Cybernetic problem of water contamination based on BOD-DO model

This paper analyses the mechanism of water contamination problem through mathematical modeling, which is concerned with the controlling of multi processing factories along with multi reaches. Firstly, following some principles the controllable area is divided into many sections with suitable cross-sections chosen, and BOD-DO water quality model is deduced. Then it is expounded how to detect the hidden contamination source exactly enough, with prior knowledge grasped and actual sample results gained. The cybernetic problem about real-time optimization of water quality is discussed around how to minimize the cost while keeping the water quality.