Storage Units in InfoSWMM and SWMM5

Storage Units in InfoSWMM and SWMM5

Storage Units are drainage system nodes that provide storage volume. Physically they could represent storage facilities as small as a catchbasin or as large as a lake. The volumetric properties of a storage unit are described by a function or table of surface area versus height.

The principal input parameters for storage units include:

  • Invert elevation
  • Maximum water depth
  • Initial water depth
  • Depth-surface area data
  • External inflow data.
  • Infiltration Parameters (optional)

Computed output consists of

  • Water depth
  • Hydraulic head
  • External inflow rate
  • Overflow rate
  • Concentration of each water quality constituent.


Excerpt from the EPA manual Storm Water Management Model Reference Manual Volume II – Hydraulics (PDF)


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