MORPHOLOGICAL CHANGES ALONG A DIKE LANDSIDE SLOPE SAMPLED BY 4D HIGH RESOLUTION TERRESTRIAL LASER SCANNING
Autor: | Luc Ponsioen, Roderik Lindenbergh, Myron van Damme, Mónica Herrero-Huertaa |
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Jazyk: | angličtina |
Rok vydání: | 2018 |
Předmět: |
lcsh:Applied optics. Photonics
0301 basic medicine Dike LiDAR 010504 meteorology & atmospheric sciences 0211 other engineering and technologies Hydrogeological models Terrain 02 engineering and technology 01 natural sciences lcsh:Technology 03 medical and health sciences Geomorphology 021101 geological & geomatics engineering 0105 earth and related environmental sciences geography geography.geographical_feature_category Hydrogeology Landform lcsh:T lcsh:TA1501-1820 04 agricultural and veterinary sciences Dike landside slope Morphological changes Lidar 030104 developmental biology lcsh:TA1-2040 Temporal resolution Erosion 040103 agronomy & agriculture Terrestrial laser scanner 0401 agriculture forestry and fisheries Erosion and deposition lcsh:Engineering (General). Civil engineering (General) Change detection Geology |
Zdroj: | International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 41 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLI-B3, Pp 227-232 (2016) |
ISSN: | 2194-9034 1682-1750 |
Popis: | 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). |
Databáze: | OpenAIRE |
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