Hydrant Node Data Fields

Node ID

Name of the node

YES

YES

1

30

0

node_id

Text

Area Code

The Area Code parameter is used for closer spatial modelling of demand - each node is allocated to an area and demand can then be factored by area.

The factor is set using the Demand Scaling Editor.

YES

YES

1

30

0

area

Text

Asset ID

For reference only. Designed as a reference to an asset database, but could be used for anything.

YES

YES

1

30

0

asset_id

Text

Fire Zone

The Fire Zone field is used when checking minimum pressure constraints during Hydrant Testing simulations. Different pressure constraints may be applied to nodes in a given Fire Zone to nodes outside of the Fire Zone. See Fire Flow Data for more details.

YES

YES

1

30

0

fire_zone

Text

System Type

For information. Type in a system type or select an option from the dropdown list:

YES

YES

1

40

0

system_type

Text

Isolation Area

Area identifier used to identify groups of objects to be closed when carrying out a Critical Link Analysis.

YES

YES

1

30

0

isolation_area

Text

X

X coordinate

YES

YES

1

2

XY

x

Double

Y

Y coordinate

YES

YES

1

2

XY

y

Double

Elevation

Elevation above datum of pipe invert.

YES

YES

1

2

Z

z

Double

-999

9999

Ground Level

Elevation above datum of ground surface.

YES

YES

1

2

Z

ground_level

Double

-999

9999

Highest Property Level

Elevation above datum level of the highest property supplied by the node

YES

YES

1

2

Z

highest_property

Double

-999

9999

Land Use Areas

NO

YES

2

0

landuse_areas

Array

Hydrant Type

Text field for information only

YES

YES

2

30

0

type

Text

Diameter

The internal diameter of the hydrant fitting

YES

YES

2

1

PS

diameter

10

20000

Outlet Elevation

Elevation of the hydrant outlet to be used in hydrant flow calculation.

Please Note

To specify Relative Outlet Elevation instead of Absolute elevation, leave this field blank.

YES

YES

2

2

Z

head_z

Double

0

9999

Relative Outlet Elevation

Elevation of the hydrant head to be used in flow calculation RELATIVE to the node elevation.

Please Note

If an absolute Outlet Elevation value has been specified, this field will not be available and will not be used.

YES

YES

2

2

L

rel_head

Double

0

9999

Local Loss Coefficient

Branch minor loss coefficient. The headloss coefficient due to change of flow direction and diameter change. Minimum value = 1.

YES

YES

2

4

local_loss

1.0

1

10000000000

Valve Diameter

Diameter of the valve when fully open

YES

YES

3

0

PS

valve_diameter

10

20000

Valve Curve

Reference to built in curve, or user defined curve. See Valve section for more details

YES

YES

3

30

0

construction_type

Text

PLUG

Loss Coeff. (Open)

Local headloss coefficient when the hydrant valve is open.

YES

YES

3

4

loss_when_open

0

10000

Demand By Category

Displayed on Node Demand Page only.

The Demand box contains a grid where you can define the Existing Demand for the node. Total demand, or demand per property is defined for each User Category supplied from the node.

The demand grid can only be edited from the Node Demand Page so full details on using this grid are included there.

Database Table Name: wn_node_demand_by_category

NO

YES

4

0

demand_by_category

Array

Leakage Loss

Flow loss via leakage. Runs at a constant rate during the simulation

YES

YES

4

2

WN_DQ

leakage_loss

Nominal Pressure

Average pressure value used for Pressure Related Demand simulations.

The value of demand corresponds to standard service pressure - average pressure in normal circumstances. This parameter allows you to state the likely value of service pressure for each node.

If the pressure available at each node differs from its set value during the simulation,all demands will be changed accordingly (the lower the pressure, the lower the consumption or loss on the node).

This adjustment of demand and loss is only activated when the Pressure Related Demand option is checked in the Schedule Hydraulic Run View and percentage of demand that is pressure related has been defined in the Demand Diagram.

The Nominal Pressure data field can be updated automatically from previous simulations. See Updating Nominal Pressures for more information.

Please Note

You are advised to experiment carefully with this option since it is dependent on accurate ground levels and working pressures. The feature has been included since it is obviously important in practice but with a warning to the user to proceed with care! Bear in mind that with the pressure-related demand option activated, total demand cannot be predicted accurately.

YES

YES

4

1

WN_P

nominal_average_pressure

Total Conns

Number of customer points allocated to node. This column is populated by using the Set Total Connections from the Model menu

YES

YES

4

0

total_connections

Total Demand

The total demand at a node averaged over 24 hours; calculated using the current Demand Diagram.

Please Note

The value reported in the Total Demand field will depend on whether a Demand Diagram is open, and whether demand categories assigned to nodes are present in the current Demand Diagram.

YES

YES

4

4

WN_DQ

total_demand

InfoNet Unique ID

The InfoNet Unique ID and InfoNet Network ID are unique identifiers associated with the corresponding object and network in an InfoAsset database. When importing from InfoAsset, these identifiers can be copied from the InfoAsset database in order to maintain links between the two networks.

