Changes in Imja Lake and Karda Lake in the Everest Region of Himalaya


The Himalaya is a region sensitive to climate change. Changes in the glacial regime are one indicator of global climate changes. There are several studies focusing on analysis of temporal changes of these glacial lakes in the Himalaya region. However, the researches on addressing these trends in relation with surrounding topographical conditions are quite limited. In this study, we analyzed spatio-temporal changes in Imja Lake, located on the southern slope, and Karda Lake, located on the northern slope of the Mt. Everest region, in 1976, 1992, 2000, and 2008. Moreover, we examined whether the topographic conditions differ between the two slopes. Landsat and ASTER GDEM (advanced space borne thermal emission and reflection radiometer, global digital elevation model) data were used to identify boundaries of target glacial lakes and to calculate three indices of growth rate compared to year of 1976 (%, GRa), growth rate compared to preceding year (%, GRb), and growth speed (m2/year, GS) of the two lakes. The topographic conditions in circular buffer zones from the centroid of the two lakes were analyzed. Although the area of two lakes demonstrated linear increase from 1976 to 2008, growth rate compared to year of 1976 (GRa) differed significantly (Kruskal-Wallis test, p < 0.05). The area of Imja Lake enlarged significantly faster than the one of Karda Lake (Kruskal-Wallis test and Chisquared test for independence on m × n contingency table between 1976, 1992, 2000, and 2008 on growth speed (GS)). The two slopes differed in terms of three topographical variables: altitude, aspect, and angle of inclination (Kruskal-Wallis test, p < 0.05). The differences between the growth trends of the two lakes can be explained by differences in the topographic conditions on their respective slopes. However, differences in temporal changes should be explained by other temporal factors, e.g. climatic variables.

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W. Chen, T. Doko, H. Fukui and W. Yan, "Changes in Imja Lake and Karda Lake in the Everest Region of Himalaya," Natural Resources, Vol. 4 No. 7, 2013, pp. 449-455. doi: 10.4236/nr.2013.47055.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] S. S. Negi, “Discovering the Himalaya,” Indus Publishing Co., New Delhi, 1998.
[2] S. R. Bajracharya, P. K. Mool and B. R. Shrestha, “Impact of Climate Change on Himalayan Glaciers and Glacial Lakes: Case Studies on Glof and Associated Hazards in Nepal and Bhutan,” International Centre for Integrated Mountain Development (ICIMOD), Kathmandu, 2007.
[3] D. A. Cenderelli and E. E. Wohl, “Peak Discharge Estimates of Glacial-Lake Outburst Floods and ‘Normal’ Climatic Floods in the Mount Everest Region, Nepal,” Geomorphology, Vol. 40, No. 1-2, 2001, pp. 57-90.
[4] X. Chen, P. Cui, Z. Yang and Y. Qi, “Risk Assessment of Glacial Lake Outburst in the Poiqu River Basin of Tibet Autonomous Region,” Journal of Glaciology and Geocryology, Vol. 29, No. 4, 2007, pp. 509-516.
[5] M. Ghimire, “Review of Studies on Glacier Lake Outburst Floods and Associated Vulnerability in the Himalayas,” The Himalayan Review, Vol. 35/36, No. 2004/2005, 2009, pp. 49-64.
[6] R. Kattelmann, “Glacial Lake Outburst Floods in the Nepal Himalaya: A Manageable Hazard?” Natural Hazards, Vol. 28, No. 1, 2003, pp. 145-154.
[7] D. Xu, “Characteristics of Debris Flow Caused by Outburst of Glacial Lake in Boqu River, Xizang, China, 1981,” Glaciology Journal, Vol. 17, No. 4, 1988, pp. 569-580.
[8] T. Yamada and C. K. Sharma, “Glacier Lakes and Outburst Floods in the Nepal Himalaya,” In: G. J. Young, Ed., Snow and Glacier Hydrology, IAHS Publication, Kathmandu, 1993, pp. 319-330.
[9] J. Hemmleb, L. A. Johnson and E. R. Simonson, “Ghosts of Everest: The Authorised Story of the Search for Mallory & Irvine,” Pan, London, 1999.
[10] P. K. Mool, S. R. Bajracharya and S. P. Joshi, “Inventory of Glaciers, Glacial Lakes and Glacial Lake Outburst Floods—Monitoring and Early Warning Systems in the Hindu Kush-Himalayan Region, Nepal,” International Centre for Integrated Mountain Development (ICIMOD), Kathmandu, 2001.
[11] S. K. McFeeters, “The Use of the Normalized Difference Water Index (Ndwi) in the Delineation of Open Water Features,” International Journal of Remote Sensing, Vol. 17, No. 7, 1996, pp. 1425-1432.
[12] J. M. Reynolds, “On the Formation of Supraglacial Lakes on Debris-Covered Glaciers,” Proceedings of International Association of Hydrological Sciences (IAHS), Seattle, Washington, 2000, pp. 153-161.
[13] D. J. Quincey, et al., “Early Recognition of Glacial Lake Hazards in the Himalaya Using Remote Sensing Datasets,” Global and Planetary Change, Vol. 56, No. 1/2, 2007, pp. 137-152.
[14] B. McCune and D. Keon, “Equations for Potential Annual Direct Incident Radiation and Heat Load,” Journal of Vegetation Science, Vol. 13, No. 4, 2002, pp. 603-606.
[15] R. G. Barry, “Mountain Weather and Climate,” 3rd Edition, Cambridge University Press, Cambridge, 2008.
[16] M. P. Bishop and J. F. Shroder, “Geographic Information Science and Mountain Geomorphology,” Springer & Praxis Publishing, Chichester, 2004.

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