Modeling the Transport of Sediments and Hydrophobic Contaminants in the Lower Saginaw River |
| |
| Affiliation: | 1. Department of Environmental and Resource Engineering (DTU Sustain), Technical University of Denmark, Bygningstorvet, Building 115, 2800 Kgs., Lyngby, Denmark;2. Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf 8600, Switzerland;3. Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich, Zurich 8093, Switzerland;4. University of Lyon, INSA Lyon, DEEP, EA 7429, 11 rue de la Physique, Villeurbanne Cedex F-69621, France;5. Department of Civil Engineering, Institute for Urban Water Management, Technical University Kaiserslautern, Kaiserslautern 67663, Germany;6. Department of Aquatic Environmental Engineering, Institute for Water and River Basin Management, Karlsruhe Institute of Technology (KIT), Gotthard-Franz-Str. 3, Karlsruhe 76131, Germany;7. ICRA, Catalan Institute for Water Research, Scientific and Technological Park of the University of Girona, H2O Building, Emili Grahit 101, Girona 17003, Spain;8. ICREA, Catalan Institute for Research and Advanced Studies, Barcelona 08010, Spain;9. Leesu, École des Ponts ParisTech, Université Paris-Est Créteil. 6-8 avenue Blaise Pascal, Cité Descartes, Marne-la-Vallée cedex 2, 77455, France;10. Kompetenzzentrum Wasser Berlin (KWB), Berlin 10961, Germany;11. U.S. Geological Survey, Upper Midwest Water Science Center, Madison 53726, WI, United States;1. Laboratory of Geotechnics, Ghent University, Zwijnaarde 9052, Belgium;2. Department of Civil and Environmental Engineering, Bucknell University, Lewisburg, PA 17837, United States;3. ARM Group Inc., 9175 Guilford Rd, Suite 310, Columbia, MD 20146, United States;1. Baltic Sea Centre, Stockholm University, SE-106 91 Stockholm, Sweden;2. Latvian Environmental, Geology and Meteorology Centre, Maskavas iela 165, LV-1016 Riga, Latvia;3. Institute of Biology, University of Latvia, Jelgavas iela 1, LV-1004 Riga, Latvia;4. Laboratory Centre, Finnish Environment Institute, FI-40500 Jyväskylä, Finland;5. Institute of EcoScience, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark;6. Institute of Oceanology Polish Academy of Sciences, ul. Powstańców Warszawy 55, 81-712 Sopot, Poland |
| |
| Abstract: | A study of processes that are significant in the transport and fate of sediments and hydrophobic contaminants in the lower Saginaw River over long periods of time, up to 25 years, has been made. The numerical model used in the analysis consists of a two-dimensional, vertically-integrated, time-dependent hydrodynamic and sediment transport model coupled (a) with a three-dimensional, time-dependent model of the dynamics of the sediment bed and its properties and (b) with a model of the transport and fate of hydrophobic contaminants. Calculations of sediment transport for different magnitude flow events demonstrate the variations in erosion and deposition at different sites and the dependence of this erosion and deposition on the flow rate. These calculations also illustrate the inherent variability, or uncertainty, in any long-term predictions since the results depend to a great extent on the times of occurrence of the largest flow events, times which can not be predicted but are only known statistically. The transport and fate of PCBs were also investigated with the emphasis on the effects of (a) large flow events, (b) incoming upstream PCB loads, and (c) burial of contaminated sediments by clean sediments with subsequent erosion of sediments by a large flow event. The analysis clearly shows that the major erosion of contaminated sediments occurs at the edge of the river channel with little erosion of contaminated sediments in the near-shore area. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
