Study of the Relationship between Snow Cover Fraction and Snow Water Equivalent in Binggou Watershed
The relationship between snow cover fraction and snow water equivalent at pixel scale is an effective approach of applying high resolution optical remote sensing data in hydrological models.Binggou watershed was selected as the study area in this paper this paper.Retrieved snow cover fraction (SCF) and snow water equivalent (SWE) information through the ENVISAT-ASAR data,thus resamples the SCF and SWE data in 500m resolution and analyzes the relation between SCF and SWE.The results show that:① Without the concern of topographic factors,snow cover fraction and snow water equivalent is a discrete distribution,however,snow cover fraction determines the maximum value of snow water equivalent,and the average snow water equivalent improves with the increased snow cover fraction;②When considering topographic factors,the multifactor regression analysis of snow water equivalent and snow cover fraction,slope,aspect,altitude show that the regression coefficient significance level is less than 0.05,and the correlation coefficient reaches at 0.841.Therefore,snow cover fraction can be converted into snow water equivalent according to the analysis of specific snow depletion curve,thich provides a solution to fuse the remote sensing data into cold region hydrological model.
Remote sensingSnow depletion curveSnow Cover Fraction(SCF)Snow Water Equivalent (SWE)SAR
NETL
NSTL
万方数据
维普
