The Bangla World: The Politics of Silt, Water and the Bay

Geography Before the Map

Bangladesh's future will be decided less on the battlefield or in parliament than upstream on its rivers, in the accounting of its silt and in the waves of the Bay.

For five decades our political debate has circled one question: are we Bengali, or are we Bangladeshi? One side has looked for the answer in language, the other in religion and territory. Both answers have historical reasons behind them. But both have almost forgotten something older than language and older than faith: the land itself.

So the name proposed here for our civilization is Bangla civilization, and the name for our world is the Bangla world. It is a geographic and historical space that stretches from the foothills of the Himalayas to the Bay of Bengal. The prehistoric Bengal Basin, the Bengal Delta built from the silt of the Ganges, the Brahmaputra and the Meghna, and the Bay of Bengal with its thousands of years of history have together shaped our lives, our society and our culture.

This is not a demand to redraw the map, nor a wish to cross any border. It is a way of seeing. As a state, Bangladesh is sovereign and bounded. Yet whether it lives or dies depends on mountains, glaciers, rivers and a sea that lie beyond those borders. To talk about sovereignty without understanding that dependence is to say only half of what needs saying.

The Land the Rivers Made

Long before Bangladesh was a country, it was a basin. Geologically, most of the country sits within the Bengal Basin. The Indian Plate broke away from Antarctica, drifted north and collided with the Eurasian Plate, and in the low trough left by that collision, silt has settled for millions of years. The basin holds sedimentary layers roughly 20 kilometres thick.

Today's Bengal Delta sits on top of that old trough. Formed where the Ganges and the Brahmaputra meet, it is considered the largest delta basin in the world. Every year the rivers carry more than a billion tonnes of sediment down from the Himalayas and the surrounding hills. That silt is our soil, our rice, our chars and the new land rising along our coast.

But this is also where Bangladesh's basic weakness lies. The Ganges-Brahmaputra-Meghna basin covers about 1.7 million square kilometres. Only 7 percent of it lies inside Bangladesh.

Country	Share of the basin
India	64%
China	18%
Nepal	9%
Bangladesh	7%
Bhutan	3%

In other words, 93 percent of the land that feeds the water and silt we live on is in the hands of other states. Bangladesh has 57 transboundary rivers: 54 shared with India and 3 with Myanmar. Of the water that crosses the border, about 54 percent comes through the Brahmaputra, 31 percent through the Ganges and about 14 percent through the tributaries of the Meghna.

One plain conclusion follows from these numbers. Bangladesh is a downstream country. Whatever anyone does upstream, the people downstream will live with the result. Geography is not destiny here, but no political decision made without understanding geography will last.

The Bay of Bengal: A Window a Thousand Years Old

The Bangla world was never a closed room. Its door opened not onto the mountains in the north but onto the sea in the south. The Bay of Bengal covers roughly 2.17 million square kilometres, making it the largest bay on earth.

The clearest evidence of this sea-facing history is Wari-Bateshwar in Narsingdi. Archaeologists from Jahangirnagar University have found traces of a fortified town there, planned roads and large numbers of punch-marked silver coins. From the rouletted pottery and the many kinds of glass and stone beads found at the site, researchers believe the settlement traded with the Roman and Southeast Asian worlds. Some identify it with Sounagoura, the trading town named in Ptolemy's geography, though that identification is not yet settled.

Since ancient times, direct sea routes ran from the ports of Bengal to Southeast Asia, and merchants from other parts of India used these ports too. Later, under the Bengal Sultanate and the Mughals, Chittagong and Sonargaon became centres of this maritime trade. Muslin, rice, salt and sugar went out to the world along these routes.

Independent Bangladesh made this sea legally its own only a little over a decade ago. After its maritime boundary disputes were settled, with Myanmar at the International Tribunal for the Law of the Sea in 2012 and with India at the Permanent Court of Arbitration in 2014, Bangladesh secured more than 111,000 square kilometres of the Bay. Yet it still lags in using that sea. Of its 26 offshore blocks, 23 lie idle, while neighbouring India and Myanmar push ahead with exploration.

A nation whose history was written on the sea now sits with its back to it. That is the first correction the idea of the Bangla world asks us to make: we face south, not north.

Dams Upstream: From Farakka to Medog

Upstream on each of our three great rivers, there is now a structure, built or planned, that Bangladesh does not control. A dam is not just engineering. Whoever holds back the water and lets it go holds the power.

