DOI: 10.5194/hess-22-767-2018
Scopus记录号: 2-s2.0-85041198119
论文题名: Passive acoustic measurement of bedload grain size distribution using self-generated noise
作者: Petrut T ; , Geay T ; , Gervaise C ; , Belleudy P ; , Zanker S
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2018
卷: 22, 期: 1 起始页码: 767
结束页码: 787
语种: 英语
Scopus关键词: Acoustic fields
; Acoustic measuring instruments
; Acoustic noise
; Algebra
; Hydrophones
; Least squares approximations
; Linear systems
; Plasma diagnostics
; Rivers
; Sediment transport
; Sedimentation
; Sediments
; Size distribution
; Spectral density
; Spectroscopy
; Grain size distribution
; Least square optimization
; Measurement techniques
; Passive acoustic monitoring
; Power spectrum density
; Regularization methods
; Sediment transport process
; Spatial and temporal resolutions
; Grain size and shape
; acoustic data
; acoustic method
; acoustics
; bedload
; data inversion
; grain size
; hydrophone
; instrumentation
; measurement method
; methodology
; monitoring
; noise
; optimization
; resolution
; river bed
; sampling
; sediment transport
; signal
; size distribution
; transport process
; Auvergne-Rhone-Alpes
; France
; Isere River
英文摘要: 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 process 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 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 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 a linear system of analytic energy spectra weighted by the grain size 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 to 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 ensure high spatial and temporal resolution measurements for sediment transport in rivers. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79411
Appears in Collections: 气候变化事实与影响
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作者单位: Université Grenoble Alpes, Grenoble INP, CNRS, GIPSA-Lab, Grenoble, France; Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France; Électricité de France, DTG division, Grenoble, France; Institut de recherche CHORUS, Phelma Campus, Grenoble, France
Recommended Citation:
Petrut T,, Geay T,, Gervaise C,et al. Passive acoustic measurement of bedload grain size distribution using self-generated noise[J]. Hydrology and Earth System Sciences,2018-01-01,22(1)