Fig. 1. Geographical conditions and TLS points cloud of the field area

Fig. 2. Schematic diagram of TLS

Fig. 3. Frequency distribution of grain size for surface sediments in the tidal flat

Fig. 4. Schematic figure showing how the correction of incident angle experiment doing

Fig. 5. Relationship between incidence angle, distance effect and intensity

Fig. 6. Relationship between PRR and corrected intensity

Fig. 7. Relationship between PRR and corrected intensity

Fig. 8. Relationships of sediment elevation surface moisture, intensity and distance

Fig. 9. Comparison between indoor and outdoor data of corrected intensity and sediment moisture