YES

YES

NO

0

asset_uid

GUID

InfoNet Network ID

See InfoNet Unique ID

NO

YES

NO

0

asset_network_uid

GUID

After Last Point

YES

YES

10

0

after_xd_profile

Integer

0

Live Data Point ID

Name of the associated Live Data Point

YES

YES

11

100

0

live_data_point_id

Text

Keep Local Demand

This checkbox decides whether local demand is to be applied to the node during the simulation

• checked - any demand assigned to the node on the Node Demand Page (eg customer point demand), will be applied in addition to any Exceptional Flow and Hydrant Flow

• unchecked - The only demand that will be applied to the node will be any Exceptional Flow and Hydrant Flow. (At any time step when Exceptional Flow is zero and Hydrant Opening is 0%, local demand will be applied).

YES

YES

11

keep_local_demand

Boolean

After Last Point

YES

YES

11

0

after_hydrant_profile

Integer

0

Initial Concentration

The initial concentration of the substance being tested at the start of the simulation. Only one substance can be tested at a time.

YES

YES

12

2

WN_C

initial_concentration

0

9999

Source Type

Method by which concentration profile defined in the Water Quality grid is applied during the simulation.

YES

YES

12

0

wq_source_type

Integer

0

Initial Age of Water (hr)

Age of water at the start of the simulation.

YES

YES

12

2

initial_age

Double

0

Water Quality Concentration profile

A concentration profile is entered in the water quality grid when Source Type is set to Fixed Concentration, Additional Concentration or Concentration Booster.

The concentration of pollutant entering the system at this node between the Water Quality start and end times. This concentration does not depend on flow rate. These values can be interpolated, depending on the state of the Linear WQ Profile check box.

Database Table Name: wn_ctl_node_wq_conc

NO

YES

12

0

wq_profile

Array

Water Quality Mass Flow profile

NO

YES

12

0

wq_flow_profile

Array

Linear WQ Profile

This checkbox decides if values in the profile grid are interpolated.

• checked - linear interpolation is carried out between values

• unchecked - The value entered in the grid changes at each time point, and is maintained until the next time point is reached.

YES

YES

12

0

linear_wq_profile

Boolean

0

Before First Point (water quality)

YES

YES

12

0

before_wq_profile

Integer

2

After Last Point (water quality)

YES

YES

12

0

after_wq_profile

Integer

0

Repeat Profile (water quality)

Check the Repeat Profile box to repeat a profile (from 00:00 for the selected Repeat Period) for the duration of the simulation.

IMPORTANT

When using the Repeat Profile option; if the defined profile spans over the selected Repeat Period, the profile will not be repeated.

YES

YES

12

0

repeat_wq_profile

Boolean

0

Repeat Period (water quality)

Profile period which will be repeated throughout simulation, if the Repeat Profile box is checked.

YES

YES

12

0

repeat_wq_period

Integer

0

Water Quality

A read only check box displayed only on the grid view. This box is checked if data has been entered in the Water Quality Grid on the property sheet

NO

YES

NO

0

wqc_selected

Boolean

Method by which Bulk Coefficient is applied to water entering the system at the node:

Reaction rate parameter used to calculate the change in concentration of a substance as it reacts with material in the bulk flow.

The value specified here is applied to water entering the system at the node.

The bulk coefficient has a positive value if the concentration of the substance grows over time, and a negative value if the concentration decays over time.

Method by which Res Bulk Coefficient is applied to water entering the system at the node:

Reaction rate parameter used to calculate the change in concentration of a substance as it reacts with material in a reservoir.

The value specified here is applied to water entering the system at the node.

The bulk coefficient has a positive value if the concentration of the substance grows over time, and a negative value if the concentration decays over time.

WQ Start Date & Time

This field is obsolete and is not displayed in the interface. This data is now entered in the Water Quality Grid.

YES

YES

-

0

wq_start_date_time

WQ End Date & Time

This field is obsolete and is not displayed in the interface. This data is now entered in the Water Quality Grid.

YES

YES

-

0

wq_end_date_time

Initial turbidity at node at start of simulation.

See Water Quality - Turbidity Analysis for further information.

Method by which turbidity profile defined in the Turbidity grid is applied during the simulation.

See Water Quality - Turbidity Analysis for further information.

Database Table Name: wn_ctl_node_wq_turb

A series of time / turbidity pairs that define the turbidity profile at the node. These values can be interpolated, depending on the state of the Linear Profile flag.

See Water Quality - Turbidity Analysis for further information.

This checkbox decides if values in the Turbidity profile grid are interpolated:

• checked - linear interpolation is carried out between values

• unchecked - The value entered in the grid changes at each time point, and is maintained until the next time point is reached.

Check the Repeat Profile box to repeat a profile (from 00:00 for the selected Repeat Period) for the duration of the simulation.

IMPORTANT

When using the Repeat Profile option; if the defined profile spans over the selected Repeat Period, the profile will not be repeated.

Profile period which will be repeated throughout simulation, if the Repeat Profile box is checked.

