Model attributes (Water Overlay): Difference between revisions

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The [[Water Overlay|water overlay]]'s model calculations depend on a number of calculation-wide parameters. These parameters are available as attributes of the water overlay and can be modified as such.
The [[Water Overlay]]'s model calculations depend on a number of calculation-wide parameters. These parameters are available as attributes of the water overlay and can be modified as such.


{| class="wikitable"
{{overlay attributes|suppresscategory=true|allowselflinks=true|
! Icon
{{:Allowed water increase m (Water Overlay)}}
! Attribute
{{:Culvert dem threshold m (Water Overlay)}}
! Unit
{{:Design flood elevation m (Water Overlay)}}
! Description
{{:Gravity (Water Overlay)}}
|-
{{:Ground bottom distance m (Water Overlay)}}
| [[File:waterwizard_icon_allowed_water_increase.png]]
{{:Ground water (Water Overlay)}}
| {{anchor|ALLOWED_WATER_INCREASE_M|[[Allowed_water_increase_m_(Water_Overlay)|ALLOWED_WATER_INCREASE_M]]}}
{{:Ground watertable with surface (Water Overlay)}}
| m
{{:Impact flood threshold m (Water Overlay)}}
| The amount by which the water level on a water terrain must increase before it is considered stressed by water. This is used to compute the [[water stress result type (Water Overlay)|WATER_STRESS]] result type.
{{:Limit rain (Water Overlay)}}
|-
{{:Max water bottom m (Water Overlay)}}
|
{{:Max water depth m (Water Overlay)}}
| {{anchor|CULVERT_DEM_THRESHOLD_M|[[culvert dem threshold (Water Overlay)|CULVERT_DEM_THRESHOLD_M]]}}
{{:Minimal culvert diameter m (Water Overlay)}}
| m
{{:Object correction (Water Overlay)}}
| The maximum distance a culvert's [[culvert threshold (Water Overlay)|height]] can be below the [[terrain height (Water Overlay)|terrain]], for the terrain height to be adjusted to the threshold of the culvert.
{{:Seepage fluctuation (Water Overlay)}}
|-
{{:Sewer overflow threshold (Water Overlay)}}
|
{{:Shoreline (Water Overlay)}}
| {{anchor|DESIGN_FLOOD_ELEVATION_M|[[Design_flood_elevation_m_(Water_Overlay)|DESIGN_FLOOD_ELEVATION_M]]}}
{{:Show duration flood level m (Water Overlay)}}
| m
{{:Surface water evaporation factor (Water Overlay)}}
| Constructions in the 3D world are assumed to have at most this height compared to the surface of the terrain. Greater values can create a more accurate model but will impact performance.
{{:Timeframes (Water Overlay)}}
|-
}}
|
| {{anchor|GRAVITY|[[Gravity_(Water_Overlay)|GRAVITY]]}}
| m/s²
| Used constant for gravitational acceleration.
|-
|
| {{anchor|GROUND_BOTTOM_DISTANCE_M|[[Ground_bottom_distance_m_(Water_Overlay)|GROUND_BOTTOM_DISTANCE_M]]}}
| m
| Assumed distance under the terrain surface where the soil becomes impenetrable for water. The groundwater level cannot go below this depth, relative to the surface. The maximum amount of water that can be stored underground is equal to this attribute multiplied by the local terrain's [[Terrain water storage percentage (Water Overlay)|WATER_STORAGE_PERCENTAGE]].
|-
|
| {{anchor|GROUND_WATER|[[Ground_water_(Water_Overlay)|GROUND_WATER]]}}
| nominal value
| Whether and how [[Underground model (Water Overlay)|water in the underground]] is simulated during the calculation.
|-
|
| {{anchor|GROUND_WATERTABLE_WITH_SURFACE|[[Ground_watertable_with_surface_(Water_Overlay)|GROUND_WATERTABLE_WITH_SURFACE]]}}
| {{boolean}}
| Whether the [[Ground_watertable_result_type_(Water_Overlay)|ground watertable result type]] should also include the surface water level, when the groundwater levels are close to the surface.
|-
| [[File:waterwizard_icon_allowed_water_increase.png]]
| {{anchor|IMPACT_FLOOD_THRESHOLD_M|[[Impact_flood_threshold_m_(Water_Overlay)|IMPACT_FLOOD_THRESHOLD_M]]}}
