Units Key
This topic contains a list of all the display units available in InfoWorks ICM. There are three builtin sets of display units:
 Metric (Native)  InfoWorks ICM data is always stored in the Master Database using InfoWorks ICM native units
 MGD  used in the US for referring to flow in Mega Gallons per Day (MGD). Mainly used in sanitary and combined sewer modelling
 FT3 (Cubic Feet)  used in the US for referring to flow in cubic feet per second (cfs). Mainly used in storm water and water modelling
You can also set up your own preferred display format by setting the display units for individual data types. See Changing the Display Units for information on how to display data in your preferred format.
Unit Grid Key
The table below describes the structure of the Unit Types table, and explains what each of the columns contains.
Column 
Description 


Code 
The unit code used internally by InfoWorks ICM. The Code column contains the data type codes seen in the Network Data Fields topics. 

Field Name 
A description of the unit 

Unit 
The units used for the InfoWorks ICM Native Units system 

MGD/FT3 
The units used for the builtin MGD or FT3 units system 

Help Text 
This column contains a more detailed description of the unit. If additional units are available for the field, these are listed in the help text section. The columns in this grid contain the following details

Available Unit Types
Please note that some unit types listed below may not apply to your specific software product.
Code 
Field Name 
Unit 
MGD 
FT3 
Help Text 


A  Electric Current  A  A  A 
Applicable to Asset Networks Unit of electric current 

ANGLE 
Angle 
degree 
degree 
degree 
Applicable to Model Networks General unit of angle


ANGLER  Angle (Results)  radians  radians  radians 
Applicable to Model Networks Unit of angle for results


ANGLEV  Angular velocity  degree/s  degree/s  degree/s 
Applicable to Model Networks Unit of angular velocity


BOS  Bridge opening size  m  ft  ft 
Applicable to Model Networks Used for all measurements of bridge opening size


CA 
Catchment area 
ha 
acre 
acre 
Applicable to Model Networks Unit of area applied specifically to catchments


CAMS_PS 
Pipe size 
mm 
in 
in 
Applicable to Asset Networks Used for all measurements of pipe size


CC  Coliforms concentration  cfu/100ml  MPN/100ml  MPN/100ml 
Applicable to Model Networks Concentration of coliforms 

CED  Coliforms Exponential Decay  1/(cfu/100ml)  1/(MPN/100ml)  1/(MPN/100ml) 
Applicable to Model Networks Exponential decay for coliforms 

CF 
Temperature 
degree C 
degree F 
degree F 
Applicable to Model Networks General unit of temperature


CFS  Coliform flow 
cfu*10^9/kg 
MPN*10^9/kg 
MPN*10^9/kg 
Applicable to Model Networks Coliform flow (results data) 

CI 
Conduit inflow 
m3/s/m 
MGD/ft 
ft3/s/ft 
Applicable to Model Networks From user defined defaults and calculated base flow based on pipe length


CMDR  Coliform Max Decay Rate  (cfu/100ml)/day  (MPN/100ml)/day  (MPN/100ml)/day 
Applicable to Model Network Maximum decay rate for coliforms 

COLOUR  Colour  Degree Hazen  Degree Hazen  Degree Hazen 
Applicable to Asset Networks. Unit of colour of water 

CONDUCTIVITY  Conductivity  micro Siemens/cm  micro Siemens/cm  micro Siemens/cm 
Applicable to Asset Networks. Unit of electric conductivity 

COST  Cost  £  $  $ 
Applicable to Model Networks Used for damage curves


COSTAREA  Cost per area  £/m2  $/ft2  $/ft2 
Applicable to Model Networks Used for damage curves relative to area


CP 
Coliform potency 
cfu*10^9/kg 
MPN*10^9/kg 
MPN*10^9/kg 
Applicable to Model Networks Relative mass of coliform attachment 

DENSITY  Density  kg/m3  kg/m3  kg/m3 
Applicable to Model Networks Unit of density 

DRPM  Change in speed  rpm/s  rpm/s  rpm/s 
Applicable to Model Networks Used for Real Time Control 

DC  Diff Coeff  m2/s  ft2/s  ft2/s 
Applicable to Model Networks Unit for diffusion coefficient 

DQ 
Change in Flow 
m3/s/s 
MGD/s 
ft3/s/s 
Applicable to Model Networks Used for Real Time Control


DR  Daily Rate  DR  DR  DR 
Applicable to Model Networks Unit for a daily rate 

DY 
Change in Depth 
m/s 
ft/s 
ft/s 
Applicable to Model Networks Used for Real Time Control


DZ 
Change in Level 
m/s 
ft/s 
ft/s 
Applicable to Model Networks Used for Real Time Control


