Your search found 2 records
1 Steiner, J. F.; Gurung, T. R.; Joshi, S. P.; Koch, I.; Saloranta, T.; Shea, J.; Shrestha, A. B.; Stigter, E.; Immerzeel, W. W. 2021. Multi-year observations of the high mountain water cycle in the Langtang Catchment, Central Himalaya. Hydrological Processes, 35(5):e14189. [doi: https://doi.org/10.1002/hyp.14189]
Hydrological cycle ; Mountains ; Catchment areas ; Observation ; Precipitation ; Snow cover ; Glaciers ; Temperature ; Meteorological stations / Nepal / Langtang Catchment / Central Himalaya
(Location: IWMI HQ Call no: e-copy only Record No: H050411)
https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.14189
https://vlibrary.iwmi.org/pdf/H050411.pdf
https://vlibrary.iwmi.org/pdf/H050411.pdf
(1.22 MB) (1.22 MB)
The Langtang catchment is a high mountain, third order catchment in the Gandaki basin in the Central Himalaya (28.2°N, 85.5°E), that eventually drains into the Ganges. The catchment spans an elevation range from 1400 to 7234 m a.s.l. and approximately one quarter of the area is glacierized. Numerous research projects have been conducted in the valley during the last four decades, with a strong focus on the cryospheric components of the catchment water balance. Since 2012 multiple weather stations and discharge stations provide measurements of atmospheric and hydrologic variables. Full weather stations are used to monitor at an hourly resolution all four radiation components (incoming and outgoing shortwave and longwave radiation; SWin/out and LWin/out), air temperature, humidity, wind speed and direction, and precipitation, and cover an elevational range of 3862–5330 m a.s.l. Air temperature and precipitation are monitored along elevation gradients for investigations of the spatial variability of the high mountain meteorology. Dedicated point-scale observations of snow cover, depth and water equivalent as well as ice loss have been carried out over multiple years and complement the observations of the water cycle. All data presented is openly available in a database and will be updated annually.
2 Li, D.; Lu, X.; Walling, D. E.; Zhang, T.; Steiner, J. F.; Wasson, R. J.; Harrison, S.; Nepal, Santosh; Nie, Y.; Immerzeel, W. W.; Shugar, D. H.; Koppes, M.; Lane, S.; Zeng, Z.; Sun, X.; Yegorov, A.; Bolch, T. 2022. High Mountain Asia hydropower systems threatened by climate-driven landscape instability. Nature Geoscience, 15(7):520-530. [doi: https://doi.org/10.1038/s41561-022-00953-y]
Hydropower ; Climate change ; Mountains ; Landscape ; Glaciers ; Snowmelt ; Extreme weather events ; Floods ; Rain ; Sediment load ; Erosion ; Resilience ; Dams ; Reservoirs ; Lakes / Asia / High Mountain Asia / Himalaya
(Location: IWMI HQ Call no: e-copy only Record No: H051234)
(2.58 MB)
Global warming-induced melting and thawing of the cryosphere are severely altering the volume and timing of water supplied from High Mountain Asia, adversely affecting downstream food and energy systems that are relied on by billions of people. The construction of more reservoirs designed to regulate streamflow and produce hydropower is a critical part of strategies for adapting to these changes. However, these projects are vulnerable to a complex set of interacting processes that are destabilizing landscapes throughout the region. Ranging in severity and the pace of change, these processes include glacial retreat and detachments, permafrost thaw and associated landslides, rock–ice avalanches, debris flows and outburst floods from glacial lakes and landslide-dammed lakes. The result is large amounts of sediment being mobilized that can fill up reservoirs, cause dam failure and degrade power turbines. Here we recommend forward-looking design and maintenance measures and sustainable sediment management solutions that can help transition towards climate change-resilient dams and reservoirs in High Mountain Asia, in large part based on improved monitoring and prediction of compound and cascading hazards.
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