Stormwater Quality Design Manual (May 2007) - City of Sacramento ...

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Technical RequirementsVegetated SwaleSWALE LENGTHSUFFICIENT TO PROVIDE MINIMUM CONTACT TIME OF 7 MINUTESINLETRIPRAP ENERGY DISSIPATORFLOW SPEADER FORCONCENTRATED FLOWSACHECK DAMFOR SLOPES > 2.5%OUTLETATRAPEZOIDAL VEGETATED SWALE – PLANNOT TO SCALEGRASS HEIGHT4" TO 6"DEPTH OF FLOW AT WQF< HEIGHT OF GRASS13 (MINIMUM)6" SANDY LOAM TOP SOIL6" SANDIMPERMEABLE LINER(IF REQUIRED TO PREVENTINFILTRATIONBOTTOM WIDTH4" PERFORATED PIPE UNDERDRAININ 9 " COARSE AGGREAGATE (AASHTO #8)REQUIRED FOR SLOPES < 1%USE GEOEXTTILE FABRIC AROUND PIPEAND GRAVELTRAPEZOIDAL VEGETATED SWALE – SECTIONNOT TO SCALEADAPTED FROM URBAN STORM DRAIN CRITERIA MANUALVOL. 3 - BEST MANAGEMENT PRACTICES,URBAN DRAINAGE AND FLOOD CONTROL DISTRICT,11/99Figure VS-1. Vegetated SwaleStormwater Quality Design Manual for the Sacramento and South Placer RegionsMay 2007VS-7
Technical RequirementsVegetated SwaleTable VS-3. Design Data Summary Sheet for Vegetated SwaleDesigner:Company:Project:Location:Date:1. Design Flow: WQF = I x C x Aa. I = Design Intensity = 0.18 in/hrb. C = Runoff Coefficientc. A = Tributary area2. Swale Geometrya. Swale Bottom Width (b)b. Side slope (Z)WQF =I =C =A =b =Z =cfsin/hracresft3. Depth of flow (d) at WQF (3”-5” with Manning’s n= 0.20) d = in4. Design Slopea. s = 1% minimum without underdrains; 4% maximum withoutgrade controlsb. Number of grade controls requireds = %(number)5. Design flow velocity (Manning’s n= 0.20) V = ft/sec6. Contact Time (t c = 7 minutes minimum) t c = minutes7. Design LengthL = (t c ) x (flow velocity) x 60 L = ft8. Vegetation (describe)9. Outflow Collection (Check type used or describe “Other”) Grated Inlet Infiltration Trench Underdrain Used OtherNotes:Stormwater Quality Design Manual for the Sacramento and South Placer RegionsVS-8 May 2007
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Stormwater Quality Design Manualfor
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Stormwater Quality Design Manual wa
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Table of contentsOutdoor Work Areas
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Table of contentsSF-1.SF-2.SF-3.SF-
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Other Development Community Reviewe
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1 IntroductionPurposeThis Stormwate
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IntroductionIn July 2003, the permi
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IntroductionFor redevelopment proje
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Introduction• The Appendices prov
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2 An Integrated Approach toEffectiv
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Integrated ApproachIt is also helpf
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Integrated ApproachPut landscaping
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Integrated Approachfactors will be
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Chapter 3Figure 3-1. Process for Ad
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Chapter 3runoff reduction first (ev
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Chapter 3As the name implies (and a
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Chapter 3Step 9: Establish Long Ter
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Chapter 4Source Control Fact Sheets
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Source Control Measure Fact SheetSt
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Source Control Measure Fact SheetFu
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Source Control Measure Fact SheetLo
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Source Control Measure Fact SheetOu
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Source Control Measure Fact SheetOu
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Source Control Measure Fact SheetWa
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Source Control Measure Fact SheetWa
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5 Runoff Reduction Control Measures
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Runoff Reduction Control MeasuresDe
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Runoff Reduction Control Measures
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Runoff Reduction Control Measure Fa
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Runoff Reduction Fact SheetDisconne
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Chapter 6• What are pollutants of
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Chapter 6For projects using any of
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Runoff Treatment Control Measure Fa
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Design Data Summary SheetConstructe
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Page 131 and 132: Runoff Treatment Control Measure Fa
Page 141 and 142: Technical RequirementsInfiltration
Page 157 and 158: Technical RequirementsSand FilterSa
Page 159 and 160: Technical RequirementsSand FilterDe
Page 161 and 162: Technical RequirementsSand FilterDe
Page 163 and 164: Technical RequirementsSand FilterSt
Page 165 and 166: Technical RequirementsSand FilterTa
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Page 177 and 178: Technical RequirementsVegetated Swa
Page 179 and 180: Technical RequirementsVegetated Swa
Page 181: Technical RequirementsVegetated Swa
Page 191 and 192: Glossaryexposure of construction ma
Page 193 and 194: GlossaryLow Impact Development (LID
Page 195 and 196: GlossaryRegional Stormwater Quality
Page 197 and 198: Appendix ASubmittal RequirementsThe
Page 199 and 200: Sacramento County Supplemental Appl
Page 201: Example Post Construction Stormwate
Page 204 and 205: Typically maintenance agreements an
Page 206 and 207: Example Maintenance Covenant(Sacram
Page 208 and 209: Device in accordance with the maint
Page 210 and 211: [attach]DECLARANT’S ACKNOWLEGEMEN
Page 212 and 213: Recorded at the request of:CITY OF
Page 214 and 215: 9. The obligations herein undertake
Page 216 and 217: EXHIBIT B[Map/Illustration]
Page 218 and 219: City of FolsomThe City of Folsom ow
Page 220 and 221: Appendix D-1: Residential Sites: Ru
Page 222: Form D-1d: Alternative Driveway Des
Page 225 and 226: Form D-2a: Disconnected Pavement Wo
Page 228 and 229: Appendix D-3Runoff Reduction Credit
Page 230 and 231: These tables refer to runoff reduct
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Mature TreeShape Canopy (dia.) Heig
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Appendix D4LID Credits Background R
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unoff from the driveway by 60% whil
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The designer must determine how man
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Or the ASCE-WEF method (Sacramento)
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Table 3 - Multipliers Based on Rati
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Using the Effective Area Managed in
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SMRC, The Stormwater Manager’s Re
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Flow-based control measure design s
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4. Apply the Rational Formula to ca
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5. Enter the capture curve selected
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1.201.000.80STORAGE (in)0.600.4024-
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1.201.000.80STORAGE (in)0.600.4048
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Subject: VEGETATED SWALE EXAMPLEPLA
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PART II:Routing Excess Runoff throu
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4. Design the OutletThe outlet shou
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Exhibit 1Water Quality Orifice Outl
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3. Calculate Planter Surface Area A
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• Bottom slopes of 0.01 to 0.05%
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Appendix HDrainage Design and Storm
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