%0 Journal Article
%9 ACL : Articles dans des revues à comité de lecture répertoriées dans les bases internationales
%A Cheng, K. C.
%A Calmant, Stéphane
%A Kuo, C. Y.
%A Tseng, H. Z.
%A Shum, C. K.
%A Seyler, Frédérique
%A Silva da, J. S.
%T Branco river stage gradient determination and Amazon hydrologic studies using GPS water level measurements
%D 2009
%L PAR00004141
%J Marine Geodesy
%K GPS hydrology ; river stage gradient ; satellite altimetry
%M ISI:000270492900002
%N 3
%P 267-283
%R 10.1080/01490410903094460
%U http://www.documentation.ird.fr/hor/PAR00004141
%V 32
%W Horizon (IRD)
%X 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.