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中文摘要：
积雪含水率是雪层中液态水的含量,也是积雪出流、产流的关键指标,对积雪含水率的研究对春季融雪产流及融雪型洪水有现实意义。借助美国ASD地物光谱仪和Snow Folk积雪特性仪获取原始数据,并利用SPSS19.0和Excel等统计软件对数据进行分析、处理,并利用这些数据进行制图、数据综合,建立雪表层的地物光谱特征预测模型。结果表明：积雪的光谱特征曲线由于在可见光和近红外由于吸收呈现出若干波谷;地物光谱特征与积雪表层含水率存在负相关关系,且随着波长的增加这种负相关关系变化明显,并在可见光和近红外形成三个相关关系的极小值;构建雪层含水率的地物光谱反射率模型,可见光范围内,在350nm时的模型精度较高,能够达到75.9%,预测值和实测值拟合程度高,在近红外波段内,1 204nm建模的模拟精度最高。
英文摘要：
The research on water content of snow has the real meaning of the flow of runoff and flood in Spring.Our team got the original data from ASD and Snow Folk,meanwhile these data were anglicized and handled under the help of SPSS19.0and Excel.The result shows that there are several valleys for the absorbing in visible and near-infrared region in the curve of spectrum characteristics ; the spectrum characteristics and the water content of surface snow are negative correlated,and this kind of relation will change with the increase in wavelength,and there lies three minimum values of correlation in the visible and near infrared region.The prediction model wasconstructed,which lies in the visible light band,the result is positive,the model in the band of 350nm has high-precision,reaching 75.9%,and there is high fitting degree of the predicted and measured values,while in the near infrared,the model constructed in the band of 1 204nm holds the highest accuracy.
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