WP03: ANALYTICAL TOOLS, MODELS
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Transcript of WP03: ANALYTICAL TOOLS, MODELS
WP03: ANALYTICAL TOOLS, MODELS
TELEMAC MODELLING PROGRESS
WP03: ANALATICOL TOOLS, MODELS
PLANPLAN
Characteristics of the studied areaCharacteristics of the studied area
Water quality issuesWater quality issues
Data descriptionData descriptionModel constructionModel construction
ScenariosScenarios simulatedsimulated
Results discussionResults discussion
constructionconstruction of the second model of the second model
WP03: ANALATICOL TOOLS, MODELS
The coastline of Hammamet contains 12 little oueds draining small watersheds which have no have no influence on hydrodynamism of Gulf Hammamet
This region is sheltered from the general Mediterranian currents (N-S) (N-S) thanks to the Cap Bon “peninsula”.
The tide in the gulf of Hammamet is semi-diurnal and has slight amplitude (20 cm). it has no influence on hydrodynamism
the most important factor that affects the hydrodynamism in the region is the wind
Characteristics of the studied areaCharacteristics of the studied area
WP03: ANALATICOL TOOLS, MODELS
Water quality issuesWater quality issues
Our case study simulates the Our case study simulates the impact of a recycled water impact of a recycled water discharge (from the station discharge (from the station STEP3 STEP3 ) ) on the swimming water quality on the swimming water quality through an off-shore emissary. So, through an off-shore emissary. So, we do monitor the dispersion plume we do monitor the dispersion plume of COD and BOD coming from the of COD and BOD coming from the emissary that is 1600 m far from the emissary that is 1600 m far from the coast and laying at –23m depth.coast and laying at –23m depth.
The objective of this stady is to The objective of this stady is to know how polluants are disperced know how polluants are disperced in the gulf of Hammamet ( plume in the gulf of Hammamet ( plume extend, affected zones);extend, affected zones);
Even if the rejections are conform Even if the rejections are conform to national standards this exercice to national standards this exercice will allow us to implement an early will allow us to implement an early warning system and action plan in warning system and action plan in the case of break down of treatment the case of break down of treatment station or over flow;station or over flow;
Sustainable management of STEP3 Sustainable management of STEP3 can be released from this study.can be released from this study.
We note that Hammamet is a very important region for the seaside tourism. In such context We note that Hammamet is a very important region for the seaside tourism. In such context we must be vigilant and able to face any possibility of marine contamination.we must be vigilant and able to face any possibility of marine contamination.
WP03: ANALATICOL TOOLS, MODELS
Bathymetry extracted from topographic map (1/25000)
Data descriptionsData descriptions
WP03: ANALATICOL TOOLS, MODELS
DEM generated by MATISS and plotted with RUBENS
Data descriptionsData descriptions
Flow variation of the water treatment station (STEP3)
66
48
38
23
60
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108112
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127 128
125 120
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WP03: ANALATICOL TOOLS, MODELS
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Variation of DBO5
DBO5 input (mg/l)
DBO5 output (mg/l)
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Data descriptionData description
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Variation of DCO
DCO input (mg/l)
DCO output(mg/l)
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Data descriptionsData descriptions
WP03: ANALATICOL TOOLS, MODELS
Model constructionModel construction 19804 meshes 10090 nodes
Modelling domain
Boundary conditionSolid limit (2222)
Boundary conditionimposed Level (5445): 0 m
Two kinds of boundary conditionsTwo kinds of boundary conditions
Model constructionModel construction
WP03: ANALATICOL TOOLS, MODELS
WP03: ANALATICOL TOOLS, MODELS
315°(20 m/s)
90°(26 m/s)
ScenariosScenarios simulated simulated TELEMAC2DTELEMAC2D
WP03: ANALATICOL TOOLS, MODELS
ScenariosScenarios simulated simulated SUBIEF2DSUBIEF2D
The hydrodynamic model needs more accurate data and The hydrodynamic model needs more accurate data and adjustement to restitute faithfully the realityadjustement to restitute faithfully the reality
We did revew input data and parameters:We did revew input data and parameters: Acquisition of detailed wind series dataAcquisition of detailed wind series data Acquisition of more pricise bathymetric dataAcquisition of more pricise bathymetric data Model extendModel extend Conception of new meshesConception of new meshes Reconsideration of the boundary conditions Reconsideration of the boundary conditions Acquisition of boundary conditions value (velocity) fram a model implemented overall tunisian coastal line ( INSTM research group)Acquisition of boundary conditions value (velocity) fram a model implemented overall tunisian coastal line ( INSTM research group)
Results discussionResults discussion
Construction of new modelConstruction of new model
WP03: ANALATICOL TOOLS, MODELS
WP03: ANALATICOL TOOLS, MODELS
Construction of the second modelConstruction of the second model
Integration of more Integration of more detailed bathymetry and detailed bathymetry and new modelling domainenew modelling domaine
bathymetry plotted on bathymetry plotted on RUBENSRUBENS
WP03: ANALATICOL TOOLS, MODELS
elements Number :elements Number :
1510615106
Number of nodes :Number of nodes :
78747874
Length Length max :Length Length max :
1461m1461m
min :min :
1m1m
Meshe parametres parametresConstruction of the second modelConstruction of the second model
WP03: ANALATICOL TOOLS, MODELS
Construction of the second modelConstruction of the second model
WP03: ANALATICOL TOOLS, MODELS
Boundary Boundary conditionsconditionsConstruction of the second modelConstruction of the second model