Node 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 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
• Fire Flow Node Results
• InfoWorks TS (Transient System) Node Results

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

Node Results Data fields

Database Table: __IWR_Node

Field Name	Help Text	Units	Database Field
Demand	Node Description Basic Nodes Total demand on node. Calculated as sum of: Demands defined on Node Demand Page Exceptional demand defined on Exceptional Flow Profile Page Flow due to hydrant operation defined on Hydrant Flow Profile Page If there is exceptional flow and/or flow due to hydrant operation, and the Keep Local Demand check box on the Node Control page is not checked, demands specified on the Node Demand Page will not be applied. 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 defined on Node Demand Page Exceptional Flow defined on Exceptional Flow Profile Page Transfer Nodes Total demand on node. Calculated as the sum of: Demands defined on Node Demand Page Transfer Node Flow defined on Transfer Node Flow Control Page Hydrant Node Total demand on node. Calculated as the sum of: Demands defined on Node Demand Page Exceptional Flow defined on Exceptional Flow Profile Page Flow due to hydrant operation defined on Hydrant Flow Profile Page (If the hydrant is in operation, and the Keep Local Demand check box on the Node Control page is not checked, the demands defined on the Node Demand Page are not applied)	WN_DQ	DEMAND
Head	Head at node at timestep t	HEAD	HEAD
Max Head	Maximum head at node at timestep t	HEAD	MAXHEAD
Min Head	Minimum head at node at timestep t	HEAD	MINHEAD
Leakage	Total leakage on node at current timestep. Calculated as sum of pressure related leakage and constant leakage loss defined on Node Demand Page (Not displayed for Transient Simulations)	WN_DQ	LEAKAGE
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
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
Total Consumption	Total consumption at node during simulation period. Calculated as: Total Demand - (Exceptional Flow + Hydrant Flow) Total consumption at transfer nodes will be zero. (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 defined on Node Demand Page. (Not displayed for Transient Simulations)	WN_DVO	TOTLEAK
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. InfoWorks 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
Depth	Vertical distance from reservoir bottom level to water level Reservoir only	Y	DEPTH
Inflow	Rate of flow into the Reservoir Reservoir only	WN_Q	INFLOW
Spill	The total amount of water lost to the system due to reservoir overflow Reservoir only	WN_VO	SPILL
Top Level	Top Water Level as specified on the Reservoir Parameters Page of the Reservoir Property Sheet. Reservoir only	Z	TOPLEVEL
Full Volume	Full volume of Reservoir (specified in Depth/Volume grid on Reservoir Parameters Page of the Reservoir Property Sheet). Reservoir only.	WN_VO	VOLFULL
Volume	Volume of water in the reservoir Reservoir only	WN_VO	VOLUME
Maximum Depth	Maximum depth of water in Reservoir during a simulation. Reservoir only.	Y	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. (Volume of water above the reservoir Minimum Operating Level specified in the Reservoir Parameters Page of the Reservoir Property Sheet). Reservoir only		PCFULL
Hydrant Flow	Flow due to percentage opening of hydrant valve Hydrant only	WN_Q	FLOW
Opening	Percentage opening of hydrant valve Hydrant only	WN_OPEN	OPENING
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	Help Text	Units	Database Table	Database Field	Time Varying
Concentration	The concentration at this node of the pollutant being modelled in the Water Quality simulation.	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 (selected in the Water Quality Options dialog). 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. InfoWorks calculates the average length of time the water at this node has spent in the system before arriving here. See Water Quality Solver Theory for more details on how this is calculated.		__IWR_Node	TRAVEL	False
Turbidity	Turbidity at the node (Only displayed when Turbidity Analysis carried out)	WN_TURBIDITY	__IWR_Node	TURBIDITY	True
Maximum Turbidity	Maximum Turbidity experienced during the simulation (Only displayed when Turbidity Analysis carried out)	WN_TURBIDITY	__IWR_Node	TURBMAX	False

Fire Flow Simulation Results

The tables below list the additional results available at nodes when a Fire Flow Simulation is run:

