Water stress (Indicator) - Revision history

Maxim@tygron.com at 16:56, 7 July 2026

2026-07-07T16:56:36Z

← Older revision		Revision as of 16:56, 7 July 2026
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	The Water stress indicator measures the flood resilience of built areas (default: Neighborhoods) by calculating the fraction of the built area that exceeds a preconfigured inundation threshold (default: 0.05 m). ~~Despite it being only a rather simplistic measure, it~~ differentiates well between the more resilient (usually greener) areas and those less capable of dealing with excessive inflow of water.		The Water stress indicator measures the flood resilience of built areas (default: Neighborhoods) by calculating the fraction of the built area that exceeds a preconfigured inundation threshold (default: 0.05 m). It differentiates well between the more resilient (usually greener) areas and those less capable of dealing with excessive inflow of water.

	The indicator can prove especially suitable for:		The indicator can prove especially suitable for:

Frank@tygron.nl at 12:05, 7 July 2026

2026-07-07T12:05:15Z

← Older revision		Revision as of 12:05, 7 July 2026
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	The Water stress indicator ~~yields insight into~~ the flood resilience of built areas (default: Neighborhoods) ~~based on~~ the fraction of ~~total~~ built area in that ~~area which inundates beyond the~~ preconfigured threshold ~~inundation level~~ (default: 0.05 m). Despite it being only a rather simplistic measure, it differentiates well between the more resilient (usually greener) areas and those less capable of dealing with excessive inflow of water.		The Water stress indicator measures the flood resilience of built areas (default: Neighborhoods) by calculating the fraction of the built area that exceeds a preconfigured inundation threshold (default: 0.05 m). Despite it being only a rather simplistic measure, it differentiates well between the more resilient (usually greener) areas and those less capable of dealing with excessive inflow of water.

	The indicator can prove especially suitable for:		The indicator can prove especially suitable for:
	* standardized stress testing, as it provides information on the individual and mean performance of the Neighborhoods after having been exposed to, for instance, an hour-long, 60-mm/h rainfall event.		* standardized stress testing, as it provides information on the individual and mean performance of the Neighborhoods after having been exposed to, for instance, an hour-long, 60-mm/h rainfall event.

	~~The most straightforward measures to~~ improve flood resilience and~~, therefore,~~ the indicator score ~~are~~ local ~~increase of~~ water drainage ~~and/~~or ~~water~~ storage ~~which can be attained~~ by replacing paved ~~(impermeable) surface~~ with ~~green~~ (e.g., grass).		To improve flood resilience and the indicator score, increase local water drainage or storage by replacing impermeable paved surfaces with greenery (e.g., grass).

	By default inundation is measured per Neighborhood and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a Neighborhood). These parameters can be manually changed according to the user's wishes by simply editing the Excel indicator file.		By default inundation is measured per Neighborhood and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a Neighborhood). These parameters can be manually changed according to the user's wishes by simply editing the Excel indicator file.
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	* Road/street area exceeding the inundation threshold (m<sup>2</sup>)		* Road/street area exceeding the inundation threshold (m<sup>2</sup>)

	Note: ~~the~~ rightmost column is ~~nothing more than~~ a ~~narrowed-down version~~ of the 3<sup>rd</sup> column, so its values ~~can never turn out~~ higher.		Note: The rightmost column is a subset of the 3<sup>rd</sup> column; therefore, its values will not be higher.

	===Calculations===		===Calculations===
Line 25:		Line 25:

	===Score===		===Score===
	A progress bar~~, that runs from~~ 0 to 100%~~, keeps~~ the ~~user updated about the current state~~ of the Neighborhoods in ~~their~~ project ~~in terms of flood resilience~~. The indicator score is set to be inversely proportional to the fraction of flooded (i.e., exceeding threshold) to total built area (averaged over the Neighborhoods present in the project). For instance, if on average 21% of the built area exceeds threshold, the score will be set to (100-21=) 79%. The user decides whether they wish to display the [[Indicators#Absolute_score\|absolute or relative score]]. Naturally, a higher score means better flood resilience and vice versa.		A progress bar (0-100%) displays the overall flood resilience of the Neighborhoods in the project. The indicator score is set to be inversely proportional to the fraction of flooded (i.e., exceeding threshold) to total built area (averaged over the Neighborhoods present in the project). For instance, if on average 21% of the built area exceeds threshold, the score will be set to (100-21=) 79%. The user decides whether they wish to display the [[Indicators#Absolute_score\|absolute or relative score]]. Naturally, a higher score means better flood resilience and vice versa.

