26EcologicalInfrastructurePriority:WuhanWulijieEcologicalCityCase/YuKongjian,ZhangYuan,LiuYunqian[Abstract]Thekeyofecologicalurbandesignisestablishinganinfrastructuralsystemwhichprovidesasetofservicesforsustainabledevelopmentandlivableenvironmentcreation.Theservicesincludenaturalorganismproduction,environmentaladjustment,lifecapacity,recreation,andbeautification,andtheyallneedhighinvestmentandmaintenancefromtraditionalgreyinfrastructuralsysteminindustrialcities.WuhanWulijieecologicalurbandesignsetsurbanfloodingmanagementasthekeyfunctionofecologicalinfrastructuralsystem,andintegratesrainwatermanagement,waterpurification,lifesanctuaryprotection,andgreentransportsystemswithathree-levelcorridorsystem.Itformsthebasicstructureoftheecologicalcity,andcreatesalowmaintenance,lowtechnique,lowcarbon,climatechangeadaptive,livablecity.[Keywords]Ecologicalinfrastructure,Greyinfrastructure,Ecologicalcity,Urbandesign272829