Decision-making support-oriented multi-objective decision-making model for complex flood control system

In consideration of the combined operation of the complicated Yangtze River flood control system, a calculation method was proposed for the decomposition-coordination-recursion structure between subsystems, and a decision-making support-oriented multi-objective combined operation model was developed for the Yangtze River flood control system. In the present study, the boundary of the studied area was determined from the reservoirs on the main and tributaries of the middle and upper Yangtze River to the Hankou section, with the Three Gorges Reservoir and other reservoirs having been built taken into account, and three typical large flood hydrographs (1931, 1935, and 1954) were used for simulation. The result shows that the model not only can take into account the characteristics of multiple objectives and expansibility of the flood control system, the maneuverability of each reservoir, and the integral objective of the flood control system, but also can perform tradeoff analysis for each objective by adjustment of weight parameters related, and formulate decision making support-oriented system regulation schemes.