DOI: 10.1016/j.watres.2018.08.062
Scopus记录号: 2-s2.0-85053056514
论文题名: A tri-modal flocculation model coupled with TELEMAC for estuarine muds both in the laboratory and in the field
作者: Shen X. ; Lee B.J. ; Fettweis M. ; Toorman E.A.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 473
结束页码: 486
语种: 英语
英文关键词: Belgian coastal zones
; Cohesive sediments
; Population balance equation
; Settling column
; TELEMAC
; Three classes
Scopus关键词: Coastal zones
; Deposition rates
; Estuaries
; Information dissemination
; Open source software
; Open systems
; Suspended sediments
; Cohesive sediments
; Population balance equation
; Settling columns
; TELEMAC
; Three classes
; Flocculation
; coastal water
; cohesive sediment
; concentration (composition)
; deposition
; equation
; estuarine environment
; experimental study
; field method
; flocculation
; hydrodynamics
; in situ measurement
; laboratory method
; sediment pollution
; software
; suspended sediment
; three-dimensional modeling
; article
; coastal waters
; concentration (parameters)
; flocculation
; human
; seashore
; sediment
; simulation
; Belgium
英文摘要: Estuarine and coastal regions are often characterized by a high variability of suspended sediment concentrations in their waters, which influences dredging projects, contaminant transport, aquaculture and fisheries. Although various three-dimensional open source software are available to model the hydrodynamics of coastal water with a sediment module, the prediction of the fate and transport of cohesive sediments is still far from satisfied due to the lack of an efficient and robust flocculation model to estimate the floc settling velocity and the deposition rate. Single-class and sometimes two-class flocculation models are oversimplified and fail to examine complicated floc size distributions, while quadrature-based or multi-class based flocculation models may be too complicated to be coupled with large scale estuarine or ocean models. Therefore, a three-class population balance model was developed to track the sizes and number concentrations of microflocs, macroflocs and megaflocs, respectively. With the assumption of a fixed size of microflocs and megaflocs, only four tracers are needed when coupled with the open-source TELEMAC system. It enables better settling flux estimates and better addresses the occurrence and concentration of larger megaflocs. This tri-modal flocculation model was validated with two experimental data sets: (1) 1-D settling column tests with the Ems mud and (2) in-situ measurements at the WZ Buoy station on the Belgian coast. Results show that the flocculation properties of cohesive sediments can be reasonably simulated in both environments. It is also found that the number of macroflocs created, when a larger macrofloc breaks up, is a statistical mean value and may not be an integer when applying the model in the field. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112405
Appears in Collections: 气候减缓与适应
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作者单位: Hydraulics Laboratory, Department of Civil Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 40, Leuven, B-3001, Belgium; School of Construction and Environmental Engineering, Kyungpook National University, 2559, Gyeongsang-daero, Sangju, Gyeongbuk 742-711, South Korea; Operational Directorate Natural Environment, Royal Belgian Institute of Natural Sciences, Rue Vautier 29, Brussels, 1000, Belgium
Recommended Citation:
Shen X.,Lee B.J.,Fettweis M.,et al. A tri-modal flocculation model coupled with TELEMAC for estuarine muds both in the laboratory and in the field[J]. Water Research,2018-01-01,145