Effect of contamination and mixed objects on snow reflectance using spectroradiometer in Beas Basin, India

H. S. Negi; A. V. Kulkarni; S. K. Singh

doi:10.1117/12.693879

12 December 2006 Effect of contamination and mixed objects on snow reflectance using spectroradiometer in Beas Basin, India

H. S. Negi, A. V. Kulkarni, S. K. Singh

Author Affiliations +

Proceedings Volume 6411, Agriculture and Hydrology Applications of Remote Sensing; 641115 (2006) https://doi.org/10.1117/12.693879
Event: SPIE Asia-Pacific Remote Sensing, 2006, Goa, India

Abstract

Field observations were carried out using Spectroradiometer (350-2500nm) to understand effect of contamination on the snow reflectance and mix of snow, vegetation and soil by different proportions on its reflectance. The experiments were carried out in Beas Basin, India during the winter 2004-05 and 2005-06. The investigation has shown that as contamination increases, snow reflectance decreases in all wavelengths, however highest decrease was observed in visible region. In addition, peak of reflectance shifted to high wavelengths, as amount contamination increases. For snow cover and soil cover mix, as proportion of soil cover increases reflectance increases in SWIR region and decreases in visible region. In snow and vegetation mix, as proportion of vegetation increases, curve pattern of vegetation was observed. This means reflectance and absorption due to vegetation presence in visible and NIR region can be observed. If proportion of vegetation area is equal to snow, then reflectance pattern is similar to vegetation. However, if vegetation proportion is lower, then reflectance curve moves to higher reflectance range in visible and NIR region and beyond that reflectance slightly reduces. This study suggests, if hyperspectral data is available then proportion of snow in mixed pixel can be estimated. This study will help in improving existing Normalized Difference Snow Index based algorithms for snow cover monitoring and developing new algorithm, if hyperspectral data is available.

Citation Download Citation

H. S. Negi, A. V. Kulkarni, and S. K. Singh "Effect of contamination and mixed objects on snow reflectance using spectroradiometer in Beas Basin, India", Proc. SPIE 6411, Agriculture and Hydrology Applications of Remote Sensing, 641115 (12 December 2006); https://doi.org/10.1117/12.693879

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