Passive Acoustic Measurement of Bedload Grain Size Distribution using the Self-Generated Noise
| Autor: | T. Petrut, T. Geay, C. Gervaise, P. Belleudy, S. Zanker |
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| Přispěvatelé: | GIPSA - Signal Images Physique (GIPSA-SIGMAPHY), Département Images et Signal (GIPSA-DIS), Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Grenoble Images Parole Signal Automatique (GIPSA-lab ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut des Géosciences de l’Environnement (IGE), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Recherche pour le Développement (IRD)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Chaire CHORUS - Fondation Grenoble-INP, Institut Polytechnique de Grenoble - Grenoble Institute of Technology, EDF - Division Technique Générale (DTG), EDF (EDF), Institut de Recherche pour le Développement (IRD)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]) |
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Acoustics 0208 environmental biotechnology Inverse transform sampling 02 engineering and technology 01 natural sciences lcsh:Technology lcsh:TD1-1066 [SPI]Engineering Sciences [physics] Geotechnical engineering lcsh:Environmental technology. Sanitary engineering lcsh:Environmental sciences 0105 earth and related environmental sciences General Environmental Science Bed load lcsh:GE1-350 [PHYS]Physics [physics] Hydrophone lcsh:T lcsh:Geography. Anthropology. Recreation Spectral density 020801 environmental engineering Hydraulic structure lcsh:G 13. Climate action Temporal resolution Particle-size distribution [SDE]Environmental Sciences General Earth and Planetary Sciences Sediment transport Geology |
| Zdroj: | Hydrology and Earth System Sciences Hydrology and Earth System Sciences, European Geosciences Union, 2018, 22 (1), pp.767-787. ⟨10.5194/hess-22-767-2018⟩ Hydrology and Earth System Sciences, Vol 22, Pp 767-787 (2018) Hydrology and Earth System Sciences, 2018, 22 (1), pp.767-787. ⟨10.5194/hess-22-767-2018⟩ |
| ISSN: | 1027-5606 1607-7938 |
| DOI: | 10.5194/hess-2017-171 |
| Popis: | International audience; Monitoring sediment transport processes in rivers is of particular interest to engineers and scientists to assess the stability of rivers and hydraulic structures. Various methods for sediment transport processes description were proposed using conventional or surrogate measurement techniques. This paper addresses the topic of the passive acoustic monitoring of bedload transport in rivers and especially the estimation of the bedload grain size distribution from self-generated noise. It discusses the feasibility of linking the acoustic signal spectrum shape to bedload-grain sizes involved in elastic impacts with 15 the river bed treated as a massive slab. Bedload grain size distribution is estimated by a regularized algebraic inversion scheme fed with the power spectrum density of river noise estimated from one hydrophone. The inversion methodology relies upon a physical model that predicts the acoustic field generated by the collision between rigid bodies. Here we is proposed an analytic model of the acoustic energy spectrum generated by the impacts between a sphere and a slab. The proposed model computes the power spectral density of bedload noise using as a linear system of analytic energy spectra weighted by the grain size 20 distribution. The algebraic system of equations is then solved by least square optimization and solution regularization methods. The result of inversion leads directly to the estimation of the bedload grain size distribution. The inversion method was applied on real acoustic data from passive acoustics experiments realized on the Isère River, in France. The inversion of in situ measured spectra reveals good estimations of grain size distribution, fairly close to what was estimated by physical sampling instruments. These results illustrate the potential of the hydrophone technique to be used as a standalone method that could 25 ensure high spatial and temporal resolution measurements for sediment transport in rivers. |
| Databáze: | OpenAIRE |
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