The evolution of the Tsho Rolpa Glacial Lake and its size can be known from the published journals and earlier field surveys which are the secondary data. The increment in the size of the lake indicates the retreat of the Trakarding Glacier and the data of four different years will be analyzed via satellite images. The changes that have been observed in the lake size in 1990, 2000, 2009 and 2012 will be the main part of a concern in this research. The data of 2012 will be the primary data that is to be collected via LANDSAT MSS and will be compared with the earlier field surveys and published journals. The comparison will thus give the present size of the lake as well as the rate of retreat of Trakarding Glacier. The retreat rate of the glacier is known by the decreasing length of Trakarding Glacier.
The expected output of this study is a research document that links the data of Tsho Rolpa Glacial Lake size since 1990 with the Tsho Rolpa Lake size of 2012. The study aims on finding out the spatial and temporal variation of retreat rate, albedo change and thermal regime change within the glacier and its periphery.Thus, the paper will contribute on the following major research outputs:
- Expansion of Tsho Rolpa Glacial Lake and retreat of Trakarding Glacier since 1990-2012
- Estimation of spatial and temporal thermal regime of Tsho Rolpa and Trakarding Glacier and its changes in 1990s and 2012
- Variation of climate of Rolwaling Valley
- Present size of Tsho Rolpa Glacial Lake
The clarification of the glacial lake expansion process is possible from the analysis of the relation between the glacial lake expansion and the change in thermal regime of the lake.By knowing the expansion of Tsho Rolpa Glacial Lake and the retreat rate of Trakarding glacier, will help other researchers also to further work on the hazard assessment of GLOF in the Rolwaling Valley.Besides that, fulfilling all the main objectives, research shows whether the retreat of Trakarding Glacier is the result of climate change or not.
Chitika, K; Yamada, T; Sakai, A; Ghimire, RP (1997) ‘Hydrodynamic effects on the basin expansion of Tsho Rolpa Glacier Lake in the Nepal Himalaya.’ Bulletin of Glacier Research 15: 59-69
Hall, D.K., Box, J.E., Casey, K.A., Hook, S.A., Shuman, C.A. and Steffen, K.(2008): Comparison of satellite-derived and in-situ observations of ice and snow surface temperatures over Greenland. Remote Sensing Environment 112, 3739-3749
ICIMOD (2011). Glacial lakes and glacial lake outburst floods in Nepal, Kathmandu: ICIMOD
Knap, W.H., Brock, B.W., Oerlemans, J. and Willis, I.C. (1999): Comparison of Landsat TM-derived and ground-based albedos of Haut Glacier d’Arolla, Switzerland, International Journal of Remote Sensing, 20:17, 3293-3310
Oerlemans, J., 1993, A model for the surface balance of ice masses: part I. Alpine glaciers. Zeitschrift fÜ r Gletscherkunde und Glazialgeologie, 27/ 28, 63- 83.