| m
| The amount of water a construction must experience before it is considered impacted by water. Water must reach this height either on one of the cells the construction is on, or on one of the cells adjacent to it. This is used to compute the [[impacted buildings result type (Water Overlay)|IMPACTED BUILDINGS]] result type.
|-
|
| {{anchor|LIMIT_RAIN|[[Limit rain (Water Overlay)|LIMIT_RAIN]]}}
| nominal value
| Whether and how calculations in the simulation should be limited to specific locations of the 3D world.
|-
|
| {{anchor|MAX_WATER_BOTTOM_M|[[max water bottom m (Water Overlay)|MAX_WATER_BOTTOM_M]]}}
| {{mdatum}}
| The maximum height for the bottoms of [[terrain water (Water Overlay)|water terrain]]s. Any [[terrain water (Water Overlay)|water terrain]] with a bottom at a higher {{datum}} height has its bottom lowered to this value.
|-
|
| {{anchor|MAX_WATER_DEPTH_M|[[Max_water_depth_(Water_Overlay)|MAX_WATER_DEPTH_M]]}}
| m
| The maximum depth of water on a cell that is able to move horizontally. This parameter can be set to influence the wave part in the [[surface flow formula (Water Overlay)|Saint-Venant equations]].
|-
|
| {{anchor|MINIMAL_CULVERT_DIAMETER_M|[[Minimal_culvert_diameter_m_(Water_Overlay)|MINIMAL_CULVERT_DIAMETER_M]]}}
| m
| The minimal culvert diameter in meters.
|-
|
| {{anchor|OBJECT_CORRECTION|[[Object_correction_(Water_Overlay)|OBJECT_CORRECTION]]}}
| {{boolean}}
|  Objects (culverts, pumps, weirs) can sometimes overlap each other and then one or more objects become inactive. When this happens the rasterizer automatically moves the inactive object(s) start/end point(s) by a maximum of one cell so the object(s) become active.
|-
| [[File:Waterwizard icon seepage fluctuation.png]]
| {{anchor|SEEPAGE_FLUCTUATION|[[Seepage_fluctuation_(Water_Overlay)|SEEPAGE_FLUCTUATION]]}}
| m
| The additional head of higher areas outside the project causing groundwater seepage. This seepage fluctuation is [[Underground_seepage_formula_(Water_Overlay)|added on top of the base seepage]]. This variation can be defined over time, similar to a weather's [[Rain_m_(Water_Overlay)|rainfall]].
|-
|
| {{anchor|SEWER_OVERFLOW_THRESHOLD|[[Sewer_overflow_threshold_(Water_Overlay)|SEWER_OVERFLOW_THRESHOLD]]}}
| fraction (m/m)
| How much of a [[sewer storage (Water Overlay)|sewer's storage]] must be filled with water before the [[Sewer overflow (Water Overlay)|sewer's overflows]] are allowed to overflow water.
|-
|
| {{anchor|SHORELINE|[[Shoreline_(Water_Overlay)|SHORELINE]]}}
| {{boolean}}
|  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 level 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. By default this option is turned on, but can be turned off by changing the attribute to 0.
|-
| [[File:waterwizard_icon_allowed_water_increase.png]]
| {{anchor|SHOW_DURATION_FLOOD_LEVEL_M|[[Show_duration_flood_level_m_(Water_Overlay)|SHOW_DURATION_FLOOD_LEVEL_M]]}}
| m
| The amount of water which must be present in a specific location before the duration of surface water can be recorded. This is used to compute the [[surface duration result type (Water Overlay)|SURFACE_DURATION]] result type.
|-
|
| {{anchor|SURFACE_WATER_EVAPORATION_FACTOR|[[Surface_water_evaporation_factor_(Water_Overlay)|SURFACE_WATER_EVAPORATION_FACTOR]]}}
| factor
| The factor by which the [[weather (Water Overlay)|weather]]'s evaporation factor is multiplied to compute the amount of [[surface evaporation formula (Water Overlay)|evaporation]] which takes place on the surface.
|-
|
| {{anchor|TIMEFRAMES|[[Timeframes_(Water_Overlay)|TIMEFRAMES]]}}
| integer
| The number of intermediate results recorded during the calculation. Each [[timeframe]] becomes a snapshot of data which can be viewed and analysed.
|}


