Change analysis of laser scans of laboratory rock slopes subject to wave attack testing

Y. Shen, R. Lindenbergh, B. Hofland, R. Kramer

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

1 Citation (Scopus)
34 Downloads (Pure)

Abstract

For better understanding how coastal structures with gentle slopes behave during high energy events, a wave attack experiment representing a storm of 3000 waves was performed in a flume facility. Two setups with different steepness of slope were compared under the same conditions. In order to quantify changes in the rock slopes after the wave attack, a terrestrial laser scanner was used to obtain 3D coordinates of the rock surface before and after each experiment. Next, through a series of processing steps, the point clouds were converted to a suitable 2D raster for change analysis. This allowed to estimate detailed and quantitative change information. The results indicate that the area around the artificial coast line, defined as the intersection between sloped surface and wave surface, is most strongly affected by wave attacks. As the distances from the sloped surface to the waves are shorter, changes for the mildly sloped surface, slope 1 (1: 10), are distributed over a larger area compared to the changes for the more steeply sloped surface, slope 2 (1: 5). The results of this experiment show that terrestrial laser scanning is an effective and feasible method for change analysis of rock slopes in a laboratory setting. Most striking results from a process point of view is that the transport direction of the rocks change between the two different slopes: from seaward transport for the steeper slope to landward transport for the milder slope.

Original languageEnglish
Title of host publicationISPRS Geospatial Week 2017, Wuhan, China
Pages139-147
Number of pages9
Volume4
DOIs
Publication statusPublished - 12 Sep 2017
EventISPRS Geospatial Week 2017 - Wuhan, China
Duration: 18 Sep 201722 Sep 2017
http://www.isprs.org/documents/geoweek.aspx

Publication series

NameISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
VolumeIV-2/W4

Conference

ConferenceISPRS Geospatial Week 2017
CountryChina
CityWuhan
Period18/09/1722/09/17
Internet address

Keywords

  • Breakwater
  • Change Analysis
  • Coastal Engineering
  • TLS
  • Water Flume
  • Wave Attack

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