Water Distribution System Risk Assessment Method

The risk assessment proposed in this paper is a method based on the calculation of three kind of indicators based on the probability of threat incidents and assessing the subsequent consequences of these ones. The consequences are measured by the upset to the service; its scope, which for the distribution service is normally quantified by the number of properties affected; and by the duration of the upset, which is directly related to the concept of system resilience or response capacity. The method to characterise a distribution system by means of risk principles aims to support better decisions, accounting for different risk assessment scopes for the purpose depending on the type of decision to be made and the time horizons involved.