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利用积雪对土壤伽马射线的衰减作用,可较为精确地测量较大范围内的地表雪水当量,并且具有不破坏地表特征的优点.然而,测量地域的土壤下垫面特征对该方法的精度影响较大.为了提高伽马射线(Gamma)反演雪水当量的精度,以阿勒泰积雪区为研究区,考虑土壤水分对测量结果的扰动以及参数的地域特征,对反演算法进行了改进.该方法在参数率定期对雪水当量反演的纳什系数为0.97,验证期的纳什系数为0.99.结果说明:经过标定的伽马射线测量方法,具有媲美人工测量的精度,且具有自动连续观测的优点.同时,在使用伽马射线测量雪水当量时,考虑土壤水分变化的影响可更准确地反演地表雪水当量.“,”Gamma-ray from soil after the attenuation of snow,can accurately measure the surface snow water equivalent of a wide range,and this method has the advantage of without destroying the surface features.However,the changes in measuring geographical bring a great influence in accuracy of it.In order to improve the precision of snow water equivalent measured by gamma (Gamma),in this paper,considering the disturbance of soil moisture to the measurements and the geographical parameters of features.After the calibration of parameters ,the inversion algorithm has been improved.The result shows that,after calibration of gamma-ray measurement is comparable to manual measurement accuracy.When using gamma ray to measure snow water equivalent,taking into account the effect of soil moisture changes can more accurately retrieving the snow water equivalent of surface.It can be concluded that improved inversion inversion of good snow water equivalent,higher accuracy.Thus,Gamma-ray detection technology in snow area has a good prospect of water resources research.