{{WaterOverlay_model_attribute_nav}}
{{WaterOverlay_model_attribute_nav}}
[[Category:Water Module]]
[[Category:Water Module]]

Revision as of 09:55, 2 October 2020

The Water Overlay's model calculations depend on a number of calculation-wide parameters. These parameters are available as attributes of the water overlay and can be modified as such.

Gravity (Water Overlay)

Max water depth m (Water Overlay) Minimal culvert diameter m (Water Overlay)

Seepage fluctuation (Water Overlay)

Icon Attribute Unit Range Description Default value
Waterwizard icon allowed water increase.png ALLOWED_WATER_INCREASE_M m The amount by which the water level on a water terrain must increase before it is considered stressed by water. This is used to compute the WATER_STRESS result type. 0.4
CULVERT_DEM_THRESHOLD_M m 0 to 10000 The maximum distance a culvert's height can be below the terrain, for the terrain height to be adjusted to the threshold of the culvert. 10
Waterwizard icon design flood elevation m.png DESIGN_FLOOD_ELEVATION_M m Buildings in the model are assumed to have at most this height compared to the surface of the terrain. Greater values can create a more accurate model but will impact performance. 1
Waterwizard icon ground bottom distance m.png GROUND_BOTTOM_DISTANCE_M m 0 to 10000 Assumed distance under the surface terrain where the bottom boundary is situated. 10
GROUND_WATER nominal value Whether and how water in the ground is simulated during the calculation. Infiltration Only
Waterwizard icon ground watertable with surface.png GROUND_WATERTABLE_WITH_SURFACE boolean Whether the ground watertable result type should also include the surface water level, when the groundwater levels are close to the surface. True
Waterwizard icon impact flood threshold.png IMPACT_FLOOD_THRESHOLD_M m The amount of water a Building must experience before it is considered impacted by water. 0,1
Limit rain.png LIMIT_RAIN nominal value Whether rainfall can be overridden by rainfall defined in rain areas across the project area. 0 (Entire map)
Max water bottom m.png MAX_WATER_BOTTOM_M m + datum The maximum height for the bottoms of water terrains. Any water terrain with a bottom at a higher datum height has its bottom lowered to this value. 10000
Object correction.png OBJECT_ENTRY_CORRECTION cells 0 to 3 cells How many cells allowed to move a hydraulic structure's entry point when it overlaps with another hydraulic building. 2
Sewer overflow height.png SEWER_OVERFLOW_THRESHOLD fraction (m/m) 0 to 1 How much of a sewer's storage must be filled with water before the sewer overflows are allowed to overflow water. 0.9
Waterwizard icon shoreline.png SHORELINE boolean Whether to automatically fill cells near a water terrain when there is a mismatch between the extend of the water terrain and the DEM. True
Waterwizard icon show duration flood level m.png SHOW_DURATION_FLOOD_LEVEL_M m -10000 to 10000 The amount of water which must be exceeded in a specific location before the duration of surface water can be recorded. This is used to compute the SURFACE_DURATION result type. 0
Waterwizard icon surface water evaporation factor.png SURFACE_WATER_EVAPORATION_FACTOR factor 0 to 10 The factor by which the weather evaporation factor is multiplied to compute the amount of evaporation which takes place on the surface. 1.3
Timeframes.png TIMEFRAMES integer 1 to 1000 The number of intermediate results recorded during the calculation. Each timeframe becomes a snapshot of data which can be viewed and analysed. 10
Water Module
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Group
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
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