Based on the numerical solution of Saint Venant Equations and proportional control mode, the author established a computer program for simulating automatic upstream control irrigation canal system.

Usually upstream countries dominate control of a river, like the Tigris and Euphrates, which are much reduced by the time they flow into Iraq from Turkey and Syria.

This dependency is achieved by the Kanban exchange occurring in the store, pushing the production control information from the downstream process to the upstream.