In the average daily model, the water use node uses monthly varying, average daily consumptions for indoor and outdoor use (unlike the stochastic demand generation used in the Behavioural Water Use node). It disaggregates the daily demand data to a sub-daily time-step using a non-dimensionalised diurnal pattern.

The disaggregated demand is then further portioned into different end-uses for both indoor and outdoor consumption. This enables supply sources to be selected for different end-uses. You can also model demand management options by applying a demand reduction percentage to individual end-uses, to represent things such as water-efficient appliances, and water-saving practices. The discharge from consumption activities can also be apportioned to various water streams.

Restrictions

There are restrictions on which node inputs and outputs you can connect together. See Urban Developer node connection rules.

The Average Water Use node is available for Urban Scenarios only.

Dependencies

Node Input	Notes
Mains supply	Connect to a mains supply node (if available) (Not currently implemented in the Urban Developer Plugin)
Tank supply	Connect to a tank node (if available)
Alternative supply 1	Connect to an Alternative supply node (if available) (Not currently implemented in the Urban Developer Plugin)
Alternative supply 2	Connect to an Alternative supply node (if available) (Not currently implemented in the Urban Developer Plugin)

Node Outputs

Node Output	Notes
Blackwater	Connect to a blackwater stream (if necessary) (Not currently implemented in the Urban Developer Plugin)
Greywater	Connect to a greywater stream (if necessary) (Not currently implemented in the Urban Developer Plugin)
Irrigation/Other	Connect to any other end-use stream. For example, you can track your garden irrigation through this end-use, and link it back to a pervious area node in your model to capture the effects of run-off of irrigating your pervious area. (Not currently implemented in the Urban Developer Plugin)

Node Output

Notes

Blackwater

Connect to a blackwater stream (if necessary) (Not currently implemented in the Urban Developer Plugin)

Greywater

Connect to a greywater stream (if necessary) (Not currently implemented in the Urban Developer Plugin)

Irrigation/Other

Connect to any other end-use stream. For example, you can track your garden irrigation through this end-use, and link it back to a pervious area node in your model to capture the effects of run-off of irrigating your pervious area.

(Not currently implemented in the Urban Developer Plugin)

Node Properties

Node Property	Notes
Diurnal pattern	The node will use the diurnal use pattern set in the Appliances option in Urban Settings
Indoor average demand	The average indoor demand each month in litres/day/household. This is used to characterise the seasonal variation in water usage. Four Indoor end-uses are available: Hot Water, Laundry, Toilet and Other
Outdoor average demand	The average outdoor demand each month in litres/day/household. This is used to characterise the seasonal variation in water usage. Two Outdoor end-uses are available: Garden and Other
Total Demand Proportion (for indoor & outdoor end uses)	For each end use, enter the percentage of total indoor or outdoor demand. The Total Demand Proportion can also be used to capture the proposed effects of demand management strategies. Percentages for indoor end-uses must sum to 100, and percentages for outdoor end-uses must sum to 100.
Supply Priorities (for indoor & outdoor end uses)	For each indoor/outdoor source, enter an order of preference for supply; eg for the end use "Toilet": Enter 1 in the Rainwater Tank field to specify that rainwater is the first preference for toilet flushing. Enter 2 in the Mains field to specify that, if no rainwater is available, then use Mains water as the second preference for flushing. The option Don't Supply specifies that mains water, rainwater, etc will not supply that particular end use.
Discharge breakdown (for indoor & outdoor end uses)	For each end-use, specify the percentage of water discharged as blackwater, greywater, or other wastewater. The percentages must sum to 100%.
Demand Management Reduction (for indoor & outdoor end uses)	For each end-use, specify the percentage reduction in demand to simulate demand management options.

User Interface

The Average Water Use node currently does not support a graphical user interface for editing. Instead, the model parameters can be configured via Scenario Input Sets (Edit»Scenario Input Sets). The Input Set syntax and node parameters are illustrated below:

