Rock slopes and gravel beaches under wave attack, PhD thesis, Delft Hydrulics Laboratory, Emmeloord, The Netherlands. CHL-ERDC, ed., 'Coastal engineering manual', Vicksburg,MS, pp. Monitoring and maintenance of breakwaters which protect port entrances, in '28th Annual Southern African Transport Conference', number July, pp. URL: pxpriegldownloads/Thies Thomas 2011, A Vessel-Based Mobile Mapping System Master Thesis HafenCity University, Hamburg Germany part1.pdf A Vessel-Based mobile mapping system from sensor integration to multipurpose products, PhD thesis, University Hamburg, Germany. '3D Terrestrial Laser Scanner, RIEGL VZ-400 / RIEGL VZ-1000'. 'Correlation between model and prototype damage of dolos breakwater armouring', Coastal Engineering 2000 pp. Digital image technology as a measurement tool in physical models, in 'International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science', pp. Advantages are that they can be fabricated at remote sites and deployed in deep water or where foundations preclude normal construction. They have numerous advantages and some disadvantages. Physical Modelling of Dolos Breakwaters: The Coega Results and Historical Perspective, in 'Coastal Engineering 2000', pp. Floating breakwaters are being used for the protection of small boat harbors and as shore protection devices at various locations throughout the world. 'Empirical formula for breakage of dolosse and tetrapods', Coastal Engineering 40(3), 183-206. 82-3.īurcharth, H., D'Angremond, K., van der Meer, J. Thus, this comparison is aimed towards the development of the 3D eroded volume method (3D method).īroderick, L., 1982. The objective of this study is to test a 3D analysis method by evaluating the accuracy of using the LIDAR and multi-beam echo sounder data to quantify damage to dolos breakwaters above and below the water surface (including the inter-tidal zone). Another difficulty is taking underwater images near the breakwater due to poor visibility and wave breaking. This is difficult to achieve as it is not always possible to get the helicopter exactly in the same position on every survey and highly dependent on the skill of the helicopter pilot. The photographs are then visually compared with the previous inspection photographs to identify changes. Breakwaters are systematically divided into inspection stations and photographs are taken to inspect and assess the damage. Traditionally, breakwater inspection has been done using aerial photographs and underwater imaging to accomplish these investigations. One of the important aspects is calculating the severity of damage to breakwaters. In order to extend the design life of breakwaters, regular damage investigations and timeous repairs are required.
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