Water Overlay: Difference between revisions
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(Created page with "{{learned|what the Water Overlays are|how to configure the Water Overlays}} ==What are the Water Overlays== With the Water Overlays the following overlays are meant: * Rain...") |
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Each of these overlays have some common configuration steps which will be described on this page. | Each of these overlays have some common configuration steps which will be described on this page. | ||
==Result types== | |||
Each Water Overlay is a [[grid overlay]] showing results on the surface (flooding), sub-surface (groundwater), open water and sewer system. The following results are produced: | |||
{| class="wikitable" | |||
! Result type | |||
! Unit | |||
! Description | |||
|- | |||
|BASE_GROUNDWATER_DISTANCE | |||
|m (below surface) | |||
|Initial groundwater level relative to the surface level (NL: ontwateringsdiepte). | |||
|- | |||
|BASE_TYPES | |||
|nominal value | |||
|Division of gridcells in water, land or sewer areas that are connected to the sewer. | |||
|-f | |||
|EVAPORATED | |||
|m (mm)¹ | |||
|Total evaporation over the simulation period | |||
|- | |||
|IMPACTED_BUILDINGS | |||
|nominal value | |||
|Constructions impacted by flood: the value from the function value indicator is assigned to a building if the water depth at a grid-cell surrounding the building exceeds the overlay attribute value IMPACT_FLOOD_TRESHOLD_M | |||
|- | |||
|SEWER_LAST_VALUE | |||
|m (mm)¹ | |||
|The amount of water in the sewer storage at the end of simulation | |||
|- | |||
|SEWER_MAX_VALUE | |||
|m (mm)¹ | |||
|Maximum amount of water in the sewer storage during the simulation | |||
|- | |||
|SURFACE_DURATION | |||
|s (min)¹ | |||
|The amount of time the water depth in a cell exceeds the value set in the overlay attribute value SHOW_DURATION_FLOOD_LEVEL_M | |||
|- | |||
|SURFACE_FLOW | |||
|m3/m2 | |||
|Total volume of water passed a grid-cell, scaled by the cell surface (grid cell-size^2) | |||
|- | |||
|SURFACE_LAST_VALUE | |||
|m (min)¹ | |||
|Water depth at the end of simulation | |||
|- | |||
|SURFACE_MAX_VALUE | |||
|m (min)¹ | |||
|Maximum water depth during the simulation | |||
|- | |||
|UNDERGROUND_FLOW | |||
|m³/m² | |||
|Totall infiltration amount from the surface to groundwater | |||
|- | |||
|UNDERGROUND_LAST_VALUE | |||
|m (mm) | |||
|The amount by which the groundwater table has risen above the initial groundwater level at the end of simulation | |||
|- | |||
|UNDERGROUND_MAX_VALUE | |||
|m (mm) | |||
|The maximum amount by which the groundwater table has risen above the initial groundwater during the simulation | |||
|- | |||
|WATER_STRESS | |||
|m (mm) | |||
|The Maximum water depth during the simulation. At water cells only a water depth is shown if the depth exceeds the overlay attribute value ALLOWED_WATER_INCREASE_M | |||
|} | |||
¹ the units between () are as displayed in the 3D client. If exported to GTiff the SI-convention is used: meters (m) and seconds (s). | |||
Revision as of 13:47, 27 September 2018
What are the Water Overlays
With the Water Overlays the following overlays are meant:
Each of these overlays have some common configuration steps which will be described on this page.
Result types
Each Water Overlay is a grid overlay showing results on the surface (flooding), sub-surface (groundwater), open water and sewer system. The following results are produced:
| Result type | Unit | Description |
|---|---|---|
| BASE_GROUNDWATER_DISTANCE | m (below surface) | Initial groundwater level relative to the surface level (NL: ontwateringsdiepte). |
| BASE_TYPES | nominal value | Division of gridcells in water, land or sewer areas that are connected to the sewer. |
| EVAPORATED | m (mm)¹ | Total evaporation over the simulation period |
| IMPACTED_BUILDINGS | nominal value | Constructions impacted by flood: the value from the function value indicator is assigned to a building if the water depth at a grid-cell surrounding the building exceeds the overlay attribute value IMPACT_FLOOD_TRESHOLD_M |
| SEWER_LAST_VALUE | m (mm)¹ | The amount of water in the sewer storage at the end of simulation |
| SEWER_MAX_VALUE | m (mm)¹ | Maximum amount of water in the sewer storage during the simulation |
| SURFACE_DURATION | s (min)¹ | The amount of time the water depth in a cell exceeds the value set in the overlay attribute value SHOW_DURATION_FLOOD_LEVEL_M |
| SURFACE_FLOW | m3/m2 | Total volume of water passed a grid-cell, scaled by the cell surface (grid cell-size^2) |
| SURFACE_LAST_VALUE | m (min)¹ | Water depth at the end of simulation |
| SURFACE_MAX_VALUE | m (min)¹ | Maximum water depth during the simulation |
| UNDERGROUND_FLOW | m³/m² | Totall infiltration amount from the surface to groundwater |
| UNDERGROUND_LAST_VALUE | m (mm) | The amount by which the groundwater table has risen above the initial groundwater level at the end of simulation |
| UNDERGROUND_MAX_VALUE | m (mm) | The maximum amount by which the groundwater table has risen above the initial groundwater during the simulation |
| WATER_STRESS | m (mm) | The Maximum water depth during the simulation. At water cells only a water depth is shown if the depth exceeds the overlay attribute value ALLOWED_WATER_INCREASE_M |
¹ the units between () are as displayed in the 3D client. If exported to GTiff the SI-convention is used: meters (m) and seconds (s).