Structure	River	Controlled by	Status	Risk for Bangladesh
Farakka Barrage	Ganges	India	In operation since 1975	Lower dry-season flow; salinity in the Gorai and the Sundarbans
Gajoldoba Barrage	Teesta	India	In operation	Irrigation crisis in the north; a water-sharing deal still unsigned
Tipaimukh Dam	Barak (source of the Meghna)	India	Proposed	Flows in the Surma-Kushiyara and the haor wetlands
River-linking project (Manas-Sankosh-Teesta-Ganga)	Brahmaputra tributaries	India	Planned	Diverting Brahmaputra water into the Ganges basin
Medog Hydropower Project	Yarlung Tsangpo (Brahmaputra)	China	Under construction since 2025	Unknown effects on flow and silt
Lower Siang Dam	Siang (Brahmaputra)	India	Proposed	A counter-reservoir to Medog; double control upstream

Farakka is our old wound. Commissioned in 1975, the barrage was built to divert Ganges water into the Hooghly and keep the port of Calcutta navigable. The Padma, the Gorai and the southwest coast have paid the price.

The new wound is coming from the north. China approved the Medog hydropower station in December 2024, and construction began in 2025 with Chinese Premier Li Qiang in attendance. Its planned capacity is 60,000 megawatts, nearly three times that of the Three Gorges Dam. Before the river leaves Tibet for India, it drops about 2,000 metres, and that drop is the source of the project's power. Bangladesh has formally asked China for four technical documents, including an environmental impact assessment.

Experts do not agree on how large the risk is, and that disagreement is worth knowing. According to Malik Fida A Khan, executive director of CEGIS, 70 percent of the dry-season flow passing through Bangladesh comes via the Brahmaputra, and more than half of the country's silt is carried by the same river. A geologist from Assam, on the other hand, argues that Tibet's Yarlung Tsangpo contributes only around 5 percent of the Brahmaputra's total flow in Bangladesh, with the rest coming from India's monsoon catchment. So Medog's direct effect on water may be limited. But trapped silt, a giant reservoir in an earthquake zone and India's counter-dam together form a chain, and Bangladesh sits at the far end of it.

One thing is clear. The two great powers upstream are entering a contest over water between themselves, and the country downstream has no seat at that table.

The Ganges Treaty 2026: The Clock Is Ticking

As these lines are written, Bangladesh's only legal safeguard for its water security has less than two months left to run. The 30-year Ganges Water Sharing Treaty, signed on 12 December 1996, expires on 12 December 2026.

The treaty was a diplomatic success in its day, but its foundation was weak. The sharing formula was based on flow records from 1949 to 1988, which no longer fit today's climate or today's demand. The only real guarantee was 35,000 cusecs in three alternating ten-day periods during the most critical stretch, from 11 March to 10 May.

This time Bangladesh is not asking merely for renewal. It wants a new treaty. Water Resources Minister Shahiduddin Chowdhury Anee has said that the guarantee clause in the five-year agreement of 1977 was dropped in 1996, and that restoring it is now Dhaka's top priority. Under that 1977 provision, Bangladesh was assured at least 80 percent of its scheduled share even when the flow fell.

Delhi's position is restrained and vague. India's foreign ministry keeps saying the matter will be discussed within the existing framework of the Joint Rivers Commission. There are obstacles inside India as well. The Janata Dal (United), a key ally of the Modi government, has opposed renewal and called for fresh negotiations. For years, the West Bengal state government was also a major domestic hurdle. According to Indian media reports, Delhi has spoken of its own growing need for water, and any new treaty may run for a shorter term of 10 to 15 years.

The biggest lesson, though, lies elsewhere. Of the 54 rivers Bangladesh shares with India, only the Ganges has a detailed water-sharing treaty. A limited understanding was reached on the Kushiyara in 2022, and the Teesta agreement has still not been signed. Malik Fida Khan is right to say that talks must look beyond the Farakka point to the water of the entire Ganges basin. Bargaining while standing under a single barrage and bargaining as a stakeholder in the whole basin are not the same thing.

Climate, Salt and the Advancing Sea

Fresh water from upstream is shrinking, and salt water from downstream is climbing in. Bangladesh is caught between these two pressures, and each one makes the other worse.

