Multicamera, Multimethod Measurements for Hydromorphologic Laboratory Experiments
The realization of hydromorphologic laboratory experiments on the propagation of aggrading or degrading sediment fronts requires simultaneous measurements of the sediment feeding rate, the profile of the free surface, and the flume bed elevation. In this study, five action cameras and different imag...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-05-01
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| Series: | Geosciences |
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| Online Access: | http://www.mdpi.com/2076-3263/8/5/172 |
| _version_ | 1828923794699321344 |
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| author | Alessio Radice Barbara Zanchi |
| author_facet | Alessio Radice Barbara Zanchi |
| author_sort | Alessio Radice |
| collection | DOAJ |
| description | The realization of hydromorphologic laboratory experiments on the propagation of aggrading or degrading sediment fronts requires simultaneous measurements of the sediment feeding rate, the profile of the free surface, and the flume bed elevation. In this study, five action cameras and different image-processing techniques were employed to measure all the needed quantities automatically and with adequate temporal resolution. The measurement of the sediment feeding rate was determined by particle image velocimetry as a surrogate, correlated quantity: the surface velocity of the sediment flow along a vibrating channel was used as an upstream feeder. The profile of the free surface was measured by shooting an array of piezometers connected to the flume. Each piezometer pipe contained a buoyant black sphere that could be recognized by using tools for particle identification, thus determining the elevation of the free surface above the piezometric probe. Finally, the bed profile along the flume was measured at any instant by edge detection, locating the transition from a water layer to a sediment layer in images taken from the side of the flume. The paper describes the instrumentation and the methods, finally presenting the results obtained from a prototypal experiment. Potentialities and limitations of the proposed methods are discussed, together with some prospects on future use in systematic experimental campaigns. |
| first_indexed | 2024-12-13T22:45:40Z |
| format | Article |
| id | doaj.art-a7f46d06494b480bbe01858fd36a8751 |
| institution | Directory Open Access Journal |
| issn | 2076-3263 |
| language | English |
| last_indexed | 2024-12-13T22:45:40Z |
| publishDate | 2018-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geosciences |
| spelling | doaj.art-a7f46d06494b480bbe01858fd36a87512022-12-21T23:28:45ZengMDPI AGGeosciences2076-32632018-05-018517210.3390/geosciences8050172geosciences8050172Multicamera, Multimethod Measurements for Hydromorphologic Laboratory ExperimentsAlessio Radice0Barbara Zanchi1Department of Civil and Environmental Engineering, Politecnico di Milano, Milan 20133, ItalyDepartment of Civil and Environmental Engineering, Politecnico di Milano, Milan 20133, ItalyThe realization of hydromorphologic laboratory experiments on the propagation of aggrading or degrading sediment fronts requires simultaneous measurements of the sediment feeding rate, the profile of the free surface, and the flume bed elevation. In this study, five action cameras and different image-processing techniques were employed to measure all the needed quantities automatically and with adequate temporal resolution. The measurement of the sediment feeding rate was determined by particle image velocimetry as a surrogate, correlated quantity: the surface velocity of the sediment flow along a vibrating channel was used as an upstream feeder. The profile of the free surface was measured by shooting an array of piezometers connected to the flume. Each piezometer pipe contained a buoyant black sphere that could be recognized by using tools for particle identification, thus determining the elevation of the free surface above the piezometric probe. Finally, the bed profile along the flume was measured at any instant by edge detection, locating the transition from a water layer to a sediment layer in images taken from the side of the flume. The paper describes the instrumentation and the methods, finally presenting the results obtained from a prototypal experiment. Potentialities and limitations of the proposed methods are discussed, together with some prospects on future use in systematic experimental campaigns.http://www.mdpi.com/2076-3263/8/5/172image processingaction cameralens distortionimage calibrationblob identificationparticle image velocimetryedge detection |
| spellingShingle | Alessio Radice Barbara Zanchi Multicamera, Multimethod Measurements for Hydromorphologic Laboratory Experiments Geosciences image processing action camera lens distortion image calibration blob identification particle image velocimetry edge detection |
| title | Multicamera, Multimethod Measurements for Hydromorphologic Laboratory Experiments |
| title_full | Multicamera, Multimethod Measurements for Hydromorphologic Laboratory Experiments |
| title_fullStr | Multicamera, Multimethod Measurements for Hydromorphologic Laboratory Experiments |
| title_full_unstemmed | Multicamera, Multimethod Measurements for Hydromorphologic Laboratory Experiments |
| title_short | Multicamera, Multimethod Measurements for Hydromorphologic Laboratory Experiments |
| title_sort | multicamera multimethod measurements for hydromorphologic laboratory experiments |
| topic | image processing action camera lens distortion image calibration blob identification particle image velocimetry edge detection |
| url | http://www.mdpi.com/2076-3263/8/5/172 |
| work_keys_str_mv | AT alessioradice multicameramultimethodmeasurementsforhydromorphologiclaboratoryexperiments AT barbarazanchi multicameramultimethodmeasurementsforhydromorphologiclaboratoryexperiments |