Ermilov, Alexander Anatol and Fleit, Gábor and Conevski, Slaven and Guerrero, Massimo and Baranya, Sándor (2022) Bedload transport analysis using image processing techniques. ACTA GEOPHYSICA. ISSN 1895-6572
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Abstract
Bedload transport is an important factor to describe the hydromorphological processes of fluvial systems. However, conventional bedload sampling methods have large uncertainty, making it harder to understand this notoriously complex phenomenon. In this study, a novel, image-based approach, the Video-based Bedload Tracker (VBT), is implemented to quantify gravel bedload transport by combining two different techniques: Statistical Background Model and Large-Scale Particle Image Velocimetry. For testing purposes, we use underwater videos, captured in a laboratory flume, with future field adaptation as an overall goal. VBT offers a full statistics of the individual velocity and grainsize data for the moving particles. The paper introduces the testing of the method which requires minimal preprocessing (a simple and quick 2D Gaussian filter) to retrieve and calculate bedload transport rate. A detailed sensitivity analysis is also carried out to introduce the parameters of the method, during which it was found that by simply relying on literature and the visual evaluation of the resulting segmented videos, it is simple to set them to the correct values. Practical aspects of the applicability of VBT in the field are also discussed and a statistical filter, accounting for the suspended sediment and air bubbles, is provided.
| Item Type: | Article |
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| Additional Information: | Department of Hydraulic and Water Resources Engineering, Faculty of Civil Engineering, Budapest University of Technology and Economics, Budapest, Hungary Water Management Research Group of the Eötvös Lóránd Research Network, Budapest, Hungary Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, Trondheim, Norway Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Bologna, Italy Export Date: 27 May 2022 Correspondence Address: Ermilov, A.A.; Department of Hydraulic and Water Resources Engineering, Hungary; email: ermilov.alexander@emk.bme.hu Funding details: BME-NVA-02 Funding details: Hungarian Scientific Research Fund, OTKA, FK 128429 Funding details: Magyar Tudományos Akadémia, MTA Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding details: Innovációs és Technológiai Minisztérium Funding text 1: Open access funding provided by Budapest University of Technology and Economics. The first author acknowledges the support of the ÚNKP-20–3 New National Excellence Program of the Ministry for Innovation and Technology, and the National Research, Development and Innovation Fund, Hungary. The second author acknowledges the support of the ÚNKP-21–4 New National Excellence Program of the Ministry for Innovation and Technology from the source of the National Research, Development and Innovation Fund. The fifth author acknowledges the support of Bolyai János fellowship of the Hungarian Academy of Sciences. The research reported in this paper and carried out at BME has been supported by the NRDI Fund TKP2021 based on the charter of bolster issued by the NRDI Office under the auspices of the Ministry for Innovation and Technology (project id: BME-NVA-02). The authors acknowledge the funding of the OTKA FK 128429 Grant. |
| Subjects: | Q Science / természettudomány > QE Geology / földtudományok > QE01 Geophysics / geofizika |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 28 Sep 2022 05:51 |
| Last Modified: | 28 Sep 2022 05:51 |
| URI: | http://real.mtak.hu/id/eprint/150253 |
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