A heuristic probabilistic approach to estimating size-dependent mobility of nonuniform sediment.
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| Title: | A heuristic probabilistic approach to estimating size-dependent mobility of nonuniform sediment. |
|---|---|
| Authors: | Woldegiorgis, Befekadu Taddesse1, Bauwens, Willy1, Van Griensven, Ann1,2, Wu, Fu-Chun3 |
| Source: | Stochastic Environmental Research & Risk Assessment. Jun2018, Vol. 32 Issue 6, p1771-1782. 12p. |
| Subjects: | Heuristic, Probabilistic inference, Non-uniform flows (Fluid dynamics), Sediments, Particle size distribution, Atmospheric circulation |
| Abstract: | This paper presents a heuristic probabilistic approach to estimating the size-dependent mobilities of nonuniform sediment based on the pre- and post-entrainment particle size distributions (PSDs), assuming that the PSDs are lognormally distributed. The approach fits a lognormal probability density function to the pre-entrainment PSD of bed sediment and uses the threshold particle size of incipient motion and the concept of sediment mixture to estimate the PSDs of the entrained sediment and post-entrainment bed sediment. The new approach is simple in physical sense and significantly reduces the complexity and computation time and resource required by detailed sediment mobility models. It is calibrated and validated with laboratory and field data by comparing to the size-dependent mobilities predicted with the existing empirical lognormal cumulative distribution function approach. The novel features of the current approach are: (1) separating the entrained and non-entrained sediments by a threshold particle size, which is a modified critical particle size of incipient motion by accounting for the mixed-size effects, and (2) using the mixture-based pre- and post-entrainment PSDs to provide a continuous estimate of the size-dependent sediment mobility. [ABSTRACT FROM AUTHOR] |
| Copyright of Stochastic Environmental Research & Risk Assessment is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 129703731 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A heuristic probabilistic approach to estimating size-dependent mobility of nonuniform sediment. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Woldegiorgis%2C+Befekadu+Taddesse%22">Woldegiorgis, Befekadu Taddesse</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bauwens%2C+Willy%22">Bauwens, Willy</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Van+Griensven%2C+Ann%22">Van Griensven, Ann</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Wu%2C+Fu-Chun%22">Wu, Fu-Chun</searchLink><relatesTo>3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Stochastic+Environmental+Research+%26+Risk+Assessment%22">Stochastic Environmental Research & Risk Assessment</searchLink>. Jun2018, Vol. 32 Issue 6, p1771-1782. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Heuristic%22">Heuristic</searchLink><br /><searchLink fieldCode="DE" term="%22Probabilistic+inference%22">Probabilistic inference</searchLink><br /><searchLink fieldCode="DE" term="%22Non-uniform+flows+%28Fluid+dynamics%29%22">Non-uniform flows (Fluid dynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22Sediments%22">Sediments</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Atmospheric+circulation%22">Atmospheric circulation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This paper presents a heuristic probabilistic approach to estimating the size-dependent mobilities of nonuniform sediment based on the pre- and post-entrainment particle size distributions (PSDs), assuming that the PSDs are lognormally distributed. The approach fits a lognormal probability density function to the pre-entrainment PSD of bed sediment and uses the threshold particle size of incipient motion and the concept of sediment mixture to estimate the PSDs of the entrained sediment and post-entrainment bed sediment. The new approach is simple in physical sense and significantly reduces the complexity and computation time and resource required by detailed sediment mobility models. It is calibrated and validated with laboratory and field data by comparing to the size-dependent mobilities predicted with the existing empirical lognormal cumulative distribution function approach. The novel features of the current approach are: (1) separating the entrained and non-entrained sediments by a threshold particle size, which is a modified critical particle size of incipient motion by accounting for the mixed-size effects, and (2) using the mixture-based pre- and post-entrainment PSDs to provide a continuous estimate of the size-dependent sediment mobility. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Stochastic Environmental Research & Risk Assessment is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00477-017-1471-3 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 1771 Subjects: – SubjectFull: Heuristic Type: general – SubjectFull: Probabilistic inference Type: general – SubjectFull: Non-uniform flows (Fluid dynamics) Type: general – SubjectFull: Sediments Type: general – SubjectFull: Particle size distribution Type: general – SubjectFull: Atmospheric circulation Type: general Titles: – TitleFull: A heuristic probabilistic approach to estimating size-dependent mobility of nonuniform sediment. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Woldegiorgis, Befekadu Taddesse – PersonEntity: Name: NameFull: Bauwens, Willy – PersonEntity: Name: NameFull: Van Griensven, Ann – PersonEntity: Name: NameFull: Wu, Fu-Chun IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2018 Type: published Y: 2018 Identifiers: – Type: issn-print Value: 14363240 Numbering: – Type: volume Value: 32 – Type: issue Value: 6 Titles: – TitleFull: Stochastic Environmental Research & Risk Assessment Type: main |
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