Assam a beautiful state in Northeast India, is known for its rich geographical diversity and natural beauty. From the mighty Brahmaputra and Barak rivers to lush green hills and dense forests, Assam offers a unique landscape that plays a vital role in its culture, economy, and biodiversity. The state is home to famous national parks like Kaziranga and Manas, which are known worldwide for their wildlife, especially the one-horned rhinoceros.

Rivers of Assam

Assam has more than 50 rivers. These rivers come from Tibet, Bhutan, Arunachal Pradesh, Nagaland, Manipur, and Meghalaya. The two main river systems are:

Brahmaputra River System (North and Central Assam)
Barak River System (South Assam)

The Brahmaputra River -The Mighty Luit

The Brahmaputra is the most important river of Assam.

Origin and Names

Origin: Chemayungdung glacier in Tibet
Tibet: Tsangpo
Arunachal Pradesh: Siang / Dihang
Assam: Brahmaputra / Luit
Bangladesh: Jamuna

Key Facts

Total length: 2,900 km
Length in Assam: 720 km
Flows east to west in Assam
Only major river in India with a male name

Important Features

Majuli: World’s largest river island
Umananda Island: Smallest river island near Guwahati
Very wide river (up to 18 km during floods)

Tributaries

North Bank Rivers:

Subansiri (largest tributary)
Manas
Jia Bharali
Sankosh

South Bank Rivers:

Kopili
Dhansiri
Dihing
Kulsi

The Barak River

The Barak River is the second largest river system in Assam.

Key Facts

Origin: Nagaland-Manipur hills
Length: 564 km
Length in Assam: 221 km
Flows through: Cachar, Hailakandi, Karimganj

Important Point

Splits into Surma and Kushiyara in Bangladesh
Called lifeline of Barak Valley

Tributaries

Sonai
Katakhal
Jiri
Longai

Important Rivers for Exams

Subansiri: Largest tributary of Brahmaputra
Manas: UNESCO site river
Kopili: Hydel project river
Dhansiri: Important for irrigation
Dihing: Flows through Dibru-Saikhowa

National Parks of Assam

1. Kaziranga National Park

Famous for one-horned rhinoceros
Located on Brahmaputra south bank
UNESCO World Heritage Site

2. Manas National Park

Located in western Assam
UNESCO World Heritage Site
Famous for tiger, elephant

3. Dibru-Saikhowa National Park

Located in Tinsukia
Famous for birds and wetlands

4. Nameri National Park

Located in Sonitpur
Famous for rafting and birds

5. Orang National Park

Known as mini Kaziranga
Located on north bank of Brahmaputra

6. Dehing Patkai National Park

Called “Amazon of the East”
Dense rainforest area

7. Raimona National Park

New national park
Located in Kokrajhar

8. Sikhna Jwhwlao National Park

New national Park
Located in Kokrajhar & Chirang district

Hills and Plateaus of Assam

Assam is not only plains, it also has hills.

Major Hills

Karbi Anglong Hills
Dima Hasao (North Cachar Hills)
Barail Range
Patkai Hills

Important Point

Barail Hills divide Brahmaputra and Barak valleys
Hills are rich in forests and minerals

Districts of Assam

Assam has 35 districts (latest updates may change).

Divisions of Assam

Upper Assam: Dibrugarh, Tinsukia, Jorhat
Lower Assam: Barpeta, Nalbari
Central Assam: Nagaon, Morigaon
Barak Valley: Cachar, Hailakandi, Karimganj

Important District Facts

Majuli: River island district
Dibrugarh: Tea city
Guwahati (Kamrup Metro): Largest city

Environment and Floods

Assam faces floods every year due to rivers.

Key Points

40% land is flood-prone
Brahmaputra carries heavy silt
Majuli is shrinking due to erosion
Floods affect crops and people

Important Bridges

Saraighat Bridge: First bridge (1963)
Bogibeel Bridge: Longest rail-road bridge
Dhola-Sadiya Bridge: Longest road bridge in India

Assam’s geography is not only fascinating but also essential for understanding the state’s identity and significance. Its powerful rivers, diverse wildlife, scenic hills, and administrative divisions together shape the life and livelihood of its people. By learning these key geographical features, you can strengthen your general knowledge and improve your performance in exams.

FAQs

Q1. Which is the longest river in Assam?
Brahmaputra River.

Q2. Where does the Brahmaputra River originate?
From the Chemayungdung glacier in Tibet.

Q3. What is the Brahmaputra called in Tibet?
Tsangpo or Yarlung Tsangpo.

Q4. What is the Brahmaputra called in Arunachal Pradesh?
Siang or Dihang.

Q5. Which is the second largest river system in Assam?
Barak River.

Q6. Which districts are covered by the Barak River?
Cachar, Hailakandi, and Karimganj.

Q7. What happens to the Barak River in Bangladesh?
It splits into Surma and Kushiyara.

Q8. Which is the largest tributary of the Brahmaputra?
Subansiri River.

Q9. Which river flows through Manas National Park?
Manas River.

Q10. Which river is famous for the Kopili Hydel Project?
Kopili River.

Q11. Which river flows through Dibru-Saikhowa National Park?
Dihing (Dehing) River.

Q12. Which is the largest river island in the world?
Majuli Island.

Q13. How many national parks are there in Assam?
7 National Parks.

Q14. Which national park is famous for one-horned rhinoceros?
Kaziranga National Park.

Q15. Which national park is a UNESCO World Heritage Site in Assam?
Kaziranga and Manas National Parks.

Q16. Which national park is known as the “Amazon of the East”?
Dehing Patkai National Park.

Q17. Which hills divide Brahmaputra and Barak valleys?
Barail Hills.

Q18. Name two major hill regions of Assam.
Karbi Anglong Hills and Dima Hasao Hills.

Q19. Which is the longest bridge in Assam?
Dhola-Sadiya Bridge (Bhupen Hazarika Setu).

Q20. Why does Assam face floods every year?
Due to heavy rainfall and overflow of the Brahmaputra and its tributaries.

Assam Geography GK: Rivers, National Parks, Hills & Districts

Rivers of Assam