ED  Exponential decay  1/(mg/l)  1/(mg/l)  1/(mg/l)  Applicable to Model Networks  
ERODERATE  Erosion rate  mm/hr  in/hr  in/hr 
Applicable to Model Networks


EV 
Evaporation 
mm/day 
in/day 
in/day 
Evaporation Rate


FRAC  Fraction  Fraction  Fraction  Fraction 
A unitless measurement between 01 used primarily for SWMM control inputs for weirs, pumps, outlets and orifices 

HEAD 
Head 
m 
ft 
ft 
Applicable to Asset Networks General unit of pressure relative to datum


HOURS  Time interval  hours  hours  hours 
Applicable to Model Networks Hydrograph interval


HR  Hourly rate  1/hour  1/hour  1/hour 
Applicable to Model Networks


HT  Heat Transfer  1/s  1/s  1/s  Applicable to Model Networks  
I  Infiltration  mm/hr  in/hr  in/hr 
Applicable to Model Networks Rate of infiltration


IF 
Infiltration flow 
m3/s/km2 
MGD/acre 
ft3/s/acre 
Applicable to Model Networks Ground surface infiltration


IN_C  Concentration  mg/l  mg/l  mg/l 
Applicable to Asset Networks General unit of concentration


IN_COL_IE  Coliforms (IE)  cfu/100ml  cfu/100ml  cfu/100ml 
Applicable to Model Networks Coliforms Intestinal Enterococci (IE) Counts of organisms per volume


IN_COL_EC  Coliforms (EC)  cfu/100ml  cfu/100ml  cfu/100ml 
Applicable to Model Networks Coliforms Escherichia Coli (EC) Counts of organisms per volume


IN_FLUSHTIME  Flush time  min  min  min 
Applicable to Distribution Asset Networks Time of flushing for hydrant test object 

IN_Q 
Flow (distribution) 
l/s 
US Mgal/day 
ft3/s 
Applicable to Distribution Asset Networks General unit of flow


IN_RAD  Radiation Dosage  mrem/year  in/year  in/year 
Applicable to Distribution Networks Used for measurements of radiation in water


L 
Length 
m 
ft 
ft 
General unit of length


M 
Mass 
kg 
kg 
kg 
Applicable to Model Networks General unit of mass 

MANH_DIM 
Manhole Dimensions 
mm 
in 
in 
Applicable to Asset Networks Used for various measures of manhole dimension, such as cover, shaft and chamber


MANH_Y 
Manhole Depths 
mm 
in 
in 
Applicable to Asset Networks Used for various vertical measures in a manhole, such as total depth, depth of silt and depth of flow


MC 
Mass conc 
mg/l 
mg/l 
mg/l 
Applicable to Model Networks Mass concentration 

MCSI 
Mass conc (result) 
kg/m3 
kg/m3 
kg/m3 
Applicable to Model Networks Mass concentration (results data)


MCU 
Mass conc 
Mass conc  Mass conc  Mass conc 
Applicable to Model Networks A unitless mass concentration mainly used in SWMM networks 

MDR  Maximum decay rate  (mg/l)/day  (mg/l)/day  (mg/l)/day  Applicable to Model Networks  
MF 
Mass flow 
g/s 
g/s 
g/s 
Applicable to Model Networks Mass flow 

MFSI 
Mass flow (result) 
kg/s 
kg/s 
kg/s 
Applicable to Model Networks Mass flow (results data)


MFU 
Mass flow 
Mass flow  Mass flow  Mass fow 
Applicable to Model Networks A unitless mass flow mainly used in SWMM networks 

MIN  Minutes  minutes  minutes  minutes 
Applicable to Model Networks Time measurement 

MOIST_DEF  Soil moisture deficit  Fraction  Fraction  Fraction 
Applicable to Model Networks Soil moisture deficit


NA 
Area 
m2 
ft2 
ft2 
General unit of area


PC 
Pollutant mg/l 
mg/l 
mg/l 
mg/l 
Applicable to Model Networks Pollutant quantifier  normally used for chemical constituents 

PCC 
Pollutant count/l 
#/l 
#/l 
#/l 
Applicable to Model Networks Pollutant quantifier  normally used for biological constituents 

PCU 
Pollutant ug/l 
ug/l 
ug/l 
ug/l 
Applicable to Model Networks Pollutant quantifier  normally used for chemical constituents 

PD 
Population density 
person/ha 
person/acre 
person/acre 
Applicable to Model Networks Population density


PDR 
UPM Pollutant Decay Rate 
1/day 
1/day 
1/day 
Applicable to Model Networks Used in nonconservative water quality modelling 

PP 
Pollutant potency 
kg/kg 
kg/kg 
kg/kg 
Applicable to Model Networks Relative mass of attachment 

