Reference : Quantitative and qualitative evaluation of sediment and contaminant transport in the ...
Scientific congresses and symposiums : Paper published in a book
Physical, chemical, mathematical & earth Sciences : Chemistry
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/172735
Quantitative and qualitative evaluation of sediment and contaminant transport in the Samme river catchment (Brabant region - Belgium)
English
Denis, Anne-Cécile mailto [Université de Liège / Institut Scientifique de Service Public > Département de géographie / Direction des Risques Chroniques > Hydrographie et géomorphologie fluviatile / Cellule Risques sous-sol > >]
Van Campenhout, Jean mailto [Université de Liège - ULiège > Département de géographie > Hydrographie et géomorphologie fluviatile >]
Bouffioux, Anne mailto [Service Public de Wallonie - DGO2 > Département des Etudes et de l'Appui à la Gestion > Direction des Recherches Hydrauliques > >]
Houbrechts, Geoffrey mailto [Université de Liège - ULiège > Département de géographie > Département de géographie >]
Hallot, Eric mailto [Université de Liège - ULiège > Département de géographie > Hydrographie et géomorphologie fluviatile >]
Bousmar, Didier mailto [Service Public de Wallonie - DGO2 > Département des Etudes et de l'Appui à la Gestion > Direction des Recherches Hydrauliques > >]
Veschkens, Mathieu mailto [Institut Scientifique de Service Public - ISSeP > Direction des Risques Chroniques > > >]
Petit, François mailto [Université de Liège - ULiège > Département de géographie > Hydrographie et géomorphologie fluviatile >]
Sep-2014
Proceedings of 4th International Symposium on Sediment Management
Maggioli Editore è un marchio di Maggioli S.p.A.
475-482
No
No
International
4th International Symposium on Sediment Management
September 17-19, 2014
Ferrara Fiere Congressi
Politecnico di Milano - Department of Civil and Environmental Engineering - Environmental Section
Ecole des Mines de Douai
Ferrara
Italy
[en] Sediment transport ; suspended matter ; PCB ; Samme river ; Origin of sediments contaminated by PCB
[en] In Wallonia (Belgium), the maintenance of waterways is currently exclusively managed in a curative way. When local sediment accumulations are detected in waterways, bathymetric surveys are conducted in order to quantify the volume of sediment to be removed and chemical analyses of samples allow the characterization of sediment quality. Collected data only allow a short-term management of the matter generated by dredging operations. Medium- or long-term planning of dredging operations is currently not possible, due to a lack of knowledge on sediment fluxes and associated pollutant transport. In particular, issues related to the interactions and mixing of recent and older sediments, or to the input of sediment from unnavigable waterways into larger navigable waterways, are poorly understood. Operational tools allowing the assessment of the effectiveness of preventive measures to be implemented in order to improve the management of sediment in Walloon waterways also have to be developed.
This research project aims at contributing to the development of such tools and focuses on the Samme river watershed (Senne catchment – loamy Brabant Region), deemed to be representative of Walloon issues. The Samme river is categorized as an unnavigable waterway. It runs along the old Charleroi-Brussels canal and flows into the new Charleroi-Brussels canal at the foot of the Ronquières inclined plane. The sediments of the bed of the Samme river are characterized by a high concentration of micropollutants (mainly PCB) and contribute to the contamination of a greater volume of sediments in the new Charleroi-Brussels canal, significantly increasing the cost of periodic dredging operations in the canal.
The methodology developed is based on (I) an extended monitoring of sediment and pollutant fluxes at the outlet of the catchment and (II) an assessment of within-catchment sediment and pollutant transport. The origin of the Samme riverbed sediments contamination by PCB is poorly understood. Chemical analyses of the sediments of the bed were carried out along the linear course of the Samme river and its main tributary in order to identify the source of pollution. However, numerous connections between the old canal and the Samme river contribute to the transfer of stream sediments and pollutants between both systems and complicate the identification of the source of PCB. At the outlet of the catchment, different methods of river sediment sampling (automatic samplers, turbidity sensors, Time Integrated Samplers) are currently being implemented in order to (I) monitor the amount of suspended matter carried by the Samme river into the Charleroi-Brussels canal, (II) evaluate the associated fluxes of pollutants and (III) evaluate the possibility of setting up a system of retention of the sediments in the Samme catchment.
Institut scientifique de Service public - ISSeP
Région wallonne : Institut scientifique de Service public - ISSeP
GISSeD
Researchers ; Professionals
http://hdl.handle.net/2268/172735
http://www.issep.be/gissed/
© Copyright 2014 by Maggioli S.p.A.

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