A Boundary That Keeps Transitioning
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- 8 min read
How a shifting river exposes the fractured federal architecture governing Delhi?
By Sagari Gupta
The Yamuna shifts course every monsoon. Three separate arms of government follow behind, resurveying the same stretch of riverbed. This is not an administrative failure. It is a structural consequence of what Delhi is.
Delhi is a Union Territory with a Legislative Assembly, governed simultaneously by the Union government through the Delhi Development Authority and the Lieutenant Governor, by an elected state-level government through the Delhi Legislative Assembly, and by the Municipal Corporation of Delhi at the local level. Each time the Yamuna moves, all three layers must redraw their jurisdictional lines. The river does not care which constitutional clause governs the land it leaves behind.
That three-way tension is now on record in the National Green Tribunal. In March 2026, the NGT directed the DDA to complete demarcation of a 22-kilometre floodplain stretch from Wazirabad to Palla by July 2026. The DDA reports to the Union government. The Delhi state government through its Irrigation and Flood Control Department is separately tasked with submitting flood boundary data. The Central Water and Power Research Station in Pune is producing the scientific baseline. Three agencies, three reporting lines, one unmapped river.
A Union Territory Like No Other
The 69th Constitutional Amendment Act, 1991Â inserted Article 239AA into the Constitution and created a new category: a Union Territory with its own elected legislature. Delhi is not a state. It does not control its own police, its own land, or public order. These three domains remain with the Union government under the Lieutenant Governor. Everything else, including urban development and local services, is divided across the three layers.
In practice, this means a single flood event on the Yamuna generates jurisdictional work across all three tiers at once. The DDA, a statutory body under the Union's Ministry of Housing and Urban Affairs, holds legal authority over the 9,700 hectares classified as Zone O, the Yamuna floodplain. Of that area, the DDA's own surveys show 7,362.56 hectares under encroachment as of 2025. The Delhi Legislative Assembly cannot independently legislate on this land. The MCD cannot resolve title disputes on it. Only the DDA can move, and the DDA moves slowly.
The Delhi Development Act of 1957, Section 2(b), defines the river boundary as the high flood level as determined by the competent authority. The Act assumed static geography. The Yamuna does not.
The River Moves. The Records Follow.
DDA records from 2020 to 2024 show the Yamuna's course shifting 47 metres annually between Wazirabad Barrage and Okhla Barrage. That movement created 23 new islands and eliminated 18 existing ones. Each change requires fresh jurisdictional determination under the Delhi Municipal Corporation Act, 1957.
Survey of India topographic Sheet 53 F/5 documents six course revisions since 1995. Each revision triggers cascading legal updates across property records, utility connections, taxation zones, and electoral boundaries. The Election Commission's delimitation exercises for Delhi Assembly constituencies have been complicated six times since 2000 because of Yamuna course changes. When the river shifted between 2018 and 2019, approximately 3,400 voters in trans-Yamuna colonies moved from one constituency to another without changing their residential address.
The Election Commission's Systematic Voters' Education and Electoral Participation programme identified this in its 2023 report as a unique urban challenge affecting an estimated 12,000 Delhi voters. The Constitution's Articles 81 and 170 require electoral boundaries to follow natural features where possible. They do not specify what to do when the natural feature moves annually.
Three Authorities, One River, No Agreement
The floodplain demarcation crisis is the clearest evidence of how the federal structure fails when agencies have overlapping mandates and no shared data platform.
The sequence is documented in Down to Earth's court digest from March 2026. After the July 2023 floods, a Joint Flood Management Committee under the Central Water Commission was constituted to map flood return periods at key barrages. That committee submitted its report in August 2024. The Irrigation and Flood Control Department, which answers to the Delhi state government, requested flood boundary data from CWC and received it in October 2024. It forwarded the map to the DDA, which reports to the Union government. The DDA is now supposed to conduct physical ground truthing jointly with the revenue department. The revenue department answers to the Delhi state government.
