Breach height (Water Overlay)

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.

How-to's

• How to set dynamic breach height

See also

• Elevation model (Water Overlay)
• Breach growth formula (Water Overlay)

---

Water Module

Water Module

Tutorials

Overview

Theory

Benchmarks

Group

Hydrological features

Water area

Water level • Water relative

Sewer area

Sewer storage • Sewer pump speed

Inundation area

Inundation level

Aquifer

Aquifer kd • Aquifer datum

Breach

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

Rain m

Limitation area

Limit area

Output

Object flow output • Object height output • Object datum output a • Object datum output b • Object width output

Related

Building attributes • Hydraulic structures •  Terrain attributes • Model attributes • Results • Simulation data