Print layout  mm  in  in 
Used for measurements in print layouts


PS 
Pipe size 
mm 
in 
in 
Applicable to Model Networks Used for all measurements of pipe size


Q 
Flow 
m3/s 
MGD 
ft3/s 
General unit of flow


QD 
Daily flow 
l/day 
US gal/day 
ft3/day 
Applicable to Model Networks Consumption rate


QU 
UPM River Flow 
l/s 
l/s 
l/s 
Applicable to Model Networks River flow rate 

R 
Rainfall intensity 
mm/hour 
in/hour 
in/hour 
General measure of rainfall intensity  the depth of rainfall over a period of time


RCF 
Melt coefficient 
mm/hourC 
in/hourF 
in/hourF 
Applicable to Model Networks Used for snow melt coefficients in Snow Packs


RCW 
Roughness (CW) 
mm 
in 
in 
Applicable to Model Networks Colebrook White roughness


RD 
Rainfall depth 
mm 
in 
in 
Rainfall depth


RE  Reaeration  m/hr  ft/hr  ft/hr 
Applicable to Model Networks


RS  Rate  1/s  1/s  1/s 
Applicable to Model Networks Unit to express rate of state change for regulators 

RSD 
Sediment Depth (results) 
m 
ft 
ft 
Applicable to Model Networks Sediment Depth (results data)


S 
Gradient 
m/m 
% 
% 
General measure of gradient defined as a ratio of vertical to horizontal


SB 
Surface buildup 
kg/ha/day 
kg/ha/day 
kg/ha/day 
Applicable to Model Networks Washoff 

SC  Storage capacity  mm  in  in 
Applicable to Model Networks


SETTL  Settling rate (detrital C)  mm/s  ft/hour  ft/hour 
Applicable to Model Networks Detrital carbon settling velocity


SETVEL  Settling velocity (sediment)  m/hr  ft/hr  ft/hr 
Applicable to Model Networks Sediment settling velocity


SHEARSTRESS  Shear stress  N/m2  lbf/ft2  lbf/ft2 
Applicable to Model Networks


SM 
Surface mass 
kg/ha 
kg/ha 
kg/ha 
Applicable to Model Networks Washoff (InfoWorks) or Initial build up (SWMM) networks 

SR  Solar Radiation  W/m2  W/m2  W/m2  Applicable to Model Networks  
STORAGEVOL 
Storage Volume 
m3 
US Mgal 
ft3 
General unit of volume for storage


SW_WEIRCOEFF  SWMM weir coefficient  m^{1/2}/s  ft^{1/2}/s  ft^{1/2}/s 
Applicable to SWMM networks Weir discharge coefficient


SW_SWEIRCOEFF  SWMM side weir coefficient  m^{1/3}/s  ft^{1/3}/s  ft^{1/3}/s 
Applicable to SWMM networks Road and secondary discharge coefficient


TD  Time Days  days  days  days  Time interval  
TS 
Time 
s 
s 
s 
Time interval


TURBIDITY  Turbidity  NTU  NTU  NTU 
Applicable to Asset Networks General unit of turbidity 

UF  Force per unit Length  kN/m  lbf/ft  lbf/ft 
Applicable to Model Networks Force per unit of length


UQ  Unit Flow  m2/s  ft2/s  ft2/s 
Applicable to Model Networks Flow per unit of length


UHC  Unit Headloss Coefficient  1/m  1/ft  1/ft 
Applicable to Model Networks Headloss coefficient per unit of length 

V 
Velocity 
m/s 
ft/s 
ft/s 
General unit of velocity.


VI 
Viscosity 
m2/s 
ft2/s  ft2/s 
General unit of viscosity.


VO 
Volume 
m3 
US Mgal 
ft3 
General unit of volume


WN_AV 
Rotation speed 
rpm 
rpm 
rpm 
General unit of speed for pumps 

WN_COST 
Cost 
£ 
$ 
$ 
Applicable to Asset Networks General unit of cost 

WN_P 
Pressure 
m 
psi 
psi 
Applicable to Asset Networks General unit of pressure


WN_POW 
Power 
kW 
kW 
kW 
General unit of electrical power


WN_VO  Volume (Distribution)  Ml  US Mgal  ft3 
Applicable to Distribution Asset Networks General unit of volume


WQ_MPA  Mass per area  g/m2  lbm/ft2  lbm/ft2 
Applicable to Model Networks


WS 
Wind Speed 
km/hour 
mph 
mph 
Applicable to Model Networks General unit of wind speed


XY 
XY coordinate 
m 
ft 
ft 
Unit for all location coordinates


Y 
Depth 
m 
ft 
ft 
Measure of relative depth


Z 
Height above datum 
m AD 
ft AD 
ft AD 
Height above datum. Used with XY to define an exact position
