<abstract xmlns="http://www.w3.org/1999/xhtml"><p> Environmental impacts of oil spills affecting urban sewage networks can be eliminated if timely intervention is taken. The design of such actions requires knowledge of the transport of surface pollutants in open channels. In this study we investigated the travel time and dispersion of pollutants by means of tracer experiments in sewage networks and a creek. The travel time of surface tracers has been found to be significantly shorter than that of a bulk flow tracer. The ratio of the travel times of a bulk flow tracer and surface tracers agreed with the known correlations obtained for rivers. An increasing tendency in the ratio of travel times has been observed for increasing bulk flow velocity. A segment-wise dispersion model was implemented in the existing hydraulic model of a sewer system. The simulation results were compared with the experimental observations. The dispersion rate of the bulk flow tracer has been found to obey Taylor’s mixing theory for long channels and was more intensive than that of surface tracers in community sewage channels.</p></abstract>

Environmental impacts of oil spills affecting urban sewage networks can be eliminated if timely intervention is taken. The design of such actions requires knowledge of the transport of surface pollutants in open channels. In this study we investigated the travel time and dispersion of pollutants by means of tracer experiments in sewage networks and a creek. The travel time of surface tracers has been found to be significantly shorter than that of a bulk flow tracer. The ratio of the travel times of a bulk flow tracer and surface tracers agreed with the known correlations obtained for rivers. An increasing tendency in the ratio of travel times has been observed for increasing bulk flow velocity. A segment-wise dispersion model was implemented in the existing hydraulic model of a sewer system. The simulation results were compared with the experimental observations. The dispersion rate of the bulk flow tracer has been found to obey Taylor’s mixing theory for long channels and was more intensive than that of surface tracers in community sewage channels.

Dispersion and Travel Time of Dissolved and Floating Tracers in Urban Sewers

Department of Fluid Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3-9. 1111 Budapest, Hungary

Slovak Journal of Civil Engineering

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

{"article-title":"Dispersion and Travel Time of Dissolved and Floating Tracers in Urban Sewers"}

Environmental impacts of oil spills affecting urban sewage networks can be eliminated if timely intervention is taken. The design of such actions requires...

Dispersion and Travel Time of Dissolved and Floating Tracers in Urban Sewers

Publié en ligne: 12 avr. 2014

Pages: 1 - 8

DOI: https://doi.org/10.2478/sjce-2014-0001

Mots clés
Oil spill, open channel flow, pollutant dispersion, trace elements, travel time, water pollution

© Faculty of Civil Engineering, Slovak University of Technology

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Dispersion and Travel Time of Dissolved and Floating Tracers in Urban Sewers

Publié en ligne: 12 avr. 2014

Pages: 1 - 8

DOI: https://doi.org/10.2478/sjce-2014-0001

Mots clésOil spill, open channel flow, pollutant dispersion, trace elements, travel time, water pollution

© Faculty of Civil Engineering, Slovak University of Technology

This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Mots clés
Oil spill, open channel flow, pollutant dispersion, trace elements, travel time, water pollution