Figure 1 The SAR image in the left plot shows the geographic extent of the study domain. The red boundary in the left plot indicates Pee Dee River basin and the shaded portion inside the basin boundary indicates the study area (aircraft flight domain). Hydrograph in the left plot shows the discharge at gauge B and red dots in it indicate the dates used in the analysis. The right plot displays a LiDAR-based DEM of the study area along with locations of USGS gauge points and approximate distance from the river mouth.