Cheng K. C. auteur aut IRD Calmant Stéphane auteur aut IRD Kuo C. Y. auteur aut IRD Tseng H. Z. auteur aut IRD Shum C. K. auteur aut IRD Seyler Frédérique auteur aut IRD Silva da J. S. auteur aut IRD text journalArticle eng text/pdf born digital access This study presents the result of a demonstration of Global Positioning System (GPS) hydrologic studies in a remote area. A GPS campaign was conducted using a GPS-equipped vessel and a GPS buoy to measure water level along Rio Branco, a tributary of the Amazon. The GPS water level data agree well with river gauge data and with ENVISAT radar altimeter measurements. The GPS-estimated river stage gradient of Rio Branco is 5.75 +/- 0.48 cm/km with 99% confidence, which is higher than previous estimates. This result also agrees well with ENVISAT altimetry results. specialized GPS hydrology river stage gradient satellite altimetry 062 126 32 3 267-283 2009 0149-0419 https://www.documentation.ird.fr/hor/PAR00004141 10.1080/01490410903094460 0149-0419 [F B010059105] https://www.documentation.ird.fr/hor/PAR00004141 https://www.documentation.ird.fr/intranet/publi/depot/2013-05-29/010059105.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-11-09 2017-08-23 PAR00004141 fre