The Sponge City TheoryClass-11 3150657 ZHAO YiningTutor: SUN YingContentsThe background of the raise of “Sponge city theory1Connotation of Sponge city theory2Measures3BackgroundvUrban ecological condition in our country is faced with all kinds of serious problems such as water shortage, water pollution, flooding and aquatic habitat degradation and so on.Connotationv“Sponge city” is a new conception of management about urban rain and flood, which refers to flexibility to environment changes and natural disasters brought by the rain.ContrastCreate natureFocus on use of land resourcesChange intrinsic environment Extensive developmentSurface runoff increasedConform to natureHarmonious coexistence of human and natureProtect intrinsic environment Low impact developmentSurface runoff unchangedTraditional CitySponge City The Water Cycle DiagramComprehensive treatment measures about rivers.Build retaining dam, check dam, ecological slope and wetland park.Build decentralized waste-water treatment facilities and sewage treatment plants.Implement the park renova-tion project.Improve the ability of moun-tain park on permeability and water storage.Set subsided green space, water permeability pavement and green roof.Accelerate the transformation of underground water pipeline network and reduce the loss of water supply.Rainwater GardenRoadway runoffGrass space runoffTranspirationRoof drainageFiltration permeatingTransient storageRainwater GardenDonald Creek ParkGreen RoofVegetation layerPlanting layerFilter layerWater storage and drainage layerMoisturizing layerSpacer layerAntiseep layerOriginal building roofGreen RoofGreen roof around the worldThank You !