Development of a GIS-based Open Source Simulation Tool for Modelling General Avalanche and Debris Flows over Natural Topography

开发基于 GIS 的开源模拟工具，用于模拟自然地形上的一般雪崩和泥石流

• 批准号: 250431212
• 负责人: Professor Dr.-Ing. Andreas Malcherek, since 1/2016
• 金额: --
• 依托单位: Institut für Mathematik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/250431212?language=en
• 关键词: Development; GIS; based; Open; Source

Catastrophic granular and debris flows occur in many mountain areas all over the world. Snow avalanches, rock or rock-ice avalanches, debris flows, lahars and pyroclastic flows are only some examples. An adequate management of the risk related to these phenomena requires a detailed and reliable analysis of the mechanisms involved in such processes. Even though much work has been done on this subject, and a number of physically-based models with a varying degree of complexity do exist, some problems still remain unsolved: (1) Flow over arbitrary topography, the role of viscous pore fluid or two-phase nature of flow, and particle and/or fluid entrainment have not yet been accounted for in an appropriate way. (2) Until now, no successful attempts have been made to build easy-to-handle Open Source applications of these complex models, which would be essential to make them available to a broader group of users in universities and public services.This proposal offers an effective, innovative and unified solution to these two problems. It is therefore concerned with rapid geophysical mass flows, including avalanches and real two-phase debris flows, from a known initiation zone through the flow path along natural mountain topography into the deposition zone. For a given amount of mass and its distribution in the initiation zone, we are interested in the motion and geometric deformation along the track down the arbitrary topography, including the processes of erosion and deposition of mass along the track and the ultimate distribution of the deposited mass. This will also include the effect of dynamically evolving pore fluid pressure and/or evolution of the solid and the fluid components. An equally important focus shall be put onto the development of a user-friendly and freely accessible application of the developed model. This application will build upon the GIS software GRASS, which is available as an Open Source product under the GNU General Public License. The new software will be evaluated using physical model tests and well-documented mass flow events. These tests will cover a broad range of processes and process chains including debris flows, debris avalanches and avalanches of snow or rocks.

灾难性的颗粒流和泥石流发生在世界各地的许多山区。雪崩、岩石或岩冰雪崩、泥石流、熔岩和火山碎屑流只是其中的一些例子。要充分管理与这些现象有关的风险，就需要对这些过程中涉及的机制进行详细和可靠的分析。尽管在这个问题上已经做了大量的工作，并且确实存在一些复杂程度不同的基于物理的模型，但仍然有一些问题没有得到解决：(1)任意地形上的流动，粘性孔隙流体的作用或两相流动的性质，以及颗粒和/或流体的夹带还没有以适当的方式考虑。(2)到目前为止，还没有成功的尝试来建立这些复杂模型的易于操作的开放源码应用程序，这对于在大学和公共服务中向更广泛的用户群体提供这些应用程序是必不可少的。因此，它所关注的是快速的地球物理物质流，包括雪崩和真正的两相泥石流，从已知的起始区通过沿天然山区地形的流动路径进入沉积区。对于给定的质量及其在起爆区的分布，我们感兴趣的是沿轨道沿任意地形的运动和几何变形，包括质量沿轨道的侵蚀和沉积过程以及沉积质量的最终分布。这还将包括动态变化的孔隙流体压力和/或固体和流体组分的演化的影响。应将同样重要的重点放在开发所开发模式的方便用户和可自由使用的应用程序上。这个应用程序将构建在地理信息系统软件GRASS的基础上，GRASS是GNU通用公共许可证下的开放源码产品。新软件将使用物理模型测试和记录良好的质量流事件进行评估。这些测试将涵盖广泛的过程和过程链，包括泥石流、泥石流和雪崩或岩石。

项目成果

Optimal systems of Lie subalgebras for a two-phase mass flow

两相质量流的李子代数最优系统

• DOI: 10.1016/j.ijnonlinmec.2016.10.005
• 发表时间: 2017
• 期刊: International Journal of Non-linear Mechanics
• 影响因子: 3.2
• 作者: Ghosh Hajra;Kandel;Pudasaini
• 通讯作者: Pudasaini

On analytical solutions of a two-phase mass flow model

两相质量流模型的解析解

• DOI: 10.1016/j.nonrwa.2017.09.009
• 发表时间: 2017
• 期刊: Nonlinear Analysis: Real World Applications
• 作者: Ghosh Hajra;Kandel;Pudasaini
• 通讯作者: Pudasaini

Landslide-generated tsunami and particle transport in mountain lakes and reservoirs

• DOI: 10.3189/2016aog71a034
• 发表时间: 2016-03
• 期刊: Annals of Glaciology
• 影响因子: 2.9
• 作者: J. Kafle;Puskar R. Pokhrel;Khim B. Khattri;Parameshwari Kattel;B. M. Tuladhar;S. Pudasaini

A generalized quasi two-phase bulk mixture model for mass flow

• DOI: 10.1016/j.ijnonlinmec.2017.12.003
• 发表时间: 2017-12
• 期刊: International Journal of Non-linear Mechanics
• 影响因子: 3.2
• 作者: Puskar R. Pokhrel;Khim B. Khattri;B. M. Tuladhar;S. Pudasaini

A novel description of fluid flow in porous and debris materials

• DOI: 10.1016/j.enggeo.2015.12.023
• 发表时间: 2016-03
• 期刊: Engineering Geology
• 影响因子: 7.4
• 作者: S. Pudasaini