About two-thirds of the country lies less than 5 metres above sea level. A study based on some 25 years of satellite data from NASA and China's space agency found that along parts of the Bangladesh coast, the sea is rising more than 60 percent faster than the global average, and that at current rates more than a million people may be displaced by 2050.

But salt will arrive before the sea does. According to a World Bank study, soil salinity on the coast could rise by an average of 26 percent by 2050, and by more than 55 percent in the worst-hit areas. In upazilas where salinity crosses the critical threshold, rice yields would fall by about 15.6 percent. In some coastal areas where farmers once grew three rice crops a year, salt now allows only one.

This is where water politics and climate politics become one. When less fresh water comes down the Ganges in the dry season, not enough flow reaches the southwest through the Gorai, and the salt pushes further inland. The Farakka question, then, is not only a question about the Padma. It is about the Sundari trees of the Sundarbans, the drinking water of Khulna and the rice fields of Satkhira.

People displaced by climate end up in the slums of Dhaka and Chittagong. A decision taken at a barrage upstream thus reaches all the way into the capital's urban planning, its labour market and its political instability. That water, environment and the sea will shape our political future is not a theory. It is already happening.

The Geopolitics of the Bay

For decades, world politics treated the Bay of Bengal as a neglected backyard. Today it is one of the centres of Indo-Pacific rivalry. In the words of American military analysts, this bay at the meeting point of South and Southeast Asia is at once a divider, a connector and a possible battleground.

Three major powers are present here in three different ways. For India, the Bay is a central driver of its Indo-Pacific policy, and its watch extends from the Andaman and Nicobar Islands to the Strait of Malacca. For China, it offers an alternative route into the Indian Ocean that bypasses Malacca, with one end on Myanmar's Rakhine coast. The United States and its allies want to expand their influence through the framework of a "free and open Indo-Pacific."

Bangladesh sits in the middle of this triangle, yet its own sea power is weak. Despite being one of the world's largest garment exporters, the country failed to complete a single deep-sea port in 50 years of independence, a point one analysis singled out in 2022. Matarbari is now the attempt to fill that gap.

Water and sea are moves on the same chessboard, and the Teesta Master Plan shows it clearly. During Prime Minister Tarique Rahman's visit to China in June 2026, the two countries agreed on a joint feasibility study. Some inside the foreign ministry believe that bringing China into the Teesta could become leverage in future water talks, since several Bangladeshi rivers also rise in China. Critics warn, however, that a Chinese presence close to India's Siliguri Corridor, the so-called chicken's neck, could create fresh tension with Delhi.

In this reality, the question for Bangladesh is not which side to join. The question is whether we have the strategic capacity to turn the rivalry of three powers to the advantage of our own water, our ports and our marine resources.

The Limits of Language and Religion as Nationalism

Both Bengali and Bangladeshi nationalism did their work in their own time. But when they reach the question of the rivers, both stop at the same place.

The Awami League's Bengali nationalism saw sovereignty through the lens of 1971, grounded in a cultural identity shared with India. The BNP's Bangladeshi nationalism saw it through the lens of territory: defined by the people inside the borders, not by kinship beyond them. The weakness of the first was that it mistook cultural closeness with a neighbour for shared interest. The weakness of the second was that it kept looking inward at the border, while 93 percent of the sources of our water lie outside it.

The history of the Ganges treaty itself exposes the limits of language-based nationalism. The state that for years stood as the treaty's biggest obstacle was West Bengal, whose people also speak Bangla. The language is the same, but the interests in Farakka's water are not. A river does not ask anyone's mother tongue.

Religion-based nationalism offers no answer here either. The Medog dam in Tibet and the Tipaimukh dam on the Barak will not release water according to anyone's faith. Analysts warn instead that if Hindutva groups in West Bengal and Islamist groups in Bangladesh feed off each other, minorities on both sides of the border will become more exposed. And this basin is not home only to Bengali Muslims and Hindus. The Chakma, the Marma, the Garo, the Santal, the Rajbanshi and the Assamese all drink from the same rivers.

In fairness, the opposing argument should be stated too. Supporters of language- and religion-based nationalism would say that holding a state together takes the glue of feeling, and that language and faith are that glue; nobody takes to the streets for geography. This argument is not one to dismiss. So rather than rejecting these nationalisms, it is better to say they are not enough. Identity can build a nation, but identity cannot secure a fair share of the water.

