Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 21, Issue 8, Pages 5347-5356Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-013-2455-6
Keywords
Sedimentation; Particle tracking; Boundary condition; Turbulent kinetic energy; Resuspension; Settling velocity; Particulate contaminants; CFD modelling
Categories
Funding
- OTHU (Observatoire de Terrain en Hydrologie Urbaine)
- Labex IMU
- ANR CESA CABRRES programme
- Chinese Scholarship Council
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Sedimentation is a common but complex phenomenon in the urban drainage system. The settling mechanisms involved in detention basins are still not well understood. The lack of knowledge on sediment transport and settling processes in actual detention basins is still an obstacle to the optimization of the design and the management of the stormwater detention basins. In order to well understand the sedimentation processes, in this paper, a new boundary condition as an attempt to represent the sedimentation processes based on particle tracking approach is presented. The proposed boundary condition is based on the assumption that the flow turbulent kinetic energy near the bottom plays an important role on the sedimentation processes. The simulated results show that the proposed boundary condition appears as a potential capability to identify the preferential sediment zones and to predict the trapping efficiency of the basin during storm events.
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