Surface Flow¶
Surface flow inflows inject water along a line at a specified volumetric flow rate.
Properties¶
An inflow location carries a title and a Data value. There is no type field to set.
| Field | Description |
|---|---|
| Title | A name for this location |
| Data | Either a Constant flow rate in m^3/s, or a saved Hydrograph |
Usage¶
Surface inflows are drawn as LineString features. The flow rate is distributed along the line.
Choose Constant and enter the rate, and the form shows m^3/s next to the field. A constant of 0.5 injects 0.5 m^3/s along the line for the whole simulation. In the exported scenario package that appears as:
For a flow that varies over time, choose Hydrograph and pick a saved series. Only hydrograph-type series are offered, so you cannot attach a rainfall hyetograph here by accident.
One Inflow can hold several locations, each with its own hydrograph. Use that for multiple tributaries rather than creating a second Inflow layer, because a scenario references only one.
Timing¶
A hydrograph is applied as a step function on a per-second index, and outside its own range the rate is zero rather than the nearest sample. A location whose series starts after the run does contributes nothing over the lead-in. A series with no overlap at all with the model window aborts the Run rather than running a dry model.
When several locations start at different times, they are merged on absolute time, so check that their start times are the ones you intended.
How it works¶
Internally, surface inflow lines are applied as ANUGA Inlet_operator instances. The line must be within the domain boundary; lines outside the boundary are silently ignored.
Tip
Surface inflows are useful for modelling pipe outfalls, creek inflows, or other point and line sources of water entering the domain.