Hydrant Testing Simulation

Field Name	Help Text	Units	Database Table	Database Field	Time Varying
Residual Pressure at Minimum Fire Flow	Pressure at the test node when the Minimum Fire Flow is applied at the node. This result is calculated only if the Calculate Pressure at Min and Max Fire Flow option is checked on the Fire Flow Options dialog.	WN_P	__IWR_Node	FFMINQRP	False
Network Minimum Residual Pressure Required	The minimum residual pressure during the fire incident at nodes that are not in the same Fire Zone as the test node. Note: Fixed Head, Well and Reservoir nodes are not included in the check for Network Minimum Residual Pressure. This result is calculated only if the Use Network Constraints option is checked on the Fire Flow Options dialog.	WN_P	__IWR_Node	FFNMRPRQ	False
Maximum Fire Flow	The smaller of the user defined Maximum Fire Flow Required and calculated Fully-open Hydrant Flow at the test node. This result is calculated only if the Calculate Pressure at Minimum and Maximum Fire Flow option is checked on the Fire Flow Options dialog.	WN_Q	__IWR_Node	FFMAXQ	False
Residual Pressure at Maximum Fire Flow	Pressure at the test node when the Maximum Fire Flow is applied at the node. This result is calculated only if the Calculate Pressure at Min and Max Fire Flow option is checked on the Fire Flow Options dialog.	WN_P	__IWR_Node	FFMAXQRP	False
Maximum Fire Flow Required	A maximum flow value is specified by the user in the Fire Flow Data Item or on the Fire Flow Constraints Page of the Hydrant Node Property Sheet. This information is displayed only if the Calculate Pressure at Min and Max Fire Flow option is checked on the Fire Flow Options dialog.	WN_Q	__IWR_Node	FFMAXQRQ	False
Minimum Fire Flow	The smaller of the user defined Minimum Fire Flow Required and calculated Available Fire Flow at the test node.	WN_Q	__IWR_Node	FFMINQ	False
Minimum Fire Flow Required	Minimum flow required to satisfy fire protection needs. The minimum flow value is specified by the user in the Fire Flow Data Item or on the Fire Flow Constraints Page of the Hydrant Node Property Sheet.	WN_Q	__IWR_Node	FFMINQRQ	False
Residual Pressure at Available Fire Flow	The residual pressure at the test node when the Available Fire Flow is applied at the node.	WN_P	__IWR_Node	FFMINRP	False
Minimum Residual Pressure Required	The minimum allowed residual pressure at the test node during the fire incident	WN_P	__IWR_Node	FFMINRPR	False
Network Minimum Residual Pressure	The minimum residual pressure during the fire incident at nodes that are not in the same Fire Zone as the test node. This information is displayed only if the Use Network Constraints option is checked on the Fire Flow Options dialog.	WN_P	__IWR_Node	FFNETMRP	False
Minimum Zone Node	Node at which Zone Minimum Residual Pressure occurs.		__IWR_Node	FFHYDZND	False
Available Fire Flow	Maximum fire flow that can be taken at test node without breaching pressure constraints. The Available Fire Flow is determined from: Minimum Residual Pressure Required Zone Minimum Residual Pressure Required (if Use Zone Constraints option checked) Network Minimum Residual Pressure Required (If Use Network Constraints option checked) If the pressure constraints applied cannot be met, the test node will be Failed	WN_Q	__IWR_Node	FFAVAILQ	False
Fully-open Hydrant Flow	Flow at test node when hydrant is 100% open. This result is calculated only if the Calculate Open Hydrant Flow option is checked on the Fire Flow Options dialog.	WN_Q	__IWR_Node	FFOPENQ	False
Hydrant Fire Flow	The hydrant test flow applied to the target node. Can also be displayed as a graph plotted against Hydrant Residual Pressure. Right click in the Grid Report (Hydrant Testing) View and select Hydrant Curve from the context menu to display the graph.	WN_Q	__IWR_Node	FFHYDQ	False
Hydrant Residual Pressure	The pressure at the target node after fire flow has been applied at the node. Can also be displayed as a graph plotted against Hydrant Fire Flow. Right click in the Grid Report (Hydrant Testing) View and select Hydrant Curve from the context menu to display the graph. Applicable to Hydrant Testing and Forced Fire Flow simulations.	WN_P	__IWR_Node	FFHYDRP	False
Minimum Network Node	Node at which the Network Minimum Residual Pressure occurs.		__IWR_Node	FFNETNOD	False
Pre-Test Demand	Demand at test node at Hydrant Testing Time before applying fire flow. This is the demand that would be applied when carrying out a simulation of Run Type normal.	WN_Q	__IWR_Node	FFSTATQ	False
Result	There are three test result types: Test Result Description Passed The node will pass if the minimum fire flow required can be supplied without breaching any of the pressure constraints applied. Failed The node will fail if the minimum fire flow required cannot be supplied without breaching any of the pressure constraints applied. Unknown The test result will be unknown if the node is not tested, (if Hydrant Flow has been set up on the Flow Control Page of a test node for example), or if the simulation fails to converge.		__IWR_Node	FFRESULT	False
Zone Minimum Residual Pressure Required	The minimum allowed residual pressure during the fire incident at nodes that are in the same Fire Zone as the test node. The test node itself is not included. This information is displayed only if the Use Zone Constraints option is checked on the Fire Flow Options dialog.	WN_P	__IWR_Node	FFZMRPRQ	False
Zone Minimum Residual Pressure	The minimum residual pressure during the fire incident at nodes that are in the same Fire Zone as the test node (the test node itself is not included). This result is calculated only if the Use Zone Constraints option is checked on the Fire Flow Options dialog.	WN_P	__IWR_Node	FFZONMRP	False
Residual Pressure at Fully-open Hydrant	Pressure at the test node when the Fully-open Hydrant Flow is applied at the node. This result is calculated only if the Calculate Open Hydrant Flow option is checked on the Fire Flow Options dialog.	WN_P	__IWR_Node	FFOPENRP	False
Pre-Test Pressure	Pressure at test node at Hydrant Testing Time before applying fire flow. This is the result that would be obtained when carrying out a simulation of Run Type normal.	WN_P	__IWR_Node	FFSTATP	False
Minimum Zone Node	Node at which Zone Minimum Residual Pressure occurs.		__IWR_Node	FFZONNOD	False

