Skip to Main Content

SWMM model uses a variety of methods to simulate surface infiltration, and the Horton infiltration model is generally used for urban areas (Rui et al. 2015), in which the maximum infiltration rate was set to 19.71 mm/min. The minimum infiltration rate was set to 0.50 mm/min. The attenuation constant was 4 h−1, and the Manning coefficients of permeable paving, impermeable paving, shared green space, and rainwater pipes were set to 0.4, 0.014, 0.6, and 0.013, respectively, according to the SWMM user manual. All other parameters are set according to the current situation and relevant specifications, and the specific parameters of LID facilities are listed in Tables 4,56–7.

Table 4

Parameter setting of sunken green space

SurfaceSoilWater storageCulvert
Water storage depth 200 mm Thickness 300 mm Thickness 700 mm Drainage factor 0 
Vegetation cover 0.15 Porosity 0.363 Porosity ratio 0.75 Drainage index 0 
Surface roughness coefficient 0.4 Water penetration capacity 0.24 Penetration rate 327 mm/h Culvert offset height 0 
Surface slope 0.3 Blight point 0.11 Clogging factor 0   
  Hydraulic conductivity 3.3 mm/h     
  The slope of hydraulic conductivity 10     
  Suction head 88.9     
SurfaceSoilWater storageCulvert
Water storage depth 200 mm Thickness 300 mm Thickness 700 mm Drainage factor 0 
Vegetation cover 0.15 Porosity 0.363 Porosity ratio 0.75 Drainage index 0 
Surface roughness coefficient 0.4 Water penetration capacity 0.24 Penetration rate 327 mm/h Culvert offset height 0 
Surface slope 0.3 Blight point 0.11 Clogging factor 0   
  Hydraulic conductivity 3.3 mm/h     
  The slope of hydraulic conductivity 10     
  Suction head 88.9     
View Large
Table 5

Parameter setting of bioretention ponds

SurfaceSoilWater storageCulvert
Water storage depth 300 mm Thickness 500 mm Thickness 700 mm Drainage factor 0 
Vegetation cover 0.6 Porosity 0.363 Porosity ratio 0.75 Drainage index 0 
Surface roughness coefficient 0.4 Water penetration capacity 0.24 Penetration rate 327 mm/h Culvert offset height 0 
Surface slope 0.5 Blight point 0.11 Clogging factor 0   
  Hydraulic conductivity 3.3 mm/h     
  The slope of hydraulic conductivity 10     
  Suction head 88.9     
SurfaceSoilWater storageCulvert
Water storage depth 300 mm Thickness 500 mm Thickness 700 mm Drainage factor 0 
Vegetation cover 0.6 Porosity 0.363 Porosity ratio 0.75 Drainage index 0 
Surface roughness coefficient 0.4 Water penetration capacity 0.24 Penetration rate 327 mm/h Culvert offset height 0 
Surface slope 0.5 Blight point 0.11 Clogging factor 0   
  Hydraulic conductivity 3.3 mm/h     
  The slope of hydraulic conductivity 10     
  Suction head 88.9     
View Large
Table 6

Parameter setting of infiltration pond

SurfaceWater storageCulvert
Water storage depth 600 mm Thickness 300 mm Drainage factor 0 
Vegetation cover 0.15 Porosity ratio 0.75 Drainage index 0 
Surface roughness coefficient 0.4 Penetration rate 532 mm/h Culvert offset height 0 
Surface slope 0.3 Clogging factor 0   
SurfaceWater storageCulvert
Water storage depth 600 mm Thickness 300 mm Drainage factor 0 
Vegetation cover 0.15 Porosity ratio 0.75 Drainage index 0 
Surface roughness coefficient 0.4 Penetration rate 532 mm/h Culvert offset height 0 
Surface slope 0.3 Clogging factor 0   
View Large
Table 7

Parameter setting of the reservoir

Barrel heightOffsetFlow exponent
1,000 mm 120 mm 0.5 
Barrel heightOffsetFlow exponent
1,000 mm 120 mm 0.5 
View Large

Close Modal
This Feature Is Available To Subscribers Only

or Create an Account

Close Modal
Close Modal
This site uses cookies. By continuing to use our website, you are agreeing to our privacy policy.
Accept