Link Results Data Fields

Link results fields are displayed on the Link Results Window when opened while viewing a replay of a simulation.

Time varying results are shown with the field name in an alternate colour on the Link Results Window grid. 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.

Please refer to the InfoWorks WS Pro help for more in-depth information.

Link Results Data Fields

Database Table: __IWR_Link

Field Name

Description

Database Field

Headloss per Unit Distance

Headloss divided by Pipe Length

_HeadlossPerUD

Velocity

Distance travelled by fluid per unit time.

For Pumping Stations, this is the velocity in the bypass pipe, if active.

_Velocity

Cost of availability

Cost of Availability.

Pumping Station only.

AVCOST

Cost

Cost due to daily rates charges.

Pumping Station only.

COST

Cumulative Cost

Total cost from start of simulation to present timestep.

Pumping Station only.

CUMCOST

Cumulative Flow

Total flow from start of simulation to present timestep (flow direction dependent).

CUMFLOW

PST Energy

Energy used at Pump Station at current timestep

Pumping Station only.

ENERGY

Flow

Volume of fluid that passes a point per unit time

FLOW

DW Friction Factor

Darcy Weisbach Friction Coefficient.

FRICTION

Forward cost of water

The cost per cubic metre for water transferred from the From Node to the To Node

H2OCOSTF

Reverse cost of water

The cost per cubic metre for water transferred from the To Node to the From Node

H2OCOSTR

Head

Pumping head.

Pumping Station only.

HEAD

Head Difference

Difference in Head between upstream node and downstream node of pipe.

HEADDIFF

Headloss

Difference in Head between upstream node and downstream node of pipe caused by friction.

HEADLOSS

High Pressure

Highest pressure experienced along pipe at timestep (t).

The calculation of this result depends on whether additional results have been produced to provide a qualitative estimate of areas potentially experiencing high or low transient pressures.See InfoWorks WS Pro help for further details.

Transients Advisor

High Pressure at timestep (t)

OFF (default)

Higher of connected node pressures at (t)

Higher of connected node pressures (t)

Transient Pressure (t)

HIPRESS

Low Pressure

Lowest pressure experienced along pipe at timestep (t).

Transients Advisor

High Pressure

OFF (default)

Lower of connected node pressures at (t)

Lower of connected node pressures (t)

Transient Pressure (t)

LOPRESS

Loss

Pump energy loss.

Pumping Station only.

LOSS

Max Headloss per Unit Distance

The maximum Headloss per Unit Distance value experienced during the simulation.

_HeadlssPerUD

Max Headloss

Maximum Headloss value experienced during simulation.

Maximum Cost

Monthly charge for Maximum Power used.

Pumping Station only.

MAXCOST

Maximum High Pressure

Largest High Pressure experienced in link during simulation.

MAXHIPRE

Licensed Maximum Power

Licensed Maximum Power.

Maximum licensed power on the pumping station site (not the maximum installed power).

Pumping Station only.

MAXPOWER

Maximum Pressure Criticality

Ratio of maximum pressure experienced in link during simulation to allowable working pressure.

Maximum Pressure Criticality will be zero if a pressure class has not been specified for the link.

MAXPRCRT

Minimum Low Pressure

Smallest Low Pressure experienced in link during simulation.

MINLOPRE

Mode

Valve

Operation Mode for a valve. If the valve is not a control valve, mode will be THV.

Mode will be one of the following:

Database Value	Help Text
THV	Throttled Valve
PRV	Pressure Reducing Valve
PSV	Pressure Sustaining Valve
PCV	Pressure Controlled Valve
TCV	Time Controlled Valve
FCV	Flow Controlled Valve
FRV	Flow Regulating Valve
PFV	Pressure/Flow Valve
FMV	Flow Modulated Valve
PRSV	Pressure Reducing / Sustaining Valve
OCV	Open/Closed Valve

Pumping Station

Mode of Control

Mode will be one of the following:

Database Value	Help Text
FLOW	Discharge through the pumping station as a given function of time
AUTO	Pumps switched on/off according to variation of pressure in the control node or water level in the control reservoir.
PLAN	Pumps operate according to an accepted schedule covering the whole period of simulation.
PROF	Pumps operate in such a manner that water level in the control reservoir (or pressure in the control node) follows a given target profile.
TFLW	Pumps operate in such a manner that flow in a control pipe follows a given target profile.
TURB	Pumping station operates in turbine mode. Turbine operate according to an accepted schedule covering the whole period of simulation.

MODE

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

Opening

Percentage valve opening. If the valve is not a control valve, percentage opening will be 100%.

Valve only.

OPENING

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

Electric Power

Electric Power used by pumps.

Pumping Station only.

POWER

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

Pressure

Pressure at downstream node of valve link.

Valve only.

PRESSURE

Reversals

A count of the number of times flow direction was reversed during the simulation

REVERSAL

State

The value for State at each timestep can be one of the following:

0	OFF
1	ON

Pumping Station only.

STATE

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.

TYPE

Electricity Tariff

Daily rates charge.

Pumping Station only.

TARIFF

Total Energy

Total energy used at Pump Station during simulation.

Pumping Station only.

TENERGY

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

Variable Speed

Speed of pump (variable speed pumps only).

Pumping Station only.

VARSPEED

Max Velocity

Maximum velocity experienced in link during simulation.

For Pumping Stations, this is the maximum velocity in the bypass pipe.

VMAX

Min Velocity

Minimum velocity experienced in link during simulation

For Pumping Stations this is the minimum velocity in the bypass pipe.

VMIN

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.

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.

VPOSMAX

Maximum Cost 2

Second monthly charge for Maximum Power used.

Pumping Station only.

MAXCOST2

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.

See InfoWorks WS Pro help for more information.

CUMSEDST

Transient Pressure Amplitude

Applicable to a simulation for which additional results have been produced to provide a qualitative estimate of areas potentially experiencing high or low transient pressures

Transient pressure amplitude.

See InfoWorks WS Pro help for more information.

TRANPRES

Pipe Carrying Capacity

Concentration of sediment that can be held within flow at the current timestep

PCC

Maximum Transient Pressure

Applicable to a simulation for which additional results have been produced to provide a qualitative estimate of areas potentially experiencing high or low transient pressures

Largest Transient Pressure experienced in link during simulation.

See InfoWorks WS Pro help for more information.

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.

See InfoWorks WS Pro help for more information.

SEDSTAT

Energy Loss