#INFOSEWER

Default Values and Units in InfoSewer SA and InfoSewer

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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