Experimental analysis and numerical simulation of bed elevation change in mountain rivers
Studies of sediment transport problems in mountainous rivers with steep slopes are difficult due to rapid variations in flow regimes, abrupt changes in topography, etc. Sediment transport in mountainous rivers with steep slopes is a complicated subject because bed materials in mountainous rivers are...
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| Format: | Online |
| Language: | English |
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Springer International Publishing
2016
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4943910/ |
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pubmed-4943910 |
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pubmed-49439102016-07-26 Experimental analysis and numerical simulation of bed elevation change in mountain rivers Dang, Truong An Park, Sang Deog Research Studies of sediment transport problems in mountainous rivers with steep slopes are difficult due to rapid variations in flow regimes, abrupt changes in topography, etc. Sediment transport in mountainous rivers with steep slopes is a complicated subject because bed materials in mountainous rivers are often heterogeneous and contain a wide range of bed material sizes, such as gravel, cobbles, boulders, etc. This paper presents a numerical model that was developed to simulate the river morphology in mountainous rivers where the maximum bed material size is in the range of cobbles. The governing equations were discretized using a finite difference method. In addition, an empirical bed load formula was established to calculate the bed load transport rate. The flow and sediment transport modules were constructed in a decoupled manner. The developed model was tested to simulate the river morphology in an artificial channel and in the Asungjun River section of the mountainous Yangyang Namdae River (South Korea). The simulation results exhibited good agreement with field data. Springer International Publishing 2016-07-13 /pmc/articles/PMC4943910/ /pubmed/27462523 http://dx.doi.org/10.1186/s40064-016-2714-3 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Dang, Truong An Park, Sang Deog |
| spellingShingle |
Dang, Truong An Park, Sang Deog Experimental analysis and numerical simulation of bed elevation change in mountain rivers |
| author_facet |
Dang, Truong An Park, Sang Deog |
| author_sort |
Dang, Truong An |
| title |
Experimental analysis and numerical simulation of bed elevation change in mountain rivers |
| title_short |
Experimental analysis and numerical simulation of bed elevation change in mountain rivers |
| title_full |
Experimental analysis and numerical simulation of bed elevation change in mountain rivers |
| title_fullStr |
Experimental analysis and numerical simulation of bed elevation change in mountain rivers |
| title_full_unstemmed |
Experimental analysis and numerical simulation of bed elevation change in mountain rivers |
| title_sort |
experimental analysis and numerical simulation of bed elevation change in mountain rivers |
| description |
Studies of sediment transport problems in mountainous rivers with steep slopes are difficult due to rapid variations in flow regimes, abrupt changes in topography, etc. Sediment transport in mountainous rivers with steep slopes is a complicated subject because bed materials in mountainous rivers are often heterogeneous and contain a wide range of bed material sizes, such as gravel, cobbles, boulders, etc. This paper presents a numerical model that was developed to simulate the river morphology in mountainous rivers where the maximum bed material size is in the range of cobbles. The governing equations were discretized using a finite difference method. In addition, an empirical bed load formula was established to calculate the bed load transport rate. The flow and sediment transport modules were constructed in a decoupled manner. The developed model was tested to simulate the river morphology in an artificial channel and in the Asungjun River section of the mountainous Yangyang Namdae River (South Korea). The simulation results exhibited good agreement with field data. |
| publisher |
Springer International Publishing |
| publishDate |
2016 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4943910/ |
| _version_ |
1613608853844262912 |