Change Monitoring of Snow-coverage Based on ALOS-PRISM Stereo Images

doi:10.13474/j.cnki.11-2246.2017.0341

Abstract

Abstract: For the problem of snow cover land surface change monitoring, a new method was introduced taking Geladandong for instance. Using this method, the extraction of glacier DEM with ALOS-PRISM stereo-pair images was carried out, and snow-covered land surface change as well as volume change monitoring was applied with multi-temporal homology DEM images. Area variation of snow-covered land surface was obtained using ISODATA classing method based on rectified images by DEM images.Volume variation of glacier was obtained by area difference value and elevation difference value, which was derived from elevation-noted points in multi-temporal DEM images. Therefore, estimation of snow volume from 2009 to 2010 was implemented.Results showed that reduced snow volume was 19.728 3 km³ and area of snow cover was 349.691 km² from December 2009 to December 2010.A method for extracting glacier DEM was put forward with stereo-pair images, and as well as for calculating volume variation of glacier with multi-temporal homology DEM images.

Key words: change of snow cover, stereo images, DEM, information of snow cover volume, ALOS-PRISM

CLC Number:

P237

WANG Conghua, LIU Wei, DU Hejuan, LIN Zongjian. Change Monitoring of Snow-coverage Based on ALOS-PRISM Stereo Images[J]. 测绘通报, 2017, 0(11): 22-26.

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