Breach height (Water Overlay): Difference between revisions
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==Array== | ==Array== | ||
This attribute can be defined as [[time sequence (Water Overlay)|values over time]], using an array of values defining {{time sequence interpolated}}. This allows users to more dynamically define the height used in the [[Breach_flow_formula_(Water_Overlay)|Breach flow formula]]. | |||
=====Example===== | =====Example===== | ||
Revision as of 07:01, 15 May 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.
How to
See also
- Group
- Water area
- Breach height • Breach width • Breach angle • Breach coefficient • Breach speed • Breach input area • Breach level area • External surface level • External water level • External area
- Rain area
- Limit area
- Output