Default Values and Units in InfoSewer SA and InfoSewer
The following tables summarize the default values used by InfoSewer SA Pro in lieu of user-supplied values and units. Table 2.1 lists default parameter values while Table 2.2 lists input parameter units.
“Flow units” in the second table can correspond to either cubic feet per second (the default), gallons per minute (gpm), million gallons per day (mgd), imperial million gallons per day (imgd), acre-feet per day (afd), cubic meters per hour (cmh), cubic meters per day (cmd), million liters per day (mld), liters per second (lps), or liters per minute (lpm).
Table 2.1 – Summary of Default Parameter Values
| Parameter | Default Value |
| Maximum Design Velocity | 10 ft/s |
| Minimum Design Velocity | 2 ft/s |
| Particle Settling Velocity | 0.1 ft/s |
| Limiting Flow Velocity | 2 ft/s |
| Reaction Rate Coefficient | 0.23/day |
| Temperature | 20oC |
| pH | 7.0 |
| Sulfide Flux Coefficient | 0.00032m/hr |
| Sulfide Loss Coefficient | 0.96 |
| Ionization Constant | 6.92 |
| Soluble Form of Total Sulfide | 85 % |
| Relative Saturation of H2S | 0.05 |
| Acid Reaction Efficiency | 0.5 |
| Alkalinity | 0.5 |
| Time Pattern Multipliers | 1 for all patterns |
| Pattern Time Step | 1 hour |
| Pattern Start | 0 hour |
| Pattern Type | Continuous |
| Simulation Duration | 0 hour (steady-state) |
| Headloss Formula – Force Main
Headloss Formula – Gravity Main |
Hazen-Williams
Manning |
| Flow Units | CFS |
| Global Loading Multiplier | 1.0 |
| Peaking Factor , K (Federov Eq.) | 2.4 |
| Peaking Factor, p (Federov Eq.) | 0.89 |
| Peaking Parameter , a (Harman and Babbitt Eqs.) | 5.0 |
| Peaking Parameter, b (Harman and Babbitt Eqs.) | 0.0 |
| Peaking Parameter, c (Harman and Babbitt Eqs.) | 0.2 |
| Peaking Parameter, d (Harman and Babbitt Eqs.) | 0.0 |
| Design Manning Coefficient | 0.001 |
| Maximum Design Cover | 20 ft |
| Minimum Design Cover | 3 ft | |
| Angle of Excavation | 0 degrees | |
| Cutoff Diameter | 24 in | |
| Small Pipes Clearance | 8 in | |
| Large Pipes Clearance | 12 in | |
| Cutoff Depth | 10 ft | |
| Minorloss Crown Drop | 0.1 ft | |
| Maximum Allowable Diameter | 0 ft | |
| Minimum Travel Distance | 100 units | |
| Minimum Travel Time | 1 second | |
| Conserve Pumped Flows | No (Conserve Load Components) | |
| Flow Attenuation | No | |
| Manhole Sealing Method | Unlocked | |
| Max. Number of Segments | 100 | |
| Accuracy | .0001 | |
| Start Clocktime | 0 hours | |
| Report Time Step | 1 hour | |
| Pump Hydraulic Time Step | 6 minutes | |
| Quality | None | |
| Page Size (Lines per Report Page) | 0 (no limit) | |
| Manholes Reported On | Yes | |
| Links Reported On | Yes | |
| Report Status | Yes | |
| Minimum Time of Concentration | 10 minutes | |
| IDF Curve Duration Unit | Minutes |
| Minimum Time of Concentration | 10 minutes |
| IDF Curve Duration Unit | Minutes |
| Drainage Area | 0 acre |
| Unit Hydrograph Pattern Type | Explicit |
| Enable Storm Runoff Computation | No |
| Maximum Crown Drop at Manhole | 3 ft |
| Manhole Invert Offset | 0 ft |
Table 2.2 – Units of Measurement
| Parameter | US Customary Units | SI (Metric) Units |
| Flow | CFS (cubic feet /sec)
GPM (gallons / min) MGD (million gallon / day) IMGD (Imperial MGD) AFD (acre-feet / day) |
LPS (liters / sec)
LPM (liters / min) MLD (megaliters / day) CMH (cubic meters / hr) CMD (cubic meters / day) |
| Rim Elevation | Feet | Meters |
| Manhole Load | Flow units | Flow units |
| Manhole Diameter | Feet | Meters |
| Particle Settling Velocity | Feet/sec | Meters/sec |
| Limiting Flow Velocity | Feet/sec | Meters/sec |
| Reaction Rate Coefficient | Day-1 | Day-1 |
| Temperature | oC | oC |
| Wet Well Bottom Elevation | Feet | Meters |
| Wet Well Levels | Feet above bottom | Meters above bottom |
| Wet Well Diameter | Feet | Meters |
| Wet Well Volume | Cubic feet | Cubic meters |
| Pipe Length | Feet | Meters |
| Quality/Manholes:
Concentration BOD Time of Concentration Source Trace Hydrogen Sulfide |
Milligrams/liter
Milligrams/liter Hours Percent Milligrams/liter |
Milligrams/liter
Milligrams/liter Hours Percent Milligrams/liter |
| Quality/Pipes:
Concentration BOD Time of Concentration Source Trace Sediment/Deposition Hydrogen Sulfide Corrosion Rate |
Milligrams/liter
Milligrams/liter Hours Percent Kilograms Milligrams/liter Inch/year |
Milligrams/liter
Milligrams/liter Hours Percent Kilograms Milligrams/liter mm/year |
| Stormwater Modeling:
Drainage Area Subwatershed Area Channel Length Rainfall Intensity for Hyetograph Rainfall Duration for Hyetograph Unit Hydrograph Ordinates Watershed Hydraulic Length Watershed Centroid Distance Impervious Retention Storage Pervious Retention Storage Infiltration Rate Horton’s Decay Constant Infiltration Regeneration Constant |
Acre
Acre Feet Inch/hour Minutes Flow Units Feet Feet Feet Feet Inch/hour Sec-1 None Feet Inch/hour Sec-1 None |
Square meters
Square meters Meters mm/hour Minutes Flow Units Meters Meters Millimeters Millimeters mm/hour Sec-1 None Millimeters mm/hour Sec-1 None |
| Pipe Diameter | Inches | Millimeters |
| Pipe/Channel Depth | Inches | Millimeters |
| Pipe/Channel Width | Inches | Millimeters |
| Pipe/Channel Side Slopes | None | None |
| Pipe Cover | Inches | Millimeters |
| Minorloss Crown Drop | Inches | Millimeters |
| Pipe Roughness
Hazen-Williams Manning |
None
None |
None
None |
| Pump Head | Feet | Meters |
| Pump Flow | Flow units | Flow units |
| Pump Speed Ratio | None | None |
| Pump Fixed Flow Capacity | Flow units | Flow Units |
| Angle of Excavation | Degrees | Degrees |
| Clearance | Inches | Millimeters |
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