Heat Stress Module overview - Revision history

Frank@tygron.nl at 13:18, 10 July 2026

2026-07-10T13:18:47Z

← Older revision		Revision as of 13:18, 10 July 2026
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	** Wind direction ([[Wind direction (Heat Stress Overlay)\|hourly]])		** Wind direction ([[Wind direction (Heat Stress Overlay)\|hourly]])
	* Spatial situation, such as:		* Spatial situation, such as:
	** Land use, for fraction vegetation and rate of evaporation ([[Bowen ratio (Heat Stress Overlay)\|Bowen ratio]]).		** Land use, for [[Vegetation fraction (Heat Stress Overlay)\|fraction vegetation]] and rate of evaporation ([[Bowen ratio (Heat Stress Overlay)\|Bowen ratio]]).
	** Terrain, [[Foliage ~~crown factor~~ (Heat Stress Overlay)\|foliage]] and building heights		** Terrain, [[Foliage height (Heat Stress Overlay)\|foliage]] and building heights.

	==Calculation of Physiological Equivalent Temperature==		==Calculation of Physiological Equivalent Temperature==

Frank@tygron.nl at 12:33, 7 July 2026

2026-07-07T12:33:40Z

← Older revision		Revision as of 12:33, 7 July 2026
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	* The [[Sun altitude (Heat Stress Overlay)\|sun altitude]], calculated automatically based on the project area, date and time of day;		* The [[Sun altitude (Heat Stress Overlay)\|sun altitude]], calculated automatically based on the project area, date and time of day;
	* The [[Bowen ratio (Heat Stress Overlay)\|Bowen ratio]], an attribute obtained from Buildings or Terrain on that specific location;		* The [[Bowen ratio (Heat Stress Overlay)\|Bowen ratio]], an attribute obtained from Buildings or Terrain on that specific location;
	* The [[Sky view result type (Heat Stress Overlay)\|sky view factor]], calculated by the [[Sky view factor calculation model (Heat Stress Overlay)\|sky view factor calculation model]].		* The [[Sky view result type (Heat Stress Overlay)\|sky view factor]] and its [[Sky view avg result type (Heat Stress Overlay)\|average]], calculated by the [[Sky view factor calculation model (Heat Stress Overlay)\|sky view factor calculation model]].

	===PET shade and night===		===PET shade and night===
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	* Daily [[Weather station (Heat Stress Overlay)\|weather station]] data		* Daily [[Weather station (Heat Stress Overlay)\|weather station]] data
	* Hourly weather station data		* Hourly weather station data
	* [[Foliage height ~~calculation model~~ (Heat Stress Overlay)\|Foliage height]] (although a [[foliage crown factor (Heat Stress Overlay)\|means of estimation]] is available)		* [[Foliage height (Heat Stress Overlay)\|Foliage height]] (although a [[foliage crown factor (Heat Stress Overlay)\|means of estimation]] is available)

	==See also==		==See also==

Maxim@tygron.com at 15:02, 6 July 2026

2026-07-06T15:02:06Z

← Older revision		Revision as of 15:02, 6 July 2026
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	The [[DPRA Heat Stress Module]] for the [[Heat Stress Overlay]] can be used for heat stress calculations, based on geographical features and locale parameters. The final result is the [[Pet result type (Heat Stress Overlay)\|physiological equivalent temperature]], ~~which is~~ a measure ~~of temperature which takes into account~~ factors ~~which can change~~ the ~~experience~~ and ~~effects~~ of temperature.		The [[DPRA Heat Stress Module]] for the [[Heat Stress Overlay]] can be used for heat stress calculations, based on geographical features and locale parameters. The final result is the [[Pet result type (Heat Stress Overlay)\|physiological equivalent temperature]], a measure that accounts for factors affecting the perception and impact of temperature.

	The module performs these calculations in accordance with the {{Heat DPRA Report}}.		The module performs these calculations in accordance with the {{Heat DPRA Report}}.

