Physically based probabilistic analysis of sediment deposition in open channel flow

Jungsun Oh, Jung-il Choi, Sung-Uk Choi, Christina W. Tsai

Research output: Contribution to journalArticle

Abstract

This paper proposes a physically based probabilistic model for predicting the longitudinal distance of sediment deposition in an open channel flow. Numerical simulations were performed using a stochastic particle-tracking model to obtain the probability density functions (PDFs) of the longitudinal deposition spots. A skewness-kurtosis analysis and probability-probability plot confirmed that the PDF of the deposition locations had a lognormal type distribution. The distribution parameters, which include the mean and variance, were examined to analyze the effect of two particle-related factors, namely, the particle size and initial release point, on the PDF of the deposition locations. Smaller particles and a higher release point were found to produce, on average, longer travel distances to the deposition location and a more-dispersive distribution of the locations. The physical relationships between the distribution parameters of the PDF and the particle-related factors were considered for better prediction of the distribution parameters. The findings of the present study confirm the robustness and accuracy of a probabilistic model parameterized by physically based regression for predicting the spatial patterns of sediment deposition locations.

Original languageEnglish
Article number04016106
JournalJournal of Hydraulic Engineering
Volume143
Issue number5
DOIs
Publication statusPublished - 2017 May 1

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Open channel flow
open channel flow
Sediments
probability density function
Probability density function
sediment
skewness
analysis
Particle size
particle size
distribution
particle
Computer simulation
prediction
simulation
parameter

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Water Science and Technology
  • Mechanical Engineering

Cite this

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Physically based probabilistic analysis of sediment deposition in open channel flow. / Oh, Jungsun; Choi, Jung-il; Choi, Sung-Uk; Tsai, Christina W.

In: Journal of Hydraulic Engineering, Vol. 143, No. 5, 04016106, 01.05.2017.

Research output: Contribution to journalArticle

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