cee5734_week7_2011

# cee5734_week7_2011 - CEE 5734 Urban Hydrology and...

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Glenn E. Moglen Department of Civil & Environmental Engineering Virginia Tech Introduction to the EPA SWMM Model CEE 5734 – Urban Hydrology and Stormwater Management Week 7

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Questions Brief Discussion about 2-stage riser, modeling of orifice Today – Introduction EPA SWMM Model Break from lecture a little early for discussion of Mid-term exam format, allowances/restrictions Today’s Agenda
Condition: h < z 1 Applicable Equation: N/A Q = 0 Modeling of An Orifice on a Two- Stage Riser L h stage z = 0 z = z 1 z = z 2

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Condition: z 1 < h < z 2 Applicable Equation: weir Modeling of An Orifice on a Two- Stage Riser L stage h z = 0 z = z 1 z = z 2 5 . 1 1 ) ( z h L C Q w - =
Modeling of An Orifice on a Two- Stage Riser L h z = 0 z = z 1 z = z 2 Condition: h = z 2 - Applicable Equation: weir 5 . 1 1 ) ( z h L C Q w - = stage

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Condition: stage = z 2 + Applicable Equation: orifice Modeling of An Orifice on a Two- Stage Riser L z = 0 z = z 1 z = z 2 * 2 gh A C Q o = h * stage Note that h * is now measured from water surface to centroid of orifice
Condition: stage > z 2 Applicable Equation: orifice Modeling of An Orifice on a Two- Stage Riser L h * stage z = 0 z = z 1 z = z 2 * 2 gh A C Q o = Note that h * is now measured from water surface to centroid of orifice

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weir? maximum
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## This note was uploaded on 12/24/2011 for the course CEE 5734 taught by Professor Moglen during the Spring '11 term at Virginia Tech.

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cee5734_week7_2011 - CEE 5734 Urban Hydrology and...

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