Interdependent infrastructure modelling: Intergration of domestic water models

In order to assess the viability of using EPAnet source code and the time domain Infrastructure Interdependencies Simulator (I2Sim) for predictive modeling, a critical failure of a municipal water supply was modeled on a university campus. During winter operations, a campus steam plant experienced a failure in operations due in part from an unobserved anomaly in the municipal water supply. The subsequent explosion which disabled campus heating caused building closures and nearly resulted in an evacuation of a major hospital. The representation of the campus municipal water distribution system was built with external stresses applied to produce system conditions equivalent to those during the failure. The data was imported directly into a test model simulating interdependent systems to see if the complete failure could then be simulated. Preliminary results have effectively recreated the incident with only some temporal errors. The results of the exercise have provided insight into operational limitations, appropriate mitigation response and water system redesign to improve its reliability.