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首页> 外文期刊>Universal Journal of Geoscience >GIS Based Tsunami Risk Assessment in Weligma, Sri Lanka
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GIS Based Tsunami Risk Assessment in Weligma, Sri Lanka

机译：基于GIS的斯里兰卡Weligma海啸风险评估

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A tsunami is a natural coastal hazard generated in the deep ocean as a result of an earthquake, volcanic activity, submarine landslide or meteoritic impact. The 26th Dec. 2004 earthquake off the west coast of Sumatra, Indonesia generated one of the deadliest tsunami in history. It demolished the coastal areas of Indonesia, Sri Lanka, India, and Thailand, as these countries located shadow zone of this tectonic belt. Over thirty thousand loss their lives and also millions of worth extensive property damaged. As Sri Lanka situated in a shadow zone of the earthquake generated belt preparedness is very important factor. The study focused towards creation of a Tsunami risk map for Weligama area. The numerical simulation of tsunami inundation was carried out using ComMIT model with the major input parameters of earthquake source parameters, topography and bathymetry data. The December 2004 Sumatra Earthquake source parameters were used for generation, propagation, and coastal amplification of the tsunami waves and finally the inundation extent and water level was obtained to prepare large scale action maps on tsunami inundation to protect the coastal communities. The GIS tool has been used to incorporate the tsunami inundation depth to prepare the final tsunami risk map. Reliability of model results was compared with the field data and a high resolution QuickBird images with pre and post tsunami. The results from this study will be useful for long – term planning in vulnerable coastal communities and providing early warnings to take precautions to reduce impacts of tsunami in future.
机译：海啸是由于地震，火山活动，海底滑坡或陨石影响而在深海产生的自然沿海灾害。 2004年12月26日，印度尼西亚苏门答腊岛西海岸发生的地震引发了历史上最致命的海啸之一。它摧毁了印度尼西亚，斯里兰卡，印度和泰国的沿海地区，因为这些国家位于该构造带的阴影区。三万多人丧生，数百万身价巨大的财产遭到破坏。由于斯里兰卡地处地震的阴影带，因此防备带是非常重要的因素。该研究的重点是为Weligama地区创建海啸风险图。使用ComMIT模型，以地震震源参数，地形和测深数据为主要输入参数，对海啸淹没进行了数值模拟。 2004年12月的苏门答腊地震震源参数用于海啸波的产生，传播和沿岸放大，最后获得了淹没程度和水位，以编制有关海啸淹没的大规模行动图，以保护沿海社区。 GIS工具已用于整合海啸淹没深度，以准备最终的海啸风险图。将模型结果的可靠性与现场数据和海啸发生前后的高分辨率QuickBird图像进行了比较。这项研究的结果对于脆弱的沿海社区的长期规划以及提供预警以采取预防措施以减少未来海啸的影响将是有用的。

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