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Monitoring River Discharge and Water Height Changes in German Rivers, Lakes, Reservoirs by using Fully-Focused and Unfocused SAR Altimeter Products

Authors

Uyanik,  Hakan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Chen,  Jiaming
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Fenoglio,  Luciana
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Kusche,  Jurgen
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Uyanik, H., Chen, J., Fenoglio, L., Kusche, J. (2023): Monitoring River Discharge and Water Height Changes in German Rivers, Lakes, Reservoirs by using Fully-Focused and Unfocused SAR Altimeter Products, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4626


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021035
Abstract
Surface water level is an important indicator of the state of the environment, and monitoring its change is critical for understanding the impacts of climate change and human activity on rivers, lakes and reservoirs.The study focuses on the impact of new generation altimetry observations on the accuracy of water level measurements. It presents a cross-validation analysis of unfocused SAR altimetry(UF-SAR) and fully focused SAR(FF-SAR) products.Although UF-SAR processing indicates a significant improvement in the accuracy of the measurements compared to conventional altimetry (CA), FF-SAR processing offers an improved along track resolution until 0.5 m. The comparison is carried out using statistical techniques to evaluate the accuracy and precision of the measurements.The study also simulates SWOT real data in 1-day and in 21-day repeat and discusses the detection of small scale water level change over the same three types of targets In conclusion, the study investigates the use of UF-SAR and FF-SAR altimetry for monitoring river discharge and water level height changes in German rivers, lakes and reservoirs.