WaterSight - Zone Details

Product(s): WaterSight
Version(s): 10.00.
Area: Documentation

Overview

The zones information is only referred to flow. The chart displays initially a time-window of 2.5 days back into past to 12 hours into future with the range-slider below the main graph turned on.  The range-slider below shows by default a 3 month signal history. The is automatically obtained by making the flow balances of the zone (sum of all inflows minus all outflows plus the difference in tank storage). 

Shows detailed information of the flow for a specific zone. Zones should correspond to isolated areas of the system, surrounded by closed valves and where all inflows and outflows (if exist) must be measured. Zones can include for example DMA (District Metered Areas), pressure zones or operational zones. The configuration of the inflow and outflow sensors as well as tanks levels that may exist inside the zone are configured in the Zones configuration page (at the administration level) by the user. 

The user can understand if “patterned” variables lie within the expected range of values​. Particularly useful to quickly spot any anomalies in a specific zone (that can represent bursts, leaks, tank overflows, pressure problems, maintenance works, etc) in real time. The pattern confidence bands are represented by a grey band, while real (re-sampled) values are represented as a black, red or orange circles. Whenever real data (re-sampled) goes outside the pattern confidence bands (above percentile 95 or below percentile 5 of the pattern), an outlier is identified and the real value is color coded with a red circle. The user has also the option to navigate in the time history series to understand past behaviors or have access to future expected behavior (short-term forecasts), by moving the range-slider below the main graph.

Note: Navigate to the Zone details from any other page displaying the zone chart (Results, Zone Status or Zone Overview) by double-clicking inside the chart area.

Zone Name

Select from the list of available zones the one to create the chart for.

Interval

Specifies on the one hand the rate at which flow raw signal readings are re-sampled (15min, 1hour, daily) and on the other hand how the zone information is charted.

  • 15 minutes: raw signal data is re-sampled in every 15 minutes interval.
  • 1 hour: raw signal data is re-sampled in every 1 hour interval.
  • Daily minimum: The minimum value for each day (one value per day) is computed using statistical analysis (based on the 5th percentile of the time series). The daily minimum for the zones represents the minimum nightly flow. 
  • Daily average: The average value for each day (one value per day) is computed using statistical analysis (based on the 50th percentile of the time series)
  • Daily maximum: The maximum value for each day (one value per day) is computed using statistical analysis (based on the 95th percentile of the time series)

All 15 minutes values and hourly values are evaluated looking backwards. For example if the value at 9h15 is 10 l/s, this represents the re-sampled value from 9h00 to 9h15. If the hourly value is 20 l/s at 10 AM, this represents the re-sampled value from 9 AM until 10 AM. All daily values are evaluated for the specific day that is being displayed. For example if the value for day 10th is 20 l/s, this value is calculated for the time period between 00h:00mm and 23h:59mm of day 10th. 

Pattern

A pattern corresponds to an expected behavior for the zone. In OpenFlows WaterSight pattern confidence bands are computed for each sensor and for each zone using advanced statistic equations together with machine learning techniques to remove outliers or bad data. The pattern confidence bands are represented by a grey band.

The user has the option to define the historic time range to be used to compute these patterns: last month, last 2 months, last 3 months, last 6 months or last year of data.

If there is not enough historical data to compute the pattern confidence bands an informative message is displayed, and only real (re-sampled) values are shown. Clicking on this message removes the message.

Graphic Tools

Use the graphic toolbar to control the display of the charts shown on the sensor card:

On the configuration settings it is possible to turn on/off the time range slider below the main graph as well as to select the historical time range period that can be displayed: last 3 months, last 6 months, last year, last 2 years. 

Selected Zone

Statistic

Field Description
Minimum (p05) Percentile 5 of the last 3 months period, for the integration type time-series defined. 
Median (p50) Percentile 50 of the last 3 months period, for the integration type time-series defined.
Maximum (p95) Percentile 95 of the last 3 months period, for the integration type time-series defined.
Minimum/Median

Ratio of "Minimum (p05)"and "Median (p50)" of the last 3 months period, for the integration type time-series defined. High ratio means that the minimum flow is closer to the average flow, and therefore there is a higher probability of the zone having high levels of real losses.

Inflows, Outflows, Storage

List of all inflows, outflows and tank level names that are used to compute the zone flow balance. Clicking directly in one of the sensors there will forward the user to the sensor details page. 

Create Event

The user can directly create an event based on the graphs observations. Created events will automatically be saved in the Active Events list, place where they should be managed. 

For more information about WaterSight, please go to OpenFlows WaterSight TechNotes and FAQ's.

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