Tsunami Runup Height of Various Initial WaveformsUsing Analytical Green’s Function

• Main Authors: Yi-Fan Chen, 陳逸凡
• Other Authors: Guan-Yu Chen
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/60216147414214990372

碩士 === 國立中山大學 === 海下科技暨應用海洋物理研究所 === 101 === According to the CWY approach derived by Carrier et al. (2003) based on 1-D fully nonlinear shallow water equations over a uniform constant slope, it can have all possible waveforms for the conditions of various initial waveforms, then determine the highest runup height. The arbitrary water elevation is called analytical Green’s function (AGF) by CWY. It can be developed a fast forecast system for the tsunami elevation beside the inshore coasts of Taiwan based on the analytical Green’s function. The different amplitude ratios (A1/A2) can generate the arbitrary waveforms, it is shown that the PG wave (A1/A2 =0) and the M1 wave (A1/A2 =1.2) has the highest runup height and the farest inundation distance comparing with other possible waveforms as A2 is negative. Additionally, the continuous PG wave result is coincident with the single PG wave. Then change the parameter k that mean period of the two waveforms, it is shown that the M1 wave (k1=33, k2=1.69, k1 /k2=19.5266) has the higher runup height then the PG wave. It may be resulted from the overlap of the runup of the two wave. The temporal interval t01 and t02 are fixed at the before mentioned, Then to shortened the temporal interval x01 and x02 , as it equal to 1, has the worsest result. To verify the CWY approach, simulations on Cornell Multigrid Coupled Tsunami (COMCOT) model is also executed and the results agrees well with the CWY results.