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:
Link Results Data Fields
Database Table: __IWR_Link
Field Name |
Help Text |
Database Field |
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Reverse cost of water |
The cost per cubic metre for water transferred from the To Node to the From Node |
WN_COST |
H2OCOSTR |
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Headloss per Unit Distance |
Headloss divided by Pipe Length |
WN_HLUD |
_HeadlossPerUD |
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Max Headloss per Unit Distance |
The maximum Headloss per Unit Distance value experienced during the simulation. |
WN_HLUD |
_HeadlssPerUD |
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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 |
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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 |
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Loss |
Pump energy loss. Pumping Station only. |
WN_EN |
LOSS |
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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):
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WN_P |
LOPRESS |
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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):
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WN_P |
HIPRESS |
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Headloss |
Difference in Head between upstream node and downstream node of pipe caused by friction |
HEAD |
HEADLOSS |
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Max Headloss |
Maximum Headloss value experienced during simulation. |
HEAD |
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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 |
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Head |
Pumping head. Pumping Station only. |
HEAD |
HEAD |
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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. |
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MAXPRCRT |
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Forward cost of water |
The cost per cubic metre for water transferred from the From Node to the To Node |
WN_COST |
H2OCOSTF |
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DW Friction Factor |
Darcy Weisbach Friction Coefficient. See the Pipe Calculations topic for calculation details. |
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FRICTION |
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Flow |
Volume of fluid that passes a point per unit time |
WN_Q |
FLOW |
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Max Flow |
Maximum volume of fluid that passes a point per unit time. ![]() Please Note
For all pumping stations without a bypass, the maximum flow is displayed as 0.
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WN_Q |
MAXFLOW |
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Min Flow |
Minimum volume of fluid that passes a point per unit time. ![]() Please Note
For all pumping stations without a bypass, the minimum flow is displayed as 0. |
WN_Q |
MINFLOW |
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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:
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CUMSEDST |
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Cumulative Cost |
Total cost from start of simulation to present timestep. Pumping Station only. |
WN_COST |
CUMCOST |
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Cost |
Cost due to daily rates charges. Pumping Station only. |
WN_COST |
COST |
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Cost of availability |
Cost of Availability specified on Application Dates Page of Electricity Tariff. Pumping Station only. |
WN_COST |
AVCOST |
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Velocity |
Distance travelled by fluid per unit time. For Pumping Stations, this is the velocity in the bypass pipe, if active. |
V |
_Velocity |
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Head Difference |
Difference in Head between upstream node and downstream node of pipe |
HEAD |
HEADDIFF |
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Pressure |
Pressure at downstream node of valve link. Valve only. |
WN_P |
PRESSURE |
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Max Velocity |
Maximum velocity experienced in link during simulation. For Pumping Stations, this is the maximum velocity in the bypass pipe. |
V |
VMAX |
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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 |
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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 |
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Variable Speed |
Speed of pump (variable speed pumps only). Pumping Station only. |
WN_AV |
VARSPEED |
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Type |
The value for Type identifies the type of link and can be one of the following:
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TYPE |
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Transient Pressure Amplitude |
Applicable to a simulation with Advise on Hydraulic Transients option switched on (see Simulation Options dialog). Transient pressure amplitude calculated as:
See Transients Advisor for more information. |
WN_P |
TRANPRES |
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Electricity Tariff |
Daily rates charge specified in Electricity Tariff on Daily Rates Page and Daily Rate Usage Page. Pumping Station only. |
WN_DRATE |
TARIFF |
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Status |
The value for Status at each timestep can be one of the following:
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STATUS |
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State |
The value for State at each timestep can be one of the following:
Pumping Station only. |
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STATE |
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Maximum High Pressure |
Largest High Pressure experienced in link during simulation. |
WN_P |
MAXHIPRE |
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Reversals |
A count of the number of times flow direction was reversed during the simulation |
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REVERSAL |
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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 |
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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. |
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PRESCRIT |
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Electric Power |
Electric Power used by pumps. Pumping Station only. |
WN_POW |
POWER |
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Pipe Carrying Capacity |
Concentration of sediment that can be held within flow at the current timestep |
WN_C |
PCC |
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Opening |
Percentage valve opening. If the valve is not a control valve, percentage opening will be 100%. Valve only. |
WN_OPEN |
OPENING |
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Number of Pumps |
Number of pump units in pumping station. Pumping Station only. |
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NPUMP |
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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:
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MODE |
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Minimum Low Pressure |
Smallest Low Pressure experienced in link during simulation. |
WN_P |
MINLOPRE |
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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 |
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Sediment Status |
The value for Sediment Status at each timestep can be one of the following:
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SEDSTAT |
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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 |
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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 |
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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 |
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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 |
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PST Energy |
Energy used at Pump Station at current timestep Pumping Station only. |
WN_EN |
ENERGY |
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PST Total Energy |
Total energy used at Pump Station during simulation. Pumping Station only. |
WN_EN |
TENERGY |
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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 |
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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 |
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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 |
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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 |