Using CYGNSS to Monitor Flood in Southern China
This paper aims to develop an effective method to monitor floods globally using the GNSS-R technique and to apply the method to monitor the current flood in southern China using the CYGNSS data. Special focus is on choosing the site and time specific thresholds of the surface reflectivity to detect floods. The CYGNSS data used in this study were from level 1, version 2.1, available via https://podaac.jpl.nasa.gov/. The Poyang Lake Basin is chosen to test our algorithm. The surface reflectance before and after the flood are analyzed. The potential of using GNSS-R technique to monitor the water level dynamics during floods are also examined.
Keywords: GNSS-R; CYGNSS; Flood Monitoring; Surface Reflectance; Threshold.