TY - JOUR
T1 - Evaluating the scale and potential of GLOF in the bhutan himalayas using a satellite-based integral glacier-glacial lake inventory
AU - Nagai, Hiroto
AU - Ukita, Jinro
AU - Narama, Chiyuki
AU - Fujita, Koji
AU - Sakai, Akiko
AU - Tadono, Takeo
AU - Yamanokuchi, Tsutomu
AU - Tomiyama, Nobuhiro
N1 - Funding Information:
Acknowledgments: This work was in part conducted for the ‘Study on Glacial Lake Outburst Floods in the Bhutan Himalayas’ project under the Science and Technology Research Partnership for Sustainable Development (SATREPS) supported by the Japan Science and Technology Agency and the Japan International Cooperation Agency. Many thanks to the two anonymous reviewers for their suggestions and the editor.
Publisher Copyright:
© 2017 by the authors.
PY - 2017/9
Y1 - 2017/9
N2 - A comprehensive glacier-glacial lake inventory was developed for the Bhutan Himalayas based on satellite observations between 1987-1990 and 2006-2011. In total, 733 lakes (covering 82.6 km2) were delineated between 4000 and 6000 m a.s.l. and their relationships to associated glaciers were documented. Using this new inventory, the scale and potential for glacial lake outburst flooding (GLOF) based on multiple criteria was examined. This included a history of connectivity characteristics of glacial lakes to mother glaciers, potential flood volumes, and debris-cover of mother glaciers in addition to the conventional criteria of expansion rate and lake size. The majority of the lakes with high expansion rates (more than double in size) and large areas (>0.1 km2) met the conditions of being continuously in contact with a mother debris-covered glacier for nearly 20 years. Based on these multiple criteria, two lakes were identified as having potential for large-scale GLOF. Potentially dangerous glacial lakes listed in the International Centre for Integrated Mountain Development (ICIMOD) study were re-visited, and some overlaps with the glacier-glacial lake inventory were found.
AB - A comprehensive glacier-glacial lake inventory was developed for the Bhutan Himalayas based on satellite observations between 1987-1990 and 2006-2011. In total, 733 lakes (covering 82.6 km2) were delineated between 4000 and 6000 m a.s.l. and their relationships to associated glaciers were documented. Using this new inventory, the scale and potential for glacial lake outburst flooding (GLOF) based on multiple criteria was examined. This included a history of connectivity characteristics of glacial lakes to mother glaciers, potential flood volumes, and debris-cover of mother glaciers in addition to the conventional criteria of expansion rate and lake size. The majority of the lakes with high expansion rates (more than double in size) and large areas (>0.1 km2) met the conditions of being continuously in contact with a mother debris-covered glacier for nearly 20 years. Based on these multiple criteria, two lakes were identified as having potential for large-scale GLOF. Potentially dangerous glacial lakes listed in the International Centre for Integrated Mountain Development (ICIMOD) study were re-visited, and some overlaps with the glacier-glacial lake inventory were found.
KW - ALOS
KW - Glacial lake inventory
KW - Glacier inventory
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U2 - 10.3390/geosciences7030077
DO - 10.3390/geosciences7030077
M3 - Article
AN - SCOPUS:85028754814
SN - 2076-3263
VL - 7
JO - Geosciences (Switzerland)
JF - Geosciences (Switzerland)
IS - 3
M1 - 77
ER -