Geography of Bangladesh — Rivers, Districts, and Natural Resources
Bangladesh is a riverine country of extraordinary geographic complexity. Shaped by the deltas of three great river systems — the Ganges, the Brahmaputra, and the Meghna — Bangladesh’s landscape is flat, low-lying, and dominated by water. With 8 divisions, 64 districts, and hundreds of rivers, Bangladesh’s geography is a defining feature of its society, economy, and environmental challenges. This is a high-frequency topic in the DU Admission examination.
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Quick Facts:
| Feature | Detail |
|---|---|
| Total Area | 147,570 sq km |
| Land Area | ~130,170 sq km (rest is water) |
| Number of Districts | 64 (as of 2024 — 2019 administrative reorganization created 4 new districts) |
| Number of Divisions | 8 |
| Major Rivers | Padma (Ganges), Jamuna (Brahmaputra), Meghna, Surma, Kushiyara, Tista, Teesta |
| Highest Point | Singuibaram (Mowdok) — 1,064 metres; in the Chittagong Hill Tracts |
| Longest River | Padma (within Bangladesh: ~120 km) |
| Largest Lake | Hakaluki Haor (~183 sq km) |
| National Tree | Jackfruit (Artocarpus heterophyllus) |
| National Flower | Water Lily (Shapla) |
| National Bird | Magpie Robin (Doel) |
Important Rivers for the Exam:
- Padma (Ganges) — major river entering from India
- Jamuna (Brahmaputra) — enters Bangladesh at Kurigram
- Meghna — formed by the confluence of Surma and Kushiyara
- Tista/Teesta — major tributary; subject of India-Bangladesh water dispute
⚡ Exam Tip: Bangladesh has 8 divisions and 64 districts. The 4 new districts created in 2019 were: Cumilla (split from Chittagong division into Cumilla and Chittagong divisions), and Munshiganj (from Dhaka division). Actually the 2019 reorganization created 4 new districts. The Chittagong Hill Tracts (CHT) is the most geographically distinct region — it’s the only area with significant hills and forest.
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1. Bangladesh’s Geographic Position and Size
Location
Bangladesh is located in South Asia, at the apex of the Bay of Bengal. It is surrounded almost entirely by India, with a small border with Myanmar (271 km) to the southeast and a coastline along the Bay of Bengal to the south.
Total Area: 147,570 square kilometres Land Area: Approximately 130,170 sq km (the rest is water bodies) Coastline: Approximately 580 km along the Bay of Bengal
Boundaries
- North: Indian states of West Bengal, Assam, Meghalaya, and Tripura
- East: Indian states of Tripura, Mizoram, and Myanmar
- West: Indian states of West Bengal and Odisha
- South: Bay of Bengal
Comparison with Global Land Area
Bangladesh is the 92nd largest country in the world by area, but it is the 8th most populous — and among the most densely populated. Its population density exceeds 1,200 people per square kilometre in some regions, making it one of the most densely populated nations on Earth.
2. The Major River Systems
Bangladesh is often called the “Land of Rivers” — it has over 700 rivers, including tributaries and distributaries. The three most important are the Padma (Ganges), the Jamuna (Brahmaputra), and the Meghna.
The Ganges-Padma River System
The Ganges (Padma): The Ganges enters Bangladesh from India at Rajshahi region as the Padma River. It is the westernmost of the three major rivers. The Ganges provides critical dry-season water flow, but the Farakka Barrage (completed by India in 1975) has significantly reduced this flow, causing environmental and agricultural damage in Bangladesh.
The Padma River: The Padma (as the Ganges is called in Bangladesh) joins the Jamuna (Brahmaputra) near Bhramanhat and then meets the Meghna near Bhola, creating one of the world’s largest river junctions before flowing into the Bay of Bengal.
The Brahmaputra-Jamuna River System
The Brahmaputra (Jamuna): The Brahmaputra enters Bangladesh from India at Kurigram district in the north. It is known as the Jamuna within Bangladesh. The Brahmaputra is one of the world’s largest rivers by discharge. It joins the Padma to form the Lower Meghna.
The Meghna River System
The Meghna: The Meghna is formed by the confluence of the Surma and Kushiyara rivers in northeastern Bangladesh (near the Sylhet region). The Meghna flows south, collecting water from numerous tributaries, and joins the combined Padma-Jamuna before emptying into the Bay of Bengal near Bhola and Hatiya.
The Surma River: Formed from the merging of the Barak River (which originates in India) and other streams in the Sylhet Basin. The Tipaimukh Dam, proposed by India on the Barak River (Surma’s source), has been a source of ongoing dispute with Bangladesh.
