Link results data fields

All results fields are displayed on the results grid when opened while viewing a replay of a simulation, and on a special results page placed at the front of Property Sheets displayed while viewing a simulation replay.

Time varying results are shown with the field name in an alternate colour on the grid and property sheets. Non time varying results have the field name in the normal black type.

The table below displays link results applicable regardless of the type of simulation being run. For more information on the additional results available for special types of simulations, follow the links below:

• InfoWorks TS (Transient System) Link Results
• Water Quality - Turbidity Analysis Link Results

Note: Use the scroll bar at the bottom of the table to view its entire content.

Link Results Data Fields

Database Table: __IWR_Link

Field Name	Help Text	Units	Database Field
Reverse cost of water	The cost per cubic metre for water transferred from the To Node to the From Node	WN_COST	H2OCOSTR
Headloss per Unit Distance	Headloss divided by Pipe Length	WN_HLUD	_HeadlossPerUD
Max Headloss per Unit Distance	The maximum Headloss per Unit Distance value experienced during the simulation.	WN_HLUD	_HeadlssPerUD
Maximum Cost 2	Second monthly charge for Maximum Power used. Calculation of cost is similar to Monthly Cost of Max Power except kVA Time Interval and Max Power Demand Rate are defined in the Max Power Demand Rates 2 page of the Electricity Tariff. Pumping Station only.	WN_COST	MAXCOST2
Maximum Cost	Monthly charge for Maximum Power used, calculated as: PMAX / PF x Max Power Demand Rate Where: PMAX is the Maximum Averaged Electric Power (averaged over kVA Time Interval specified on the Max Power Demand Rates 1 page of the Electricity Tariff) PF is Power factor defined on the Pumping Station Parameters Page of the Pump Station Property Sheet Max Power Demand Rate is the cost defined on the Max Power Demand Rates 1 page of the Electricity Tariff Pumping Station only.	WN_COST	MAXCOST
Loss	Pump energy loss. Pumping Station only.	WN_EN	LOSS
Low Pressure	Lowest pressure experienced along pipe at timestep (t). The calculation of this result depends on whether the Advise on Hydraulic Transients option is switched on (see Simulation Options dialog): Transients Advisor High Pressure at timestep (t) OFF (default) Lower of connected node pressures at (t) ON Lower of connected node pressures (t) + Transient Pressure (t)	WN_P	LOPRESS
High Pressure	Highest pressure experienced along pipe at timestep (t). The calculation of this result depends on whether the Advise on Hydraulic Transients option is switched on (see Simulation Options dialog): Transients Advisor High Pressure at timestep (t) OFF (default) Higher of connected node pressures at (t) ON Higher of connected node pressures (t) + Transient Pressure (t)	WN_P	HIPRESS
Headloss	Difference in Head between upstream node and downstream node of pipe caused by friction	HEAD	HEADLOSS
Max Headloss	Maximum Headloss value experienced during simulation.	HEAD
Licensed Maximum Power	Licensed Maximum Power (specified on Pump Control Page of Pump Station Property Sheet). Maximum licensed power on the pumping station site (not the maximum installed power). Pumping Station only.	WN_POW	MAXPOWER
Head	Pumping head. Pumping Station only.	HEAD	HEAD
Maximum Pressure Criticality	Ratio of maximum pressure experienced in link during simulation to allowable working pressure calculated as: Maximum High Pressure at timestep (t) / Pressure Class Maximum Pressure Criticality will be zero if a pressure class has not been specified for the link.		MAXPRCRT
Forward cost of water	The cost per cubic metre for water transferred from the From Node to the To Node	WN_COST	H2OCOSTF
DW Friction Factor	Darcy Weisbach Friction Coefficient. See the Pipe Calculations topic for calculation details.		FRICTION
Flow	Volume of fluid that passes a point per unit time	WN_Q	FLOW
Max Flow	Maximum volume of fluid that passes a point per unit time. Note: For all pumping stations without a bypass, the maximum flow is displayed as 0.	WN_Q	MAXFLOW
Min Flow	Minimum volume of fluid that passes a point per unit time. Note: For all pumping stations without a bypass, the minimum flow is displayed as 0.	WN_Q	MINFLOW
Cumulative Flow	Total flow from start of simulation to present timestep (flow direction dependent).	WN_QCUM	CUMFLOW
Cumulative Sediment Status	The value for Cumulative Sediment Status over the whole simulation can be one of the following: Database Value Description Help Text 0 undefined The state was indeterminate throughout the run. 1 deposit Pipe carrying capacity was always below the Deposition Limit set in the Run. Sediment was being deposited throughout. 2 resuspension Pipe carrying capacity was always above the Suspension Limit set in the Run. Sediment was being eroded throughout. 3 transient Pipe carrying capacity was always between the Deposition Limit and the Suspension Limit set in the Run. No erosion or deposition occurred. 4 variable Pipe carrying capacity crossed one or more limits during the run, so that more than one of the above three states existed during the run.		CUMSEDST
Cumulative Cost	Total cost from start of simulation to present timestep. Pumping Station only.	WN_COST	CUMCOST
Cost	Cost due to daily rates charges. Pumping Station only.	WN_COST	COST
Cost of availability	Cost of Availability specified on Application Dates Page of Electricity Tariff. Pumping Station only.	WN_COST	AVCOST
Velocity	Distance travelled by fluid per unit time. For Pumping Stations, this is the velocity in the bypass pipe, if active.	V	_Velocity
Head Difference	Difference in Head between upstream node and downstream node of pipe	HEAD	HEADDIFF
Pressure	Pressure at downstream node of valve link. Valve only.	WN_P	PRESSURE
Max Velocity	Maximum velocity experienced in link during simulation. For Pumping Stations, this is the maximum velocity in the bypass pipe.	V	VMAX
Max Negative Velocity	Maximum negative (reverse) velocity experienced in link during simulation. If the flow in the link is never negative, this value will be zero.	V	VNEGMAX
