Measuring and Modeling the Effect of Surface Moisture on the Spectral Reflectance of Coastal Beach Sand
Figure 10
Example gravimetric moisture content (in %) map, estimated from the reflectance collected with a RIEGL VZ-400 3D terrestrial laser scanner at Egmond aan Zee, The Netherlands, from the upper dry beach (cross-shore distance m) to the water line (
to 10 m) [62].
The local co-ordinates are positive in the seaward direction and to the south. The scanner was located at m. The slightly drier sand immediately around the scanner position is an artifact of the conversion from intensity to reflectance; close to the scanner, as also noted by [39], the imposed
correction does not apply. The narrow bands with apparent lower moisture content (e.g. at alongshore
distances
to
m and
m) correspond to car tracks.