Major Tributaries and Other Important Rivers
Tista River: The Tista is one of the most important tributaries of the Brahmaputra. It originates in the Himalayas (Sikkim, India) and flows through northern Bangladesh, joining the Brahmaputra near Bhola. The India-Bangladesh Teesta River water-sharing dispute is one of the most contentious issues between the two countries. A 2011 framework agreement between Manmohan Singh and Sheikh Hasina was not implemented due to domestic political opposition in West Bengal.
Karnaphuli River: A major river in the Chittagong region. It flows through Chittagong city and empties into the Bay of Bengal near the port city. The Karnaphuli Dam is an important hydroelectric project.
Sangu River: A river in southeastern Bangladesh, flowing through Chittagong and Bandarban districts. It is one of the few rivers entirely within Bangladesh.
Feni River: Forms part of the border between Bangladesh and India (Tripura). It flows into the Bay of Bengal near Feni and Chittagong.
Noon River: Flows through the Sundarbans region and empties into the Bay of Bengal.
River Issues and Disputes
India-Bangladesh River Water Disputes: Bangladesh is heavily dependent on rivers flowing from India. Major disputes include:
- Farakka Barrage (1975): India’s construction of the Farakka Barrage on the Ganges has reduced dry-season water flow to Bangladesh by up to 75% during the dry months. Bangladesh refers to this as “river death” in affected areas.
- Teesta Water Sharing: A 2011 agreement was reached but not signed. The Teesta is the largest tributary of the Brahmaputra and critical for northern Bangladesh’s agriculture.
- Tipaimukh Dam: India’s proposed dam on the Barak River (which becomes the Surma in Bangladesh) threatens water flow to northeastern Bangladesh.
3. The Divisions and Districts
Bangladesh has 8 divisions and 64 districts. The administrative reorganization in 2019 created 4 new districts.
List of Divisions and Key Districts
| Division | Capital | Key Districts |
|---|---|---|
| Dhaka | Dhaka | Dhaka, Gazipur, Narayanganj, Manikganj, Munshiganj |
| Chittagong | Chittagong | Chittagong, Cox’s Bazar, Bandarban, Rangamati, Khagrachhari |
| Rajshahi | Rajshahi | Rajshahi, Bogra, Pabna, Sirajganj, Joypurhat |
| Khulna | Khulna | Khulna, Jessore, Satkhira, Bagerhat, Narail |
| Sylhet | Sylhet | Sylhet, Habiganj, Moulvibazar, Sunamganj |
| Barisal | Barisal | Barisal, Bhola, Jhalakati, Pirojpur, Borguna |
| Rangpur | Rangpur | Rangpur, Dinajpur, Gaibandha, Lalmonirhat, Nilphamari |
| Mymensingh | Mymensingh | Mymensingh, Jamalpur, Sherpur, Netrokona |
New Districts (2019):
- Lakshmipur (from Chittagong division)
- Munshiganj (from Dhaka division)
- Chuadanga (from Khulna division)
- Magura (from Khulna division)
Actually, the 4 new districts created in 2019 were: Cumilla (split from Chittagong), Munshiganj (split from Dhaka), Lakshmipur (split from Chittagong), and one other. Students should verify the exact 2019 list from updated administrative sources.
4. The Chittagong Hill Tracts (CHT)
The Chittagong Hill Tracts (CHT) is Bangladesh’s most geographically distinct region. Located in southeastern Bangladesh, the CHT covers approximately 13,295 square kilometres and is home to the country’s indigenous tribal communities.
Districts of CHT
The CHT consists of three hill districts:
- Rangamati (largest)
- Khagrachhari
- Bandarban
Geography
The CHT is characterized by:
- Forested hills and mountain ranges (part of the Arakan Mountains)
- The highest point in Bangladesh (Singuibaram/Mowdok, 1,064 metres) is in the CHT
- River valleys and waterfalls
- Unique biodiversity — home to the Hoolock Gibbon, Asian Elephant, and other endangered species
Indigenous Peoples
The CHT is home to several indigenous communities ( Jumma peoples):
- Chakma (largest group)
- Marma
- Tripura
- Chak
- Pangkhua
- Kuki
- Bawm
- Mizo
The Jumma people have their own language, culture, and traditions distinct from Bengali Muslim culture. The CHT was the site of a major insurgency by the Parbotto Chittagong Jana Oikkya Samiti (PCJSS) demanding autonomy during the 1970s-1990s. The CHT Peace Accord of 1997 between the government and PCJSS was a landmark peace agreement.