	Flood resilience is mainly controlled by factors such as water drainage and storage. The easiest way to improve the score is by replacing paved/tarmac surface with green, which will greatly benefit the drainage capacity (i.e., the infiltration rate) of the ground surface. On the other hand, choosing a more porous soil type or implementation of innovative measures, such as green roofs, will contribute to the [[Terrain_water_storage_percentage_(Water_Overlay)\|water storage]].		Flood resilience is mainly controlled by factors such as water drainage and storage. The easiest way to improve the score is by replacing paved/tarmac surface with green, which will greatly benefit the drainage capacity (i.e., the infiltration rate) of the ground surface. On the other hand, choosing a more porous soil type or implementation of innovative measures, such as green roofs, will contribute to the [[Terrain_water_storage_percentage_(Water_Overlay)\|water storage]].

Frank@tygron.nl at 08:30, 6 July 2026

2026-07-06T08:30:52Z

← Older revision		Revision as of 08:30, 6 July 2026
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	The most straightforward measures to improve flood resilience and, therefore, the indicator score are local increase of water drainage and/or water storage which can be attained by replacing paved (impermeable) surface with green (e.g., grass).		The most straightforward measures to improve flood resilience and, therefore, the indicator score are local increase of water drainage and/or water storage which can be attained by replacing paved (impermeable) surface with green (e.g., grass).

	By default inundation is measured per Neighborhood and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a Neighborhood). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.		By default inundation is measured per Neighborhood and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a Neighborhood). These parameters can be manually changed according to the user's wishes by simply editing the Excel indicator file.

	This Excel indicator can be downloaded from the Public [[GeoShare]]. Read on to find out more about the indicator's calculation method and how to set it up in your project.		This Excel indicator can be downloaded from the Public [[GeoShare]]. Read on to find out more about the indicator's calculation method and how to set it up in your project.
Line 22:		Line 22:

	===Calculations===		===Calculations===
	The indicator approximates the built area of a Neighborhood using the [[Tygron Query Language#Construction polygons\|LOTSIZE]] function. Then, it measures the part of that area where water accumulation exceeds the threshold of 0.05 m. Next, the ratio of threshold-exceeding over total built area is multiplied by a 100%. In addition, step 2 is repeated but with the threshold-exceeding built area being replaced by threshold-exceeding roads/streets.		The indicator approximates the built area of a Neighborhood using the [[Tygron Query Language#Construction polygons\|LOTSIZE]] function. Then, it measures the part of that area where water accumulation exceeds the threshold of 0.05 m. Next, the ratio of threshold-exceeding over total built area is multiplied by 100%. In addition, step 2 is repeated but with the threshold-exceeding built area being replaced by threshold-exceeding roads/streets.

	===Score===		===Score===
	A progress bar, that runs from 0 to 100%, keeps the user updated about the current state of the Neighborhoods in their project in terms of flood resilience. The indicator score is set to be inversely proportional to the fraction of flooded (i.e., exceeding threshold) to total built area (averaged over the Neighborhoods present in the project). For instance, if on average 21% of the built area exceeds threshold, the score will be set to (100-21=) 79%. The user decides whether they ~~whish~~ to display the [[Indicators#Absolute_score\|absolute or relative score]]. Naturally, a higher score means better flood resilience and vice versa.		A progress bar, that runs from 0 to 100%, keeps the user updated about the current state of the Neighborhoods in their project in terms of flood resilience. The indicator score is set to be inversely proportional to the fraction of flooded (i.e., exceeding threshold) to total built area (averaged over the Neighborhoods present in the project). For instance, if on average 21% of the built area exceeds threshold, the score will be set to (100-21=) 79%. The user decides whether they wish to display the [[Indicators#Absolute_score\|absolute or relative score]]. Naturally, a higher score means better flood resilience and vice versa.

