一种测量积雪粒径的新方法

A New Method to Measure the Snow Grain Size: A Case of Juntanghu Watershed

将积雪粒径的图像与ARCGIS软件相结合,发展了一种获取积雪粒径数据的新方法,在天山北坡军塘湖流域采集了积雪粒径样本,计算出军塘湖流域积雪等效粒径,并与传统方法进行对比。结果表明,用图像采集与ARCGIS软件相结合的方法是可行的,不仅增加了积雪粒径样本的采集量,且提高了粒径数据的精度;数据表明,军塘湖流域融雪期积雪粒径在垂直方向上从表层至底层逐渐增大,水平方向上,随着融雪过程的进行,积雪粒径逐渐增大;同时,同一层面上的积雪粒径之间的差异也越来越大。

Combined the image of the snow grain size with the ArcGIS software,a new method to obtain snow grain size data was developed.Snow grain size of samples were collected in the northern slope of Tianshan Juntanghu basin,the snow equivalent grain size of Juntanghu basin was calculated,and compared with the data obtained in traditional method.The study showed that combination of image acquisition and ArcGIS software is feasible,not only increased the amount of snow grain size sample collection,but also improved the accuracy of the grain size data.The results also indicated that in Juntanghu basin,snow grain size increases gradually from the surface to the bottom in the vertical direction.The horizontal direction,with the snowmelt process proceeds,the snow grain size increases.At the same time,the difference between the snow grain sizes on the same level is also growing.