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对冰川进行动力学模拟,对于理解和预测冰川对气候变化的响应具有非常重要的意义.每条冰川主流线上各节点间的面积-高程分布、坡度等是冰川动力学模拟中必需的参数,采用人工方法提取冰川的这些参数需要耗费大量时间和人力.因此,在GIS技术支持下提高获取参数的自动化程度对于获取参数的效率十分重要.以叶尔羌河流域为例,以冰川分布矢量、冰川主流线、流域的数字高程模型为基础,开展了冰川动力学模型参数自动提取流程的试验研究.研究参考了人工提取的流程,先自动提取冰川主流线上各节点处的高程,进而获取主流线上各节点之间的分带面积,最后计算出其他参数,如冰川作用差、长度、坡度等.整个过程基本实现了提取流程的自动化,为流域冰川动力学模拟提供了有效工具.
Dynamic simulation of glaciers is very important for understanding and predicting the response of glaciers to climate change.The area-elevation distribution and slope are the necessary parameters in the glacier dynamics simulation of each glacier, It is very time-consuming and labor-intensive to extract the parameters of glaciers by artificial methods. Therefore, it is very important to improve the automation of obtaining parameters with the support of GIS technology. Taking the Yarkant River Basin as an example, taking the glacier distribution vector, Based on the digital elevation model of the basin, an experimental study on the process of automatic extraction of glacier kinetic model parameters was carried out.Reference was made to the artificial extraction process by first automatically extracting the elevation at each node of the mainstream glacier, Finally, the other parameters are calculated, such as poor glacier function, length, slope, etc. The extraction process is basically automated in the whole process, which provides an effective tool for glacier dynamics simulation in the basin.