	Flood resilience is mainly controlled by factors such as water drainage and storage. The easiest way to improve the score is by replacing paved/tarmac surface with green, which will greatly benefit the drainage capacity (i.e., the infiltration rate) of the ground surface. On the other hand, choosing a more porous soil type or implementation of innovative measures, such as green roofs, will contribute to the [[Terrain_water_storage_percentage_(Water_Overlay)\|water storage]].		Flood resilience is mainly controlled by factors such as water drainage and storage. The easiest way to improve the score is by replacing paved/tarmac surface with green, which will greatly benefit the drainage capacity (i.e., the infiltration rate) of the ground surface. On the other hand, choosing a more porous soil type or implementation of innovative measures, such as green roofs, will contribute to the [[Terrain_water_storage_percentage_(Water_Overlay)\|water storage]].
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	==Add the Overlay==		==Add the Overlay==
	{{Editor steps\|title=\|In the Editor select 'Current Situation' from the [[Ribbon#Ribbon overview\|ribbon header]].\|Select ''Overlays'' from the [[Ribbon#Ribbon overview\|ribbon bar]].\|Select ''Add Rainfall'' from the dropdown menu.\|Proceed by implementing a standardized (e.g., 1-h long, 70 mm/h) rainfall event through the Configuration Wizard.\|Hover over the [[Calculation_panel\|Calculation panel]] and choose ~~for~~ Reset to Start values (faster) to update your project.}}		{{Editor steps\|title=\|In the Editor select 'Current Situation' from the [[Ribbon#Ribbon overview\|ribbon header]].\|Select ''Overlays'' from the [[Ribbon#Ribbon overview\|ribbon bar]].\|Select ''Add Rainfall'' from the dropdown menu.\|Proceed by implementing a standardized (e.g., 1-h long, 70 mm/h) rainfall event through the Configuration Wizard.\|Hover over the [[Calculation_panel\|Calculation panel]] and choose 'Reset to Start values' (faster) to update your project.}}

	==Edit the Excel file==		==Edit the Excel file==
	[[File:ID_adjustment.PNG\|thumb\|300px\|right\|Figure 2. The [[ID]]'s in queries can be changed through the Name Manager.]]		[[File:ID_adjustment.PNG\|thumb\|300px\|right\|Figure 2. The [[ID]]'s in queries can be changed through the Name Manager.]]
	In the Excel file the ID of the [[Rainfall (Overlay)\|Rainfall Overlay]] needs to be changed in the TQL queries in cells G9, H9, J9 and K9.		In the Excel file the ID of the [[Rainfall (Overlay)\|Rainfall Overlay]] needs to be changed in the TQL queries in cells G9, H9, J9 and K9.
	{{Editor steps\|title=\|Open the downloaded Excel spreadsheet.\|On the Formulas tab, in the Define Names group, click the Name Manager.\|Edit the 4 names containing GRID_IS_5 and change the [[ID]] to the correct number (Fig. 2).\|For clarity adjust the corresponding cell formulas accordingly.\|Save your changes and [[Excel#Uploading_and_Downloading\| update the indicator file]] in your project.\| Hover over the [[Calculation_panel\|Calculation panel]] and choose ~~for~~ ''Reset X Queries (slower)'' to update your project.}}		{{Editor steps\|title=\|Open the downloaded Excel spreadsheet.\|On the Formulas tab, in the Define Names group, click the Name Manager.\|Edit the 4 names containing GRID_IS_5 and change the [[ID]] to the correct number (Fig. 2).\|For clarity adjust the corresponding cell formulas accordingly.\|Save your changes and [[Excel#Uploading_and_Downloading\| update the indicator file]] in your project.\| Hover over the [[Calculation_panel\|Calculation panel]] and choose ''Reset X Queries (slower)'' to update your project.}}

			{{article end
			\|api=
			* [[Api session items indicators]]
			}}

	{{Indicator nav}}		{{Indicator nav}}
	[[Category:Public GeoShare]]		[[Category:Public GeoShare]]

Frank@tygron.nl at 08:29, 6 July 2026

2026-07-06T08:29:14Z

← Older revision		Revision as of 08:29, 6 July 2026
Line 6:		Line 6:
	The most straightforward measures to improve flood resilience and, therefore, the indicator score are local increase of water drainage and/or water storage which can be attained by replacing paved (impermeable) surface with green (e.g., grass).		The most straightforward measures to improve flood resilience and, therefore, the indicator score are local increase of water drainage and/or water storage which can be attained by replacing paved (impermeable) surface with green (e.g., grass).

	By default ~~the area type under consideration are Neighborhoods~~ and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a Neighborhood). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.		By default inundation is measured per Neighborhood and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a Neighborhood). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.

	This Excel indicator can be downloaded from the Public [[GeoShare]]. Read on to find out more about the indicator's calculation method and how to set it up in your project.		This Excel indicator can be downloaded from the Public [[GeoShare]]. Read on to find out more about the indicator's calculation method and how to set it up in your project.

