Runoff%20in%20MIKE-SWMM

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Runoff in MIKE-SWMM

• Melissa Figurski

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Subroutine Schematic
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Surface Flow Routing Elements

• Subcatchment (overland flow)
• Channel (trapezoidal/parabolic channel flow)
• Pipe (circular channel flow)
• Control Structures (weirs and orifices)

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Discretization

• Mathematical abstraction of the physical
  drainage system
• Turn basin into rectangles
• Fine vs. Coarse Discretization

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Discretization
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Subcatchment Overview

• Discretize basin into subcatchments
• Calculate runoff from each subcatchment
• Combine outflow from each subcatchment for total
  runoff

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Subcatchment Subareas
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Non-linear Reservoir
d2 d1
i WCON d1 0.5(d2 d1) dp/5/3
Dt
1.49 W S1/2
WCON
A n
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Reference

• Storm Water Management Model
• Version 4, Users Manual.
• Section 4 Runoff Block,
• Appendix VI