The Central Water and Power Research Station in Pune was separately tasked with a scientific assessment of the floodplain. In February 2026, the NGT noted that the CWPRS study faced technical issues and projected completion by August 2026. The NGT called that timeline unreasonable and directed Delhi authorities to submit a shorter, practical schedule.
As of March 29, 2026, the NGT observed that artificially created embankments cannot be treated as the outer limit for determining the floodplain. The DDA's counsel told the tribunal that demarcation responsibility lies with the DDA and the exercise will be completed by July 31, 2026. The matter is listed for hearing on July 16, 2026.
Property, Accretion and the Limits of Legal Permanence
Property rights create the most complex downstream problem. When the Yamuna shifts eastward, it deposits new land on the western bank while eroding the eastern bank. This produces legal conditions called accretion and diluvion. The Delhi Land Reforms Act, 1954, Section 17(3), states that accretion becomes state property if it exceeds one acre in any single flood cycle. Smaller accretions belong to adjacent landowners.
Measuring one acre requires surveying land that may not stabilise for years after formation. Delhi Revenue Department Settlement Records show 127 pending accretion cases as of March 2024, some dating to 1998. The Registry of Property Titles maintains separate categories for stable riverfront properties and dynamic riverfront properties. The latter category, created in 2003, requires annual verification of existence.
Administrative recursion follows: properties exist because they are recorded, but they can only be recorded if they exist long enough to survey. Between May 2022 and February 2026, the DDA reclaimed 1,426.6 acres of encroached floodplain. Yet without a mapped outer boundary, it remains unclear how much floodplain is still unaccounted for.
Infrastructure Designed for a River That Has Already Moved
Delhi's utility infrastructure reflects the same boundary instability. The Delhi Jal Board operates seventeen water treatment plants along the Yamuna. Its Engineering Manual 2022 specifies that intake structures must be modular and relocatable within a 200-metre corridor. The River Boundary Cell, established in 1998, tracks channel changes through satellite imagery analysis, ground surveys, and legal notifications. Each boundary revision takes eight to fourteen months, according to DJB's 2023 Annual Report. Each metre of course change requires surveying 2.3 kilometres of affected jurisdictional line.
The Delhi Metro Rail Corporation's Blue Line crosses the Yamuna at three points. Foundation designs approved in 2002 included provisions for channel migration up to 30 metres. Actual migration at the ITO-Indraprastha station has exceeded 45 metres, requiring foundation reinforcement in 2019 and 2023. The Central Public Works Department's Hydraulic Studies Division publishes annual reports tracking bridge vulnerability due to riverine dynamics. Data shows that static infrastructure design assumptions become obsolete within 15 to 20 years because of cumulative channel change.
The Municipal Corporation of Delhi spends Rs 4.2 crore annually on boundary resurrections, recorded in Budget Estimates 2024-25. That figure does not include the costs borne separately by the DDA or the state government's irrigation department. No consolidated account of total federal expenditure on Yamuna boundary work exists in any public document.
What Master Plan 2041 Proposes
The DDA's Master Plan for Delhi 2041Â designates riverfront areas as flexible development zones subject to periodic jurisdictional review. The plan introduces quinquennial review cycles: boundary classifications are updated every five years to reflect river course changes without requiring legislative amendment. This is a workaround, not a solution. It accepts that the legal fiction of permanent boundaries cannot survive the Yamuna's physics, and builds administrative flexibility into the planning framework instead.
The plan does not resolve the underlying federal problem. The DDA, the Delhi Legislative Assembly, and the MCD still operate on separate legal mandates with no unified data system. A quinquennial review by the DDA does not automatically update electoral constituency boundaries, property title records under the state revenue department, or MCD ward limits. Each agency must separately trigger its own revision cycle.
The Governance Gap This River Reveals
Delhi's experience with the Yamuna boundary is not a technical administrative problem. It is a structural feature of how the city is governed. The three-tier architecture created by the 69th Amendment produces parallel jurisdictions that share geography but not data, share mandates but not accountability, and share costs but not coordination.
