Using 3D terrestrial laser scanning technique to determine volume changes of a cobble beach

Using 3D terrestrial laser scanning technique to determine volume changes of a cobble beach

Chan, A.

Ngan-Tillard, D.J.M. (mentor)
Khoshelham, K. (mentor)

Civil Engineering and Geosciences

Geotechnology

Geo-Engineering

2010-07-14

The use of cobbles as a dynamic revetment is a recent development in coastal protection. Cobbles are placed along the beach and they form a dynamic equilibrium with the waves, thus dissipating the energies from the wave and protecting the soft, native material from eroding. In order to optimize the design and increase the durability of this method, it is important to obtain information on the long term behaviour of the cobble beaches in a reliable way. In this research the efficiency of using terrestrial laser scanning (TLS) to acquire a detailed model of the cobble beach and extracting information from it will be explored. Using a 3D terrestrial laser scanner, a dense point cloud of the cobble beach can be generated. Then through scan registration, data processing (e.g. removal of outliers) and surface reconstruction a solid model will be created. The volume of the solid can be calculated and compared to the volume of a subsequent scan to identify any changes. Finally the validity of the model will be verified by comparing roughness profiles obtained from a laser sensor and the profile obtained by cutting the surface of the model.

terrestrial laser scanner
cobble beach
laser scanning

http://resolver.tudelft.nl/uuid:49218367-0a1c-43f2-80a2-b08ef76b8099

Student theses

master thesis

(c) 2010 Chan, A.