A Bi-Level Waste Load Allocation Model Based on Water Function Zoning for Sichuan-Neijiang

Water pollution is becoming very serious currently, and has been a major bottleneck in China's economic and social sustainable development. Because rivers has no clear division of functions and protection requirements early, there has been no clear goals of water conservation, which has affected the overall water resources management and protection work carried out. So it is urgent for local basin management committee to reasonably allocate waste based on the water function zoning. In this paper, we focus on water function zoning waste load allocations, and develops equilibrium strategies to balance the needs of both the first level and the second level water function zoning. In order to solve the problem between the two level function zoning, a bi-level optimization model is proposed to minimize water pollution. Finally, a practical case from Neijiang segment of Tuojiang, a typical developing city with typical water function zoning, is given to demonstrate the effectiveness of the proposed model. Some operational policies are developed to assist decision-makers cope with pollution limitation for water function zoning.