Operational Dispersion Model for emergency services

0565823 - ÚT 2023 CZ eng A - Abstrakt
Chaloupecká, Hana
Operational Dispersion Model for emergency services.
International Workshop on Physical Modeling of Flow and Dispersion Phenomena - Book of Abstracts. Prague: Institute of Thermomechanics of the Czech Academy of Sciences, 2022 - (Jurčáková, K.; Kellnerová, R.). s. 37-37. ISBN 978-80-87012-81-9.
[PHYSMOD 2022 - The International Workshop on Physical Modelling of Flow and Dispersion Phenomena. 29.08.2022-31.08.2022, Praha]
Institucionální podpora: RVO:61388998
Klíčová slova: puff * release * wind tunnel * puff model * lagrangian model * Gaussian model
Obor OECD: Meteorology and atmospheric sciences

The paper introduces a model enabling to predict a situation after a gas leakage. The model predicts both, the situation after the long and short gas leakage. It is under development and currently two
versions of the model exist. Both versions of the model utilize a sub-model enabling to recalculate the concentrations predicted for the continuous source into those valid for the short-term leakages. This sub-model was developed using data from wind tunnel modeling and has two modes – for an urban area or for a rural region. The difference in the versions is in the prediction of the oncentrations valid for a continuous leakage. The first version utilizes a simple Gaussian model based on the Industrial Source Complex model (ISC2) developed by U.S. Environmental Protection Agency (EPA). The second version of the model uses a simple mass-consistent model to estimate all the inputs needed by a lagrangian model, which is then utilized to predict the dispersion of the concentration in the exposed area. The paper introduces both versions of the model and shows their results compared to wind tunnel data. Standard validation procedures were used – e.g., fractions within a factor of two, fractional bias.
Trvalý link: https://hdl.handle.net/11104/0337689