Forced Fire Flow Simulation

Field Name	Help Text	Units	Database Table	Database Field	Time Varying
Maximum Velocity Link	Link ID of the link in which the Maximum Velocity occurred. If the Maximum Velocity occurs in the assumed hydrant pipe, this will be indicated by the text "Hydrant".		__IWR_Node	FFHYDVLK	False
Maximum Velocity	The maximum velocity experienced in the network at the snapshot for which the Forced Fire Flow simulation is run.	V	__IWR_Node	FFHYDVEL	False
Minimum Network Node	The Node ID of the node at which the Network Minimum Residual Pressure occurred.		__IWR_Node	FFHYDNND	False
Minimum Zone Node	Node at which Zone Minimum Residual Pressure occurs.		__IWR_Node	FFHYDZND	False
Available Fire Flow	Maximum fire flow that can be taken at test node without breaching pressure constraints. The Available Fire Flow is determined from: Minimum Residual Pressure Required Zone Minimum Residual Pressure Required (if Use Zone Constraints option checked) Network Minimum Residual Pressure Required (If Use Network Constraints option checked) If the pressure constraints applied cannot be met, the test node will be Failed	WN_Q	__IWR_Node	FFAVAILQ	False
Network Minimum Residual Pressure	The minimum residual pressure in the network. Note: Fixed Head, Well and Reservoir nodes are not included in the check for Network Minimum Residual Pressure.	WN_P	__IWR_Node	FFHYDNRP	False
Maximum Flow Reversal Link	Link ID of the link in which the Maximum Flow Reversal occurred.		__IWR_Node	FFHYDQRL	False
Maximum Flow Reversal	The maximum flow reversal in the network (compared with base simulation).	WN_Q	__IWR_Node	FFHYDQRV	False
Hydrant Relative Head	A negative value indicates that pumping will be required. The numerical value of the drop is derived by assuming that a standard hydrant object is connected to the test node. Hydrant properties used in the calculation are: Pipe diameter = min diameter of pipes attached to the test node. Relative head = 0.0 Local loss coeff = 1.0. Valve diameter = pipe diameter. Valve curve = PLUG Valve local loss = 1.0	HEAD	__IWR_Node	FFHYDRHD	False
Hydrant Residual Pressure	The pressure at the target node after fire flow has been applied at the node. Can also be displayed as a graph plotted against Hydrant Fire Flow. Right click in the Grid Report (Hydrant Testing) View and select Hydrant Curve from the context menu to display the graph. Applicable to Hydrant Testing and Forced Fire Flow simulations.	WN_P	__IWR_Node	FFHYDRP	False

