Bridge elevation (Water Overlay)

Bridge elevation can be configured in Structure Settings step of a Water Overlay wizard.

Icon	Attribute	Unit	Range	Description	Default value
	BRIDGE_ELEVATION	nominal	0 to 2	Specifies the mode by which bridges are include in the elevation model, used for the water calculations.	Lowest

The water model uses an elevation model for the surface flow calculations. This setting defines how to include bridges in this elevation model:

0.	Lowest: The lowest elevation point from the terrain elevation (DTM) below bridge is used, when the terrain is water. Otherwise the behavior is similar to Terrain.
1.	Terrain: Under bridges, the terrain elevation (DTM) is used, otherwise the limited surface elevation (DSM) is used. Water can flow under the bridge according to the terrain elevation.
2.	Bridge : Use bridge deck as elevation. Bridges and floating buildings are included in the DEM, blocking water flow.

• 

  Lowest option measured on water

• 

  Terrain option measured on water

• 

  Bridge option measured on water

• 

  Lowest option measured on land

• 

  Terrain option measured on land

• 

  Bridge option measured on land

Notes

• When using Bridge mode, it is still possible to model the flow from one side of a bridge to the other by using a Culvert.
• The surface elevation (DSM) always limits the height of the buildings to the design flood elevation.

How-to's

• How to add and remove an Attribute

Videos

Explanation of how bridges are made water permeable in the Tygron Platform. (In dutch)

Explanation how to deal with bridges and the elevation map in your water system. (In dutch)

---

Water Module

Water Module

Tutorials

Overview

Theory

Benchmarks

Group

Model attributes

Model attributes

Allowed water increase m • Avg shore width m • Avg terrain width m • Avg terrain storage m • Breach measurement distance m • Bridge elevation • Culvert dem threshold m • Design flood elevation m • Extended reconstruction • Ground bottom distance m • Ground bottom pressure m • Ground water • Ground water depth m • Ground watertable with surface • Impact flood threshold m • Impact range m • Increased resolution • Infiltration factor s

Limit area • Limit rain • Max infiltration m • Max water bottom m • Microrelief storage fraction • Min max elevation • Object entry correction • Prequel surface level relative • Rise rate distance m • Sewer overflow threshold • Shoreline • Show duration flood level m • Stabilizer angle • Start date ms • Surface water • Surface water evaporation factor • Timeframe times • Timeframes • Unsaturated fraction • Weir dam multiplier • Weir move interval s • Weir move range m • Weir move step m

Related

Building attributes • Hydrological features • Hydraulic structures •  Terrain attributes • Results • Simulation data