Raidāk River, Trans-boundary river in Alipurduar District, India and Kurigram District, Bangladesh.
The Raidāk River originates in Bhutan and flows through Alipurduar District in India before merging with the Brahmaputra River in Kurigram District, Bangladesh. Along its course, the river creates distinct geographic features and serves as a natural boundary across the region.
Construction of the Chukha hydroelectric project began in 1974 as a major infrastructure initiative between India and Bhutan. This development reshaped how the river was managed and represented an important step in regional cooperation.
The river carries different names across the regions it flows through, called Wang Chhu in Bhutan and Raidāk by local communities downstream in India and Bangladesh. These varying names reflect how the waterway connects different peoples and their relationships with the land.
The river passes through areas with varying seasonal conditions, experiencing different temperatures and significant rainfall during monsoon months. Travelers planning to visit the region should check seasonal weather patterns and adjust their visit timing accordingly for safer access to riverine areas.
Within Alipurduar District, the river naturally divides to create an island called Mainagaon before its waters rejoin downstream. This shifting formation demonstrates how the river continuously reshapes the landscape through its flow.
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