Breach measurement distance m (Water Overlay): Difference between revisions

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{{Overlay keys|<onlyinclude>
[[File:Wateroverlay_wizard_breach_measurement_distance_m.png|thumb|right|Breach measurement distance m can be configured in ''Breach Growth'' step of a [[Flooding Overlay]] wizard.]]
{{Overlay keys|type=row|group=Water Overlay
{{Overlay attributes|<onlyinclude>
|key=BREACH_MEASUREMENT_DISTANCE_M
{{Overlay attributes|type=row|overlay=Water  
|attribute=BREACH_MEASUREMENT_DISTANCE_M
|unit=m
|unit=m
|description=Distance behind the breach area for placing a more stable water level measurement.
|description=Distance from the breach area to the automatic downstream water level measurement point, in the direction of the breach.
|defaultvalue=100
|defaultvalue=100
|icon=breach_measurement_distance_m.png
|range=0 to {{max surface}}
|icon=waterwizard_icon_breach_measurement_distance_m.png
}}</onlyinclude>}}
}}</onlyinclude>}}


{{article end
{{article end
|notes=
|notes=
* Distance behind the [[Breach (Water Overlay)|breach]] for placing a more stable water level measurement, used in the [[Breach_growth_formula_(Water_Overlay)|Verheij–van der Knaap growth formula]].
* This distance is only taken into account when not using a manually defined [[Breach level area (Water Overlay)|Breach level area]].
* In order to place the measurement the breach area must have a [[Breach_angle_(Water_Overlay)|BREACH_ANGLE]].
* In order to place the measurement the breach area must also have a [[Breach_angle_(Water_Overlay)|BREACH_ANGLE]]. Together they determine the location at which the point of measurement is placed.
* Only when the area behind the breach is lower then the breach level itself the measurement point can be placed. This prevents invalid measurements behind e.g. buildings.
* The downstream water level of the breach is used in the [[Breach_growth_formula_(Water_Overlay)|Verheij–van der Knaap growth formula]].
* The measurement point is only placed if the calculated location is lower than the breach level, preventing invalid placement (e.g., on top of a [[building]]).
|seealso=
|seealso=
* [[Breach flow formula (Water Overlay)]]
* [[Breach flow formula (Water Overlay)]]
* [[Breach model (Water Overlay)]]
* [[Weir formula (Water Overlay)]]
* [[Weir formula (Water Overlay)]]
|howtos=
|api=
* [[Api session event editor overlay set attribute]]
}}
}}


{{WaterOverlay model attribute nav}}
{{WaterOverlay model attribute nav}}

Latest revision as of 14:06, 15 July 2026

Breach measurement distance m can be configured in Breach Growth step of a Flooding Overlay wizard.

Notes

  • This distance is only taken into account when not using a manually defined Breach level area.
  • In order to place the measurement the breach area must also have a BREACH_ANGLE. Together they determine the location at which the point of measurement is placed.
  • The downstream water level of the breach is used in the Verheij–van der Knaap growth formula.
  • The measurement point is only placed if the calculated location is lower than the breach level, preventing invalid placement (e.g., on top of a building).

See also

API Endpoints