Post 2014 Blogs

Here is a graphical view of the nonlinear runoff processes in InfoSWMM and SWMM5:
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1. Three runoff surfaces
a. Impervious with Depression Storage
b. Pervious
c. Impervious without Depression Storage
2. Evaporation
a. Constant
b. Time Series
c. Monthly
d. Temperature
e. Climate File
f. Monthly Adjustments for Climate Change
3. Slope (same for all runoff surfaces)
4. Infiltration
a. Horton
b. Modified Horton
c. Green Ampt
d. Modified Green Ampt
e. Curve Number or SCS or CN
f. Monthly Adjustments for Climate Change for all Infiltration Methods
5. Roughness (Manning’s n)
a. Impervious
b. Pervious
6. Width or the Dimension of the Subcatchment (same for all runoff surfaces)
7. Wind Speed for Snowmelt
a. Climate File
b. Time Series
8. Depression Storage
a. Impervious
b. Pervious
9. Temperature for Snowmelt
a. Climate File
b. Time Series
c. Monthly Adjustments for Climate Change
10. Other connected processes
a. LID Controls
b. Groundwater
c. Snowmelt
d. Water Quality
11. Outlet
a. Node
b. Pervious Runoff Surface
c. Impervious Runoff Surface
d. Another Subcatchment
e. LID Controls
  1. i. Rain Garden
  2. ii. Green Roofs
  3. iii. Porous or Permeable Pavements
  4. iv. Bio Retention Cells
  5. v. Infiltration Trench
  6. vi. Vegetative Swales
  7. vii. Rain Barrel
  8. viii. Rooftop Disconnection
12. Rainfall
a. Design Storms
b. Historical Storms
c. Long term NWS data or a Climate File
d. User Time Series
e. Monthly Adjustments for Climate Change
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