7. Using Hydrographs

Once hydrology has been estimated, it can be applied to either a 1D or 2D model.  In this example your estimated hydrology to a 1D river model.

Reconciled hydrograph libraries need to be exported from the calculation point under the "hydrograph library" tab, one for each storm duration.

Next, you need to check your 1D model configuration.  A 1D river model is provided at the start of this tutorial and can be added by opening the provided Flood Modeller project.  This model has a single inflow boundary "SEV19005" visible in the central mapping panel and the right hand network panel.  Double click this in either and check that the "Allow event parameter override" box is ticked on - this allows the boundary held in the network to be replaced by your hydrograph library and is usually on by default.

You should now configure your model simulation.  "Unsteady-simulation" will have been loaded into the simulation menu on the left side of the interface.  Double click this to open a menu with simulation options.  

Make two changes to the simulation before running.

1) Change the simulation end time from 30 hours to 100 hours under the "Times" tab.

2) Under the "Files" tab, add one of your hydrograph libraries to the "Flow time series data (csv)" area using the "Add" button.  Once added, select a flood return period, climate change epoch and specify which 1D river node to apply the flows (in this example there is only a single inflow node, but for more complex models, this process can be repeated as needed).

The simulation can now be run by clicking the "Run" button in the bottom left corner of the interface and results inspected once the run completes.

User Steps: Export both your hydrograph library files (52hr and 63hr storm durations).  In the 1D River Model "Sample-Upton" double click on the upstream boundary (SEV19005) and ensure "Allow event parameter override" is ticked on.  Open the provided 1D simulation setup file and change the simulation end time to 100hrs.  On the "files" tab, load in one of your hydrograph library files, select the desired return period and climate change allowance, and specify the model boundary to which this will be applied.  Run the simulation and check the results.