Nodes.Average Water Use 1.Indoor.Hot Water.Demand Management Reduction=39%
Nodes.Average Water Use 1.Indoor.Hot Water.Discharge Breakdown.Blackwater=100%
Nodes.Average Water Use 1.Indoor.Hot Water.Discharge Breakdown.Greywater=0%
Nodes.Average Water Use 1.Indoor.Hot Water.Discharge Breakdown.Irrigation=0%
Nodes.Average Water Use 1.Indoor.Hot Water.Supply Priorities.Alternate Supply 1=Don't Supply
Nodes.Average Water Use 1.Indoor.Hot Water.Supply Priorities.Alternate Supply 2=Don't Supply
Nodes.Average Water Use 1.Indoor.Hot Water.Supply Priorities.Mains=1
Nodes.Average Water Use 1.Indoor.Hot Water.Supply Priorities.Rainwater Tank=Don't Supply
Nodes.Average Water Use 1.Indoor.Hot Water.Total Demand Proportion=39%
Nodes.Average Water Use 1.Indoor.Laundry.Demand Management Reduction=23%
Nodes.Average Water Use 1.Indoor.Laundry.Discharge Breakdown.Blackwater=100%
Nodes.Average Water Use 1.Indoor.Laundry.Discharge Breakdown.Greywater=0%
Nodes.Average Water Use 1.Indoor.Laundry.Discharge Breakdown.Irrigation=0%
Nodes.Average Water Use 1.Indoor.Laundry.Supply Priorities.Alternate Supply 1=Don't Supply
Nodes.Average Water Use 1.Indoor.Laundry.Supply Priorities.Alternate Supply 2=Don't Supply
Nodes.Average Water Use 1.Indoor.Laundry.Supply Priorities.Mains=1
Nodes.Average Water Use 1.Indoor.Laundry.Supply Priorities.Rainwater Tank=Don't Supply
Nodes.Average Water Use 1.Indoor.Laundry.Total Demand Proportion=23%
Nodes.Average Water Use 1.Indoor.Other.Demand Management Reduction=13%
Nodes.Average Water Use 1.Indoor.Other.Discharge Breakdown.Blackwater=100%
Nodes.Average Water Use 1.Indoor.Other.Discharge Breakdown.Greywater=0%
Nodes.Average Water Use 1.Indoor.Other.Discharge Breakdown.Irrigation=0%
Nodes.Average Water Use 1.Indoor.Other.Supply Priorities.Alternate Supply 1=Don't Supply
Nodes.Average Water Use 1.Indoor.Other.Supply Priorities.Alternate Supply 2=Don't Supply
Nodes.Average Water Use 1.Indoor.Other.Supply Priorities.Mains=1
Nodes.Average Water Use 1.Indoor.Other.Supply Priorities.Rainwater Tank=Don't Supply
Nodes.Average Water Use 1.Indoor.Other.Total Demand Proportion=13%
Nodes.Average Water Use 1.Indoor.Toilet.Demand Management Reduction=25%
Nodes.Average Water Use 1.Indoor.Toilet.Discharge Breakdown.Blackwater=100%
Nodes.Average Water Use 1.Indoor.Toilet.Discharge Breakdown.Greywater=0%
Nodes.Average Water Use 1.Indoor.Toilet.Discharge Breakdown.Irrigation=0%
Nodes.Average Water Use 1.Indoor.Toilet.Supply Priorities.Alternate Supply 1=Don't Supply
Nodes.Average Water Use 1.Indoor.Toilet.Supply Priorities.Alternate Supply 2=Don't Supply
Nodes.Average Water Use 1.Indoor.Toilet.Supply Priorities.Mains=1
Nodes.Average Water Use 1.Indoor.Toilet.Supply Priorities.Rainwater Tank=Don't Supply
Nodes.Average Water Use 1.Indoor.Toilet.Total Demand Proportion=25%
Nodes.Average Water Use 1.Indoor Average Demand=[0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45]
Nodes.Average Water Use 1.Outdoor.Garden.Demand Management Reduction=100%
Nodes.Average Water Use 1.Outdoor.Garden.Discharge Breakdown.Blackwater=0%
Nodes.Average Water Use 1.Outdoor.Garden.Discharge Breakdown.Greywater=0%
Nodes.Average Water Use 1.Outdoor.Garden.Discharge Breakdown.Irrigation=100%
Nodes.Average Water Use 1.Outdoor.Garden.Supply Priorities.Alternate Supply 1=Don't Supply
Nodes.Average Water Use 1.Outdoor.Garden.Supply Priorities.Alternate Supply 2=Don't Supply
Nodes.Average Water Use 1.Outdoor.Garden.Supply Priorities.Mains=1
Nodes.Average Water Use 1.Outdoor.Garden.Supply Priorities.Rainwater Tank=Don't Supply
Nodes.Average Water Use 1.Outdoor.Garden.Total Demand Proportion=100%
Nodes.Average Water Use 1.Outdoor.Other.Demand Management Reduction=13%
Nodes.Average Water Use 1.Outdoor.Other.Discharge Breakdown.Blackwater=100%
Nodes.Average Water Use 1.Outdoor.Other.Discharge Breakdown.Greywater=0%
Nodes.Average Water Use 1.Outdoor.Other.Discharge Breakdown.Irrigation=0%
Nodes.Average Water Use 1.Outdoor.Other.Supply Priorities.Alternate Supply 1=Don't Supply
Nodes.Average Water Use 1.Outdoor.Other.Supply Priorities.Alternate Supply 2=Don't Supply
Nodes.Average Water Use 1.Outdoor.Other.Supply Priorities.Mains=1
Nodes.Average Water Use 1.Outdoor.Other.Supply Priorities.Rainwater Tank=Don't Supply
Nodes.Average Water Use 1.Outdoor.Other.Total Demand Proportion=13%
Nodes.Average Water Use 1.Outdoor Average Demand=[0.24213 0.21374 0.14635 0.11088 0.06253 0.05918 0.06579 0.11799 0.18973 0.25765 0.24772 0.26243]

Nodes.Average Water Use 1.Deactivated=FALSE
Nodes.Average Water Use 1.Elevation=0 m

Nodes.Average Water Use 1.Latitude=0
Nodes.Average Water Use 1.Longitude=0

Note that the Deactivated, Elevation, Latitude and Longitude properties are generic features of Source nodes. Refer to the eWater Source User Guide for further information.

Acknowledgements

This material has been adapted from:

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