14. Flood Modeller

14.1 Loading¶

Flood Modeller cross-sections and results can be loaded either via the .dat or .gxy files. They can be loaded by dragging the file into the QGIS Map Canvas from a file explorer or from the Browser Panel. If loading via the .gxy, a dialogue will appear and prompt the user to select optional .dat and result files.

Additional notes on loading from either the .dat or .gxy file:

• Loading via the .dat file, any given cross-section must contain eastings and northings to load into QGIS.
• Loading via the .dat file will load only the cross-sections and not any results.
• Loading via the .gxy file, it is not required to include a .dat file or any results.
• Results can be a single .zzn, or multiple CSV files exported from Flood Modeller or from the Python API.
• If a .dat file is not included, some result types will not be available in the Section Plot, such as "bed level" and "pipes".
• Long sections will favour the .dat file if it is available. Long sections generated with a .dat compared with only the .gxy file may differ. This is due to potential differences in connectivity and channel lengths.

14.2 Reference Time¶

The reference time determines the isodate values shown for the "Animation Range" in the Temporal Controller window. Typically, if loading results from a .zzn, a reference time will be included in the result. Otherwise, if loading results from a CSV, there will not be a reference time.

If the Flood Modeller result does not have an inherent reference time, the following hierarchy is used to set the reference time:

• If a result with an inherent reference time is added to the workspace, or exists in the workspace already, then the reference time of the Flood Modeller results will be updated to match the other reference time.
• Given no other source, TUFLOW Viewer will default to '1990-01-01 00:00:00'.

There is currently no method of changing the reference time of the Flood Modeller result within QGIS.

14.3 Plotting¶

The Flood Modeller result format is supported in the following plot types:

• Time Series Plot
• Section Plot

The Flood Modeller result only supports plotting using the selection tool. See the Plot Window documentation for more information on plotting. Note: Flood Modeller results are contained on nodes and not links, so the user should select nodes when plotting.

Within the Section Plot, the generated long sections can be limited to a section of channels by selecting an upstream and downstream node. It is also possible to select more than two nodes, as long as one of the selected nodes is downstream of all the other selected nodes (this will be treated as multiple branches).

Note: It is not yet possible to plot water level results on the cross-sections.