Frank@tygron.nl at 08:28, 6 July 2026

2026-07-06T08:28:21Z

Hedi@tygron.com: /* Edit the Excel file */

2023-02-03T10:36:43Z

Edit the Excel file

← Older revision		Revision as of 10:36, 3 February 2023
Line 38:		Line 38:
	[[File:ID_adjustment.PNG\|thumb\|300px\|right\|Figure 2. The [[ID]]'s in queries can be changed through the Name Manager.]]		[[File:ID_adjustment.PNG\|thumb\|300px\|right\|Figure 2. The [[ID]]'s in queries can be changed through the Name Manager.]]
	In the Excel file the ID of the [[Rainfall (Overlay)\|Rainfall Overlay]] needs to be changed in the TQL queries in cells G9, H9, J9 and K9.		In the Excel file the ID of the [[Rainfall (Overlay)\|Rainfall Overlay]] needs to be changed in the TQL queries in cells G9, H9, J9 and K9.
	{{Editor steps\|title=\|Open the downloaded Excel spreadsheet ~~from the Index~~.\|On the Formulas tab, in the Define Names group, click the Name Manager.\|Edit the 4 names containing GRID_IS_5 and change the [[ID]] to the correct number (Fig. 2).\|For clarity adjust the corresponding cell formulas accordingly.\|Save your changes and [[Excel#Uploading_and_Downloading\| update the indicator file]] in your project.\| Hover over the [[Calculation_panel\|Calculation panel]] and choose for ''Reset X Queries (slower)'' to update your project.}}		{{Editor steps\|title=\|Open the downloaded Excel spreadsheet.\|On the Formulas tab, in the Define Names group, click the Name Manager.\|Edit the 4 names containing GRID_IS_5 and change the [[ID]] to the correct number (Fig. 2).\|For clarity adjust the corresponding cell formulas accordingly.\|Save your changes and [[Excel#Uploading_and_Downloading\| update the indicator file]] in your project.\| Hover over the [[Calculation_panel\|Calculation panel]] and choose for ''Reset X Queries (slower)'' to update your project.}}
	{{Indicator nav}}		{{Indicator nav}}
	[[Category:Public GeoShare]]		[[Category:Public GeoShare]]

Hedi@tygron.com at 16:10, 2 February 2023

2023-02-02T16:10:43Z

← Older revision		Revision as of 16:10, 2 February 2023
Line 8:		Line 8:
	By default the area type under consideration are neighborhoods and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a neighborhood). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.		By default the area type under consideration are neighborhoods and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a neighborhood). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.

	This Excel indicator can be downloaded from the [~~https://store.tygron.com/product/water-stress-indicator/ Tygron Index~~]. Read on to find out more about the indicator's calculation method and how to set it up in your project.		This Excel indicator can be downloaded from the Public [[GeoShare]]. Read on to find out more about the indicator's calculation method and how to set it up in your project.

	===Indicator panel===		===Indicator panel===
Line 40:		Line 40:
	{{Editor steps\|title=\|Open the downloaded Excel spreadsheet from the Index.\|On the Formulas tab, in the Define Names group, click the Name Manager.\|Edit the 4 names containing GRID_IS_5 and change the [[ID]] to the correct number (Fig. 2).\|For clarity adjust the corresponding cell formulas accordingly.\|Save your changes and [[Excel#Uploading_and_Downloading\| update the indicator file]] in your project.\| Hover over the [[Calculation_panel\|Calculation panel]] and choose for ''Reset X Queries (slower)'' to update your project.}}		{{Editor steps\|title=\|Open the downloaded Excel spreadsheet from the Index.\|On the Formulas tab, in the Define Names group, click the Name Manager.\|Edit the 4 names containing GRID_IS_5 and change the [[ID]] to the correct number (Fig. 2).\|For clarity adjust the corresponding cell formulas accordingly.\|Save your changes and [[Excel#Uploading_and_Downloading\| update the indicator file]] in your project.\| Hover over the [[Calculation_panel\|Calculation panel]] and choose for ''Reset X Queries (slower)'' to update your project.}}
	{{Indicator nav}}		{{Indicator nav}}
	[[Category:~~Index~~]]		[[Category:Public GeoShare]]

