M. Liste 1, M. Grifoll 2, I. Keupers 1, J. Fernández 3, H. Ortega 1, J. Monbaliu 1

Transcription

1 M. Liste 1, M. Grifoll 2, I. Keupers 1, J. Fernández 3, H. Ortega 1, J. Monbaliu 1 1 Hydraulics Laboratory (K.U.Leuven, Belgium) 2 Laboratori d Enginyeria Marítima (LIM/UPC, Spain) 3 SIMO, Spain.

2 Motivation Coastal ocean regions are dynamic and complex environments that are driven by an intricate interaction between: - atmospheric - oceanographic - estuarine/riverine - land sea processes Freshwater discharge from rivers and urban outflows to the ocean has profound effects in coastal waters. Examples of satellite images of river mouths a good understanding of the mixing and transport processes in river plumes is required for the maintenance of coastal ecosystems and their resources. Examples of boundaries between river and sea

3 Motivation The combination of: satellite ocean data in situ coastal ocean measurements use of numerical models offer exciting opportunities to improve the knowledge of the ocean dynamics, in coastal areas. Example of satellite images. SST Mediterranean Sea. (Source: GHRSST group) Example of the total suspended matter in the Catalan Coast (Source : MERIS satellite image. ESA). Examples of buoys. (Source: XIOM 2010) Example of CTD

4 Motivation In the Catalan coast the combination of: local topography torrential rainfall local runoff on a short time large impact on the receiving coastal waters General objective: to get a better ocean circulation model specific task: Flooding in Barcelona city during a Storm to compare the results from a coastal circulation model with data from dedicated campaigns and satellite observations (Besòs River runoff after a Barcelona Storm. 2011)

5 Outline Data Needs Modelling tool Coastal Circulation Model Model Domain and grid Model Set-up Validation Atmospheric forcing Initial condition-sea boundary condition Land forcing Field_AC campaign Satellite image Results Conclusion Future work

6 1. Data Needs 2. Modeling tool 1. Data Needs Coastal model grid (LIM\UPC) Ocean Forcing (LIM\UPC) INPUTS Land Boundary Fluxes (K.U.Leuven) Coastal Model OUTPUTS 2. Modeling tools 2.1 Coastal circulation model Regional Ocean Model System (ROMS) - vertical coordinates (σ) -low-order finite difference scheme

7 2. Modeling tools Model domain and grid Regional model (dx~2.3km) SHECAT model (dx~1km) 2. Modeling tools 2.2 Model domain and grid Coastal model (dx~250) Coastal Model Bathymetry - High Resolution Bathymetry - 152x207 grid cells m x 250 m of horizontal resolution - 20 sigma vertical levels

8 2. Modeling tools 2.3 Model Set-up Model set-up Atmospheric forcing -Barcelona Super Computing Center (BSC) -1 km of resolution Initial Condition Sea Boundary Condition -MyOcean project (

9 Model set-up CALIOPE air quality Model (BSC) 2. Modeling tools 2.3 Model set-up Land forcing Two representative rivers : Llobregat and Besòs River. Accumulate Rainfall per hour River basin Rainfall runoff Model (KUL) and Combined Serwer Overflow Model (KUL) (Keupers et al., 2011) flow temporal series (m 3 /s) Besos and Llobregat river discharge during a storm event (17 March 2011) and normal conditions (11 April 2011). River runoff into the Coastal model

10 3. Validation 3. Validation Field Campaign CTD, Currents and Waves measurements in the Besòs River area 43 CTD profile measurements during a 'post-rain' period, corresponding to 17/Mar/ CTD profile measurements during a 'normal' (i.e., dry) period, corresponding to 11/Apr/2011

11 3. Validation CTD versus ROMS profiles in the Besòs river area 3. Validation

12 3. Validation CTD versus ROMS profiles in the Besòs river area 3. Validation

13 3. Validation CTD versus ROMS profiles in the Besòs river area 3. Validation

14 3. Validation Remote Sensing: 3. Validation Measurements from : MODIS, MERIS, AVHRR, AATSR, Sea surface temperature centred on the Alboran Sea. (Source: MyOcean)

15 3. Validation. 3. Validation SST from OSTIA system (Operational Sea surface Temperature and sea Ice Analysis (Stark et al. 2007))

16 3. Validation 3. Validation SST from MODIS (MODerate resolution Imaging Spectroradiometer) (data provide by MUMM) Catalan Coast area

17 3. Validation 3. Validation SST from MODIS (MODerate resolution Imaging Spectroradiometer) Catalan Coast zoom area

18 3. Validation Surface temperature from ROMS results 3. Validation Catalan Coast area

19 3. Validation 3. Validation TSM from MODIS (MODerate resolution Imaging Spectroradiometer) (data provide by MUMM) Catalan Coast area

20 3. Validation 3. Validation TSM from MODIS (MODerate resolution Imaging Spectroradiometer) Catalan Coast zoom area

21 3. Validation 3. Validation TSM from MODIS versus Salinity from ROMS results on March Catalan Coast zoom area

22 3. Validation TSM from MODIS versus Salinity from ROMS results on March Catalan Coast zoom area 3. Validation

23 3. Validation TSM (MODIS) overlay into the Salinity (ROMS result). 3. Validation

24 4. Results Surface Salinity and Wind (ROMS result 17 March 2011) 4. Results

25 5. Conclusion 5. Conclusion the results from a coastal circulation model (ROMS) have been compared with campaigns data and satellite observation to the Catalan Coast area. ROMS model results have shown the freshwater inflow into the coastal waters The salinity profiles from campaign versus model indicate a similar behavior, but the values of the salinity (ROMS) are overestimated. the ROMS result plume has qualitative similarities with the satellite observation data: the values of the temperature from ROMS data shows a slight correspondence with a surface plume that can be observed in the satellite data the shape of the salinity plume from ROMS has similarities with the total suspended matter plume observed in the Satellite data.

26 6. Future work 6. Future work to obtain a higher correspondence between the campaign data and ROMS profile results by checking: Campaign data My Ocean inputs to run ROMS model including the sediment transport module (TSM outputs) Total suspended matter in the Catalan coast (Source : MERIS satellite image. European Space Agency). to implement the locl grid resolution (30x30m) into the regional grid domain (250x250). Nesting grid 250 meters to 30 meters

27 6. Future work 6. Future work to include urban run-off in the local grid. to compare the new results with a satellite data. Location of the CSO outflows and the Besòs River maria.listemunoz@bwk.kuleuven.be

28 Acknowledge: END