Morphological changes along a dike landside slope sampled by 4D high resolution terrestrial laser scanning

Mónica Herrero-Huerta, Roderik Lindenbergh, Luc Ponsioen, Myron Van Damme

Research output: Contribution to journalConference articleScientificpeer-review

1 Citation (Scopus)
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Abstract

Emergence of light detection and ranging (LiDAR) technology provides new tools for geomorphologic studies improving spatial and temporal resolution of data sampling hydrogeological instability phenomena. Specifically, terrestrial laser scanning (TLS) collects high resolution 3D point clouds allowing more accurate monitoring of erosion rates and processes, and thus, quantify the geomorphologic change on vertical landforms like dike landside slopes. Even so, TLS captures observations rapidly and automatically but unselectively. In this research, we demonstrate the potential of TLS for morphological change detection, profile creation and time series analysis in an emergency simulation for characterizing and monitoring slope movements in a dike. The experiment was performed near Schellebelle (Belgium) in November 2015, using a Leica Scan Station C10. Wave overtopping and overflow over a dike were simulated whereby the loading conditions were incrementally increased and 14 successful scans were performed. The aim of the present study is to analyse short-Term morphological dynamic processes and the spatial distribution of erosion and deposition areas along a dike landside slope. As a result, we are able to quantify the eroded material coming from the impact on the terrain induced by wave overtopping which caused the dike failure in a few minutes in normal storm scenarios (Q = 25 l/s/m) as 1.24 m3. As this shows that the amount of erosion is measurable using close range techniques; the amount and rate of erosion could be monitored to predict dike collapse in emergency situation. The results confirm the feasibility of the proposed methodology, providing scalability to a comprehensive analysis over a large extension of a dike (tens of meters).

Original languageEnglish
Pages (from-to)227-232
Number of pages6
JournalInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Volume41
DOIs
Publication statusPublished - 2016
EventXXIII ISPRS Congress: From human history to the future with spatial information - Prague, Czech Republic
Duration: 12 Jul 201619 Jul 2016
Conference number: 23
http://www.isprs2016-prague.com/

Keywords

  • Dike landside slope
  • Erosion and deposition
  • Hydrogeological models
  • LiDAR
  • Morphological changes
  • Terrestrial laser scanner

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