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Geosciences 2018, 8(7), 243; https://doi.org/10.3390/geosciences8070243

PHOTOSED—PHOTOgrammetric Sediment Erosion Detection

Institute for Modelling Hydraulic and Environmental Systems, University of Stuttgart, Pfaffenwaldring 61, 70569 Stuttgart, Germany
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Received: 2 June 2018 / Revised: 28 June 2018 / Accepted: 29 June 2018 / Published: 30 June 2018
(This article belongs to the Special Issue Laboratory Geosciences: Modelling Surface Processes)
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Abstract

This work presents a novel high-resolution photogrammetric measuring technique (PHOTOSED) to study in detail the erosion behavior of cohesive sediments, or cohesive/non-cohesive sediment mixtures. PHOTOSED uses a semiconductor laser to project a pseudo-random pattern of light points on a sediment surface and applies the Dense Optical Flow (DOF) algorithm to measure the erosion volume based on displacements of the projected light points during the sediment erosion process. Based on intensive calibration and verification experiments, the accuracy and applicability of the method has been validated for a wide range of erosion volumes, encompassing several orders of magnitude, which is required for investigations of natural sediment mixtures. The high spatial resolution of PHOTOSED is especially designed to detect the substantial variability of erosion rates during exemplary erosion experiments, which allows for further in-depth investigations of the erosion process of cohesive sediments and cohesive/non-cohesive sediment mixtures. View Full-Text
Keywords: cohesive sediments; cohesive/non-cohesive sediment mixtures; erosion behavior; high-spatial resolution measurements; photogrammetric measurements cohesive sediments; cohesive/non-cohesive sediment mixtures; erosion behavior; high-spatial resolution measurements; photogrammetric measurements
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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MDPI and ACS Style

Noack, M.; Schmid, G.; Beckers, F.; Haun, S.; Wieprecht, S. PHOTOSED—PHOTOgrammetric Sediment Erosion Detection. Geosciences 2018, 8, 243.

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