Frank@tygron.nl at 11:55, 2 July 2026

2026-07-02T11:55:03Z

← Older revision		Revision as of 11:55, 2 July 2026
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	The module performs these calculations in accordance with the {{Heat DPRA Report}}.		The module performs these calculations in accordance with the {{Heat DPRA Report}}.

	[[File:Overview_Heat_Module.jpg~~\|500px~~]]		[[File:Overview_Heat_Module.jpg]]
	==Input factors==		==Input factors==
	The calculation of the Heat Stress Overlays takes into account:		The calculation of the Heat Stress Overlays takes into account:

Frank@tygron.nl: /* Required information */

2026-07-02T11:54:36Z

Required information

← Older revision		Revision as of 11:54, 2 July 2026
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	* Daily [[Weather station (Heat Stress Overlay)\|weather station]] data		* Daily [[Weather station (Heat Stress Overlay)\|weather station]] data
	* Hourly weather station data		* Hourly weather station data
	* [[Foliage height calculation model (Heat Stress Overlay)\|Foliage height]]s (although a [[foliage crown factor (Heat Stress Overlay)\|means of estimation]] is available)		* [[Foliage height calculation model (Heat Stress Overlay)\|Foliage height]] (although a [[foliage crown factor (Heat Stress Overlay)\|means of estimation]] is available)

	==See also==		==See also==

Frank@tygron.nl at 11:54, 2 July 2026

2026-07-02T11:54:06Z

← Older revision		Revision as of 11:54, 2 July 2026
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	** Global radiation, ([[Hourly radiation (Heat Stress Overlay)\|hourly]] and [[Daily avg radiation (Heat Stress Overlay)\|average]]);		** Global radiation, ([[Hourly radiation (Heat Stress Overlay)\|hourly]] and [[Daily avg radiation (Heat Stress Overlay)\|average]]);
	** Relative humidity ([[Hourly humidity (Heat Stress Overlay)\|hourly]]);		** Relative humidity ([[Hourly humidity (Heat Stress Overlay)\|hourly]]);
	** Wind speeds ([[Wind speed(Heat Stress Overlay)\|hourly]] and [[Daily avg wind speed (Heat Stress Overlay)\|daily average]]).		** Wind speeds ([[Wind speed (Heat Stress Overlay)\|hourly]] and [[Daily avg wind speed (Heat Stress Overlay)\|daily average]]).
	** Wind direction ([[Wind direction (Heat Stress Overlay)\|hourly]])		** Wind direction ([[Wind direction (Heat Stress Overlay)\|hourly]])
	* Spatial situation, such as:		* Spatial situation, such as:

Frank@tygron.nl at 11:53, 2 July 2026

2026-07-02T11:53:55Z

Show changes

Frank@tygron.nl at 14:13, 13 April 2026

2026-04-13T14:13:01Z

← Older revision		Revision as of 14:13, 13 April 2026
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	The [[DPRA Heat Module]] for the [[Heat Stress Overlay]] can be used for heat stress calculations, based on geographical features and locale parameters. The final result is the [[Pet result type (Heat Stress Overlay)\|physiological equivalent temperature]], which is a measure of temperature which takes into account factors which can change the experience and effects of temperature.		The [[DPRA Heat Stress Module]] for the [[Heat Stress Overlay]] can be used for heat stress calculations, based on geographical features and locale parameters. The final result is the [[Pet result type (Heat Stress Overlay)\|physiological equivalent temperature]], which is a measure of temperature which takes into account factors which can change the experience and effects of temperature.

	The module performs these calculations in accordance with the {{Heat DPRA Report}}.		The module performs these calculations in accordance with the {{Heat DPRA Report}}.

