CWR4101: Stormwater Managment Chapter 10

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CWR4101 Stormwater Managment Chapter 10
Dr. Marty Wanielista 407.823.4144 wanielis_at_mail.uc
f.edu www.stormwater.ucf.edu http//classes.cecs.u
cf.edu/CWR4101/wanielista
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Detention Designs

• Inventory Equation
• Preserving the mass balance pages 386-399
• Need input hydrograph and stage storage Discharge
  Relationships
• Various controls exists for output shapes

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Retention Designs

• Off Line Retention pages 405-407
• Based on yearly removal given an inter-event
  dry period or the time for the system to recover.
• The time for the system to recover depends on
  infiltration rate.
• Swale Designs pages 407-410
• Based on geometric characteristics and
  infiltration rates
• Reuse REV curves pages 412-414
• Based on not discharged (yearly values)
• Reuse rate or average volume per day per year on
  the EIA
• EIA is the Effective Impervious Area CA

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Practical Design Considerations

• Design Storm
• Or simulations using time data
• Some considerations for the design storm
• Frequencies table 10.2, page 375
• Duration and Distribution with dimensionless mass
  curves and various durations
• Sewer designs Manning and Continuity Equations
• Intensity changes with time to inlet
• Minimum and Maximum Velocities
• Invert elevations

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Pollutant Mass Considerations

• Hydrograph
• Pollutograph
• Loadograph
• Mass concentration volume
• See pages 420-422
• See Figure 10.37

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End Stormwater Management, Chapter 10
Dr. Marty Wanielista 407.823.4144 wanielis_at_mail
.ucf.edu www.stormwater.ucf.edu http//classes.ce
cs.ucf.edu/CWR4101/wanielista