Frank@tygron.nl: /* Edit the Excel file */

2023-01-26T08:58:29Z

Edit the Excel file

← Older revision		Revision as of 08:58, 26 January 2023
Line 39:		Line 39:
	In the Excel file the ID of the [[Rainfall (Overlay)\|Rainfall Overlay]] needs to be changed in the TQL queries in cells G9, H9, J9 and K9.		In the Excel file the ID of the [[Rainfall (Overlay)\|Rainfall Overlay]] needs to be changed in the TQL queries in cells G9, H9, J9 and K9.
	{{Editor steps\|title=\|Open the downloaded Excel spreadsheet from the Index.\|On the Formulas tab, in the Define Names group, click the Name Manager.\|Edit the 4 names containing GRID_IS_5 and change the [[ID]] to the correct number (Fig. 2).\|For clarity adjust the corresponding cell formulas accordingly.\|Save your changes and [[Excel#Uploading_and_Downloading\| update the indicator file]] in your project.\| Hover over the [[Calculation_panel\|Calculation panel]] and choose for ''Reset X Queries (slower)'' to update your project.}}		{{Editor steps\|title=\|Open the downloaded Excel spreadsheet from the Index.\|On the Formulas tab, in the Define Names group, click the Name Manager.\|Edit the 4 names containing GRID_IS_5 and change the [[ID]] to the correct number (Fig. 2).\|For clarity adjust the corresponding cell formulas accordingly.\|Save your changes and [[Excel#Uploading_and_Downloading\| update the indicator file]] in your project.\| Hover over the [[Calculation_panel\|Calculation panel]] and choose for ''Reset X Queries (slower)'' to update your project.}}
			{{Indicator nav}}
	[[Category:Index]]		[[Category:Index]]

Maxim@tygron.com at 15:51, 5 October 2022

2022-10-05T15:51:01Z

← Older revision		Revision as of 15:51, 5 October 2022
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	~~{{learned\|what the water stress indicator is\|how the water stress indicator is calculated\| how to adjust your project in order to make the indicator functional.}}~~

	~~==General==~~
	~~===What is the water stress indicator?===~~
	The Water stress indicator yields insight into the flood resilience of built areas (default: neighborhoods) based on the fraction of total built area in that area which inundates beyond the preconfigured threshold inundation level (default: 0.05 m). Despite it being only a rather simplistic measure, it differentiates well between the more resilient (usually greener) areas and those less capable of dealing with excessive inflow of water.		The Water stress indicator yields insight into the flood resilience of built areas (default: neighborhoods) based on the fraction of total built area in that area which inundates beyond the preconfigured threshold inundation level (default: 0.05 m). Despite it being only a rather simplistic measure, it differentiates well between the more resilient (usually greener) areas and those less capable of dealing with excessive inflow of water.

Reijn@tygron.com at 12:34, 18 September 2020

2020-09-18T12:34:11Z

← Older revision		Revision as of 12:34, 18 September 2020
Line 12:		Line 12:
	By default the area type under consideration are neighborhoods and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a neighborhood). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.		By default the area type under consideration are neighborhoods and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a neighborhood). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.

	This Excel indicator can be downloaded from the [https://store.tygron.com/ Tygron Index]. Read on to find out more about the indicator's calculation method and how to set it up in your project.		This Excel indicator can be downloaded from the [https://store.tygron.com/product/water-stress-indicator/ Tygron Index]. Read on to find out more about the indicator's calculation method and how to set it up in your project.

	===Indicator panel===		===Indicator panel===

← Older revision		Revision as of 08:28, 6 July 2026
Line 1:		Line 1:
	The Water stress indicator yields insight into the flood resilience of built areas (default: ~~neighborhoods~~) based on the fraction of total built area in that area which inundates beyond the preconfigured threshold inundation level (default: 0.05 m). Despite it being only a rather simplistic measure, it differentiates well between the more resilient (usually greener) areas and those less capable of dealing with excessive inflow of water.		The Water stress indicator yields insight into the flood resilience of built areas (default: Neighborhoods) based on the fraction of total built area in that area which inundates beyond the preconfigured threshold inundation level (default: 0.05 m). Despite it being only a rather simplistic measure, it differentiates well between the more resilient (usually greener) areas and those less capable of dealing with excessive inflow of water.

	The indicator can prove especially suitable for:		The indicator can prove especially suitable for:
	* standardized stress testing, as it provides information on the individual and mean performance of the ~~neighborhoods~~ after having been exposed to, for instance, an hour-long, 60-mm/h rainfall event.		* standardized stress testing, as it provides information on the individual and mean performance of the Neighborhoods after having been exposed to, for instance, an hour-long, 60-mm/h rainfall event.

