Dispersion scenarios for pollution release in an occupied underground station - a numerical study with a micro-scale and a multi-agent model
Authored by Guenter Gross
Date Published: 2015
DOI: 10.1127/metz/2015/0680
Sponsors:
Deutsche Forschungsgemeinschaft
Platforms:
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Model Documentation:
Other Narrative
Mathematical description
Model Code URLs:
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Abstract
The release of hazardous material in a subway station is a dangerous
situation for passengers and staff. To achieve an acceptable level of
risk, a correct marking of emergency exits and escape routes is
essential., For this purpose, underground air dispersion, which depends
on source characteristics, the construction layout of the station, and
meteorological conditions, must be known. In this paper a micro-scale
wind model is combined with a dispersion model to calculate the spread
of pollutants underground as well as aboveground for specific scenarios.
In particular, the effect of emission temperature on the contamination
of the subway facilities was studied. Completely different spots with
high concentrations have been calculated for hot and cold sources.
Depending on the scenario, an escape route is not always safe, underlining the need for a situation-related adaptive marking system.
Further information on the optimisation of a safe way out is provided by
the results of an agent-based simulation model. Depending on the number
and on the individual characteristics of the agents, the contamination
level can be estimated, which could help in the prioritisation process
between alternative escape routes.
Tags
Simulations
systems
Smoke temperature distribution
Air-flow
Ventilation
Train