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冰川体积估算对水资源以及冰川变化研究具有重要的意义.但是实测的冰川厚度数据十分稀少,限制了冰川体积的估算.2011年5月对念青唐古拉山北坡扎当冰川进行了雷达测厚工作,获取了该冰川的厚度分布状况.基于该冰川的厚度数据,测量点的GPS数据,1970年的地形图和2010年Landsat TM影像,在ArcGIS技术的支持下,采用简单Kriging插值方法对冰川非测厚区域的厚度进行了插值计算,绘制出了冰川厚度等值线图并估算了冰川的冰储量.结果表明:冰川最大厚度出现于海拔约5 748 m靠近主流线的位置,最大冰厚度为108 m,冰川平均厚度为38.1 m,2010年冰川面积为1.73 km2,扎当冰川的冰储量为0.066 km3.将扎当冰川表面DEM与冰川厚度分布图相结合,绘制出了该冰川的冰床地形图.结果显示,在冰川厚度大的区域,冰床地形呈现近V字形分布,这与其相对平缓的冰面地形形成明显对比;同时,在冰表地形较陡区域,冰川厚度不大,冰床地形呈现U形分布.
Glacial volume estimation is of great significance for the study of water resources and glacier change.But the measured glacier thickness data is very scarce, which limits the estimation of the glacier volume.In May 2011, Radar thickness measurement was carried out on the Zhadi glacier on the northern slope of the Nyainqentanglha Mountain And obtained the thickness distribution of the glacier.Based on the glacier’s thickness data, the GPS data of the measuring point, the topographic map of 1970 and the Landsat TM image of 2010, with the help of ArcGIS technology, the simple Kriging interpolation method was used to calculate the glacier The thickness of non-thickness area was interpolated, the contour map of glacier thickness was drawn and the glacier’s ice reserves were estimated.The results showed that the maximum thickness of glacier appeared at an altitude of about 5 748 m near the mainstream line, and the maximum ice thickness The average glacier thickness is 38.1 m, the glacier area is 1.73 km2 in 2010, and the ice reserve in Zhadu Glacier is 0.066 km3. The glacier ice is drawn by combining the DEM on the Zha-Dang glacier with the glacier thickness distribution map Bed topography.The results show that in the area of glacier thickness, the ice sheet topography presents a nearly V-shaped distribution, which is in striking contrast with its relatively flat ice topography. At the same time, Shapes more steep area, the glacier thickness is not large, ice-shaped terrain presents U-shaped distribution.