Making a Rainfall Statistics Report

The Rainfall Statistics Reporting tool is used to generate monthly summary reports of your rainfall data, that includes hourly totals by day, and maximum amounts of rainfall over various durations.

To make a new rainfall statistics report:

  1. From your FlowWorks account, hover over . A drop-down menu appears.
  2. Select . This opens the Rainfall Statistics page.
  3. Select the Site that contains the rainfall Channel you wish to use, using the drop-down menu.

    For this example, we will use the Demo Rainfall US Site.

  4. Choose a Rain Channel.

    The system will automatically select the Site's rainfall Channel, if there is just one. If there is more than one, expand the drop-down menu and select the Channel you want to use in the report.

  5. Choose the reporting Year.

    For this example, we want to report on the year of 2013.

  6. Choose the reporting Month.

    For this example, we will select June.

  7. Optionally, you can have the system highlight the report at instances when rainfall exceeds a certain amount (same units as the rainfall Channel used), and for a given number of hours thereafter. Use the Highlight When area to set this up.

    For this example, we will Highlight When Rainfall exceeds .02 and then for 1 hour(s) after.

  8. Click . Your monthly rainfall summary report populates.

Below is the resulting chart from our example setup:

Note: The report will be viewed in metric or imperial, depending on where the Site is located.

This report is divided into two sections: Hourly Rainfall and Rainfall Maxima.

Hourly Rainfall

The left side of the report shows total rainfall based on the day and hour.

  • Boxes that contain a point/period indicate no rainfall during that period.
  • Boxes that contain asterisks indicate that there is no data available or that the data has been invalidated.
  • Boxes highlighted in orange indicate when rainfall exceeded 0.02mm (as per our Highlight When settings). Since we configured the report to highlight 1 hour after, the box following each instance is also colored.

Daily Rainfall Totals

  • Totals for the day are shown in the middle column and a summation of the total rainfall is located at the bottom of this column.

Rainfall Maxima

The right side of the report shows rainfall maxima. These represent the maximum rainfall in a given time period, for the day in question.

For example, if we look at the 12-hour column for the 14th day, we see a value of 0.20mm. This means that the greatest amount of rain that fell over any given 12-hour period for this day is 0.20mm. The time immediately to the right (09:00h) represents the time the rainfall event ended.

  • A plus sign (+) next to the time indicates that the time the rainfall ended is on the following day. FlowWorks' system is capable of looking at rainfall over two calendar days - it does not cut-off an event at midnight. This allows you to look at the entire rainfall event.

    • For example, on the 11th day, we see in the 24-hour column that the rain event ended at +09:20 hours. This indicates that the event ended on the 12th day at 9:20am.
  • At the bottom of the table are total monthly rainfall values for each duration.

    • In this example, in the 24-hour period 1.24mm was the great rainfall event that occurred in the given month.
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