Water as Power: The Political Economy of Water Distribution in Bangladesh and Southeast Asia

Why water has become a political weapon, not just a resource

For most of history, water was treated as a gift of nature, something that simply flowed from the mountains to the sea. That idea is gone. Today, water is counted, measured, dammed, diverted, and used as leverage between nations. In South Asia and Southeast Asia, two of the most densely populated and river-dependent regions on earth, water has quietly become one of the sharpest tools of foreign policy.

Bangladesh sits at the receiving end of this system. It is a delta nation, the final stop for water flowing down from the Himalayas through India and China. What happens hundreds of kilometers upstream, in a Chinese dam or an Indian barrage, decides how much water reaches a farmer's field in Rangpur or Kurigram months later. This is the essence of political economy applied to water: control over a shared resource translates directly into economic power, food security, and diplomatic influence.

The upstream advantage: how geography decides power

In international relations, the country that sits upstream on a river almost always holds the stronger hand. It can build dams, store water, release it on its own schedule, and change the timing of floods and droughts downstream. The country downstream, no matter how large its population or how urgent its need, is left to adapt.

Bangladesh shares 54 rivers with India and several major systems that originate in China. This makes the country what geopolitical analysts call a "lower riparian" state, meaning it depends on the goodwill, treaties, and infrastructure decisions of its upstream neighbors. This single geographic fact shapes a huge part of Bangladesh's economic planning, from irrigation schedules to salinity control in the coastal belt.

Case one: the Ganges Treaty and the Farakka question

The 1996 Ganges Water Treaty between India and Bangladesh was signed to end decades of dispute over the Farakka Barrage, an Indian structure that diverts Ganges water before it reaches Bangladesh. The treaty set a formula for sharing dry-season flow and was seen as a landmark example of transboundary water cooperation in South Asia.

That treaty is set to expire in December 2026. This expiry has quietly become one of the more consequential dates on Bangladesh's diplomatic calendar. A recurring concern in Dhaka is that the flow measurements at Farakka are recorded solely by India, with no independent Bangladeshi presence to verify the numbers upstream. Bangladesh is left to trust data it cannot check, which fuels long-standing suspicion that undeclared diversions reduce the water actually reaching the border. As the renewal talks approach, the core political question is not just how much water Bangladesh will get, but whether the next agreement will finally build in transparency and joint monitoring that the current one lacks.

Case two: the Teesta dispute, a 40-year deadlock

If the Ganges Treaty shows what a signed agreement looks like, the Teesta River shows what happens without one. The Teesta is the lifeline of northern Bangladesh, feeding agriculture and livelihoods across Nilphamari, Lalmonirhat, Rangpur, Kurigram, and Gaibandha. Roughly two-thirds of the river lies inside India, and more than 20 dams and hydropower projects have been built on the Indian side, sharply reducing dry-season flow before it ever reaches Bangladesh.

A sharing formula was almost finalized in 2011, giving India a larger share and Bangladesh a smaller one, but the deal collapsed at the last moment when the state government of West Bengal refused to sign on. Under India's federal system, New Delhi cannot commit water from a river flowing through a state without that state's political buy-in, and West Bengal's government has blocked the agreement for close to fifteen years.

This is where political economy becomes visible in its rawest form: a resource dispute between two nations is actually decided by internal politics inside just one of them. Bangladesh, the smaller and downstream state, has almost no leverage over a dispute happening entirely inside another country's domestic politics. Following a change in West Bengal's state government in 2026, there is fresh talk in Dhaka that the deadlock might finally break, but decades of false starts have made most observers cautious rather than hopeful.

Case three: China enters the picture

A new and larger player has now entered South Asia's water politics. China has begun building what is expected to be the world's largest hydropower project, a mega-dam on the Yarlung Tsangpo river in Tibet, right before the river crosses into India as the Brahmaputra and later into Bangladesh as the Jamuna. The project is expected to have a generating capacity of around 60 gigawatts, roughly three times the size of China's Three Gorges Dam.

For India and Bangladesh, the concern is not only about electricity. It is about who controls the timing and volume of water crossing their borders in the future. Some researchers estimate that dry-season flows into Bangladesh could fall by 10 to 30 percent, while a large share of the sediment that keeps the Ganges-Brahmaputra delta stable could be trapped upstream. That sediment is not a minor detail. It is what has kept Bangladesh's delta land from sinking and eroding for centuries, and losing it would speed up land loss, salinity, and flooding along the coast.