Max Positive Velocity	Maximum positive (forward) velocity experienced in link during simulation. If the flow in the link is never positive, this value will be zero.	V	VPOSMAX
Variable Speed	Speed of pump (variable speed pumps only). Pumping Station only.	WN_AV	VARSPEED
Type	The value for Type identifies the type of link and can be one of the following: 1 Pipe link or Meter link 2 Pumping Station 3 Valve 4 Float Valve 5 Non Return Valve		TYPE
Transient Pressure Amplitude	Applicable to a simulation with Advise on Hydraulic Transients option switched on (see Simulation Options dialog). Transient pressure amplitude calculated as: dH = (c/g).dV where c = wave celerity g = acceleration due to gravity dV = change in velocity (between current timestep and previous timestep) See Transients Advisor for more information.	WN_P	TRANPRES
Electricity Tariff	Daily rates charge specified in Electricity Tariff on Daily Rates Page and Daily Rate Usage Page. Pumping Station only.	WN_DRATE	TARIFF
Status	The value for Status at each timestep can be one of the following: Database Value Description Help Text 0 - 1 closed The link is closed for the duration of the simulation. -1 temp closed The link is closed in the current timestep. 2 isolated The link is isolated from the network for the duration of the simulation. -2 temp isolated The link is isolated in the current timestep.		STATUS
State	The value for State at each timestep can be one of the following: 0 OFF 1 ON Pumping Station only.		STATE
Maximum High Pressure	Largest High Pressure experienced in link during simulation.	WN_P	MAXHIPRE
Reversals	A count of the number of times flow direction was reversed during the simulation		REVERSAL
Shear Stress	The applied hydraulic shear stress in the pipe	WN_STRESS	SHSTRESS
Maximum Shear Stress	The maximum shear stress experienced in the pipe during the simulation	WN_STRESS	SHSTRESSMAX
Min Velocity	Minimum velocity experienced in link during simulation For Pumping Stations this is the minimum velocity in the bypass pipe.	V	VMIN
Pressure Criticality	Ratio of pressure experienced in the link at time (t) to allowable working pressure calculated as: High Pressure at timestep (t) / Pressure Rating Pressure Criticality will be zero, if a pressure rating has not been specified for the link.		PRESCRIT
Electric Power	Electric Power used by pumps. Pumping Station only.	WN_POW	POWER
Pipe Carrying Capacity	Concentration of sediment that can be held within flow at the current timestep	WN_C	PCC
Opening	Percentage valve opening. If the valve is not a control valve, percentage opening will be 100%. Valve only.	WN_OPEN	OPENING
Number of Pumps	Number of pump units in pumping station. Pumping Station only.		NPUMP
Total pumps on	Number of pump units currently running in pumping station. Pumping Station only.		NPUMPSON
Mode	Valve: Operation Mode for a valve. If the valve is not a control valve, mode will be THV. Pumping Station: Mode of Control (specified on Pump Control Page of Pump Station Property Sheet) Mode will be one of the following: Database Value Description Help Text 0 - 1 FLOW,THV PST: Flow, VALVE: Throttled Valve 2 AUTO,PRV PST: AUTO, VALVE: Pressure Reducing Valve 3 PLAN,PSV PST: PLAN, VALVE: Pressure Sustaining Valve 4 PROF,PCV PST: PROFILE, VALVE: Pressure Controlled Valve 5 TCV Time Controlled Valve 6 FCV Flow Controlled Valve 7 FRV Flow Regulating Valve 8 PFV Pressure/Flow Valve 9 FMV Flow Modulated Valve 10 PRSV Pressure Reducing / Sustaining Valve 11 OCV Open/Closed Valve		MODE
Minimum Low Pressure	Smallest Low Pressure experienced in link during simulation.	WN_P	MINLOPRE
Percent Time Flow Forward	The percentage of time during the simulation that flow occurs in the forward direction, (from the From Node to the To Node), of the pipe.		PCTFLOWF
Percent Time Flow Reverse	The percentage of time during the simulation that flow occurs in the reverse direction, (from the To Node to the From Node), of the pipe.		PCTFLOWR
Maximum Transient Pressure	Applicable to a simulation with Advise on Hydraulic Transients option switched on (see Simulation Options dialog). Largest Transient Pressure experienced in link during simulation.	WN_P	MAXTRPRE
Sediment Status	The value for Sediment Status at each timestep can be one of the following: Database Value Description Help Text 0 undefined The current state is indeterminate. 1 deposit Sediment is being deposited because pipe carrying capacity is below the Deposition Limit set in the Run. 2 resuspension Sediment is being eroded because pipe carrying capacity is above the Suspension Limit set in the Run. 3 transient Pipe carrying capacity is between the Deposition Limit and the Suspension Limit set in the Run. No additional erosion or deposition is occurring.		SEDSTAT
Energy Loss	Applicable when carrying out Sustainability Analysis only. Daily rate of energy loss due to friction and minor losses. For pumping stations this is the loss in the bypass pipe, if active.	WN_EN_DY	SUSELOSS
Total Daily Energy Loss	Applicable when carrying out Sustainability Analysis only. Total daily energy loss due to friction and minor losses. For pumping stations this is the loss in the bypass pipe, if active.	WN_EN_DY	SUSTELSS
Daily Carbon Equivalent Loss	Applicable when carrying out Sustainability Analysis only. Daily rate of energy loss due to friction and minor losses expressed as a carbon dioxide equivalent. For pumping stations this is the loss in the bypass pipe, if active.	WN_GHG_DYMASS	SUSCELSS
Total Daily Carbon Equivalent Loss	Applicable when carrying out Sustainability Analysis only. Total daily energy loss due to friction and minor losses expressed as a carbon dioxide equivalent. For pumping stations this is the loss in the bypass pipe, if active.	WN_GHG_DYMASS	SUSTCELS
PST Energy	Energy used at Pump Station at current timestep Pumping Station only.	WN_EN	ENERGY
PST Total Energy	Total energy used at Pump Station during simulation. Pumping Station only.	WN_EN	TENERGY
PST CO2 Equivalent	Applicable when carrying out Sustainability Analysis only. Energy usage expressed as a carbon dioxide equivalent. Pumping Station only.	WN_GHG_MASS	CARBON
Total PST CO2 Equivalent	Applicable when carrying out Sustainability Analysis only. Total energy usage expressed as a carbon dioxide equivalent. Pumping Station only.	WN_GHG_MASS	TCARBON

