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ADVANCES IN NUMERICAL MODELING AND DATA
ANALYSIS ON WATER RESOURCES RELATED ISSUES
Rodrigo Amado Garcia Silva
Contact: [email protected]
SUMMER SCHOOL ON DATA SCIENCE
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Coastal and Oceanographic Engineering Area (Ocean Engineering Program)
➢ Research Engineer (postdoc)
➢ Issues: Environmental hydrodynamics, wave generation and propagation, sediment
transport, coastal vulnerability, water quality
HidroAmb – Water Resources and Environmental Engineering
➢ Director and Environmental Engineer
➢ Issues: the same
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Water resources related issues
➢ Environmental Hydrodynamics
➢ Wave generation and propagation
➢ Sediment transport
➢ Pollutant transport and dispersionHydrodynamics
Morphodynamics
Wave propagation
Effluent dispersion
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Water resources related issues
➢ Environmental Hydrodynamics
➢ Wave propagation
➢ Sediment transport
➢ Pollutant transport and dispersion
ALL NONLINEAR PHENOMENA!!
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Water resources related issues
➢ Environmental Hydrodynamics
➢ Wave propagation
➢ Sediment transport
➢ Pollutant transport and dispersion
ALL NONLINEAR PHENOMENA!!
Simulation requires numerical solution
of nonlinear differential equations
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➢Computational modeling systemprovided by COPPE/UFRJ
➢Environmental modeling of waterbodies with complex geometry, asrivers, estuaries, lagoons, bays, coasts,reservoirs, etc.
➢Open code (Fortran) free software
➢Finite elements and finite differencenumerical models
SisBaHiA – Environmental Hydrodynamics Base System
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How does it work?
Example: Ilhabela – SP
Santos
Ilhabela
Bertioga
SP
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How does it work?
Example: Ilhabela – SP
➢ Digital terrain model
Santos
Ilhabela
Bertioga
SP
Finite elements mesh
Bathymetry data
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How does it work?
Example: Ilhabela – SP
➢ Digital terrain model
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How does it work?
Example: Ilhabela – SP
Simulated phenomena: wind waves generation
Input data:
➢ Bathymetry (DTM)
➢ Winds
➢ Boundary conditions
Wind field
Open boundary(ocean)
Land boundary(zero flux)
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How does it work?
Example: Ilhabela – SP
➢ Results
Wave height (m)
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How does it work?
Example: Ilhabela – SP
➢ Results
Wave period (m)
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How does it work?
Example: Ilhabela – SP
➢ ResultsWave inside the harbour
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Data analysis
Bathymetry data
Sea bottom surface
Surfer(2D and 3D mapping)
Interpolation methods
• Kriging• Delaunay triangulation• Minimum curvature• Natural neighbor• etc
Google Earth(model domain)
Georeferenced map layers
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Data analysis
• Wind data acquisition
Wind dataanalysis
Grapher(2D and 3D graphing
and analysis)
Global athmospheric models
• Wind data
• NETCDF format
• Python interface
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Results analysis
Model setup and execution
Microsoft Access(or any similar database tool)
Grapher(temporal results)Surfer
(spatial results)
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➢ Nearshore morphological processes
➢ Wave induced sediment transport
Research and Development
Mucuripe
Port
Fortaleza - CE
Coastal erosion
Port sedimentation
Pereira et al. (2017)
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NMMBom
tempo
Perfil de bom tempo
Beach erosion
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NMMBom
tempo
Perfil de bom tempo
Beach erosion
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NMMBom
tempo
Perfil de bom tempo
Beach erosion
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NMMBom
tempo
Perfil de bom tempo
Beach erosion
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NMMBom
tempo
Perfil de bom tempo
Beach erosion
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Berma de bom tempo
Duna
Beach erosion model
Beach Profile
water level
Model result
Measured
Initial
Wave tank
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Berma de bom tempo
Duna
Beach erosion model
Beach Profile
water level
Model result
Measured
Initial
Wave tank
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Duna
Beach erosion model
➢ Good results
Berma de bom tempo
Beach Profile
water level
Model result
Measured
Initial
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Duna
Beach erosion model
➢ Good results
➢ Highly dependent on case to case calibration
Berma de bom tempo
Beach Profile
water level
Model result
Measured
Initial
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Duna
Beach erosion model
➢ Good results
➢ Highly dependent on case to case calibration
➢ Several parameters involved
Berma de bom tempo
Beach Profile
water level
Model result
Measured
Initial
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Duna
Beach erosion model
➢ Good results
➢ Highly dependent on case to case calibration
➢ Several parameters involved
➢ Nonlinearity expressed in the data
Berma de bom tempo
Beach Profile
water level
Model result
Measured
Initial
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Duna
Beach erosion model
➢ Good results
➢ Highly dependent on case to case calibration
➢ Several parameters involved
➢ Nonlinearity expressed in the data
➢ Upcoming research: how to find a pattern?
Berma de bom tempo
Beach Profile
water level
Model result
Measured
Initial
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Duna
Beach erosion model
➢ Good results
➢ Highly dependent on case to case calibration
➢ Several parameters involved
➢ Nonlinearity expressed in the data
➢ Upcoming research: how to find a pattern?
➢ Machine learning
Berma de bom tempo
Beach Profile
water level
Model result
Measured
Initial
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Duna
Machine learning
Several methods:
➢ Artificial neural networks;
➢ Genetic algorithms;
➢ Bayesian networks;
➢ Regression trees;
➢ etc
Goldstein et. al (2019)