Numerical Modeling of Instantaneous Spills in One-dimensional River Systems
Modeling the fate and transport of spills in rivers is critical for risk assessment and instantaneous spill response. In this research, a one-dimensional model for instantaneous spills in river systems was built by solving the advection-dispersion equation (ADE) numerically along with the shallow wa...
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Technoscience Publications
2024-12-01
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| Series: | Nature Environment and Pollution Technology |
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| Online Access: | https://neptjournal.com/upload-images/(20)D-1640.pdf |
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| author | Fatima M. A. Al-khafaji and Hussein A. M. Al-Zubaidi |
| author_facet | Fatima M. A. Al-khafaji and Hussein A. M. Al-Zubaidi |
| author_sort | Fatima M. A. Al-khafaji and Hussein A. M. Al-Zubaidi |
| collection | DOAJ |
| description | Modeling the fate and transport of spills in rivers is critical for risk assessment and instantaneous spill response. In this research, a one-dimensional model for instantaneous spills in river systems was built by solving the advection-dispersion equation (ADE) numerically along with the shallow water equations (SWEs) within the MATLAB environment. To run the model, the Ohio River’s well-known accidental spill in 1988 was used as a field case study. The verification process revealed the model’s robustness with very low statistic errors. The mean absolute error (MAE) and root mean squared error (RMSE) relative to the absorbed record were 0.0626 ppm and 0.2255 ppm, respectively. Results showed the spill mass distribution is a function of the longitudinal dispersion coefficient and the mass decay rate. Increasing the longitudinal dispersion coefficient reduces the spill impact widely, for instance after four days from the mass spill the maximum concentration decreased from 0.846789 to 0.486623 ppm, and after five days it decreased from 0.332485 to 0.186094 ppm by increasing the coefficient from 15 to 175 m2/sec. A similar reduction was achieved by increasing the decay rate from 0.8 to 1.2 day-1 (from 0.846789 to 0.254274 ppm and from 0.332485 to 0.0662202 ppm after four and five days, respectively). Thus, field measurements of these two factors must be taken into account to know the spill fate in river systems. |
| format | Article |
| id | doaj-art-7dacc920041345b6bdc4820ebcda3ce2 |
| institution | Kabale University |
| issn | 0972-6268 2395-3454 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Technoscience Publications |
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| series | Nature Environment and Pollution Technology |
| spelling | doaj-art-7dacc920041345b6bdc4820ebcda3ce22025-01-20T07:13:36ZengTechnoscience PublicationsNature Environment and Pollution Technology0972-62682395-34542024-12-012342157216610.46488/NEPT.2024.v23i04.020Numerical Modeling of Instantaneous Spills in One-dimensional River SystemsFatima M. A. Al-khafaji and Hussein A. M. Al-ZubaidiModeling the fate and transport of spills in rivers is critical for risk assessment and instantaneous spill response. In this research, a one-dimensional model for instantaneous spills in river systems was built by solving the advection-dispersion equation (ADE) numerically along with the shallow water equations (SWEs) within the MATLAB environment. To run the model, the Ohio River’s well-known accidental spill in 1988 was used as a field case study. The verification process revealed the model’s robustness with very low statistic errors. The mean absolute error (MAE) and root mean squared error (RMSE) relative to the absorbed record were 0.0626 ppm and 0.2255 ppm, respectively. Results showed the spill mass distribution is a function of the longitudinal dispersion coefficient and the mass decay rate. Increasing the longitudinal dispersion coefficient reduces the spill impact widely, for instance after four days from the mass spill the maximum concentration decreased from 0.846789 to 0.486623 ppm, and after five days it decreased from 0.332485 to 0.186094 ppm by increasing the coefficient from 15 to 175 m2/sec. A similar reduction was achieved by increasing the decay rate from 0.8 to 1.2 day-1 (from 0.846789 to 0.254274 ppm and from 0.332485 to 0.0662202 ppm after four and five days, respectively). Thus, field measurements of these two factors must be taken into account to know the spill fate in river systems.https://neptjournal.com/upload-images/(20)D-1640.pdfadvection dispersion equation instantaneous spills, numerical methods, one-dimentional river system, shallow water equations |
| spellingShingle | Fatima M. A. Al-khafaji and Hussein A. M. Al-Zubaidi Numerical Modeling of Instantaneous Spills in One-dimensional River Systems Nature Environment and Pollution Technology advection dispersion equation instantaneous spills, numerical methods, one-dimentional river system, shallow water equations |
| title | Numerical Modeling of Instantaneous Spills in One-dimensional River Systems |
| title_full | Numerical Modeling of Instantaneous Spills in One-dimensional River Systems |
| title_fullStr | Numerical Modeling of Instantaneous Spills in One-dimensional River Systems |
| title_full_unstemmed | Numerical Modeling of Instantaneous Spills in One-dimensional River Systems |
| title_short | Numerical Modeling of Instantaneous Spills in One-dimensional River Systems |
| title_sort | numerical modeling of instantaneous spills in one dimensional river systems |
| topic | advection dispersion equation instantaneous spills, numerical methods, one-dimentional river system, shallow water equations |
| url | https://neptjournal.com/upload-images/(20)D-1640.pdf |
| work_keys_str_mv | AT fatimamaalkhafajiandhusseinamalzubaidi numericalmodelingofinstantaneousspillsinonedimensionalriversystems |