The Jaldhaka River (Bengali: জলঢাকা Jôlḍhaka) is a trans-boundary river, with a length of 192 metres, that originates in southeastern Sikkim in the eastern Himalayas and flows through the Jalpaiguri and Cooch Behar districts of West Bengal, India. A Trans-boundary river is a river that crosses at least one political border either a border within a nation or an International boundary. Sikkim ( Nepali:, also Sikhim) is a Landlocked Indian state nestled in the Himalayas It is the least populous state in India Jalpaiguri ( Bengali:জলপাইগুড়ি is a town in the state of West Bengal, India. Cooch Behar ( is the district headquarters and the largest town of Cooch Behar District in the Indian state of West Bengal. West Bengal ( Bengali: পশ্চিমবঙ্গ Poshchim Bônggo poʃtʃim bɔŋgo is a state in eastern India. India, officially the Republic of India (भारत गणराज्य inc-Latn Bhārat Gaṇarājya; see also other Indian languages) is a country At that point the river enters Bangladesh through the Lalmonirhat District and then joins with the Dharla River until the Dharla debouches into the Brahmaputra River near the Kurigram District. ( Bengali: বাংলাদেশ inc-Latn Bangladesh) officially Lalmonirhat is a district in Northern Bangladesh. It is a part of the Rajshahi Division. The Dharla River ( ধরলা নদী is one of Bangladesh 's Trans-boundary rivers It originates in the Himalayas where it is known as the Jaldhaka The Dharla River ( ধরলা নদী is one of Bangladesh 's Trans-boundary rivers It originates in the Himalayas where it is known as the Jaldhaka Defile is a geographic term for a narrow pass or gorge between mountains or hills The Brahmaputra, also called Tsangpo-Brahmaputra is a Trans-boundary river and one of the major Rivers of Asia. Kurigram is a district in North-Eastern Bangladesh. It is located in the Rajshahi Division. Due to the river's wondering over several international borders, only a small length of the river lies within Bangladesh. [1]
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The Jaldhaka River is formed by the conjunction of three streams at Bindu, the end point of the Jaldhaka Police Station at Darjiling district in West Bengal. The three streams are known as Bindu Khola, Dudh Pokhri and Jaldhaka which originates from the locally named small glacial lake the Kupukh Pokhri. The combined streams meet at Bindu to form the Jaldhaka river thus forming a riverine boundary with India and Bhutan in the left bank. The main tributaries that join the river in its right bank are the Murti, Naksal Khola and the Sutunga in the last course. The Diana is the main right bank tributary. The river flows through the three North Bengal districts of Darjiling, Jalpaiguri and Koch Bihar. The entire watershed is the most fertile agricultural zone along with the Teesta Basin. The Upper course is famous for crops like ginger, medicinal herbs and fruits like oranges and pomegranate. The middle course comprising of Jalpaiguri district is entirely tea and corn dominated and the lower course is dominated by rice, jute and tobacco. The inter river formed lands are cultivated with crops like bamboo and mat sticks. In the lower basin the inter river lands are cultivated with banana.
The river enters Bangladesh at Ghoksadanga district to meet the Brahmaputra or the Jamuna as it is known there.