Project Description. Project Options. End Analysis On... Apr 26, :00:00. Rainfall Details

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1 Project Description File Name Att Pond 3 East PIPES ONLY.SPF Project Options Flow Units... Elevation Type... Hydrology Method... EPA SWMM Infiltration Method... Link Routing Method... Enable Overflow Ponding at Nodes... Skip Steady State Analysis Time Periods... Analysis Options CMS Elevation EPA SWMM SCS Curve Number Hydrodynamic YES NO Start Analysis On... Apr 25, :00:00 End Analysis On... Apr 26, :00:00 Start Reporting On... Apr 25, :00:00 Antecedent Dry Days... 0 days Runoff (Dry Weather) Time Step :00:10 days hh:mm:ss Runoff (Wet Weather) Time Step :00:10 days hh:mm:ss Reporting Time Step :00:10 days hh:mm:ss Routing Time Step seconds Rainfall Details SN Rain Gage Data Data Source Rainfall Rain State County Return Rainfall Rainfall ID Source ID Type Units Period Depth Distribution (years) (mm) 1 Time Series 50yr RI Cumulative mm None None South Africa 24-hr, Type 2 Page 1 of 7

2 Subbasin Hydrology Subbasin : Post-Attenuation Area (ha) Impervious Area (%) Conductivity (mm/hr) Drying Time (days) Average Slope (%) Equivalent Width (m) Impervious Area Manning's Roughness Pervious Area Manning's Roughness Curb & Gutter Length (m) Rain Gage ID Wellington Composite Curve Number Area Soil Curve Soil/Surface Description (ha) Group Number Paved roads with curbs & sewers 3.06 C % grass cover, Fair C Urban commercial, 85% imp 6.65 C Composite Area & Weighted CN Subbasin Runoff Results Total Rainfall (mm) Total Runon (mm) Total Evaporation (mm) Total Infiltration (mm) Total Runoff (mm) Peak Runoff (cms) Time of Concentration (days hh:mm:ss) :45:24 Page 2 of 7

3 Subbasin : Post-Development Area (ha) Impervious Area (%) Conductivity (mm/hr) Drying Time (days) Average Slope (%) Equivalent Width (m) Impervious Area Manning's Roughness Pervious Area Manning's Roughness Curb & Gutter Length (m) Rain Gage ID Wellington Composite Curve Number Area Soil Curve Soil/Surface Description (ha) Group Number Urban commercial, 85% imp 6.65 C Paved roads with curbs & sewers 3.06 C % grass cover, Fair C Composite Area & Weighted CN Subbasin Runoff Results Total Rainfall (mm) Total Runon (mm) Total Evaporation (mm) Total Infiltration (mm) Total Runoff (mm) Peak Runoff (cms) Time of Concentration (days hh:mm:ss) :45:24 Page 3 of 7

4 Subbasin : Pre-Development Area (ha) Impervious Area (%) Weighted Curve Number Conductivity (mm/hr) Drying Time (days) Average Slope (%) Equivalent Width (m) Impervious Area Manning's Roughness Pervious Area Manning's Roughness Curb & Gutter Length (m) Rain Gage ID Wellington Composite Curve Number Area Soil Curve Soil/Surface Description (ha) Group Number 50-75% grass cover, Fair C Composite Area & Weighted CN Subbasin Runoff Results Total Rainfall (mm) Total Runon (mm) Total Evaporation (mm) Total Infiltration (mm) Total Runoff (mm) Peak Runoff (cms) Weighted Curve Number Time of Concentration (days hh:mm:ss) :30:55 Page 4 of 7

5 Storage Nodes Storage Node : Attenuation Chamber Invert Elevation (m) Max (Rim) Elevation (m) Max (Rim) Offset (m) Initial Water Elevation (m) Initial Water Depth (m) Ponded Area (m²) Evaporation Loss Storage Area Volume Curves Storage Curve : POND Stage Storage Storage Area Volume (m) (m²) (m³) Page 5 of 7

6 Page 6 of 7

7 Storage Node : Attenuation Chamber (continued) Outflow Weirs SN Element Weir Flap Crest Crest Length Weir Total Discharge ID Type Gate Elevation Offset Height Coefficient (m) (m) (m) (m) 1 Overflow Weir Rectangular No Outflow Orifices SN Element Orifice Orifice Flap Circular Rectangular Rectangular Orifice Orifice ID Type Shape Gate Orifice Orifice Orifice Invert Coefficient Diameter Height Width Elevation (mm) (mm) (mm) (m) 1 25yr Orifice Side CIRCULAR No yr Orifice Side CIRCULAR No Output Summary Results Peak Inflow (cms) Peak Lateral Inflow (cms) Peak Outflow (cms) Peak Exfiltration Flow Rate (cmm) Max HGL Elevation Attained (m) Max HGL Depth Attained (m) Average HGL Elevation Attained (m) Average HGL Depth Attained (m) Time of Max HGL Occurrence (days hh:mm) :30 Total Exfiltration Volume (1000-m³) Total Flooded Volume (ha-mm)... 0 Total Time Flooded (min)... 0 Total Retention Time (sec) Page 7 of 7

******************* Project Description ******************* File Name... NAAF Stormwater Improvement Project 11_21_2014.SPF

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