When a river moves, the gaps in that architecture become visible. The DDA owns the floodplain but cannot unilaterally map it without data from a central government body and ground verification with a state government department. The Delhi Legislative Assembly can legislate on urban development but not on the land the DDA controls. The MCD administers local wards whose boundaries the Election Commission sets, which in turn depend on the Yamuna's position, which the DDA is supposed to track.
Climate change will make this more urgent. Increased precipitation variability will make river course changes more frequent across all major Indian river cities. The Ganga, the Brahmaputra, the Godavari, and dozens of smaller rivers run through cities where similar three-tier federal structures govern adjacent but uncoordinated jurisdictions. Delhi's boundary problem is not an aberration. It is a preview.
The administrative machinery of the MCD spends crores resurrecting lines the river erased the previous monsoon. The DDA reclaims acres while the boundary of what counts as floodplain remains contested in a tribunal. The state government submits flood data to a central commission that passes it to the DDA, which reports progress to the NGT while the next monsoon approaches.
The river continues moving. The paperwork follows. The question India's urban governance must answer is whether the architecture governing the paperwork is fit for geography that refuses to stay still.
Sagari Gupta is a public policy researcher with over eight years of experience in development research and governance. With a double masters in Philosophy and Economics, she has worked with NCAER, the Ministry of Consumer Affairs, and the Institute for Human Development. Her writing appears in Down To Earth, Deccan Herald, and other outlets, focusing on governance, climate policy, and AI regulation.
Sources and References
1. Constitution of India, Article 239AA — National Capital Territory of Delhi. https://legislative.gov.in/sites/default/files/A1991-44.pdf
2. Delhi Development Act, 1957. Delhi Development Authority. https://dda.gov.in/sites/default/files/inline-files/Delhi%20Development%20Act%2C%201957.pdf
3. NGT Order, March 24, 2026 — Yamuna Floodplain Demarcation. Down to Earth Court Digest. https://www.downtoearth.org.in/environment/daily-court-digest-major-environment-orders-march-24-2026
4. NGT Order, February 27, 2026 — Expedite Yamuna Floodplain Demarcation. Down to Earth Court Digest. https://www.downtoearth.org.in/environment/daily-court-digest-major-environment-orders-february-27-2026
5. NGT says artificial embankments cannot define Yamuna floodplain limits. NewsGram, March 29, 2026. https://www.newsgram.com/india/2026/03/29/ngt-says-artificial-embankments-cannot-define-yamuna-floodplain-limits
6. Who owns the Yamuna floodplain: Migrant farmers, landlords, or the DDA? India Water Portal, 2025. https://www.indiawaterportal.org/amp/story/rivers-and-lakes/displacement/who-owns-the-yamuna-floodplain-migrant-farmers-landlords-or-the-dda
7. Delhi Land Reforms Act, 1954. Delhi Revenue Department. https://revenue.delhi.gov.in/sites/default/files/Revenue/revenue/delhi_land_reforms_act_1954.pdf
8. DDA Master Plan for Delhi 2041. Delhi Development Authority. https://dda.gov.in/planning/master-plan-for-delhi-2041
9. Election Commission of India — Delimitation of Assembly Constituencies. https://eci.gov.in/files/file/12987-delimitation-of-assembly-parliamentary-constituencies/
10. Delhi Flood Safety Plan 2026. Irrigation and Flood Control Department, GNCTD. https://ifc.delhi.gov.in/doit-tabcontent/378
11. Delhi's Governance — Constitutional Framework. GS Score / IAS Score, December 2024. https://iasscore.in/current-affairs/delhis-governance
12. DDA homepage — Land management and floodplain reports. https://dda.gov.in
13. Tribune India — Expedite demarcation of Yamuna floodplain: NGT, February 2026. https://www.tribuneindia.com/news/delhi/expedite-demarcation-of-yamuna-floodplain-ngt/
14. SANDRP — Yamuna Manthan: A year after historic floods, where is river governance? July 2024. https://sandrp.in/2024/07/04/yamuna-manthan-040724-a-year-after-historic-floods-where-is-river-governance/