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CE 3372 Water Systems Design
Introduction to SWMM
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SWMM
• Storm Water Management Model – Originally created by University of Florida in the
1970’s – V1-4 are FORTRAN – V5 re-factored into C++
• The computation engine is mature and is part of– MIKE URBAN– SOBEK– XP-SWMM– CivilStorm
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SWMM
• Started as a simplified hydraulic model, evolved into an integrated hydrology-hydraulics model– Pretty useful in urban settings
• Used for BMP performance estimation• Used for LID performance estimation
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Download and Install
• Google “EPA-SWMM” to find the software
• Download the self-extracting archive
• Download the user manual
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Tour of the Interface
• Nodes and Links• Outfall• Sub-catchment and Raingages• Date/Time• Hydraulics
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Example 1
• Flow in an open channel– Steady (normal)– Unsteady (abnormal)
• Cross sections• Invert Elevations• Offsets
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Example 2
• Flow in a sewer pipe– Steady (normal)– Unsteady (abnormal)
• Invert Elevations• Offsets
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Example 3
• Flow through a storage element