ICPR is a comprehensive hydrodynamic stormwater modeling system that includes an integrated hydrology component. It is extremely flexible and can be used for the design of single detention ponds for the smallest site plans or modeling of the largest and most complex regional systems with thousands of nodes and links.

ICPR has been in use for more than 25 years and was the first commercial program of its kind to successfully solve the problem of flood routing through complex networks of interconnected and hydraulically interdependent stormwater ponds

The three primary building blocks in ICPR are Basins, Nodes and Links. Stormwater runoff hydrographs are generated for basins and then assigned to nodes in the drainage network. Nodes are used to represent ponds and specific locations in the drainage network such as along channels, streams, rivers, and junctions in pipe systems. Stages are calculated at each of the nodes and links such as pipes, channel segments, weirs, and bridges are used to connect nodes together. Flow rates are calculated for links based on stages at nodes.