	The most straightforward measures to improve flood resilience and, therefore, the indicator score are local increase of water drainage and/or water storage which can be attained by replacing paved (impermeable) surface with green (e.g., grass).		The most straightforward measures to improve flood resilience and, therefore, the indicator score are local increase of water drainage and/or water storage which can be attained by replacing paved (impermeable) surface with green (e.g., grass).

	By default the area type under consideration are ~~neighborhoods~~ and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a ~~neighborhood~~). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.		By default the area type under consideration are Neighborhoods and the inundation threshold is set at 0.05 m (i.e., a 5-cm thick layer of water across the built area of a Neighborhood). These parameters can be manually changed according the user's wishes by simply editing the Excel indicator file.

	This Excel indicator can be downloaded from the Public [[GeoShare]]. Read on to find out more about the indicator's calculation method and how to set it up in your project.		This Excel indicator can be downloaded from the Public [[GeoShare]]. Read on to find out more about the indicator's calculation method and how to set it up in your project.
Line 13:		Line 13:
	[[File:water-stress_panel.PNG\|thumb\|300px\|right\|Figure 1. Water-stress indicator panel (example use case).]]		[[File:water-stress_panel.PNG\|thumb\|300px\|right\|Figure 1. Water-stress indicator panel (example use case).]]
	By default the indicator panel (Fig. 1) displays the following information in the columns from left to right:		By default the indicator panel (Fig. 1) displays the following information in the columns from left to right:
	* Name of the [[~~Neighborhoods\|neighborhood~~]]		* Name of the [[Neighborhood]]s
	* Total built area (m<sup>2</sup>)		* Total built area (m<sup>2</sup>)
	* Built area exceeding the inundation threshold (m<sup>2</sup>)		* Built area exceeding the inundation threshold (m<sup>2</sup>)
Line 22:		Line 22:

	===Calculations===		===Calculations===
	The indicator approximates the built area of a ~~neighborhood~~ using the [[Tygron Query Language#Construction polygons\|LOTSIZE]] function. Then, it measures the part of that area where water accumulation exceeds the threshold of 0.05 m. Next, the ratio of threshold-exceeding over total built area is multiplied by a 100%. In addition, step 2 is repeated but with the threshold-exceeding built area being replaced by threshold-exceeding roads/streets.		The indicator approximates the built area of a Neighborhood using the [[Tygron Query Language#Construction polygons\|LOTSIZE]] function. Then, it measures the part of that area where water accumulation exceeds the threshold of 0.05 m. Next, the ratio of threshold-exceeding over total built area is multiplied by a 100%. In addition, step 2 is repeated but with the threshold-exceeding built area being replaced by threshold-exceeding roads/streets.

	===Score===		===Score===
	A progress bar, that runs from 0 to 100%, keeps the user updated about the current state of the ~~neighborhoods~~ in their project in terms of flood resilience. The indicator score is set to be inversely proportional to the fraction of flooded (i.e., exceeding threshold) to total built area (averaged over the ~~neighborhoods~~ present in the project). For instance, if on average 21% of the built area exceeds threshold, the score will be set to (100-21=) 79%. The user decides whether they whish to display the [[Indicators#Absolute_score\|absolute or relative score]]. Naturally, a higher score means better flood resilience and vice versa.		A progress bar, that runs from 0 to 100%, keeps the user updated about the current state of the Neighborhoods in their project in terms of flood resilience. The indicator score is set to be inversely proportional to the fraction of flooded (i.e., exceeding threshold) to total built area (averaged over the Neighborhoods present in the project). For instance, if on average 21% of the built area exceeds threshold, the score will be set to (100-21=) 79%. The user decides whether they whish to display the [[Indicators#Absolute_score\|absolute or relative score]]. Naturally, a higher score means better flood resilience and vice versa.

	Flood resilience is mainly controlled by factors such as water drainage and storage. The easiest way to improve the score is by replacing paved/tarmac surface with green, which will greatly benefit the drainage capacity (i.e., the infiltration rate) of the ground surface. On the other hand, choosing a more porous soil type or implementation of innovative measures, such as green roofs, will contribute to the [[Terrain_water_storage_percentage_(Water_Overlay)\|water storage]].		Flood resilience is mainly controlled by factors such as water drainage and storage. The easiest way to improve the score is by replacing paved/tarmac surface with green, which will greatly benefit the drainage capacity (i.e., the infiltration rate) of the ground surface. On the other hand, choosing a more porous soil type or implementation of innovative measures, such as green roofs, will contribute to the [[Terrain_water_storage_percentage_(Water_Overlay)\|water storage]].