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Estimating total snow volume in a small alpine watershed using remotely sensed data and ground-based surveys
Submitted by Armida on Mon, 02/11/2013 - 13:07
|Estimating total snow volume in a small alpine watershed using remotely sensed data and ground-based surveys
|Year of Conference
|Davis, R. E., Elder K., Rosenthal W., Melack J., and Sickman J.
|61st Annual Western Snow Conference
|Proceedings of the 61st Annual Western Snow Conference
|Western Snow Conference
|Quebec City, Quebec
|Remote sensing, Snow cover
Ground surveys of snow water equivalence and snow cover maps derived from Landsat TM imagery provided the basis for investigating different methods to estimate total snow volume in a small watershed of the eastern Sierra Nevada of California. Snow density profiles and Federal Snow Sampler observations along ground transects made up the measurements used to estimate the snow water equivalence at several points. The area of snow cover was estimated with two techniques, a supervised classification and a method based on spectral mixture modeling. Total snow volume was obtained by distributing snow water equivalence over the snow-covered area with the help of a digital elevation model. Snow volume estimates, in terms of their water equivalence, were compared with the estimated total snowmelt runoff. Total snowmelt runoff was estimated by subtracting baseflow determined with a graphical technique. The comparisons were evaluated in the context of potentially combining remote sensing data with traditional snow course measurements to determine total snow cover volume.