Jean-François Cretaux
Jean-François Cretaux  Email | Website
Laboratoire d'Études en Géophysique et Océanographie Spatiales (LEGOS)
SWOT Science Leadership | River Algorithms, Models & Data Assimilation
Projects
River Discharge Estimation Under Uncertainty from Synthetic SWOT-type Observations Using Variational Data Assimilation
Water Level and Discharge Estimation with a Polynomial Surrogate Model for Uncertainty Quantification and Data Assimilation - Application to a Real Test Case: The Garonne Valley
Co-Investigators
Sylvain Biancamaria, Pierre-André Garambois, Pierre-Olivier Malaterre, Sophie Ricci, Hélène Roux
Recent SWOT-related Publications | See All
Characterization and Space-Time Downscaling of the Inundation Extent over the Inner Niger Delta Using GIEMS and MODIS Data (2014)
Evaluation of the ISBA-TRIP Continental Hydrologic System Over the Niger Basin Using In Situ and Satellite Derived Datasets (2012)

Meeting Presentations (36)

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Hydrology Breakout Session Summaries [presentation]
Hydrology Leads (28-Jun-18)
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SWOT Science Team Early Adopters from South America [presentation]
Papa, F., Gosset, M., Abarca del Rio, R., Calmant, S., Crétaux, J-F., and Pavelsky, T. (27-Jun-18)
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Progress in Lake Water Storage Algorithms [presentation]
Quellec, M. Cretaux, J-F. (27-Jun-18)
Presentation not available
Meeting Objectives [presentation]
Fu, L-L., Morrow, R., Cretaux, J-F., and Pavelsky, T. (26-Jun-18)
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Walk-Through of French Pre-Launch and Post-Launch Cal/Val Plans [presentation]
Calmant, S. and Cretaux, J-F. (29-Jun-17)
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Lake Volume Determination with SWOT [presentation]
Cretaux, J-F., Lagrelle, Q., Fruteau, L., and Pottier, C. (28-Jun-17). [View the video found on slide 4.]
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A Priori Geoid Dataset [presentation]
Cretaux, J-F. (27-Jun-17)
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Hydrology Keynote Presentation: The Role of SWOT in Global Lake Science [presentation]
Cretaux, J-F. and Pavelsky, T. (26-Jun-17)
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Hydrology Data Products: Current Status and On-Going Work [presentation]
Pottier, C., Callahan, P., Durand, M., Pavelsky, T., Biancamaria, S., and Cretaux, J-F. (26-Jun-17)
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Seasonal HR Coverage - Trade for Northern Hemisphere Sea-Ice and Snow-Covered Land? [presentation]
Pavelsky, T., Cretaux, J-F., and Kwok, R. (26-Jun-17)
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Hydrology Science and Applications from the Surface Water and Ocean Topography (SWOT) Mission [presentation]
Cretaux, J-F. and Pavelsky, T. (13-Dec-16). Because SWOT will measure temporal variations in the height, width, and slope of rivers, several algorithms have been developed to estimate river discharge solely from SWOT measurements. Additionally, measurements of lake height and area will allow estimation of variability in lake water storage. In this introductory presentation, we will discuss SWOT's capabilities and the science questions that it will aim to address.
Poster not available
Integrating Lateral Contributions Along River Reaches to Improve SWOT Discharge Estimates [poster]
Beighley, E., Zhao, Y., Feng, D., Fisher, C.K., Raoufi, R., Durand, M.T., David, C.H., Lee, H., Boone, A.A., and Cretaux, J-F. (13-Dec-16). One derived data product planned for the SWOT mission is river discharge. Although there are several discharge algorithms that perform well for a range of conditions, this effort is focused on the MetroMan discharge algorithm. For example, in MetroMan, lateral inflow assumptions have been shown to impact performance. Here, the role of lateral inflows on discharge estimate performance is investigated.
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Vector Data Products [presentation]
Pavelsky, T. and Cretaux, J-F. (16-Jun-16)
Poster
Estimation of River Discharge from SWOT Data: Algorithms, Assimilation and Error Budget [poster]
Monnier, J., Ricci, S., Roux, H., Garambois, P., Malaterre, P., Gosset, M., Goutal, N., Cretaux, J., Biancamaria, S., Calmant, S., Chorda, J., Rochoux, M., Montazem, A., Gejadze, I., Brisset, P., and Oubanas, H. (14-Jun-16)
Poster
Synergies Between SWOT & L-Band Sensors Over Wetlands [poster]
Al Bitar, A., Parens, M., Kerr, Y., Frappart, F., Papa, F., Cretaux, J., Calmant, S., Paiva, R., Neuhaser, M., and Bonnet, M. (14-Jun-16)
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Planned Approach to SWOT Hydrology Cal/Val [presentation]
Cretaux, J-F., and Pavelsky, T. (09-Jul-15)
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Summary & Final Discussion [presentation]
Fu, L-L., Morrow, R., Cretaux, J-F., Pavelsky, T. (09-Jul-15)
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Lake Vector Products [presentation]
Pavelsky, T. and Cretaux, J-F. (08-Jul-15)
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Hydrology [presentation]
Pavelsky, T. and Cretaux, J-F. (07-Jul-15)
Presentation not available
Hydro Issues for Pre-summing Factor of 2-2.5 [presentation]
Pavelsky, T., Cretaux, J-F., and Rodriguez, E. (07-Jul-15)
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Objectives of the 1-D Fast Sampling [presentation]
Cretaux, J-F. (07-Jul-15)
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Upcoming Science Priorities [presentation]
Cretaux, J-F. and Pavelsky, T. (15-Jan-15)
Presentation not available
AirSWOT Hydrology Campaign Update [presentation]
Rodriguez, E., Cretaux, J-F., and Durand, M. (14-Jan-15)
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Digital Elevation Models (DEMs) and SWOT [presentation]
Pavelsky, T., Esteban-Fernandez, D., Rodriguez, E., Andreadis, K., Biancamaria, S., Cretaux, J-F., Durand, M., Fjørtoft, R., Lettenmaier, D., and Smith, L. (14-Jan-15)
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Lake Data Products [presentation]
Pavelsky, T. and Cretaux, J-F. (14-Jan-15)
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Validation Sites [presentation]
Cretaux, J-F. (13-Jan-15)
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SWOT and Transboundary Basins Management [presentation]
Calmettes, S., Biancamaria, S., Cretaux, J-F., Busca, D., Becerra, S., Frappart, F., Calmant, S., and Papa, F. (16-Jan-14)
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Hydrology Splinter Results [presentation]
Pavelsky, T. and Cretaux, J-F. (16-Jan-14)
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The Impact of SWOT on Hydrologic Science: Part One, Rivers & Floodplains [presentation]
Durand, M., Pavelsky, T., Smith, L., Gleason, C., Cretaux, J-F., Hossain, F., and Biancamaria, S. (14-Jan-14)
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Water Storage from Local to Global from Now to SWOT [presentation]
Cretaux, J-F., Durand, M., Pavelsky, T., Smith, L., Aires, F., Yesou, H., Biancamaria, S., and Lemoigne, P. (14-Jan-14)
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SWOT Error Performance Discussion [presentation]
Morrow, R. and Cretaux, J-F. (14-Jan-14)
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SWOTLAKE: Lake Modelling at Global Scale [presentation]
Le Moigne, P., Decharme, B., Cretaux, J-F., and Biancamaria, S. (28-Jan-13)
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SWOT Modeling over Yangtze Middle Reaches [presentation]
Yesou, H., Blumstein, D., Cretaux, J-F., Uribe, C., Dailet, S., and Huber, C. (28-Jan-13)
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What Should we Calibrate/Validate in SWOT? [presentation]
Calmant, S., Cretaux, J-F., and Mognard, N. (22-Sep-10)
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Conventional Altimetry for Monitoring Lake Level Changes and Improvements from SWOT [presentation]
Cretaux, J-F. (15-Sep-08)
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Hydrological Modelling of the Ob River [presentation]
Biancamaria, S., Mongard, N., Bates, P., Boone, A., and Cretaux, J-F. (01-Feb-08)

