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Computational corroboration of the flow of rock glaciers against borehole measurements
International Journal of Non-Linear Mechanics ( IF 3.2 ) Pub Date : 2021-03-10 , DOI: 10.1016/j.ijnonlinmec.2021.103710
Krishna Kannan , Daniela Mansutti , Kumbakonam R. Rajagopal

In this study, we computationally corroborate the flow of rock glaciers against borehole measurements, within the context of a model previously developed (2020). The model is, here, tested against the simulation of the sliding motion of the Murtel-Corvatsch alpine glacier, which is characterized in detail in the literature with internal structure description and borehole deformations measurement.

The capability of the model to take into account the composition of the rock glacier, as a mixture of ice and rock and sand grains with the local impact of pressure and heat transfer, results in the accurate detection of the internal sliding.

With careful calibration of the model parameters, the computed numerical solution of the model reports a relative error of 1.8% and of 0.3% in the reproduction of the measured shear zone velocity and of the ratio of measured shear zone deformation over top surface deformation, respectively.

Furthermore a deeper understanding of the role of the model parameters involved in the simulation of such a process is also gained and we discuss the same in detail.



中文翻译:

针对钻孔测量的岩石冰川流动的计算证实

在这项研究中,我们在先前开发的模型(2020年)的背景下,根据钻孔测量结果在计算上证实了冰川的流动。在此,对模型进行了模拟,以模拟Murtel-Corvatsch高山冰川的滑动运动,该文献在文献中通过内部结构描述和井眼变形测量对其进行了详细描述。

该模型将冰冰川,岩石和沙粒的混合物以及压力和热传递的局部影响考虑在内的能力能够对内部滑动进行精确检测。

通过仔细校准模型参数,模型的计算出的数值解决方案在测量的剪切区速度和测量的剪切区变形与顶面变形之比的再现中分别报告了1.8%和0.3%的相对误差。 。

此外,还获得了对模型参数在此类过程的仿真中所起作用的更深入的了解,我们将对其进行详细讨论。

更新日期:2021-03-21
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