Abstract:

With the rapid economical development in 21st century, the relationship between human and water has become a major issue for the social and economical development in China. Problems including the scarcity of water resources, the deterioration of water and pollution of water environment have become severer. On the basis of summarizing the experiences and lessons, the new strategy for flood management was proposed by people. The utilization of floodwater is an important issue for flood management, and an important measure to solve the crisis of water resource scarcity. As a key parameter of multipurpose reservoir operation, flood limit water level plays a critical role in achieving the balance between flood control and economic benefit such as hydropower generation and navigation improvement etc. Taking the floodwater utilization of Three Gorges Reservoir as an example, the criteria system was proposed based on multialternatives combined with the flood limit water level of Three Gorges Reservoir which satisfied the safety restriction. By computing the weights of all indexes based on Analytic Hierarchy Process method, the integrated weight of which all indexes corresponded to the total goal was presented, and the best equilibrium solution of the operation alternatives of floodwater utilization multiobjective decision making was obtained according to the equilibrium programming, which can give reference for the multiobjective decision making operation in floodwater utilization of the Three Gorges Reservoir.

Key words: floodwater utilization, multi objective decision making operation, Analytic Hierarchy Process method, equilibrium programming, Three Gorges Reservoir