Analysis of the calibration and validation of hydrodynamic simulations with TELEMAC-3D model of the Patos Lagoon

Authors

DOI:

https://doi.org/10.5902/2179460X75144

Keywords:

Three-dimensional Navier-Stokes equations, Hydrostatic hypothesis, Relative mean absolute error, Root mean square error

Abstract

This work presents the analysis of the calibration and validation of the computational model for two configurations of the Jetties of the Rio Grande Barra for hydrodynamic studies of the Patos Lagoon and the continental shelf of southern Brazil. The model used was TELEMAC-3D, which solves the three-dimensional Navier-Stokes equations, considering the hydrostatic hypothesis, to describe the dynamics of free surface geophysical fluids. We developed two finite element triangular meshes, with about 75.000 elements and seven sigma levels. The numerical domain reaches depths up to 2.427 m, with fluvial and oceanic liquid boundaries. The horizontal turbulence model adopted was Smagorinsky and the vertical model of mixing length. Current velocity data obtained from December 2005 were used for calibration, varying the coefficient of wind friction, horizontal and vertical velocity diffusion, and the salinity tracer. The coefficient of wind influence was the factor that most influenced the model results. The calculated Relative Mean Absolute Error was 0.383 dn. for surface and 0.167 dn. for depth, rated good and excellent, respectively. For validation, we evaluated the model performance on reproducing the salinity behavior, related to the depth of the environment, in January 2017. The calculated Root Mean Square Error was 7.37 dn. and the Relative Mean Absolute Error was 0.228 dn., rating the model performance as good. These variances between metrics is uniformly acceptable for real models. Salt transport is a complex phenomenon and depends on both advective and diffusive transport. Thus, it is possible to conclude that he proposed computational model is able to reproduce a complex phenomenon reliably.

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Author Biographies

Nágila Veiga Adrião Monteiro, Federal University of Rio Grande

Mestra em Modelagem computacional - Modelagem de fluido geofísico (FURG, 01/2022). Graduada em Engenheira civil com ênfase em Ambiental - Impactos ambientais de estruturas costeiras, urbanização e áreas de risco (UVA, 10/2017)

Juliana Costi, University of Bordeaux

Oceanóloga (FURG - 2008), mestra em Sensoriamento Remoto (UFRGS - 2011) e doutora em Ciências/Geologia Marinha (UFRGS - 2016). Atualmente, bolsista Capes no Pós-Doutorado na Universitè de Bordeaux, UBX, França.

Pablo Dias da Silva, Federal University of Rio Grande

Possui graduação em Física pela Universidade Federal do Rio Grande (2005) e mestrado em Oceanografia, Física, Química e Geológica pela Universidade Federal do Rio Grande (2011). Atualmente, trabalha no Laboratório de Oceanografia Costeira e Estuarina.

Elisa Helena Leão Fernandes, Federal University of Rio Grande

Engenheira Química (FURG), Mestre em Engenharia Oceânica (FURG), e Doutora em Marine Science pela University of Plymouth, na Inglaterra. Atualmente, sou Professora Titular do Instituto de Oceanografia da Universidade Federal do Rio Grande (FURG). Atua na área de Oceanografia Física Costeira e Estuarina, com especial interesse na aplicação de técnicas de modelagem numérica e sensoriamento remoto para o estudo de processos costeiros e estuarinos e o desenvolvimento sustentável de regiões portuárias.

Liércio André Isoldi, Federal University of Rio Grande

Graduação em Engenharia Mecânica, Graduação em Engenharia Civil e Mestrado em Engenharia Oceânica pela Universidade Federal do Rio Grande, Doutorado em Engenharia pela Universidade Federal do Rio Grande do Sul e Pós-Doutorado vinculado ao Programa de Pós-Graduação em Modelagem Computacional da Universidade Federal do Rio Grande. Atualmente é Professor Associado III da Escola de Engenharia da Universidade Federal do Rio Grande. Professor permanente do Programa de Pós-Graduação em Modelagem Computacional e do Programa de Pós-Graduação em Engenharia Oceânica.

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Published

2023-12-01

How to Cite

Monteiro, N. V. A., Costi, J., Silva, P. D. da, Fernandes, E. H. L., & Isoldi, L. A. (2023). Analysis of the calibration and validation of hydrodynamic simulations with TELEMAC-3D model of the Patos Lagoon. Ciência E Natura, 45(esp. 3), e75144. https://doi.org/10.5902/2179460X75144

Issue

Vol. 45 No. esp. 3 (2023): ENMC/ECTM/MCSul/SEMENGO

Section

Special Edition

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