The Character of Bangla Civilization: An Outline for a New Politics

The central lesson of Bangla civilization is learning to live on terms with the river. For a thousand years, the people of this delta have seen the flood not as an enemy but as a season. When a char washed away, they built their homes on a new one. They saw the sea not as a wall but as a road. Flexibility, plurality and a face turned outward: these three make up the civilizational character of the Bangla world.

To turn this character into politics, a few things have to change:

1. Put water at the centre of national security. Water is no longer just the business of the Ministry of Water Resources. It belongs jointly to foreign affairs, defence, agriculture and urban planning. We need a permanent, non-partisan water security framework that does not change when governments do.
2. Move from the barrage to the basin. Bilateral talks get stuck at a single point. Bangladesh must press for a multilateral, basin-wide framework that brings in Nepal, Bhutan, India and China, and it must frame its claims in the language of international water law.
3. Sovereignty over data. No one can bargain on the strength of figures supplied by the upstream country. Without investment in our own flow monitoring, satellite analysis and hydrological research, we will walk into every negotiation holding someone else's numbers.
4. A sea-facing economy and defence. The maritime boundary was won, but the sea has not been used. Deep-sea ports, offshore exploration, fisheries management and a modern coast guard and navy are threads of the same rope.
5. Multi-directional diplomacy. Not falling into the orbit of Delhi, Beijing or Washington, but building interest-based ties with each, with water and the sea as permanent items on the agenda.
6. An inclusive identity. A citizen of the Bangla world is anyone who lives in this delta and has a stake in its future, whatever their language or faith. The history of this land, from Wari-Bateshwar to the Sundarbans, belongs in the school curriculum, so that a new generation knows itself as heir to the rivers and the sea.
7. Bring climate adaptation into the mainstream of development. Salt on the coast, eroding chars and climate migration are not separate projects. They are the development politics of the coming years.

None of these ideas belongs to any one party. If Bangladesh-first politics truly means "Bangladesh first," then the first definition of that Bangladesh should be this: a country of rivers, silt and sea.

Final Word

Our politics has so far fought over the past: 1947 or 1971, Bengali or Bangladeshi. That fight is not meaningless, but it is incomplete. The fights of the future will take place in the gorges of Tibet, at the gates of Farakka, on the chars of the Teesta and in the salty waves of the Bay of Bengal. No slogan of language and no flag of faith will win them alone.

The idea of Bangla civilization and the Bangla world is therefore not a romantic longing for the past. It is a realist claim: a land made of silt must do its politics by the reckoning of silt. Geography gave us birth. If we fail to understand it, geography will take our future away.

Sources

1. Teachers' Portal (teachers.gov.bd): Mineral resources
2. Imam & Hussain, A review of hydrocarbon habitats in Bangladesh
3. OSTI: Tectonics and petroleum prospects in Bangladesh
4. India Water Portal: Water sharing, beyond economic concerns
5. The Financial Express: Bangladesh Delta Plan 2100
6. Guinness World Records: Largest bay by area
7. Archaeology: Wari-Bateshwar
8. Bangladesh.com: Wari-Bateshwar
9. JATI: Tracing early maritime Southeast Asia and Bengal's contact
10. Dhaka Tribune: Offshore exploration stalls
11. Asia News Network: Bangladesh concern over Brahmaputra dam
12. Open Magazine: The Mother of All Mega-Dams
13. Arise: China begins building world's largest dam
14. EastMojo: Lecture on the Tsangpo dam
15. Lowy Institute: Medog mega-dam
16. ThePrint: Ganges Water Treaty irritant
17. bdnews24: Bangladesh wants revised Ganges deal
18. Dhaka Tribune: Anee expects new treaty
19. ISAS, NUS: The Ganga Waters Treaty
20. Asia News Network: Future of the Ganges Waters Treaty
21. Daily Observer: Uncertainty of water sharing
22. GetMarks: Treaty explainer
23. Arab News: Sea swamps Bangladesh
24. World Bank: Salinity intrusion
25. World Bank blog: River salinity
26. Frontier Weekly: Sea-level is rising
27. War on the Rocks: The Bay of Bengal and the Indo-Pacific
28. ORF: India, Europe and the Bay of Bengal
29. Daily Observer: Teesta feasibility study
30. Daily Observer: China to send experts for Teesta
31. CPR India: Not Dilli, Not Pindi
32. East Asia Forum: Bangladesh's rightward shift

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