DOI: 10.5194/hess-18-3539-2014
Scopus记录号: 2-s2.0-84907028996
论文题名: Modelling suspended-sediment propagation and related heavy metal contamination in floodplains: A parameter sensitivity analysis
作者: Hostache R ; , Hissler C ; , Matgen P ; , Guignard C ; , Bates P
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 9 起始页码: 3539
结束页码: 3551
语种: 英语
Scopus关键词: Flood-plains
; Heavy metal contamination
; Parameter sensitivity analysis
; concentration (composition)
; database
; floodplain
; heavy metal
; model validation
; river channel
; sensitivity analysis
; settling velocity
; soil pollution
; suspended sediment
; time series
; two-dimensional modeling
英文摘要: Fine sediments represent an important vector of pollutant diffusion in rivers. When deposited in floodplains and riverbeds, they can be responsible for soil pollution. In this context, this paper proposes a modelling exercise aimed at predicting transport and diffusion of fine sediments and dissolved pollutants. The model is based upon the Telemac hydro-informatic system (dynamical coupling Telemac-2D-Sysiphe). As empirical and semiempirical parameters need to be calibrated for such a modelling exercise, a sensitivity analysis is proposed. An innovative point in this study is the assessment of the usefulness of dissolved trace metal contamination information for model calibration. Moreover, for supporting the modelling exercise, an extensive database was set up during two flood events. It includes water surface elevation records, discharge measurements and geochemistry data such as time series of dissolved/particulate contaminants and suspended-sediment concentrations. The most sensitive parameters were found to be the hydraulic friction coefficients and the sediment particle settling velocity in water. It was also found that model calibration did not benefit from dissolved trace metal contamination information. Using the two monitored hydrological events as calibration and validation, it was found that the model is able to satisfyingly predict suspended sediment and dissolve pollutant transport in the river channel. In addition, a qualitative comparison between simulated sediment deposition in the floodplain and a soil contamination map shows that the preferential zones for deposition identified by the model are realistic. © Author(s) 2014. CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78139
Appears in Collections: 气候变化事实与影响
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作者单位: CRP-Gabriel Lippmann, 41 rue du brill, Belvaux, Luxembourg; Bristol University, University Road, Clifton, Bristol, United Kingdom
Recommended Citation:
Hostache R,, Hissler C,, Matgen P,et al. Modelling suspended-sediment propagation and related heavy metal contamination in floodplains: A parameter sensitivity analysis[J]. Hydrology and Earth System Sciences,2014-01-01,18(9)