Comparison of Water Level Changes in the Mekong River Using Gnss Reflectometry, Satellite Altimetry and in-Situ Tide/River Gauges

This study presents the potential of GNSS Reflectometry (GNSS-R) for the monitoring of water levels in the Mekong river delta (Vietnam). A geodetic GNSS station was installed at the Tran De port, Soc Trang province, over 23-30 August 2016. The method used to retrieve water levels from GNSS-R data is...

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Bibliographic Details
Main Authors: Vu, Phuong-Lan, Frappart, Frederic, Darrozes, Jose, Ha, Minh-Cuong, Dinh, Thi-Bao-Hoa, Ramillien, Guillaume
Format: Conference Proceeding
Language:English
Subjects:
Altimetry
Floods
GNSS-R
in situ gauge
SNR
Tides
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Summary:This study presents the potential of GNSS Reflectometry (GNSS-R) for the monitoring of water levels in the Mekong river delta (Vietnam). A geodetic GNSS station was installed at the Tran De port, Soc Trang province, over 23-30 August 2016. The method used to retrieve water levels from GNSS-R data is based on the Interference Pattern Technic of the Signal-to-Noise Ratio (SNR). To validate our measurements, we used different radar altimetry data from Jason-2, SARAL, Jason-3 and Sentinel-3A missions during the same period for measuring sea surface height (SSH) and in-situ tide gauge station as reference for both tides and floods. The aim of this study is to evaluate the performances GNSS-R, in complex environment, for monitoring at the same time river/tide stages and the possibility to use this technique for calibration/validation of altimetry data. Early results show the good agreement between in -situ gauge and GNSS-R based estimates with correlations which reach ~ 0.85.
ISSN:2153-7003
DOI:10.1109/IGARSS.2018.8518977