Dune Topographic Changes from Repeat Terrestrial Laser Scans in the Freeport, Texas

Terrestrial Laser Scans by VZ2000 scanner integrated with R10 GPS ensure the precision as well as accuracy. The workflow for DEM can effectively facilitate change detection. According to the comparisons of profiles and dune features such as shoreline, volume, and dune ridge, the dune and beach at Bryan beach are retreating. However, the rate varies with the distance to Brazos River and the sea. The closer, the severer the impact to the change to dune and shoreline. It is comparable with 4.5m/y (from Bureau of Economic Geology), but LiDAR data provide much details in 3 dimensions.