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Modelling pollution transport dynamics and mixing in square manhole overflows
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Jimoh, Modupe and Abolfathi, Soroush (2022) Modelling pollution transport dynamics and mixing in square manhole overflows. Journal of Water Process Engineering, 45 . 102491. doi:10.1016/j.jwpe.2021.102491 ISSN 2214-7144.
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WRAP-Modelling-pollution-transport-dynamics-mixing-square-manhole-2021.pdf - Accepted Version - Requires a PDF viewer. Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0. Download (823Kb) | Preview |
Official URL: https://doi.org/10.1016/j.jwpe.2021.102491
Abstract
Detailed knowledge of the dynamic interactions between incoming sewerage and an overflowing manhole, and the resulting pollutant concentrations from manhole flooding, are critical for robust design and operations of wastewater infrastructures, especially during extreme climatic events. This study investigates the mixing and dispersion of solute in square manhole overflow using laboratory tracer experiment and analytical modelling. Tests are conducted with three flow rates to examine mixing characteristics over a wide range of operational conditions. Two overflowing scenarios including blocked pipe exit, and overflow in combination with pipe exit are studied. The Residence Time Distributions (RTD) and longitudinal dispersion coefficients are determined to understand the characteristics of pollutant transport. The analysis of the fluorometric tracer data show the appropriateness and robustness of the deconvolution model adopted in this study for determining the mixing characteristics and RTDs (R2 > 0.95). Similarly, the Taylor's model was shown to be capable of predicting advective and dispersive mixing mechanisms within the manhole, for the range of flow conditions tested in this study. New empirical predictive formulae are derived to characterize the pollutant mixing in square manholes under different operational conditions.
| Item Type: | Journal Article | ||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TD Environmental technology. Sanitary engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
| Library of Congress Subject Headings (LCSH): | Manholes, Combined sewer overflows , Pollution , Flood control , Sewage , Urban runoff , Urban runoff -- Management , Urban runoff -- Mathematical models, Sewage disposal plants -- Design and construction -- Mathematical models | ||||||||
| Journal or Publication Title: | Journal of Water Process Engineering | ||||||||
| Publisher: | Elsevier | ||||||||
| ISSN: | 2214-7144 | ||||||||
| Official Date: | 1 February 2022 | ||||||||
| Dates: |
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| Volume: | 45 | ||||||||
| Article Number: | 102491 | ||||||||
| DOI: | 10.1016/j.jwpe.2021.102491 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 15 December 2021 | ||||||||
| Date of first compliant Open Access: | 13 December 2022 |
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