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Morphometric Analysis of Mangdechu River and Threat to Manas

Mansi Ghunawat*, Durgesh Dwivedi

In the globalized world, we cannot remain unaffected by each other. A similar rule is applied when dams are built on a tran’s boundary river. Every country has a right to use its resources potentially but to ensure sustainability; it must keep in mind, the interests of low riparian countries as well. A dam in the upper riparian river might act as a water bomb affecting flora and fauna living in the lower riparian. Mangdechu river lies in Bhutan but its impact on Manas national park was seen when it caused flash floods in the UNESCO site in 2016 affecting 30,000 people in Assam, damaging 24 houses, and submerging 1000 hectares of cropland. Flowing in the young Himalayas, with high ruggedness index, and uneven and steep slopes, the Mangdechu river has a high potential of bringing such havoc again. The gravity of the situation increases when the 750 MW project Mangdechu is built which is located close to Manas national park and again a potential threat. Being proactive, we must find a way to deal with water related data sharing issues.