Why in news
According to a new study, more than 700 million cubic metres of debris have been mobilised in the Sedongpu gully catchment of the Tibetan Plateau since 2017
The combination of long-term warming and intense local shaking due to earthquakes has greatly enhanced landslide activity in the area
Potential consequences
Increased Sedimentation
Mass wasting events have, lead to potential blockages in the Tsangpo (Siang) River and its tributaries.
Increased sediment can raise riverbeds, making the Brahmaputra more prone to flooding.
Higher sedimentation can exacerbate flood risks in Assam and other downstream areas, particularly during monsoons.
Impact on Hydropower Projects
China’s proposed 60-gigawatt dam project on the Tsangpo faces risks from sediment and debris, impacting its operation.
Increased sedimentation could strain existing and planned hydropower projects, affecting their efficiency and safety.
Geological Instability
Frequent landslides and glacier debris flows increase erosion in the Sedongpu Gully, destabilizing the region.
Increased Landslide Activity: The region has seen a surge in landslides since 2017, partly due to warming and seismic activity.
Environmental and Hydrological Effects
Sediment buildup can obstruct river channels, making navigation difficult and affecting local transportation and fishing industries.
Changes in sediment levels and river flow can disrupt local ecosystems and biodiversity in the Brahmaputra basin.
Climate and Weather Influences
The region has experienced significant temperature increases, accelerating mass wasting events and altering weather patterns.
The combination of warming and seismic activity contributes to the region's growing geophysical instability.
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