Transient System Simulation

The table below lists the additional results available at nodes when an InfoWorks TS (Transient System) Simulation is run:

Field Name	Help Text	Units	Database Field	Time Varying
Avg Flow	Time weighted average of Flow results	WN_Q	FLOWAVG	False
Min Flow	Minimum Flow experienced during surge simulation	WN_Q	FLOWMIN	False
US/DS Pressure	Pressure at upstream / downstream end of link Pumping Station and Valve only	WN_P	PRESSURE	True
Avg US/DS Pressure	Time weighted average of Upstream / Downstream Pressure results Pumping Station and Valve only	WN_P	PRESSAVG	False
Min US/DS Pressure	Minimum upstream / downstream pressures experienced during surge simulation Pumping Station and Valve only	WN_P	PRESSMIN	False
US/DS Flow	Flow at upstream / downstream end of link Pumping Station and Valve only	WN_Q	SCFLOW	True
Avg US/DS Flow	Time weighted average of Upstream / Downstream Flow results Pumping Station and Valve only	WN_Q	FLOWAVG	False
Min US/DS Flow	Minimum upstream / downstream flows experienced during surge simulation Pumping Station and Valve only	WN_Q	FLOWMIN	False

Water Quality Simulation - Turbidity Analysis

The table below lists the additional results available at nodes when a Water Quality - Turbidity Analysis is run:

Field Name	Help Text	Units	Database Field	Time Varying
Stored Turbidity Ratio	The ratio of the amount of discolouration material to the total amount of such material bound to the pipe wall		STTRBRATIO	True
Peak Turbidity	The peak value of the turbidity in all segments in the pipe at the completion of the water quality time loop	WN_TURBIDITY	PKTURBIDITY	True
Maximum Peak Turbidity	The maximum peak turbidity experienced in the pipe during the simulation	WN_TURBIDITY	PKTURBMAX	False