1. A system for simulating interdependencies between multiple critical physical infrastructure models, comprising: (a) a first infrastructure data model that models a first physical infrastructure; (b) 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; (c) 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; (d) a user interface permitting a user to interact with the simulation engine; (e) wherein the user interface and the simulation engine are configured such that the user can disable an element of the first infrastructure data model, and subsequently re-enable the element of the first infrastructure data model; (f) wherein the first infrastructure data model comprises a transport network; (g) wherein the second infrastructure data model comprises a channel network; (h) wherein the user interface and the simulation engine are configured to: (i) run a consistency check, (ii) regenerate relationships, (iii) support redundancy, and (iv) generate a relationship report; (i) wherein the user interface and the simulation engine: (i) support integrated model monitoring, (ii) include an integrated model deletion shield, and (iii) are implemented utilizing a means for validation; (j) wherein the system is a web-enabled system; and (k) wherein the system comprises a generic service framework.