Automatic Detection of Inland Water Bodies along Altimetry Tracks for Estimating Surface Water Storage Variations in the Congo Basin
| hal.structure.identifier | Laboratoire d'études en Géophysique et océanographie spatiales [LEGOS] | |
| hal.structure.identifier | Interactions Sol Plante Atmosphère [UMR ISPA] | |
| dc.contributor.author | FRAPPART, Frédéric | |
| hal.structure.identifier | Laboratoire d'études en Géophysique et océanographie spatiales [LEGOS] | |
| dc.contributor.author | ZEIGER, Pierre | |
| hal.structure.identifier | Forêts et Sociétés [UPR Forêts et Sociétés] | |
| hal.structure.identifier | Département Environnements et Sociétés [Cirad-ES] | |
| dc.contributor.author | BETBEDER, Julie | |
| hal.structure.identifier | Forêts et Sociétés [UPR Forêts et Sociétés] | |
| hal.structure.identifier | Département Environnements et Sociétés [Cirad-ES] | |
| dc.contributor.author | GOND, Valéry | |
| hal.structure.identifier | Institut National de l'Information Géographique et Forestière [IGN] [IGN] | |
| dc.contributor.author | BELLOT, Régis | |
| hal.structure.identifier | Territoires, Environnement, Télédétection et Information Spatiale [UMR TETIS] | |
| dc.contributor.author | BAGHDADI, Nicolas | |
| hal.structure.identifier | Laboratoire d'études en Géophysique et océanographie spatiales [LEGOS] | |
| dc.contributor.author | BLAREL, Fabien | |
| hal.structure.identifier | Géosciences Environnement Toulouse [GET] | |
| dc.contributor.author | DARROZES, José | |
| hal.structure.identifier | Géosciences Environnement Toulouse [GET] | |
| dc.contributor.author | BOURREL, Luc | |
| hal.structure.identifier | UMR 228 Espace-Dev, Espace pour le développement | |
| dc.contributor.author | SEYLER, F. | |
| dc.date.accessioned | 2024-04-08T11:50:20Z | |
| dc.date.available | 2024-04-08T11:50:20Z | |
| dc.date.issued | 2021-09-23 | |
| dc.identifier.issn | 2072-4292 | |
| dc.identifier.uri | https://oskar-bordeaux.fr/handle/20.500.12278/195382 | |
| dc.description.abstractEn | Surface water storage in floodplains and wetlands is poorly known from regional to global scales, in spite of its importance in the hydrological and the carbon balances, as the wet areas are an important water compartment which delays water transfer, modifies the sediment transport through sedimentation and erosion processes, and are a source for greenhouse gases. Remote sensing is a powerful tool for monitoring temporal variations in both the extent, level, and volume, of water using the synergy between satellite images and radar altimetry. Estimating water levels over flooded area using radar altimetry observation is difficult. In this study, an unsupervised classification approach is applied on the radar altimetry backscattering coefficients to discriminate between flooded and non-flooded areas in the Cuvette Centrale of Congo. Good detection of water (open water, permanent and seasonal inundation) is above 0.9 using radar altimetry backscattering from ENVISAT and Jason-2. Based on these results, the time series of water levels were automatically produced. They exhibit temporal variations in good agreement with the hydrological regime of the Cuvette Centrale. Comparisons against a manually generated time series of water levels from the same missions at the same locations show a very good agreement between the two processes (i.e., RMSE _ 0.25 m in more than 80%/90% of the cases and R _ 0.95 in more than 95%/75% of the cases for ENVISAT and Jason-2, respectively). The use of the time series of water levels over rivers and wetlands improves the spatial pattern of the annual amplitude of water storage in the Cuvette Centrale. It also leads to a decrease by a factor of four for the surface water estimates in this area, compared with a case where only time series over rivers are considered. | |
| dc.language.iso | en | |
| dc.publisher | MDPI | |
| dc.rights.uri | http://creativecommons.org/licenses/by/ | |
| dc.subject.en | surface water storage | |
| dc.subject.en | Congo | |
| dc.title.en | Automatic Detection of Inland Water Bodies along Altimetry Tracks for Estimating Surface Water Storage Variations in the Congo Basin | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.3390/rs13193804 | |
| dc.subject.hal | Sciences de l'environnement | |
| bordeaux.journal | Remote Sensing | |
| bordeaux.page | 3804 | |
| bordeaux.volume | 13 | |
| bordeaux.hal.laboratories | Interactions Soil Plant Atmosphere (ISPA) - UMR 1391 | * |
| bordeaux.issue | 19 | |
| bordeaux.institution | Bordeaux Sciences Agro | |
| bordeaux.institution | INRAE | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-03352440 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-03352440v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Remote%20Sensing&rft.date=2021-09-23&rft.volume=13&rft.issue=19&rft.spage=3804&rft.epage=3804&rft.eissn=2072-4292&rft.issn=2072-4292&rft.au=FRAPPART,%20Fr%C3%A9d%C3%A9ric&ZEIGER,%20Pierre&BETBEDER,%20Julie&GOND,%20Val%C3%A9ry&BELLOT,%20R%C3%A9gis&rft.genre=article |
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