VOSWMM

Pavement

OTTHYMO object VOSWMM object
Pavement
Storage Unit with a Pump followed by an Outfall, a Weir and if applicable another Pump. The Storage Unit is used to model the main structure of Pavement. The first Pump and the followed Outfall are used to model the infiltration from the Pavement. The Weir is added to model the Overflow. The Type of the Weir is Transverse and the Height and Width of Weir use the default value 1 as in VOSWMM. Users should check these settings and make adjustment if needed. If the Pavement has Underdrain modeled, another Pump is added to model the Underdrain.
  • Pavement does not have Underdrain
  • Pavement has Underdrain

The parameters of VOSWMM Storage Unit are assigned as:

  • NHYD = Pavement NHYD
  • Name = Pavement Name
  • Full Depth = Pavement.SurfacePondingLayer.DepthAreaCurve.lastCellOfStageColumn + Pavement.StorageLayer.Height
  • Storage Curve = Tabular
  • Storage Curve Table
    Depth Area
    0 Pavement.StorageLayer.Width x Pavement.StorageLayer.Length x Pavement.StorageLayer.Porosity
    Pavement.StorageLayer.Height Pavement.StorageLayer.Width x Pavement.StorageLayer.Length x Pavement.StorageLayer.Porosity
    Pavement.StorageLayer.Height Pavement.SurfacePondingLayer.DepthAreaCurve.Area(1)
    Pavement.SurfacePondingLayer.DepthAreaCurve.Stage(2)
    + Pavement.StorageLayer.Height
    		 Pavement.SurfacePondingLayer.DepthAreaCurve.Area(2)
    … …
    Pavement.SurfacePondingLayer.DepthAreaCurve.Stage(n)
    + Pavement.StorageLayer.Height
    		 Pavement.SurfacePondingLayer.DepthAreaCurve.Area(n)

The parameters of VOSWMM Pump used for infiltration are assigned as:

  • NHYD = Pavement-NHYD[x]-Infil, where x is the NHYD of the Pavement
  • Name = Pavement-NHYD[x]-Infil, where x is the NHYD of the Pavement
  • Pump curve
    The same method as infiltration and evapotranspiration modeling of Wetland Conversion will be used to define the curve table, time-series data and control rule.
    • Curve type = TYPE4
    • Curve Name = Pavement-NHYD[x]-Infil, where x is the NHYD of the Pavement
  • Other parameters keep as default as in VOSWMM.

The parameters of VOSWMM Outfall used for infiltration:

  • Use the default values as in VOSWMM.

The parameters of VOSWMM Weir used for overflow are assigned as:

  • NHYD: Pavement-NHYD[x]-Overflow, where x is the NHYD of the Pavement
  • Name: Pavement-NHYD[x]-Overflow, where x is the NHYD of the Pavement
  • Type = Transverse
  • Flap Gate = Yes
  • Can Surcharge = Yes
  • Other parameters keep as default as in VOSWMM.

The parameters of VOSWMM Pump used for underdrain, if applicable, are assigned as:

  • NHYD: Pavement-NHYD[x]-Underdrain, where x is the NHYD of the Pavement
  • Name: Pavement-NHYD[x]-Underdrain, where x is the NHYD of the Pavement
  • Pump curve
    • Curve type = TYPE4
    • Curve name = Pavement-NHYD[x]-Underdrain, where x is the NHYD of the Pavement
    • Curve Table = Pavement Underdrain Discharge Curve