![]() ![]() A promising alternative forĪssimilating water surface elevations consists of assimilating water surface elevation anomalies which do not depend on a reference surface. Measured water surface elevations remains however a challenge and can introduce within the system large bias. Global-scale models in order to correct their input parameters and reduce their associated uncertainty. SWOT will provide a significant number of new observations for river hydrology and maybe combined, through data assimilation, with Incoming Surface Water and Ocean Topography (SWOT) satellite mission, with a launch scheduled for 2021 and with a required lifetime of at leastģ years, will be dedicated to the measuring of water surface elevations, widths and surface slopes of rivers wider than 100 m, atĪ global scale. Of water flows and storages, but they are not without non-negligible uncertainties, among which inexact input parameters play a significant part. Land surface models combined with river routing models are widely used to study the continental part of the water cycle.
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