Publications (2)

Aires, F., Papa, F., Prigent, C., Crétaux, J-F., and Berge-Ngyuen, M. (2014). Characterization and Space-Time Downscaling of the Inundation Extent over the Inner Niger Delta Using GIEMS and MODIS Data, J. Hydrometeor., 15, 171-192, doi: 10.1175/JHM-D-13-032.1.
Pedinotti V., Boone, A., Decharme, B., Crétaux, J-F., Mognard, N., Panthou, G., Papa F., and Tanimoun, B.A. (2012). Evaluation of the ISBA-TRIP Continental Hydrologic System Over the Niger Basin Using In Situ and Satellite Derived Datasets, Hydrol. Earth Syst. Sci., 16, 1745-1773, doi: 10.5194/hess-16-1745-2012.

Documents (3)

Water Level and Discharge Estimation with a Polynomial Surrogate Model for Uncertainty Quantification and Data Assimilation - Application to a Real Test Case: The Garonne Valley
PI: Jean-François Cretaux (16-Jun-17). The group is composed of CECI (CERFACS/CNRS, Toulouse, France) and LNHE (EDF R&D, Chatou, France). It gathers expertise in hydraulic modeling (TELEMAC-MASCARET software) and applied mathematics with a focus on uncertainty quantification (UQ) (sampling, analysis of variance, surrogate models) and data assimilation (DA) (ensemble-based methods, filtering algorithms, variational methods). The group has been working together for several years; the most significant developments stand in the implementation of Kalman Filter derived algorithm for model state and parameters correction via DA of inset observations and its operational use for flood forecasting and water resource management. A perspective for these studies, developed here, is to use Surface Water and Ocean Topography (SWOT) data to improve hydraulic model parameters and results and consequently improve water level and discharge simulation and forecast.
River Discharge Estimation Under Uncertainty from Synthetic SWOT-type Observations Using Variational Data Assimilation
PI: Jean-François Cretaux (09-Jun-17). Variational data assimilation has been applied for discharge estimation under uncertainties in river bathymetry and bed roughness using the hydraulic model SIC2. Synthetic WSE measurements, which emulate the spatial and temporal sampling of the SWOT mission, are assimilated for the Garonne River downstream reach. Similar tests have been carried out on the Po and Sacramento Rivers using the SWOT hydrology simulator developed at JPL. We investigate simultaneous estimation of discharge, river bathymetry and bed roughness in the framework of the extended control vector approach.
SWOT Applications Plan
Srinivasan, M., Peterson, C., Andral, A., Dejus, M., Hossain, F., Cretaux, J-F., and Beighley, E. (26-Sep-14). This Plan outlines the applications-oriented Project and international partner efforts which are planned for the SWOT mission, outlines an approach to engaging the SWOT and AirSWOT end user community, and describes the methods to be used to achieve a successful and relevant program.