Abstract
<strong class="journal-contentHeaderColor">Abstract.</strong> Following the 130 10<sup>6</sup> m<sup>3</sup> detachment of the Sedongpu Glacier (south-eastern Tibet) in 2018, the Sedongpu valley<br />underwent drastic and rapid large-volume landscape changes. Between 2018 and 2022, and in particular during summer<br />2021, an enormous volume of in total ~335±5 10<sup>6</sup> m<sup>3</sup> was eroded from the former glacier bed, forming a new canyon of up<br />to 300 m depth, 1 km width and almost 4 km length. The mass was transported into the Yarlung Tsangpo (Brahmaputra)<br />River and further. Several rock-ice avalanches of in total ~150±5 10<sup>6</sup> m<sup>3</sup> added to the total rock, sediment and ice volume of<br />over 0.6 km<sup>3</sup> that were exported from the basin since around 2017.
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