WATER QUALITY SIMULATOR

PROBLEM TO BE SOLVED: To provide a water quality simulator which can simulate all the water quality components accurately and administrate/control the operation of a water treatment plant based on the results of the simulation. SOLUTION: The water quality simulator has a basic model housing part 1 for housing a basic model (a water quality model and a process model) used in simulation, a different kind model information inputting part 5 for inputting a different kind model different from the basic model, and a different kind model changing part 3 which changes the basic model housed in the part 1 and makes the different kind model to be used in the simulation. The different kind model made by the part 3 is sent to a different kind model implementation part 2, in the part 2, the simulation is implemented by a model expression in the different kind model with an input value group (assembly A) 6 inputted, and an output value group (assembly A') 7 is output.