Transcription of Criteria for Detention Facility Design - New York City
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Criteria for Detention Facility Design - New York City
0 Criteria for Detention Facility Design Criteria FOR Detention Facility Design Bureau of Water & Sewer Operations Revised November 19, 2012 For more information contact: 718-595-4325 or Contents Criteria .. 1 I. Detention Facilities with a variable outflow .. 3 II. Detention Facilities within an approximately constant outflow .. 4 III. Weighted effective runoff coefficient for series Detention systems .. 5 IV. Maximum storage depth with an orifice tube outlet .. 6 General .. 8 Example 9 Example Example Example Stormflow Calculations ..13 Sample 1 ..14 Sample 2 ..15 1 Criteria for Detention Facility Design Criteria The following procedure is to be used to compute the total site developed storm flow in cubic feet per second (cfs), QDEV , the Allowable Flow in cfs, QALL , the Detention Facility maximum release rate in cfs, QDRR , the required Detention Facility volume in cubic feet (ft3), VR , and the Detention Facility maximum storage depth in feet, (ft.)
4 Criteria for Detention Facility Design 2. Compute the maximum required detention volume in ft3 with outflow controlled by an orifice tube or by controlled flow roof drains, V V, by the equation: 3. For roof detention compute the duration of the storm in minutes with a 10 yr. return frequency,
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