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首页> 外文期刊>Bulletin of Volcanology: Journal of the International Association of Volcanology and Chemistry of the Earth s Interior >Numerical simulations of block-and-ash flows using the Titan2D flow model: examples from the 2006 eruption of Merapi Volcano, Java, Indonesia
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Numerical simulations of block-and-ash flows using the Titan2D flow model: examples from the 2006 eruption of Merapi Volcano, Java, Indonesia

机译：使用Titan2D流动模型进行块状和灰烬流动的数值模拟：印度尼西亚Java，Merapi火山2006年喷发的例子

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摘要

We present Titan2D simulations of two well-characterized block-and-ash flow (BAF) events of the 2006 eruption of Merapi (Java, Indonesia) that affected the Gendol valley on the volcano's southern flank and adjacent, densely populated interfluve (non-valley) areas: (1) a single dome-collapse event to the south that generated one of the smaller, post-June 14 flows and (2) a sustained, multiple dome-collapse event, also directed to the south, that produced the largest flows of the 2006 eruption emplaced in the afternoon of June 14. Using spatially varying bed friction angles, Titan2D is capable of reproducing the paths, velocities, runout distance, areas covered and deposited volumes of these flows over highly complex topography. The model results provide the basis for estimating the areas and levels of hazards associated with BAFs generated during relatively short as well as prolonged dome-collapse periods and guidance during future eruptive crises at Merapi.
机译：我们用Titan2D模拟了2006年默拉皮（印度尼西亚爪哇）喷发的两个特征鲜明的块灰流（BAF）事件，这些事件影响了火山南翼和邻近，人口稠密的河道之间的金多尔谷（非谷地） ）区域：（1）南部发生一次穹顶坍塌事件，产生了较小的6月14日后的水流之一;（2）持续发生的多次穹顶坍塌事件，也指向南部，产生了最大的6月14日下午发生了2006年喷发的水流。利用空间变化的河床摩擦角，Titan2D能够在高度复杂的地形上再现这些流的路径，速度，跳动距离，覆盖面积和沉积量。该模型结果为估算在相对较短和较长的穹顶塌陷期间产生的BAF相关危险的面积和水平提供了基础，并为未来在默拉皮爆发的危机提供了指导。

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