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Lid Controls in SWMM 5.0.022

 

The ability to model Low Impact Development (LID) is a new feature created by the EPA in SWMM 5.0.022.   This discussion will list various features in LID modeling.

 

 

 

 

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  • ?ui=2&ik=60d08093d9&view=att&th=12d47a197b3b12f2&attid=0.1&disp=emb&zw
    Subject:  Rain Barrel LID Drain Outflow in SWMM 5.0.021
     The drain outflow in a Rain Barrel LID is defined by the user defined drain coefficient and drain exponent and the simulation storage depth  The storage outflow does not occur until it has been dry for at least the drain delay time in hours.
    LID_RB_5.png
    Figure 1.  Storage Outflow or Drain Outflow for a Rain Barrel LID

    LID_RB_4.png
    Figure 2. You can see the effect of the Drain Delay in the output file for LID Simulation.

  • ?ui=2&ik=60d08093d9&view=att&th=12d44ae6ef58e2f8&attid=0.1&disp=emb&zw
    Subject:  Rain Barrel LID Storage Depth in SWMM 5.0.021

    The storage depth in a Rain Barrel LID is limited by the user defined maximum rain barrel height in inches or millimeters.  A rain barrel is one of the new LID features in SWMM 5.0.021
    LID_RB_1.png?width=640
    Figure 1.  Storage Depth in a Rain Barrel LID
  • A LID Process consists of five structured components or layers:

     

    1.Drain
    2.Storage
    3.Soil
    4.Pavement
    5.Surface 

     

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