COMCOT数值模式的介绍和应用
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摘要
介绍了一个成熟的海啸数值模式—COMCOT模式。COMCOT模式是一个能够模拟海啸产生、传播和增水全过程的基于浅水波方程的有限差分模型。模型采用多层网格嵌套,根据海啸在不同区域的传播特点和要求,分别选用不同的分辨率和计算设置,从而兼顾了模式的精度和计算效率。利用此模式模拟了2006年12月26日台湾南部7.2级地震产生海啸波的传播情况,结果与两个潮位站的海啸波监测数据相吻合。
In this paper, a mature numerical model for tsunami simulation is presented. COMCOT (Cornell Multi-grid Coupled Tsunami Model) is a tsunami modeling package, capable of simulating the entire lifespan of a tsunami, from its generation, propagation and runup/rundown in coastal regions. COMCOT was developed based on Shallow Water Equations (SWE) in Spherical Coordinates and Cartesian Coordinates using an explicit Leap-frog Finite Differencing Method. As a nested multi-grid model, it is feasible to adopt different configurations for each grid domain in terms of the characteristics in different stages of the tsunami propagation which allows for the balance between computational accuracy and efficiency. The "tsunami" induced by an earthquake happened in south sea area of Taiwan on 2006/12/26 is simulated using this model. The simulation results agree well with the observed data at two tidal stations.
In this paper, a mature numerical model for tsunami simulation is presented. COMCOT (Cornell Multi-grid Coupled Tsunami Model) is a tsunami modeling package, capable of simulating the entire lifespan of a tsunami, from its generation, propagation and runup/rundown in coastal regions. COMCOT was developed based on Shallow Water Equations (SWE) in Spherical Coordinates and Cartesian Coordinates using an explicit Leap-frog Finite Differencing Method. As a nested multi-grid model, it is feasible to adopt different configurations for each grid domain in terms of the characteristics in different stages of the tsunami propagation which allows for the balance between computational accuracy and efficiency. The "tsunami" induced by an earthquake happened in south sea area of Taiwan on 2006/12/26 is simulated using this model. The simulation results agree well with the observed data at two tidal stations.
引文
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[5]Liu P L-F,S-B Woo,Y-S Cho.Computer programs for tsunami propagation and inundation:Cornell University.1998.
[6]于福江,叶琳,王喜年.1994年发生在台湾海峡的一次地震海啸的数值模拟[J].海洋学报,2001,23(6):32-39.
[7]Lynett P,P L-F Liu.A numerical study of submarine landslide generated waves and runups[J].Proceedings of Royal Society of London,2002:2885-2910.
[8]陈韵如.2006年屏东外海地震引发海啸的数值模拟探讨[R].In水文科学研究所,台湾中央大学.2008.
[9]Liu P L-F,X M Wang,A J Salisbury.Tsunami hazard and early warning system in South China Sea[J].Journal ofAsian Earth Sciences,2009,36(1):2-12.
[10]Geller Robert J.Scaling relations for earthquake source parameters and magnitudes[J].Bulletin of the Seismological Society of America,1976,66(5):1501-1523.
[11]台湾南部近海7.2级地震海啸第四号情况通报.
[12]姚远,蔡树群,王盛安.海啸波数值模拟的研究现状[J].海洋科学进展,2007,25(4):487-494.
[2]温瑞智,任叶飞.我国地震海啸危险性分析方法研究[J].世界地震工程,2007,23(1):6-11.
[3]Liu P L-F,Y-S Cho,S B Yoon,et al.Numerical simulation of the1960Chilean tsunami propagation and inundation at Hilo,Hawaii.In Tsunami Progress in Prediction,disaster prevention and warning,(ed.Y.T.a.N.Shuto.),pp.99-115.Amsterdam:Kluwer Academic Publisher.1995.
[4]Wang X M,P L-F Liu.An analysis of2004Sumatra earthquake fault plane mechanisms and Indian Ocean tsunami[J].Journal of Hydraulic Research,2006,44(2):147-154.
[5]Liu P L-F,S-B Woo,Y-S Cho.Computer programs for tsunami propagation and inundation:Cornell University.1998.
[6]于福江,叶琳,王喜年.1994年发生在台湾海峡的一次地震海啸的数值模拟[J].海洋学报,2001,23(6):32-39.
[7]Lynett P,P L-F Liu.A numerical study of submarine landslide generated waves and runups[J].Proceedings of Royal Society of London,2002:2885-2910.
[8]陈韵如.2006年屏东外海地震引发海啸的数值模拟探讨[R].In水文科学研究所,台湾中央大学.2008.
[9]Liu P L-F,X M Wang,A J Salisbury.Tsunami hazard and early warning system in South China Sea[J].Journal ofAsian Earth Sciences,2009,36(1):2-12.
[10]Geller Robert J.Scaling relations for earthquake source parameters and magnitudes[J].Bulletin of the Seismological Society of America,1976,66(5):1501-1523.
[11]台湾南部近海7.2级地震海啸第四号情况通报.
[12]姚远,蔡树群,王盛安.海啸波数值模拟的研究现状[J].海洋科学进展,2007,25(4):487-494.
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