Application of the TELEMAC-3D to simulate TELEMAC- 3D flooding and - - PowerPoint PPT Presentation

Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

Application of the TELEMAC-3D to simulate flooding and hydrodynamics patterns of Southern Brazilian wetlands

Juliana Costi, Aldair Forster, Wiliam Correa Marques, Raquel de Freitas, Jorge Arigony-Neto

Laboratório de Análise Numérica e Sistemas Dinâmicos - LANSD Instituto de Matemática, Estatística e Física - IMEF Universidade Federal do Rio Grande - FURG

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

WETLANDS IN SOUTHERN BRAZIL

GLOBAL IMPORTANCE RAMSAR CONVENTION RICH BIODIVERSITY HIGH PRODUCTIVITY ECOSSYSTEM SERVICES

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

STUDY SITE MIRIM - SÃO GONÇALO SYSTEM

SHALLOW LAGOON AND CHANNEL FLAT COASTAL PLAIN EXTENSIVE WETLANDS SUBTROPICAL CLIMATE MARKED SEASONALITY

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

STUDY SITE MIRIM - SÃO GONÇALO SYSTEM

HYDRODYNAMICS AND FLOODING PREVIOUS STUDIES Water levels are higher in the southern Mirim Lagoon (Costi et al. 2018) Water residence time is higher in the southern Mirim Lagoon (Silva et al. 2018) Variability is predominantly dominated by different cycles in the southern/northern Mirim Lagon (Costi et al., in review)

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

QUESTIONS

How does it influences the flooding patterns of wetlands? Do southern wetlands present higher water levels and are more frequently flooded?

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

TELEMAC-3D MODELLING

NUMERIC EXPERIMENT 1-year experiment (2000) Tributaries discharge and water level at the liquid boundaries Wind, air pressure and temperature at the surface boundary Manning coefficient of 0.035 (lagoon and channel beds) and 0.05 (wetlands)

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

TELEMAC-3D MODELING

WETLANDS DIVISION

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

RESULTS VALIDATION

WATER LEVEL MEASUREMENTS AT 2 GAUGE STATIONS 6 ERS-2 IMAGERY DERIVED FLOOD MAPS Water level correlation: 0.61 Water level average error: −0.6m Agreement of flooded areas: 65%

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

RESULTS FLOODING AND HYDRODYNAMIC PATTERNS

WATER LEVEL SEASONALITY

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

RESULTS FLOODING AND HYDRODYNAMIC PATTERNS

WATER LEVEL

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

RESULTS FLOODING AND HYDRODYNAMIC PATTERNS

ZONAL VELOCITY OF CURRENT

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

CONCLUSIONS

River discharge dominates the temporal variability of flooding Topography explains São Gonçalo Channel wetlands’ higher water levels Wind action increases circulation and exchanges between the lagoon and wetlands

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

THIS PROJECT IS SUPPORTED BY

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Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg.

juliana.costi@furg.br

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