Fire Flow Availability Simulation

Field Name	Help Text	Units	Database Table	Database Field	Time Varying
FFA Flow	The fire flow at each node. The simulation will attempt to enforce either the Required Fire Flow or the Residual Nodal Pressure depending on the option chosen when setting up the simulation	WN_Q	__IWR_Node	FFA_FLOW	False
Minimum Zone Node	Node at which Zone Minimum Residual Pressure occurs.		__IWR_Node	FFHYDZND	False
Available Fire Flow	Maximum fire flow that can be taken at test node without breaching pressure constraints. The Available Fire Flow is determined from: Minimum Residual Pressure Required Zone Minimum Residual Pressure Required (if Use Zone Constraints option checked) Network Minimum Residual Pressure Required (If Use Network Constraints option checked) If the pressure constraints applied cannot be met, the test node will be Failed	WN_Q	__IWR_Node	FFAVAILQ	False
FFA Residual Pressure	The residual pressure at each node. The simulation will attempt to enforce either the Required Fire Flow or the Residual Nodal Pressure depending on the option chosen when setting up the simulation	WN_P	__IWR_Node	FFA_RP	False

Transient System Simulation

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

Filed Name	Help Text	Units	Database Table	Database Field	Time Varying
Avg Demand	Time weighted average of Demand results	WN_DQ	__IWR_Node	DEMAVG	False
Min Demand	Minimum Demand experienced during surge simulation	WN_DQ	__IWR_Node	DEMMIN	False
Node Pressure	Pressure at node at which surge protection device is located	WN_P	__IWR_Node	INPRESS	True
Avg Node Pressure	Time weighted average of Node Pressure results	WN_P	__IWR_Node	INPRAVG	False
Min Node Pressure	Minimum Node Pressure experienced during surge simulation	WN_P	__IWR_Node	INPRMIN	False
SPD Pressure	Pressure at surge protection device (see Node Pressure)	WN_P	__IWR_Node	OUTPRESS	True
Avg SPD Pressure	Time weighted average of SPD Pressure results	WN_P	__IWR_Node	OUTPRAVG	False
Min SPD Pressure	Minimum SPD Pressure experienced during surge simulation	WN_P	__IWR_Node	OUTPRMIN	False
Pipe Inflow	Inflow from network to SPD Device. For example:	WN_Q	__IWR_Node	INLTFLOW	True
Avg Pipe Inflow	Time weighted average of Pipe Inflow results	WN_Q	__IWR_Node	INFLWAVG	False
Min Pipe Inflow	Minimum Pipe Inflow experienced during surge simulation	WN_Q	__IWR_Node	INFLWMIN	False
Pipe Outflow	Outflow from SPD device to network (see Pipe Inflow)	WN_Q	__IWR_Node	OUTLTFLW	True
Avg Pipe Outflow	Time weighted average of Pipe Outflow results	WN_Q	__IWR_Node	OUTFLAVG	False
Min Pipe Outflow	Minimum Pipe Outflow experienced during surge simulation	WN_Q	__IWR_Node	OUTFLMIN	False
External Depth	Depth in surge protection device	Y	__IWR_Node	EXTDEPTH	True
External Flow	Flow from network to/from surge protection device External Flow = Pipe Inflow - Pipe Outflow (See Pipe Inflow)	WN_Q	__IWR_Node	EXTFLOW	True
Avg External Flow	Time weighted average of External Flow results	WN_Q	__IWR_Node	EXTFLAVG	False
Min External Flow	Minimum External Flow experienced during surge simulation	WN_Q	__IWR_Node	EXTFLMIN	False
External Volume	Volume of air contained by surge protection device, applicable to surge tanks, air valves etc. For non-applicable devices, a value of 0.0 will be reported	WN_VO	__IWR_Node	EXTVOLUM	True
Avg External Volume	Time weighted average of External Volume results	WN_VO	__IWR_Node	EXTVOAVG	False
Min External Volume	Minimum External Volume experienced during surge simulation	WN_VO	__IWR_Node	EXTVOMIN	False
Intrusion	Only displayed when an Intrusion Calculation type has been selected from InfoWorks TS Options dialog. The volume of groundwater entering system via leaky joints or pipe cracks due to extremely low or negative pressures in the network. Gives an indicator of potential contamination threat.	WN_DVO	__IWR_Node	INTRUSN	False