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                       A multi-objective risk operation model for real-time flood control of reservoir
                                             groups based on cloud computing


                                       1,2          1          3            1              1
                             CHEN Juan ,ZHANG Lu ,SUN Feifei ,DENG Ruxia ,ZHONG Pingan








                 (1. College of Hydrology and Water Resources,Hohai University,Nanjing  210098,China;2. Institute of Water Transfer Engineering,


                           Hohai University,Nanjing  210098,China;3. Ningbo Water Conservancy & Hydropower Planning and




                                            Design Institute Co.,Ltd,Ningbo  315000,China)

                Abstract:Real-time  flood  control  operation  of  a  multi-reservoir  system  is  a  risky  operation  influenced  by  many
                uncertain  factors.  This  paper  considers  the  uncertainty  of  hydrological  forecast  errors  and  establishes  a  multi-
                objective risk operation model of a multi-reservoir system with the objectives of minimizing the highest reservoir water
                level and minimizing the maximum discharge in the downstream section. Using the multi-objective golden eagle opti⁃
                mization algorithm (MOGEO),the "curse of dimensionality" problem is addressed from four perspectives:intelligent






                optimization  algorithms,risk  factor  simulation,parallel  computing,and  cloud  computing.  And  then,an  improved
                point cloud voxel down sampling method is proposed to extract the optimal operation scheme according to the spatial
                distribution of the set of non-inferior solutions. The Shiguanhe river basin is selected for case study. The results show
                that MOGEO reduces the calculation time of the model from 1,542 s of Non-Dominated Sorting Genetic Algorithm Ⅲ
                to 830 s. The improved Latin hypercube sampling method can ensure the sampling accuracy while reducing the calcu⁃

                lation time by 2/3. The calculation time using the cloud distributed cluster is 113 s,which is 1/6 of that on a single
                cloud server with 12-core parallel processing and 1/30 of the time for serial computation.




                Keywords:multi-reservoir  system;real-time  flood  control  operation;uncertainty;cloud  computing;distributed

                cluster
                                                                                     (责任编辑:耿庆斋)


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