[Spectrum measurement and analysis of snow cover/melt in Miyaluo district in northwest of Sichuan province].

Mountainous ice sheet and snow cover play an important role in water balance in many area, and the measurement of it in large area is mainly depending on remote sensing. In order to retrieve the storage volume of snow cover in an area with remote sensing, knowing the spectral feature is prerequisite. In the present paper, the Miyaluo district in northwest of Sichuan province was selected as the study area, twenty four measurement points were laid in study area, and the ASD FieldSpec Pro III was selected as the spectral measurement instrument to collect the reflectance spectra of the snow on 21-22, January 2007. Then, the spectrum feature of the snow in the study area was analyzed. The result indicates that 1026, 1256, 1493 and 1990 nm are the characteristic absorption valleys, the snow reflectance on the surface has some relation with the snow depth, and also the snow reflectance varies with the depth in the study area.