Preprints
https://doi.org/10.5194/egusphere-2023-1365
https://doi.org/10.5194/egusphere-2023-1365
30 Jun 2023
 | 30 Jun 2023

Nonlinear processes in tsunami simulations for the Peruvian coast with focus on Lima/Callao

Alexey Androsov, Sven Harig, Natalia Zamora, Kim Knauer, and Natalja Rakowsky

Abstract. This investigation addresses the tsunami flooding in Lima and Callao caused by the massive 1746 earthquake (Mw 9.0) along the Peruvian coast. Numerical modelling of the tsunami flooding processes in the nearshore includes strong nonlinear numerical terms. In a comparative analysis of the calculation of the tsunami wave effect, two numerical codes are used, Tsunami-HySEA and TsunAWI, which both solve the shallow water (SW) equations but with different spatial approximations. The comparison primarily evaluates the flow velocity fields in flooded areas. The relative importance of the various parts of the SW equations is determined, focusing on the nonlinear terms. Particular attention is paid to the contribution of momentum advection, bottom friction, and volume conservation. The influence of the nonlinearity on the degree and volume of flooding, flow velocity and small-scale fluctuations is determined. The sensitivity of the solution with respect to the value of the bottom friction parameter is investigated as well.

Alexey Androsov, Sven Harig, Natalia Zamora, Kim Knauer, and Natalja Rakowsky

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1365', Anonymous Referee #1, 27 Jul 2023
  • RC2: 'Comment on egusphere-2023-1365', Anonymous Referee #2, 09 Nov 2023
Alexey Androsov, Sven Harig, Natalia Zamora, Kim Knauer, and Natalja Rakowsky
Alexey Androsov, Sven Harig, Natalia Zamora, Kim Knauer, and Natalja Rakowsky

Viewed

Total article views: 354 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
244 85 25 354 19 21
  • HTML: 244
  • PDF: 85
  • XML: 25
  • Total: 354
  • BibTeX: 19
  • EndNote: 21
Views and downloads (calculated since 30 Jun 2023)
Cumulative views and downloads (calculated since 30 Jun 2023)

Viewed (geographical distribution)

Total article views: 369 (including HTML, PDF, and XML) Thereof 369 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 21 Feb 2024
Download
Short summary
Two numerical codes are used in a comparative analysis of the calculation of the tsunami wave due to an earthquake along the Peruvian coast. The comparison primarily evaluates the flow velocity fields in flooded areas. The relative importance of the various parts of the equations is determined, focusing on the nonlinear terms. The influence of the nonlinearity on the degree and volume of flooding, flow velocity and small-scale fluctuations is determined.