Creating a set of gaugings
A gauging is a pair of simultaneous point measurements of stage (water level) and discharge, together with their uncertainties.
By default, a blank set of gaugings called GS (1) pre-exists and can be used. You can create a new set of gaugings in several ways:
- via the menu Components…Create new set of gaugings;
- by right-clicking on the
Gaugings node in the Component Explorer tree; - by clicking on the
button in the toolbar.
You will be able to rename this new set of gaugings and enter a description. An existing set of gaugings can be duplicated or deleted.
All that remains is to import the gaugings file by clicking on the Import a set of gaugings button, selecting the text file of your choice and specifying its format. The gaugings file is a free-format text file, but must contain at least three columns with the following data:
- Stage expressed in metres;
- Discharge expressed in cubic metres per second;
- Expanded uncertainty of the measured discharge, expressed as a percentage of this discharge.
Details of how to specify the uncertainty of gaugings are given in this document.
Since version 3.2 of BaRatinAGE, it has been possible to import the date/time of gaugings and the uncertainty of their stages (for the rating shift detector) as well as the validity code of gaugings.
As an example, you can select the gauging_set.csv file in the example directory, which contains 58 gaugings for the Aisne at Verrières, specifying the following import parameters:
The panel is then updated as follows, after deactivating the penultimate gauging:
The gaugings table contains the following columns:
- Stage expressed in metres;
- Discharge expressed in cubic metres per second;
- Expanded uncertainty of the measured discharge, expressed as a percentage of this discharge;
- Gauging status: if the box is unchecked, the gauging will be “inactive”, i.e. it will not be used to estimate the rating curve.
Clicking on a dot in the plot displays a cyan cross centered on that gauging, and the corresponding row in the gauging table is highlighted in gray.
The set of gaugings can be exported in CSV format or copied to the clipboard. You can also open the gaugings graphic in a new window, export the image in SVG or PNG format, or copy it to the clipboard.
Managing gaugings in BaRatinAGE
If you wish to edit, delete or add one or more gaugings, you have two options:
modify the source file and re-import it (which has the advantage of ensuring synchronisation between your gaugings file and the BaRatinAGE study)
or click on the edit icon located below the gaugings table, which gives you access to the following edit window (please note that changes apply to all selected gaugings and are irreversible)
