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首页> 外文期刊>International Journal of Erosion Control Engineering >Analysis for a Landslide Dam Outburst Flood in Ambon Island, Indonesia
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Analysis for a Landslide Dam Outburst Flood in Ambon Island, Indonesia

机译：印度尼西亚安汶岛的一次滑坡大坝突水洪水分析

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In July 2012, a landslide dam subsequent to the large-scale collapse of a mountain edifice occurred on Ambon Island in the eastern part of Indonesia. A height of the dam was approximately 140 m and a volume of dammed water was approximately 250 million m~(3). The dam failed about a year after its formation in July 2013, and a large-scale flood wreaked havoc on the downstream area. In this disaster, the information on the topographic changes before and after the dam failure was obtained from digital maps (DEM) based on satellite images and field measurement. Furthermore, field surveys examined the various conditions of the sites around the landslide dam and a process of the outburst flood was recorded on video. Simulation of a landslide dam outburst flood was conducted using LADOF model that reproduces the process of overflow and erosion of a landslide dam outbreak and the calculation result was verified by field measurement data. The results are as follows. (1)The peak flow rate of the landslide dam outburst flood determined by simulation was approximately 17,000 m~(3)/s. (2)The occurrence and duration of the flood, longitudinal profile of the dam, inundated area and flow depth obtained from the simulation almost agree with the actual results obtained from field measurement. (3)The phenomena whereby the progress of longitudinal erosion caused the collapse of the stream bank and rapidly expanded the river channel width could be confirmed by analysis of the video images.
机译：2012年7月，印度尼西亚东部安汶岛上的一座山建筑物大规模倒塌后，发生了滑坡水坝。大坝的高度约为140 m，大坝的水量约为2.5亿立方米（3）。该大坝于2013年7月形成大约一年后就倒塌了，下游发生了大规模洪灾。在这场灾难中，大坝倒塌前后的地形变化信息是从基于卫星图像和现场测量的数字地图（DEM）中获得的。此外，现场调查检查了滑坡坝周围场地的各种状况，并在录像中记录了爆发洪水的过程。利用LADOF模型进行了滑坡坝突水洪水的模拟，该模型再现了滑坡坝突水的溢出和侵蚀过程，并通过现场测量数据验证了计算结果。结果如下。 （1）模拟确定的滑坡坝突出洪水的峰值流速约为17,000 m〜（3）/ s。 （2）通过模拟获得的洪水的发生和持续时间，大坝的纵剖面，淹没区域和水深与实地测量的实际结果几乎一致。 （3）通过视频图像分析可以证实纵向侵蚀的进展导致河岸塌陷并迅速扩大河道宽度的现象。

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