The Dharla River ( bn, ধরলা নদী, translit=Dhorola nodi) is a tributary of

Brahmaputra The Brahmaputra is a trans-boundary river which flows through Tibet, northeast India, and Bangladesh. It is also known as the Yarlung Tsangpo in Tibetan, the Siang/Dihang River in Arunachali, Luit in Assamese, and Jamuna River in Bangla. I ...

which is a trans-boundary river flowing through

India India, officially the Republic of India ( Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the ...

Bhutan Bhutan (; dz, འབྲུག་ཡུལ་, Druk Yul ), officially the Kingdom of Bhutan,), is a landlocked country in South Asia. It is situated in the Eastern Himalayas, between China in the north and India in the south. A mountai ...

and

Bangladesh Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world, with a population exceeding 165 million pe ...

. It originates from Kupup/Bitang lake lying in

Pangolakha Wildlife Sanctuary Pangolakha Wildlife Sanctuary (Pron: pǽngólɑ́kha, Nepali: पाङ्लखा) is a wildlife reserve in the Pakyong District of the state of Sikkim in India. It is about east of Rorathang and about by road from Rangpo city. The total no ...

East Sikkim Gangtok District, formerly the East Sikkim district, is an administrative district of the Indian state of Sikkim. It was renamed in 2021 as a result of administrative reorganisation of the state, which also saw three subdivisions of the East Si ...

Himalayas The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over ...

where it is known as the Jaldhaka River, and then it flows through

than goes to

Samtse District Samtse District ( Dzongkha: བསམ་རྩེ་རྫོང་ཁག་; Wylie: ''Bsam-rtse rdzong-khag''; older spelling "Samchi") is one of the 20 dzongkhags (districts) comprising Bhutan. It comprises two subdistricts (''dungkhags''): ...

and comes back to

again at

Kalimpong district Kalimpong district is a district in the state of West Bengal, India. Originally known as Dalingkot tehsil, the region was alternatively under the control of Sikkim and Bhutan. In 1865, it was annexed from Bhutan by British India under the Treat ...

than it flows through

Jalpaiguri Jalpaiguri is a city in the Indian state of West Bengal. It is the headquarters of the Jalpaiguri district as well as of the Jalpaiguri division of West Bengal, covering the jurisdiction of the five districts of North Bengal. The city is loc ...

and

Cooch Behar Cooch Behar (), or Koch Bihar, is a city and a municipality in the Indian state of West Bengal. It is the headquarters of the Cooch Behar district. It is in the foothills of the Eastern Himalayas at . Cooch Behar is the only planned city in t ...

districts of

West Bengal West Bengal (, Bengali: ''Poshchim Bongo'', , abbr. WB) is a state in the eastern portion of India. It is situated along the Bay of Bengal, along with a population of over 91 million inhabitants within an area of . West Bengal is the four ...

, one of the seven main rivers to do so. Here the river enters Bangladesh through the

Lalmonirhat District Lalmonirhat ( bn, লালমনিরহাট জেলা, ''Lalmonirhat Jela'' also ''Lalmonirhat Zila'') is a district, situated at the northern border of Bangladesh. It is a part of the Rangpur Division. Lalmonirhat mahakuma was establish ...

and flows as the Dharla River until it empties into the

Brahmaputra River The Brahmaputra is a trans-boundary river which flows through Tibet, northeast India, and Bangladesh. It is also known as the Yarlung Tsangpo in Tibetan, the Siang/Dihang River in Arunachali, Luit in Assamese, and Jamuna River in Bangla. I ...

near the

Kurigram District Kurigram District ( bn, কুড়িগ্রাম) is a district of Bangladesh in the Rangpur Division. The district is located in northern Bangladesh along the country's border with India. Under Indian rule, the area was organized as a mahak ...

. Near Patgram Upazila, it again flows easterly back into India. It then moves south and enters Bangladesh again through Phulbari Upazila of Kurigram District and continues a slow meandering course. The average depth of river is and maximum depth is , in origin of

Kurigram Kurigram District ( bn, কুড়িগ্রাম) is a district of Bangladesh in the Rangpur Division. The district is located in northern Bangladesh along the country's border with India. Under Indian rule, the area was organized as a mahakum ...

. Erosion by the rivers Dharla and Jamuna took a serious turn in Lalmonirhat in 2007. In Lalmonirhat, about of a long

flood control Flood control methods are used to reduce or prevent the detrimental effects of flood waters."Flood Control", MSN Encarta, 2008 (see below: Further reading). Flood relief methods are used to reduce the effects of flood waters or high water level ...

embankment was devoured by the Dharla. Three mosques, two temples, a madrassah and a primary school, and a vast tract of cultivable land with crops were devoured by the river, rendering about three thousand people homeless. There is a park beside the Dharla at Kurigram. There also is a bridge. The river is full during the

monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal osci ...

season but has only knee-deep water in summer. Deposition of silt has led to the formation of many small islands (chars) in the river.

Floods

River Dharla, along with River Teesta have created major flooding multiple times in

during

season between June to September.

References

{{Rivers in and around Bengal Rivers of Bangladesh Rivers of West Bengal International rivers of Asia Rivers of Sikkim Rivers of India Rivers of Rangpur Division Rivers of Kalimpong district Tributaries of the Brahmaputra River