Node Results Data Fields

Node results fields are displayed on the Node 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 Node Results Window grid. Non time varying results have the field name in the normal black type.

The table below displays node 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:

Water Quality Node Results

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

Node Results Data fields

Database Table: __IWR_Node

Field Name

Description

Units

Database Field

Load (In - Out)

Net rate of inflow into reservoir (Inflow minus Outflow)

Reservoir only

WN_Q

_Load

Deficit

The reservoir may become empty because the outflows exceed the inflows. IWLive Pro Operator Client allows computation to continue with the assumption that reservoir head remains at the reservoir bottom level.

The deficit is the amount of water needed to maintain head at that level.

Reservoir only

WN_VO

DEFICIT

Demand

Node	Description
Basic Nodes	Total demand on node. Calculated as sum of: Demands Exceptional demand Flow due to hydrant operation When carrying out a Transient System Simulation, if Transient Demand is applied, no other demands will be applied.
Reservoir Node	Total demand on node. Calculated as sum of: Demands Exceptional Flow
Transfer Nodes	Total demand on node. Calculated as the sum of: Demands Transfer Node Flow
Hydrant Node	Total demand on node. Calculated as the sum of: Demands Exceptional Flow Flow due to hydrant operation

WN_DQ

DEMAND

Depth

Vertical distance from reservoir bottom level to water level

Reservoir only

DEPTH

Hydrant Flow

Flow due to percentage opening of hydrant valve

Hydrant only

WN_Q

FLOW

Head

Head at node at timestep t

HEAD

Inflow

Rate of flow into the Reservoir

Reservoir only

WN_Q

INFLOW

Leakage

Total leakage on node at current timestep. Calculated as sum of pressure related leakage and constant leakage loss.

Not displayed for Transient Simulations

WN_DQ

LEAKAGE

Max Volume

Maximum Volume of water in the Reservoir during a simulation.

Reservoir only

WN_VO

MAXVOLUME

Maximum Depth

Maximum depth of water in Reservoir during a simulation.

Reservoir only

MAXDEPTH

Outflow

Rate of flow out of the Reservoir.

Reservoir only

WN_Q

OUTFLOW

Percentage Full

Volume of water in the reservoir expressed as a percentage of available capacity.

Reservoir only

PCFULL

Opening

Percentage opening of hydrant valve.

Hydrant only

WN_OPEN

OPENING

Avg Pressure

Time weighted average of node pressure results

WN_P

PNAVG

Max Pressure

Maximum Pressure experienced at node during simulation

WN_P

PNMAX

Min Pressure

Minimum Pressure experienced at node during simulation

WN_P

PNMIN

Pressure

Pressure at node at timestep t

WN_P

PRESSURE

Spill

The total amount of water lost to the system due to reservoir overflow.

Reservoir only

WN_VO

SPILL

Status

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

Database Value	Description	Help Text
-1	temp isolated	The node is isolated in the current timestep
0	-
1	isolated	The node is isolated from the network for the duration of the simulation

STATUS

Type

The value for Type identifies the type of node and can be one of the following:

1	Node
2	Reservoir
3	Fixed Head
4	Transfer Node
5	Hydrant
6	Well

TYPE

Full Volume

Full volume of Reservoir.

Reservoir only

WN_VO

VOLFULL

Volume

Volume of water in the reservoir.

Reservoir only

WN_VO

VOLUME

Total Consumption

Total consumption at node during simulation period.

Not displayed for Transient Simulations

WN_DVO

TOTCONS

Total Demand

Total Demand applied at node during simulation period.

Not displayed for Transient Simulations

WN_DVO

TOTDEMND

Total Leakage

Total leakage applied at node during simulation period. Calculated as sum of pressure related leakage and constant leakage loss.

Not displayed for Transient Simulations

WN_DVO

TOTLEAK

Total Nominal Demand

Applicable to Pressure Related Demand simulations only.

Total Demand that would be applied at node during simulation period if the simulation were not a Pressure Related Demand simulation. i.e. Demand at node before the application of pressure related demand curves.

WN_DVO

TOTNDEMD

Nominal Demand

Applicable to Pressure Related Demand simulations only.

Demand at node calculated before the application of Pressure Related Demand curves.

WN_DQ

NOMDEMND

Event Demand Efficiency (%)

Applicable to Pressure Related Demand simulations only.

Ratio of Total Demand to Total Nominal Demand as a percentage.

DEMNDEFF

Energy Loss

Applicable when carrying out Sustainability Analysis only.

Daily rate of energy loss at customer connections.

WN_EN_DY

SUSELOSS

Total Energy Loss

Applicable when carrying out Sustainability Analysis only.

Total daily energy loss at customer connections.

WN_EN_DY

SUSTELSS

CO2 Equivalent Loss

Applicable when carrying out Sustainability Analysis only.

Daily rate of energy loss at customer connections expressed as a carbon dioxide equivalent.

WN_GHG_DYMASS

SUSCELSS

Total CO2 Equivalent Loss

Applicable when carrying out Sustainability Analysis only.

Total daily energy loss at customer connections expressed as a carbon dioxide equivalent.

WN_GHG_DYMASS

SUSTCELS

Water Quality Results

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

Field Name

Description

Units

Database Table

Database Field

Time Varying

Concentration

The concentration at this node of the pollutant being modelled in the Water Quality simulation.

If this is not a Water Quality Run this column is hidden.

WN_C

__IWR_Node

CONC

False

Concentration

The concentration contributed by any source at the node.

WN_C

__IWR_Node

CONC

False

Trace (%) <source node ID>

Percentage of water at a node that has originated from a trace node.

__IWR_Node

TRACE

False

Max Trace (%) <source node ID>

Maximum Trace (%) value experienced during the simulation.

__IWR_Node

False

Source Concentration

Concentration contributed by any source defined at the node.

WN_C

__IWR_Node

SRCCON

False

Average Age of Water (hr)

Time weighted average of Age of Water results calculated at each water quality timestep.

__IWR_Node

WQAVGAGE

False

Dominant Source

Indication of which source contributes the most to water reaching the node, where the sources are Trace Nodes (

Database Value	Description	Help Text
-2	MIXED	Sources sum to 100% but no trace exceeds 50%
-1	DOUBLED	Sum of sources exceeds 100%
0	UNKNOWN	Sum of sources less than 100%
1	TRACE01	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
2	TRACE02	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
3	TRACE03	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
4	TRACE04	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
5	TRACE05	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
6	TRACE06	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
7	TRACE07	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
8	TRACE08	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
9	TRACE09	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.
10	TRACE10	Sum of sources equals 100% (within a 5% tolerance) and the reported source node provides> 50% of water reaching the node.

__IWR_Node

TRACE_DOMINANT

False

Trace (%)

__IWR_Node

TRACE

False

Age of Water (hr)

This factor gives an estimate of the age of water at various points in the system. This can be used as a rule of thumb measure of underlying water quality.

Any new water entering the system at reservoirs or source nodes has age zero, unless an Initial Age of Water has been specified. IWLive Pro Operator Client calculates the average length of time the water at this node has spent in the system before arriving here. See InfoWorks WS Pro help for more details on how this is calculated.

__IWR_Node

TRAVEL

False

Node Results Data Fields

Node Results Data fields

Water Quality Results

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