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

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

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.

Warning
Please 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.

Warning
Please 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

Results data fields

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