Shoreline (Water Overlay): Difference between revisions

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When a Waterway polygon is not correctly positioned in relation to the DEM this can result in filling up the nearby land with water at the start of the simulation. This will result in a lower water level then is expected from the water area value. To correct this, a "shoreline" is added at neighbouring cells. At the start of the simulation, these shoreline cells will also be filled with water up to the nearby water level to prevent the initial flush.
When a Waterway polygon is not correctly positioned in relation to the DEM this can result in filling up the nearby land with water at the start of the simulation. This will result in a lower water level then is expected from the water area value. To correct this, a "shoreline" is added at neighbouring cells. At the start of the simulation, these shoreline cells will also be filled with water up to the nearby water level to prevent the initial flush.
<gallery mode=nolines>
File:Wateroverlay_shoreline.png|Water Overlay with shoreline active.
File:Wateroverlay_without_shoreline.png|Water Overlay without shoreline active.
File:Wateroverlay_difference_waterlevel.png|Difference in [[Surface last value result type (Water Overlay)|water level]].
</gallery>


{{article end
{{article end
|notes=
|notes=
* This option is active by default.
* This option is active by default.
* Shoreline currently only extends to one grid cell in each direction, as can be seen in the images above.
|howtos=
|howtos=
* [[How to add and remove an Attribute]]
* [[How to add and remove an Attribute]]

Latest revision as of 10:29, 29 January 2024

When a Waterway polygon is not correctly positioned in relation to the DEM this can result in filling up the nearby land with water at the start of the simulation. This will result in a lower water level then is expected from the water area value. To correct this, a "shoreline" is added at neighbouring cells. At the start of the simulation, these shoreline cells will also be filled with water up to the nearby water level to prevent the initial flush.

Notes

  • This option is active by default.
  • Shoreline currently only extends to one grid cell in each direction, as can be seen in the images above.

How-to's