As the development of long-distance complex water diversion systems in our nation, numerical simulation method is applied widely because of its efficiency, economy and safety. By analysis of the simulation study of water diversion systems, the obvious disadvantages of nowaday simulation method, differential equation oriented simulation, are indicated, and two new simulation methods are introduced in the simulation of water diversion systems, which are the object-oriented simulation and structural drawing oriented simulation. This paper gives the detail process of the structural drawing oriented simulation in water diversion systems. With a simulating instance, it is found that the structural drawing oriented simulation optimizes the simulating model, including improving the structuralization and modularization of the simulation model, advancing the reusability of the simulation program, simplifying the simulation modeling, and making the process of complex water transfer simulation visual and easier.
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