After six decades of study, debate, and delay, Bangladesh has formally approved the Padma Barrage Project, committing Tk34,347 crore to what its proponents describe as the most consequential water infrastructure decision in the country's history. The approval came on 13 May at an Executive Committee of the National Economic Council (Ecnec) meeting chaired by Prime Minister Tarique Rahman. The barrage, to be built at Pangsha in Rajbari, is designed to confront a slow-moving crisis: the near-collapse of dry-season water flow in the Padma River since India's Farakka Barrage began diverting upstream flows in the 1970s.
A River System Under Decades of Stress
The ecological and economic damage caused by reduced Padma flows is not a recent concern - it has been accumulating for half a century. Before the Farakka Barrage became operational in 1975, dry-season flow in the Padma-Ganges system ran at roughly 70,000 cusecs. Upstream withdrawal has since reduced that figure to as low as 10,000 to 20,000 cusecs during critical months. The consequences have been severe and compounding: salinity intrusion into rivers, canals, and agricultural land across the south-western delta; accelerated siltation that disrupts navigation; reduced irrigation capacity; and a documented decline in fisheries output.
The Sundarbans, the world's largest mangrove forest and a UNESCO World Heritage Site, sits at the receiving end of this hydrological degradation. Excessive salinity has caused widespread "top dying" - a condition where mangrove trees die from the crown downward - threatening biodiversity across the delta. The 1996 Ganges Water Sharing Treaty between Bangladesh and India provided partial relief through a regulated allocation formula, but that 30-year agreement expires this year, adding fresh urgency to Bangladesh's search for domestic solutions to water insecurity.
What the Barrage Will Actually Do
The proposed structure is substantial in both scale and ambition. The main barrage will stretch 2.1 kilometres and include 78 spillways, 18 undersluices, fish passes, a navigation lock, and guide embankments. Three offtake structures will channel water into the Gorai, Chandana, and Hisna river systems. The barrage will store approximately 2,900 million cubic metres of water, creating a 165-kilometre in-stream reservoir - achieved, officials note, without requiring major additional land acquisition.
The project targets regulated dry-season flow from January to May across five river systems: the Ichhamati-Mathabhanga, Gorai-Madhumati, Chandana-Barasia, Boral, and Ichhamati. It will also support water supply to the Godagari Pump House, the Ganges-Kobadak irrigation project, and the Rooppur Nuclear Power Plant. Agricultural coverage extends to approximately 2.88 million hectares of cultivable land across seven districts - Kushtia, Faridpur, Jashore, Khulna, Barishal, Pabna, and Rajshahi. The feasibility study projects an annual increase of 2.39 million tonnes in rice production and 2.34 lakh tonnes in fish production. Hydropower generation is targeted at 113 megawatts. The barrage deck is also planned as a multi-purpose corridor for roads, power transmission lines, and gas pipelines.
The total project cost is estimated at Tk50,443.64 crore. A phased approach was recommended by the Project Evaluation Committee, with Tk34,347 crore approved for the first phase. Completion is tentatively scheduled for June 2033, with full financing from government sources. Annual economic returns are estimated at around Tk8,000 crore, with a projected 0.45% contribution to GDP growth based on FY25 figures.
Environmental Concerns and Unanswered Questions
The approval has not gone unchallenged. Bangladesh Poribesh Andolon (Bapa), a prominent environmental organisation, issued a critical statement arguing that the project was advanced before transparent impact assessments and public consultations were completed. The concern is not symbolic - large barrage structures alter river dynamics in ways that extend well beyond their immediate footprint.
Bapa has identified several specific risks. Sedimentation upstream of the barrage could raise the riverbed and intensify flooding and erosion along a 145-kilometre stretch from Pangsha to Rajshahi. Redirecting water toward the south-west during the dry season could reduce flows in central rivers, including the Arial Khan, and potentially allow salinity to penetrate further inland through the Meghna estuary. The organisation also raised a geopolitical dimension: by creating domestic storage, Bangladesh may inadvertently weaken its negotiating position when seeking a larger share of Ganges water from India in future treaty discussions.
These are legitimate technical concerns with precedents in comparable projects across South and South-East Asia. Large barrages and dams in river systems with high sediment loads - a defining feature of the Bengal delta - have historically underperformed their projections or produced unintended hydrological consequences downstream. Whether the project's feasibility studies have adequately modelled these risks has not been made publicly clear.
A Decision Shaped by History and Political Timing
Bangladesh began formally studying the idea of a Ganges Barrage in 1961. Four pre-feasibility studies were conducted between 1960 and 2000. Detailed feasibility and engineering design work was carried out between 2009 and 2016. Joint technical discussions with India at an expert level continued through 2016. Despite this long runway, the project sat unresolved for years - its scale, cost, and complexity repeatedly stalling formal approval.
The timing of the current approval is notable. The project was sent to the Planning Commission in January this year, near the end of the previous interim government's tenure. An attempt to place it before the Ecnec on 25 January was deferred when the then planning adviser called for more deliberation given the cost. The current government moved more quickly: a briefing with the Prime Minister on 6 May was followed by approval within a week. The directive to include an assessment of the project's GDP contribution before final sign-off suggests that economic framing was central to building the political case.
The broader project scope includes plans for seven satellite towns and modern rural townships to house approximately 1.5 lakh families across 3,450 acres, along with an estimated 9.27 lakh direct and indirect jobs over the implementation period. The project covers roughly 37% of Bangladesh's total geographical area, spanning four divisions, 26 districts, and 163 upazilas. Whether those ambitions are realised will depend on execution quality, environmental management, and the pace of implementation over the next eight years - conditions that Bangladesh's infrastructure history suggests should be watched carefully.