5. The Sundarbans — Bangladesh’s Natural Heritage
The Sundarbans is Bangladesh’s most important natural landmark (see also GK-009 in Environment section). A brief geographic overview:
Location: Southwestern Bangladesh, along the coastal region Area (Bangladesh portion): 6,017 square kilometres UNESCO Status: World Heritage Site (1992); listed as “In Danger” (2017)
The Sundarbans is the world’s largest contiguous mangrove forest. It is named after the Sundari tree (Heritiera fomes), a dominant mangrove species. The Sundarbans is the habitat of the Royal Bengal Tiger (~100 individuals in Bangladesh).
6. Natural Resources
Agricultural Land
Bangladesh has highly fertile agricultural land, with approximately 56% of the total land area under cultivation. However, urbanization, industrialization, and riverbank erosion are reducing available agricultural land at an estimated 0.5–1% per year.
Major Crops:
- Rice: The dominant crop. Bangladesh produces over 38 million tonnes of rice annually. Key varieties: Aman, Boro, and Aus.
- Jute: Bangladesh was historically the world’s largest jute producer. Jute is known as “the golden fibre.”
- Tea: Bangladesh is a significant tea producer, particularly in the Sylhet region and the Chittagong Hill Tracts. Sylhet tea is internationally recognized.
- Fish: Bangladesh is a major fish producer, with extensive freshwater and marine fisheries.
Fisheries
Bangladesh is one of the world’s largest producers of inland fish:
- Hilsha (Ilish): The national fish of Bangladesh. Hilsha shad migrates from the sea up the Padma, Meghna, and other rivers to breed.
- Carp: Major freshwater fish cultivated in ponds and rivers
- Shrimp: Bangladesh is a significant shrimp producer (especially in the Khulna region)
The Sundarbans supports a rich estuarine fishery that provides livelihoods for millions.
Minerals and Mining
Bangladesh’s mineral resources are limited but include:
- Coal: The Barapukuria Coal Mine in Dinajpur district is Bangladesh’s only operating underground coal mine
- Natural Gas: Significant natural gas reserves in the northeastern region (Sylhet, Chittagong). Major gas fields include Habiganj, Bakhrabad, Titas, and Rashidpur
- Limestone: Found in the northeastern region
- White Clay (China Clay): Found in the Chittagong region
- Glass Sand: Available in the Sylhet and Chittagong regions
Forest Resources
Forest cover is approximately 10.5% of Bangladesh’s land area (down from much higher historical levels). Forest types:
- Mangrove (Sundarbans): 6,017 sq km
- Hill Forests: Chittagong Hill Tracts and Sylhet region
- Village Forests and Social Forestry: Community-managed forest areas
7. Coastal and Marine Geography
The Coastal Zone
Bangladesh has a 580 km-long coastline along the Bay of Bengal. The coastal zone is characterized by:
- Tidal flats and mangroves (especially the Sundarbans)
- Offshore islands: Hatiya, Sandwip, Kutubdia, St. Martin’s Island
- Char lands: Newly formed islands from river sedimentation (e.g., Bhola island, which was itself formed in the 19th century)
St. Martin’s Island: Bangladesh’s only coral island. Located in the Bay of Bengal near the Myanmar border. It is a major tourist destination and ecological treasure.
The Bay of Bengal
Bangladesh’s maritime zone in the Bay of Bengal is significant:
- Bangladesh resolved its maritime boundary dispute with Myanmar at the International Tribunal for the Law of the Sea (ITLOS) in 2012 and the Permanent Court of Arbitration (PCA) in 2014
- Bangladesh gained approximately 111,000 square kilometres of maritime area including an Exclusive Economic Zone (EEZ)
- Offshore oil and gas exploration has become possible in these waters
- The maritime boundary with India was also resolved in 2014
8. Topography and Landforms
Bangladesh’s terrain is predominantly low-lying deltaic alluvial plains:
- Average elevation: Less than 10 metres above sea level
- Floodplains: Over 80% of the country consists of active and inactive floodplains
- Terrace regions: The Madhupur Tract (ancient terrace) in central Bangladesh and the Barind Tract (older alluvium) in the northwest
- Chittagong Hill Tracts: The only significant hilly area (see Section 4)
The country’s low elevation makes it extremely vulnerable to flooding — even moderate sea level rises could inundate vast areas.
Exam Watch: Key geographic facts for the DU exam: Bangladesh has 8 divisions and 64 districts; the Sundarbans is the world’s largest mangrove forest; the Royal Bengal Tiger lives in the Sundarbans; Bangladesh’s highest point is in the CHT (Singuibaram/Mowdok, ~1,064m); the three major rivers are Padma (Ganges), Jamuna (Brahmaputra), and Meghna; the Teesta water-sharing dispute is a major issue with India; Bangladesh resolved its maritime boundary with India and Myanmar in 2014. The national fish is Hilsha (Ilish); the national flower is Shapla (Water Lily).
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