Calculations and Methodology - Semcog

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Channel Protection Criteria • Bankfull condition responsible for shaping of channel • Match post construction runoff volume <strong>and</strong> rate to presettlement conditions up to bankfull
Channel Protection Criteria • LID site design based on no increase of presettlement runoff condition for all storms up to the 2-year, 24-hr return frequency – 95% of annual rainfall volume
Page 1 and 2: Calculations and Methodology Scott
Page 3 and 4: Implementing a Community Stormwater
Page 5: LID Design Criteria • Groundwater
Page 9 and 10: Waivers to Channel Protection Crite
Page 11 and 12: Flood Protection Criteria • Maint
Page 13 and 14: Groundwater Recharge Criteria • E
Page 15 and 16: Water Quality Criteria • Quantita
Page 17 and 18: Other Water Quality Issues • Solu
Page 19 and 20: Nonstructural BMPs • Protected pr
Page 21: Stormwater Credits • Credited BMP
Page 24 and 25: Calculating Runoff • Runoff volum
Page 26 and 27: Peak Rate / Hydrograph Estimations
Page 28 and 29: Calculating Peak Rate By Utilizing
Page 30 and 31: Design Calculation Process Step 1:
Page 32 and 33: Design Calculation Process Step 6:
Page 34 and 35: Step 2: Map Existing Features
Page 36 and 37: Step 4: Determine Disturbed Area Si
Page 38 and 39: Step 6: Select volume control BMPs
Page 40 and 41: Step 8: Calculate Peak Rate Control
Page 42 and 43: Example for Calculating LID BMP Pea

Calculations and Methodology - Semcog

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