Working with demand area calculations

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In info works. WS pro

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A demand area analysis provides data that allows users to review

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the current demand for water and project future potential demand areas.

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After generating demand areas from area codes with the demand area grid open,

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you can specify minimum knife flow parameters

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and view a summary of the demand analysis

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from the grid right, click demand area 35 and select properties.

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The demand area 35 dialog box appears which

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contains the properties for this specific demand area

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open the calculation tab

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from here, you can configure the NFM or night flow minimum time.

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The default is set to zero minutes.

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You can also configure the N FM and time.

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The default for this is five minutes.

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The measurement period is the time interval over

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which the minimum night flow will be calculated.

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The default is 60 minutes

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from the multiplier field.

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A sampling duration correction factor allows for changes

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to the minimum night flow measurement period.

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The default value for this is one.

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The minimum night flow time displays the time at which minimum night flow occurs.

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The night

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use field displays the allowance for the unp

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profiled demand used in the leakage calculations.

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You can also review several other data points from the table.

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These include the measurement period,

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start and end times for minimum night flow and the

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adjusted average of minimum night flow for the measurement period.

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There is also a count of allocated unp profiled demand properties.

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The current average specific consumption

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and the calculated average specific consumption for the allocated properties

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demand for known profiles displays the total demand

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for all demand categories used in the demand

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area that are not described as leakage profile

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or unp profile demand from the parameters tab

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unaccounted for water displays a calculated leakage

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and the leakage profile factor is the average

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factor taken from the demand diagram for

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the leakage category over the measurement period.

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Clicking report generates a report containing

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summary tables of demand area statistics,

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demand category information

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and graphs of demand profile and flow balance.

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The report can either be copied and then pasted

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to another application or saved as an html file.

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The report will show all valid results.

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Once the demand diagrams and networks have been updated,

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the ability to review demand area analysis calculations

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ensures accurate current and future demand needs.