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

Wetlands in Southern Brazil Study Site Application of the TELEMAC-3D to simulate TELEMAC- 3D flooding and hydrodynamics patterns of Southern modelling Validation Brazilian wetlands Wetlands hy- drodynamics analysis Conclusions Juliana Costi, Aldair Forster, Wiliam Correa Marques, Aknowledg. 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 1 / 14

WETLANDS IN SOUTHERN BRAZIL GLOBAL IMPORTANCE RAMSAR CONVENTION RICH BIODIVERSITY Wetlands in Southern HIGH PRODUCTIVITY Brazil ECOSSYSTEM SERVICES Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg. 2 / 14

STUDY SITE MIRIM - SÃO GONÇALO SYSTEM SHALLOW LAGOON AND CHANNEL FLAT COASTAL PLAIN EXTENSIVE WETLANDS Wetlands in Southern SUBTROPICAL CLIMATE Brazil MARKED SEASONALITY Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg. 3 / 14

STUDY SITE MIRIM - SÃO GONÇALO SYSTEM HYDRODYNAMICS AND FLOODING Wetlands in Southern Brazil PREVIOUS STUDIES Study Site Water levels are higher in the southern Mirim Lagoon TELEMAC- ( Costi et al. 2018 ) 3D modelling Water residence time is higher in the southern Mirim Validation Lagoon ( Silva et al. 2018 ) Wetlands hy- drodynamics Variability is predominantly dominated by different cycles analysis in the southern/northern Mirim Lagon ( Costi et al., in Conclusions review ) Aknowledg. 4 / 14

QUESTIONS Wetlands in Southern Brazil Study Site How does it influences the flooding patterns of wetlands? TELEMAC- 3D Do southern wetlands present higher water levels and are modelling Validation more frequently flooded? Wetlands hy- drodynamics analysis Conclusions Aknowledg. 5 / 14

TELEMAC-3D MODELLING Wetlands in Southern NUMERIC EXPERIMENT Brazil 1-year experiment (2000) Study Site TELEMAC- Tributaries discharge and water level at the liquid 3D modelling boundaries Validation Wind, air pressure and temperature at the surface boundary Wetlands hy- drodynamics Manning coefficient of 0.035 (lagoon and channel beds) analysis and 0.05 (wetlands) Conclusions Aknowledg. 6 / 14

TELEMAC-3D MODELING WETLANDS DIVISION Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg. 7 / 14

RESULTS VALIDATION WATER LEVEL MEASUREMENTS AT 2 GAUGE STATIONS 6 ERS-2 IMAGERY DERIVED FLOOD MAPS Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Water level correlation: 0.61 Validation Wetlands hy- drodynamics Water level average error: analysis − 0 . 6 m Conclusions Aknowledg. Agreement of flooded areas: 65% 8 / 14

RESULTS FLOODING AND HYDRODYNAMIC PATTERNS WATER LEVEL SEASONALITY Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg. 9 / 14

RESULTS FLOODING AND HYDRODYNAMIC PATTERNS WATER LEVEL Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg. 10 / 14

RESULTS FLOODING AND HYDRODYNAMIC PATTERNS ZONAL VELOCITY OF CURRENT Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg. 11 / 14

CONCLUSIONS Wetlands in Southern Brazil River discharge dominates the temporal variability of Study Site flooding TELEMAC- 3D Topography explains São Gonçalo Channel wetlands’ modelling higher water levels Validation Wetlands hy- Wind action increases circulation and exchanges between drodynamics analysis the lagoon and wetlands Conclusions Aknowledg. 12 / 14

THIS PROJECT IS SUPPORTED BY Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg. 13 / 14

juliana.costi@furg.br Wetlands in Southern Brazil Study Site TELEMAC- 3D modelling Validation Wetlands hy- drodynamics analysis Conclusions Aknowledg. 14 / 14