A joint assimilation of satellite soil moisture and flood extent maps to improve a flood hazard modelling. [* Cross-Reference *]

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Renaud Hostache; Patrick Matgen; Peter Jan van Leeuwen; Nancy Nichols; Marco Chini; Ramona Pelich; Carole Delenne, 2026, "A joint assimilation of satellite soil moisture and flood extent maps to improve a flood hazard modelling. [* Cross-Reference *]", https://lore.list.lu/citation?persistentId=perma:LIST.U7BPAZ, LIST Open Repository, V1
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<p>The main objective of this study is to investigate how innovative satellite Earth observation techniques that allow for the estimation of soil moisture and the mapping of flood extents can help in reducing errors and uncertainties in hydro-meteorological modelling especially in ungauged areas where potentially no or limited runoff records are available. A conceptual hydrological model is loosely coupled with a shallow water model allowing for the simulation of soil moisture and flood extent. Using as forcing of this model rainfall and air temperature time series provided in the globally and freely available ERA5 database it is then possible to carry out long-term simulations of soil moisture, discharge and flood extent. Next, time series of soil moisture and flood extent observations derived from freely available satellite image databases are jointly assimilated into the hydrological model in order to retrieve optimal parameter sets. For this assimilation experiment, we take benefit of recently introduced Particle Filters with tempering that circumvent some of the usual particle filter limitations such as degeneracy and sample impoverishment. As a proof of concept, we set up an identical twin experiment based on synthetically generated observations and we evaluate the performance of the calibrated model.</p> (2022-09-23)
***This entry has been automatically imported via OpenAlex by LIST harvest scripts. Please refer to https://doi.org/10.5194/iahs2022-359 for the original and latest version of the publication*** (2026-07-01)
Subject Astronomy and Astrophysics; Earth and Environmental Sciences; Physics
Keyword Flood myth, Environmental science, Satellite, Data assimilation, Forcing (mathematics), Surface runoff, Water content, Flood forecasting, Meteorology, Hydrology (agriculture), Climatology, Geography, Geology
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