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Two-Dimensional Numerical Simulation of Bed-Load Transport of a Finite-Depth Sediment Layer: Applications to Channel Flushing

  • Numerical modeling of bed-load transport in shallow flows, particularly oriented toward environmental flows, is an active field of research. Nevertheless, other possible applications exist. In particular, bed-load transport phenomena are relevant in urban drainage systems, including sewers. However, few applications of coupled two-dimensional (2D) shallow-water and bed-load transport models can be found, and their transfer from environmental applications — usually river and floodplain — into sewer applications requires some adaptation. Unlike to river systems, where there is a thick layer of sediment that constitutes a movable riverbed, sewer systems have thin layers of sediment that need to be removed, thus exposing a rigid, nonerodible surface. This problem requires careful numerical treatment to avoid generating errors and instability in the simulation. This paper deals with a numerical approach to tackle this issue in an efficient way that allows large-scale studies to be performed and provides empirical evidence that the proposedNumerical modeling of bed-load transport in shallow flows, particularly oriented toward environmental flows, is an active field of research. Nevertheless, other possible applications exist. In particular, bed-load transport phenomena are relevant in urban drainage systems, including sewers. However, few applications of coupled two-dimensional (2D) shallow-water and bed-load transport models can be found, and their transfer from environmental applications — usually river and floodplain — into sewer applications requires some adaptation. Unlike to river systems, where there is a thick layer of sediment that constitutes a movable riverbed, sewer systems have thin layers of sediment that need to be removed, thus exposing a rigid, nonerodible surface. This problem requires careful numerical treatment to avoid generating errors and instability in the simulation. This paper deals with a numerical approach to tackle this issue in an efficient way that allows large-scale studies to be performed and provides empirical evidence that the proposed approach is accurate and applicable for sewage and channel-flushing problems.show moreshow less

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Metadaten
Author: Daniel Caviedes-VoullièmeORCiD, Mario Morales-Hernández, Carmelo Juez, Asier Lacasta, Pilar García-Navarro
DOI:https://doi.org/10.1061/(ASCE)HY.1943-7900.0001337
ISSN:0733-9429
ISSN:1943-7900
Title of the source (English):Journal of Hydraulic Engineering
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2017
Tag:Channel flushing; Exner equation; Finite-depth sediment layer; Graphics-processing unit (GPU) computing; Maximum erodability; Partially erodible bed; Shallow water; Thin sediment layer
Volume/Year:143
Issue number:9
First Page:04017034
Faculty/Chair:Fakultät 2 Umwelt und Naturwissenschaften / FG Hydrologie
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