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2004•Journal of Lanzhou UniversityRequires access

Study on changes of glaciers and glacial lakes in the Pumqu Basin based on RS and GIS

Wei Hong

Open publisher page 3 citations

Abstract

The glaciers are retreating year after year because of the global warming. As a result, the glacial lake outburst floods (GLOF) become frequent. So that more attention should be paid on them. But the study of glacial lakes with static and isolated means has not satisfied the need to monitor the glacial lake change. The basic data in this paper includes relief maps in 1970s and aster images in 2001 and 2002. The GIS tools are used to digitizing the spatial distribution of the glaciers and glacial lakes during these two periods. Then these spatial data are analyzed. The results show that the glacier area decreases 9% and the glacial lake area increase 13%. Then 24 potential risk lakes are identified in Pumqu Basin. The results are very important to monitore the GLOF and constructing an effective pre-alarm system of the GLOF hazards.

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What this paper is about

The glaciers are retreating year after year because of the global warming. As a result, the glacial lake outburst floods (GLOF) become frequent. So that more attention should be paid on them. But the study of glacial lakes with static and isolated means has not satisfied the need to monitor the glacial lake change. The basic data in this paper includes relief maps in 1970s and aster images in 2001 and 2002. The GIS tools are used to digitizing the spatial distribution of the glaciers and glacial lakes during these two periods. Then these spatial data are analyzed. The results show that the glacier area decreases 9% and the glacial lake area increase 13%. Then 24 potential risk lakes are identified in Pumqu Basin. The results are very important to monitore the GLOF and constructing an effective pre-alarm system of the GLOF hazards.

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Available abstract

The glaciers are retreating year after year because of the global warming. As a result, the glacial lake outburst floods (GLOF) become frequent. So that more attention should be paid on them. But the study of glacial lakes with static and isolated means has not satisfied the need to monitor the glacial lake change. The basic data in this paper includes relief maps in 1970s and aster images in 2001 and 2002. The GIS tools are used to digitizing the spatial distribution of the glaciers and glacial lakes during these two periods. Then these spatial data are analyzed. The results show that the glacier area decreases 9% and the glacial lake area increase 13%. Then 24 potential risk lakes are identified in Pumqu Basin. The results are very important to monitore the GLOF and constructing an effective pre-alarm system of the GLOF hazards.

Key concepts: Glacial period, Glacier, Glacial lake, Physical geography, Advanced Spaceborne Thermal Emission and Reflection Radiometer, Climate change, Glacial landform, Structural basin

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