da Silva J. S. auteur aut IRD Calmant Stéphane auteur aut IRD Seyler Frédérique auteur aut IRD Moreira D. M. auteur aut IRD Oliveira D. auteur aut IRD Monteiro A. auteur aut IRD text journalArticle eng text/pdf born digital access The hydrological observation network in the Amazon basin is made of conventional rainfall and water level stations presently maintained by the Agncia Nacional de Aguas (ANA), the National Agency for Waters. The water level network has long been plagued by difficulties associated with spatial coverage, timely delivery and data errors. Satellite observations are important means for providing hydrologic data with acceptable spatial and temporal resolution, and radar altimeters embarked onboard successive satellites since the early 1970s collect measurements of water level over rivers in a well-defined geodetic reference frame and can be used to address some of these problems. Nowadays, satellite altimetry can be used to collect the time variations of the water levels over many rivers throughout the word, as long as the reach are several hundred meters wide. This ability is particularly interesting in ungauge basins but it can also be used as an independent source of information to cross-check existing gauge series. In the present study, we focus on examples from the Amazon basin where radar altimetry has been used to provide an independent dataset that can be used to support the management of hydrological observation networks by including new data together with conventional field data,. specialized Radar altimetry Hydrological observation networks Water level networks Ungauged water basin, Amazon basin AMAZONE BASSIN 062 126 28 3 587-603 2014 0920-4741 https://www.documentation.ird.fr/hor/fdi:010061813 10.1007/s11269-013-0484-z 0920-4741 [F B010061813] https://www.documentation.ird.fr/hor/fdi:010061813 https://www.documentation.ird.fr/intranet/publi/2014/03/010061813.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-04-02 2017-08-23 fdi:010061813 fre