Breach height (Water Overlay): Difference between revisions
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* h = -4,15 m after 2700 seconds. | * h = -4,15 m after 2700 seconds. | ||
{{article end | |||
|notes= | |||
* The initial surface height at the breach (both active and inactive) cells are lowered to the lowest value of the defined breach height array. | * The initial surface height at the breach (both active and inactive) cells are lowered to the lowest value of the defined breach height array. | ||
* The breach height as an array can also be used to stop a breach from flowing in water after x amount of seconds. However, as mentioned in the note above, it cannot be used to raise the actual surface height in the simulated area. | * The breach height as an array can also be used to stop a breach from flowing in water after x amount of seconds. However, as mentioned in the note above, it cannot be used to raise the actual surface height in the simulated area. | ||
* When using a dynamic BREACH_HEIGHT, a maximum of {{array max|pairs}} can be defined. | |||
|howtos= | |||
*[[ | *[[How to set dynamic breach height]] | ||
|seealso= | |||
* [[Elevation model (Water Overlay)]] | |||
* [[Elevation model (Water Overlay) | * [[Breach growth formula (Water Overlay)]] | ||
* [[Breach growth formula (Water Overlay) | }} | ||
{{WaterOverlay hydrological features nav}} | {{WaterOverlay hydrological features nav}} |
Revision as of 10:21, 1 September 2020
Array
This attribute can be defined as values over time, using an array of values defining interpolation-time. This allows users to more dynamically define the height used in the Breach flow formula.
Example
A levee with a datum height of 4 m is breached after 1800 seconds. It lowers down to -4.15 m in 900 seconds.
This can be simulated with the following array: 0 4 1800 4 2700 -4.15
The height value (h) used is:
- h = 4 between 0 and 1800 seconds;
- h = linearly interpolated between 4 and -4.15 based on time t within 1800 and 2700 seconds;
- h = -4,15 m after 2700 seconds.
Notes
- The initial surface height at the breach (both active and inactive) cells are lowered to the lowest value of the defined breach height array.
- The breach height as an array can also be used to stop a breach from flowing in water after x amount of seconds. However, as mentioned in the note above, it cannot be used to raise the actual surface height in the simulated area.
- When using a dynamic BREACH_HEIGHT, a maximum of 10.000 values (5.000 pairs) can be defined.