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2 Journal of Polish Safety and Reliability Association

2 2017

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Risks and consequences of weather hazards on railway infrastructure

Berg H. P.

Journal of Polish Safety and Reliability Association

2017

Vol. 8, No. 1

1--12

Weather-related hazards are already among the factors most frequently causing disturbances for railways. Flooding and storm are considered major threats to the system. Climate change might in the long run produce new kinds of hazards and threats to the railway system, but the climate change will principally involve a strengthening of the already known threats, in terms of increased frequency as well as increased intensity. Based on examples of natural hazards’ impact on railways, possible approaches of vulnerability assessment are described which could also address potential consequences of climate change. In order to reduce the effects of weather hazards technical countermeasures are necessary, but also an appropriate risk management as, e.g., required for flooding in the European Union.

Integrated Impact Model on Critical Infrastructure Safety Related to Climate-Weather Change Process Including Extreme Weather Hazards

Kołowrocki K., Soszyńska-Budny J., Torbicki M.

Journal of Polish Safety and Reliability Association

2017

Vol. 8, No. 4

21--32

In the paper a general safety analytical model of complex technical system related to the climateweather change process in its operating area is defined. First, the system operation at climate-weather variable conditions is given. Additionally, the semi-Markov approach is used. Further, the safety model of the multistate system at climate-weather variable conditions is introduced. The notions of the conditional safety functions at the climate-weather particular states, the unconditional safety function and the risk function of the complex system at changing in time climate-weather conditions are presented. The other safety indices like mean lifetime up to the exceeding a critical safety state, the moment when the risk function value exceeds the acceptable safety level, the intensities of ageing of the critical infrastructure and its components and the coefficients of the climate-weather impact on the critical infrastructure and its components intensities of ageing are defined.