A multi-objective optimization model for rainwater pipe networks is established by taking the enhancement of the economy and toughness of rainwater pipe network as the objective,the practical engineering specifications as the constraint,and the pipe diameters and the bottom elevation of manhole as the decision variable.Based on the PlatEMO multi-objective optimization platform,MATLAB is used to embed SWMM into the optimizing process.Three optimization algorithms of NSGA-Ⅱ,NSGA-Ⅲ and AGE-MOEA are selected to solve and compare the solution set quality and the solving speed.Taking an area in Xi'an as a research case,the model is validated.The research results show that(1)the rainwater drainage scheme obtained from the optimization model can meet the different engineering requirements.(2)The AGE-MOEA algorithm has the highest solution set quality,and NSGA-Ⅲ has a relatively fast solving speed.(3)The optimization scheme can simultaneously meet the requirements of pipe network economy and toughness.
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