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冰下地形与冰川体积的估算对冰川水资源研究具有重要意义.以萨吾尔山木斯岛冰川为研究对象,利用Landsat影像数据、探地雷达(ground penetrating radar,简称GPR)冰川厚度数据以及差分GPS数据,分析模拟了萨吾尔山木斯岛冰川横纵剖面的厚度分布特征,采用多种插值方法比较分析,得到木斯岛冰川冰舌区的厚度分布图,初步估算了该冰川的冰储量.结合数字高程模型数据及冰川厚度分布图,绘制了木斯岛冰川冰舌区冰床地形图.研究表明,两个横剖面的冰川槽谷形态存在较大的差异.横剖面B1-B2有典型的“U”型地形发育,冰川厚度可达116.4m;C1-C2横剖面底部地形比较平缓,冰川厚度分布较均匀,平均在70~90m.纵测线A1-A2冰下地形成阶梯状分布,纵剖面冰体平均厚度约为80.89m,最大冰体厚度为122.67m.木斯岛冰川的冰床地形图与该冰川的冰厚度等值线图形成明显对比.在海拔3 240m和3 280m处存在明显的冰斗地形地貌.初步估算木斯岛冰川冰舌区的平均厚度和冰储量分别为60.5m和0.195km~3.与传统计算冰储量的方法相比,利用GPR测量得到的冰川厚度数据来插值计算冰储量的方法,具有更高的准确性.
The ice topography and glacier volume estimation are of great significance to the study of glacier water resources.Based on Landsat image data, glacier thickness data of ground penetrating radar (GPR) and the difference GPS data were used to simulate the thickness distribution of glacial horizontal section of Mussah Island in the Uighur region of Uighur. The thickness distribution of ice tongue region in the Mussah Island Glacier was obtained through comparative analysis by various interpolation methods. The ice storage of the glacier Combining the digital elevation model data and the glacier thickness distribution map, the ice sheet topographic map of the ice tongue zone in the Mussah Island glacier was drawn.The results show that there are big differences in the shape of glacier valley between the two cross sections.B1-B2 The typical “U” type terrain develops with a glacier thickness of 116.4 m. The bottom of the C1-C2 cross-section has a relatively flat topography with a uniform glacier thickness of 70 to 90 m. The average thickness of the ice body in longitudinal section is about 80.89 m and the maximum ice body thickness is 122.67 m. The ice sheet topography of the muslim glacier is in sharp contrast with the ice thickness contour map of the glacier at an altitude of 3 240 m and 3 280m office The obvious ice bucket topography.It is estimated that the average thickness and ice reserves in the ice tongue zone of Musu glacier are 60.5m and 0.195km ~ 3, respectively.Comparing with the traditional methods of calculating ice reserves, the glacier thickness Data to interpolate the method of calculating ice reserves with higher accuracy.