Affected by global climate change, the frequency of extreme weather events increases in China, and the suddenness, harmfulness and unpredictability of the flood disaster exceeding the designed level are more serious. As a result, emergency response problems facing cascade reservoirs are increasingly prominent, among which the dam break or consecutive break is the greatest threat to cascade reservoirs. In case of floods exceeding the designed level, cooperative emergency regulation of cascade reservoirs is an effective method to develop the comprehensive benefit of reservoirs. In this paper, the criterion of minimizing the highest water level is chosen as the objective function of the cooperative emergency regulation model in cope with floods exceeding the designed level, with the progressive optimality algorithm adopted to solve the function. Moreover, the related emergency regulation plan is conductively explored. In addition, the Pubugou Reservoir, Shenxigou Reservoir, and Zhentouba I Reservoir on the Dadu River are taken as examples to regulate and calculate the flooding process, which verifies the validity and reliability of the preceding model. According to the results, by means of cooperative emergency regulation of cascade reservoirs, each reservoir pre-discharges water in the early flood to maximize the storage capacity, thus coping with the possibly coming flood, minimizing the water level of each reservoir, and effectively ensuring flood control safety for cascade reservoirs. The research results are of great theoretical significance and engineering practice value for establishing the emergency regulation mechanism to cope with floods exceeding the designed level for cascade reservoirs in each river basin. CLC number: TV321 Document code: A
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