Exceptional Flow

A series of time / flow pairs that define the exceptional flow time varying profile at the node. These values can be interpolated, depending on the state of the Linear Profile flag.

Database Table Name: wn_ctl_node_xd_flow

NO

YES

14

0

xd_flow

Array

Repeat Profile

Check the Repeat Profile box to repeat a profile (from 00:00 for the selected Repeat Period) for the duration of the simulation.

IMPORTANT

When using the Repeat Profile option; if the defined profile spans over the selected Repeat Period, the profile will not be repeated.

YES

YES

14

0

repeat_xd_profile

Boolean

0

Repeat Period

Profile period which will be repeated throughout simulation, if the Repeat Profile box is checked.

YES

YES

14

0

repeat_xd_period

Integer

0

Before First Point

YES

YES

14

0

before_xd_profile

Integer

2

Linear Profile

This checkbox decides if values in the Exceptional Flow Grid are interpolated.

• checked - linear interpolation is carried out between values

• unchecked - the flow is zero up to the first time point. The flow changes at each time point, and maintains the value set at that time point until the next time point is reached. The flow at the last time point applies until the end of the simulation.

YES

YES

14

0

linear_profile

Boolean

0

Hydrant Profile

A series of time / opening pairs that define the hydrant operation profile at the node. These values can be interpolated, depending on the state of the Linear Profile flag.

Database Table Name: wn_ctl_opening_profile

NO

YES

15

0

hydrant_profile

Array

Maximum Flow

This field is used to specify the maximum allowable flow from the hydrant. This will override flow due to hydrant opening. This field may be used for example to simulate flow restrictions due to fire-engine capacity.

This field is only used when carrying out a Fire Flow - Hydrant Testing simulation.

The maximum flow specified on the Flow Control Page of the Hydrant Property Sheet. The Maximum Flow must be greater than the Minimum Flow value.

If this field is left blank the Minimum Flow value will be taken from the values entered in the Fire Flow Data Item used in the Fire Flow simulation. or to preserve required service pressure in the network.

YES

YES

15

1

WN_Q

max_flow

0

Repeat Period

Profile period which will be repeated throughout simulation, if the Repeat Profile box is checked.

YES

YES

15

0

repeat_hydrant_period

Integer

0

Hydrant Linear Profile

This checkbox decides if values in the Hydrant Flow Grid are interpolated.

• checked - linear interpolation is carried out between values

• unchecked - the percentage opening is zero up to the first time point. The percentage opening changes at each time point, and maintains the value set at that time point until the next time point is reached. The percentage opening at the last time point applies until the end of the simulation.

YES

YES

15

0

hyd_lin_profile

Boolean

0

Repeat Profile

Check the Repeat Profile box to repeat a profile (from 00:00 for the selected Repeat Period) for the duration of the simulation.

IMPORTANT

When using the Repeat Profile option; if the defined profile spans over the selected Repeat Period, the profile will not be repeated.

YES

YES

15

0

repeat_hydrant_profile

Boolean

0

Before First Point

YES

YES

15

0

before_hydrant_profile

Integer

2

Minimum Flow

This field is only used when carrying out a Fire Flow - Hydrant Testing simulation.

The minimum flow required at the hydrant to satisfy fire fighting requirements.

If this field is left blank the Minimum Flow value will be taken from the values entered in the Fire Flow Data Item used in the Fire Flow simulation.

YES

YES

16

1

WN_Q

min_flow

Min Residual Pressure

This field is only used when carrying out a Fire Flow - Hydrant Testing simulation.

The minimum allowed residual pressure at the hydrant during the fire incident.

If this field is left blank the Min Residual Pressure value will be taken from the values entered in the Fire Flow Data Item used in the Fire Flow simulation.

YES

YES

16

2

WN_P

min_res_pressure

Network Min Residual Pressure

This field is only used when carrying out a Fire Flow - Hydrant Testing simulation.

The minimum required pressure at each node in the network.

If this field is left blank the Network Min Residual Pressure value will be taken from the values entered in the Fire Flow Data Item used in the Fire Flow simulation.

YES

YES

16

2

WN_P

system_min_res_pressure

Zone Min Residual Pressure

This field is only used when carrying out a Fire Flow - Hydrant Testing simulation.

The minimum required pressure at each node in the same fire zone as the hydrant node.

If this field is left blank the Zone Min Residual Pressure value will be taken from the values entered in the Fire Flow Data Item used in the Fire Flow simulation.

YES

YES

16

2

WN_P

zone_min_res_pressure

Notes

You can keep freeform notes about any object in your network. The notes field can be up to 64,000 characters in size, or about 10 pages of printed text.

NO

YES

18

0

notes

Memo

Node ID

Name of the node

YES

YES

1

30

0

node_id

Text

Asset ID

For reference only. Designed as a reference to an asset database, but could be used for anything.

YES

YES

1

30

asset_id

Text

Exceptional Flow

A read only check box displayed only on the grid view. This box is checked if data has been entered in the Exceptional Flow Grid on the property sheet

NO

YES

NO

0

exf_selected

Boolean