SWOT Monitoring of Land-Water Interfaces Topography: Intertidal Coastal Areas and River Floodplains

River floodplains and intertidal coastal environments are key areas for which the Surface Water and Ocean Topography (SWOT) altimetry mission is expected to provide valuable data, improving our ability to monitor these dynamic systems. SWOT provides water surface extent and elevation for continental water surfaces globally and regularly. This article presents two methods to derive the topography of such environments from SWOT data. The first one, the waterline method, is the approach currently developed to produce worldwide floodplain/intertidal DEM. The second method uses a direct approach by exploiting InSAR heights extracted directly from SWOT products. An example is shown for the Bay of Veys located in Normandy (France).