Interestingly, China's growing footprint has also created new diplomatic options for Bangladesh. Dhaka has discussed Chinese investment in a Teesta River management and restoration project, offering funding for dredging, embankments, and reservoirs that India has been unwilling or unable to provide. This puts Bangladesh in a delicate position, needing India's water cooperation on one river while considering Chinese money on another, all while India watches China's growing presence in the region with visible unease. Water diplomacy in South Asia is no longer a two-country conversation. It has become a triangle.

Southeast Asia's version of the same story: the Mekong

Move east and the pattern repeats itself on an even larger scale. The Mekong River supports an estimated 60 million people across Myanmar, Laos, Thailand, Cambodia, and Vietnam, powering fisheries, farming, and rapidly growing economies. China, sitting upstream, has built more than a dozen major dams on its stretch of the river, known there as the Lancang, giving it the ability to hold back water during the wet season and release it during the dry season largely according to its own energy needs.

The regional body meant to manage this, the Mekong River Commission, includes Cambodia, Laos, Thailand, and Vietnam as full members. China and Myanmar sit outside as dialogue partners only, which means the commission has no real authority to stop or even slow down upstream projects. In 2015, China set up its own parallel framework, the Lancang-Mekong Cooperation initiative, which analysts widely see as a way to manage the region on Beijing's terms rather than submit to a shared, binding governance structure.

Downstream nations are not simply victims in this story either. Laos has openly branded itself the "battery of Southeast Asia," building dam after dam to export electricity and earn foreign currency, even though this adds further strain to a river system already under pressure. Vietnam and Thailand have built dozens of their own dams on tributaries. The result is a race where every country tries to secure its own share of water and power before its neighbors do, and almost nobody waits for full regional consensus, because in this system, waiting is treated as losing.

The common thread: political economy of an unequal resource

Three patterns repeat across both regions, and they explain why water disputes are so hard to resolve.

First, geography decides bargaining power before diplomacy even starts. Upstream countries can act unilaterally. Downstream countries can only negotiate, protest, or adapt.

Second, information itself is a form of power. In both the Ganges and Mekong cases, the country holding the data on river flow controls the narrative and the trust of everyone downstream. Whoever measures the water effectively decides what "fair sharing" means.

Third, domestic politics inside one country can freeze an entire international agreement. The Teesta deadlock is not really a Bangladesh-India problem. It is a Delhi-versus-West Bengal problem that Bangladesh happens to be caught inside.

Climate change is now sitting on top of all three patterns and making them worse. Himalayan glaciers are projected to shrink significantly by the end of the century, which means the rivers feeding both South Asia and Southeast Asia will become more erratic, swinging harder between flood and drought. Existing treaties, most of them written decades ago around fixed seasonal averages, were never designed for this kind of unpredictability.

What this means for Bangladesh specifically

Bangladesh's position captures the central tension of political economy: enormous dependence on shared resources, combined with limited direct control over the decisions that shape them. A shrinking dry-season flow affects irrigation and crop cycles across the north. Reduced sediment reaching the delta accelerates coastal erosion and salinity intrusion, threatening both farmland and drinking water sources near the coast. And a treaty expiring in the same year that a new upstream mega-dam project is advancing adds real urgency to Dhaka's diplomatic calendar.

The response Bangladesh has been building is not passive. It includes pushing for joint, verifiable data collection rather than depending on one country's measurements, diversifying diplomatic and investment partners rather than relying on a single upstream neighbor, and treating river management as a long-term national security issue rather than a seasonal talking point. None of these are quick fixes, but they reflect a more realistic reading of how water politics actually works in this part of the world.

The bigger picture

Water disputes rarely make daily headlines the way wars or trade tariffs do, but they shape the daily lives of hundreds of millions of people across South and Southeast Asia. A dry season with less water than expected means real economic loss for farmers who have no say in the treaties written above them. As rivers become less predictable and demand for both food and electricity keeps rising, the countries that build transparent, flexible, and genuinely cooperative water agreements will be the ones best placed to avoid crisis. Those that keep treating water purely as a bargaining chip may find that a resource meant to sustain life instead becomes the region's next flashpoint.