A system for simulating interdependencies between multiple critical physical infrastructure models includes a first infrastructure data model that models a first physical infrastructure; a second infrastructure data model that models a second physical infrastructure, wherein the second physical infrastructure is a different physical infrastructure from the first physical infrastructure; a simulation engine adapted to automatically produce a change in the second infrastructure data model in response to a change in the first infrastructure data model; a user interface permitting a user to interact with the simulation engine; wherein the user interface and the simulation engine are configured such that the user can disable an element of the first physical infrastructure, and subsequently re-enable the element of the first physical infrastructure; wherein the first infrastructure data model comprises a transport network; and wherein the second infrastructure data model comprises a channel network.