programme and Institutional Ganga Governance
The Namami Gange Programme is the umbrella scheme for Ganga rejuvenation, implemented through the National Mission for Clean Ganga, whose statutory status derives from the 2016 Authorities Order now being amended.
Key Details
- Launched in June 2014 as an integrated conservation mission, originally approved through 31 March 2021 and since extended
- Combines pollution abatement (sewage treatment infrastructure) with river rejuvenation and afforestation along the Ganga basin
- The NMCG functions as the implementing arm of the National Ganga Council under the 2016 Authorities Order, making the Order the legal backbone for the Mission's regulatory powers, including floodplain protection
Because floodplain protection is one of the regulatory tools under the NMCG's mandate, changes to the definition of "active floodplain" directly affect how the broader Namami Gange rejuvenation effort is implemented on the ground.
- Amendment: River Ganga (Rejuvenation, Protection and Management) Authorities (Second Amendment) Order, 2026 — notified 7 August 2026, published in the Gazette 10 August 2026
- Original order amended: River Ganga (Rejuvenation, Protection and Management) Authorities Order, 2016, issued under Section 3 of the Environment (Protection) Act, 1986
- New zonation: active floodplain (1-in-5-year flood), regulatory zone (1-in-5 to 1-in-25-year flood), warning zone (1-in-25 to 1-in-100-year flood)
- The 2016 order had used a 100-year flood frequency to define the protected floodplain and imposed a blanket construction-free zone
- NGT Act, 2010: principal bench in New Delhi plus four regional benches (Bhopal, Pune, Kolkata, Chennai)
- Namami Gange Programme launched June 2014, implemented by the National Mission for Clean Ganga