Glacial lake evolution and glacier-lake interactions in the Poiqu River basin, central Himalaya, 1964-2017

Guoqing Zhang*, Tobias Bolch, Simon Allen, Andreas Linsbauer, Wenfeng Chen, Weicai Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Despite previous studies, glacier-lake interactions and future lake development in the Poiqu River basin, central Himalaya, are still not well understood. We mapped glacial lakes, glaciers, their frontal positions and ice flow from optical remote sensing data, and calculated glacier surface elevation change from digital terrain models. During 1964-2017, the total glacial-lake area increased by ~110%. Glaciers retreated with an average rate of ~1.4 km2 a-1 between 1975 and 2015. Based on rapid area expansion (>150%), and information from previous studies, eight lakes were considered to be potentially dangerous glacial lakes. Corresponding lake-terminating glaciers showed an overall retreat of 6.0 ± 1.4 to 26.6 ± 1.1 m a-1 and accompanying lake expansion. The regional mean glacier elevation change was-0.39 ± 0.13 m a-1 while the glaciers associated with the eight potentially dangerous lakes lowered by-0.71 ± 0.05 m a-1 from 1974 to 2017. The mean ice flow speed of these glaciers was ~10 m a-1 from 2013 to 2017; about double the mean for the entire study area. Analysis of these data along with climate observations suggests that ice melting and calving processes play the dominant role in driving lake enlargement. Modelling of future lake development shows where new lakes might emerge and existing lakes could expand with projected glacial recession.

Original languageEnglish
Pages (from-to)347-365
Number of pages19
JournalJournal of Glaciology
Issue number251
Publication statusPublished - 1 Jun 2019
Externally publishedYes


  • central Himalaya
  • future lake development
  • glacier and lake mapping
  • glacier elevation change
  • glacier-lake interaction

ASJC Scopus subject areas

  • Earth-Surface Processes


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