不同经验公式对海啸数值模拟的影响

Influence of different empirical formulas on numerical simulation of tsunami

针对不同经验公式的断层参数对海啸数值模拟影响的问题,该文选择两种断层参数的经验公式,海啸初始阶段采用Okada模型,该模型将海底地形变化直接作为水面变化进行处理,利用COMCOT海啸传播模型分别对2013年2月6日发生在所罗门群岛海域的地震海啸进行数值模拟。将数值模拟结果与DART观测站的实际观测数据进行比较。结果表明,JMA经验公式计算的断层长度、宽度和滑动量的海啸数值模拟结果更符合此次海啸的实际观测数据。研究结论对所罗门群岛及周边海域地震海啸数值模拟中断层参数的确定具有实际参考意义。

In order to study the influence of fault parameters of different empirical formulas on the numerical simulation of tsunami,this paper selected the empirical formulas of two kinds of fault parameters,the Okada model was used in the initial stage of the tsunami,the model directly treated the seabed topography as a water surface change,the COMCOT tsunami propagation model was used to numerically simulate the earthquake and tsunami that occurred in the Solomon Islands on February 6,2013.In addition,the thesis compared the simulation results with the actual observation data of the DART station.The results showed that the tsunami numerical simulation results of the fault length,width and sliding amount calculated by the empirical formula of JMA were more in line with the actual observation data of the tsunami.The conclusions of this paper had practical reference significance for determining the fault parameters of the tsunami numerical simulation in the Solomon Islands and surrounding seas.