Frank@tygron.nl: Frank@tygron.nl moved page Heat Module overview to Heat Stress Module overview

2026-04-13T13:28:45Z

Frank@tygron.nl moved page Heat Module overview to Heat Stress Module overview

← Older revision	Revision as of 13:28, 13 April 2026
(No difference)

Maxim@tygron.com at 12:35, 13 April 2026

2026-04-13T12:35:48Z

← Older revision		Revision as of 11:54, 2 July 2026
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	** Global radiation, ([[Hourly radiation (Heat Stress Overlay)\|hourly]] and [[Daily avg radiation (Heat Stress Overlay)\|average]]);		** Global radiation, ([[Hourly radiation (Heat Stress Overlay)\|hourly]] and [[Daily avg radiation (Heat Stress Overlay)\|average]]);
	** Relative humidity ([[Hourly humidity (Heat Stress Overlay)\|hourly]]);		** Relative humidity ([[Hourly humidity (Heat Stress Overlay)\|hourly]]);
	** Wind speeds ([[Wind speed(Heat Stress Overlay)\|hourly]] and [[Daily avg wind speed (Heat Stress Overlay)\|daily average]]).		** Wind speeds ([[Wind speed (Heat Stress Overlay)\|hourly]] and [[Daily avg wind speed (Heat Stress Overlay)\|daily average]]).
	** Wind direction ([[Wind direction (Heat Stress Overlay)\|hourly]])		** Wind direction ([[Wind direction (Heat Stress Overlay)\|hourly]])
	* Spatial situation, such as:		* Spatial situation, such as:

← Older revision		Revision as of 12:35, 13 April 2026
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	The [[DPRA Heat Module]] for the [[Heat Stress Overlay]] can be used for heat stress calculations, based on geographical features and locale parameters. The final result is the [[Pet result type (Heat Overlay)\|physiological equivalent temperature]], which is a measure of temperature which takes into account factors which can change the experience and effects of temperature.		The [[DPRA Heat Module]] for the [[Heat Stress Overlay]] can be used for heat stress calculations, based on geographical features and locale parameters. The final result is the [[Pet result type (Heat Stress Overlay)\|physiological equivalent temperature]], which is a measure of temperature which takes into account factors which can change the experience and effects of temperature.

	The module performs these calculations in accordance with the {{Heat DPRA Report}}.		The module performs these calculations in accordance with the {{Heat DPRA Report}}.
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	The calculation of the Heat Stress Overlays takes into account:		The calculation of the Heat Stress Overlays takes into account:
	* Meteorological circumstances such as:		* Meteorological circumstances such as:
	** Sun angles, [[Sun_altitude_(~~Heat_Overlay~~)\|altitude]] and [[Sun_azimuth_(~~Heat_Overlay~~)\|azimuth]], dependent on date and time of day and project location.		** Sun angles, [[Sun_altitude_(Heat_Stress_Overlay)\|altitude]] and [[Sun_azimuth_(Heat_Stress_Overlay)\|azimuth]], dependent on date and time of day and project location.
	** Air temperatures, ([[Hourly_temperature_(~~Heat_Overlay~~)\|hourly]], [[Daily_temperature_min_(~~Heat_Overlay~~)\|daily minimum]] and [[Daily_temperature_max_(Heat_Overlay)\|maximum]]);		** Air temperatures, ([[Hourly_temperature_(Heat_Stress_Overlay)\|hourly]], [[Daily_temperature_min_(Heat_Stress_Overlay)\|daily minimum]] and [[Daily_temperature_max_(Heat_Overlay)\|maximum]]);
	** Global radiation, ([[Hourly_radiation_(~~Heat_Overlay~~)\|hourly]] and [[Daily_avg_radiation_(~~Heat_Overlay~~)\|average]]);		** Global radiation, ([[Hourly_radiation_(Heat_Stress_Overlay)\|hourly]] and [[Daily_avg_radiation_(Heat_Stress_Overlay)\|average]]);
	** Relative humidity ([[Hourly_humidity_(~~Heat_Overlay~~)\|hourly]]);		** Relative humidity ([[Hourly_humidity_(Heat_Stress_Overlay)\|hourly]]);
	** Wind speeds ([[Wind_speed_(Heat_Overlay)\|hourly]] and [[Daily_avg_wind_speed_(~~Heat_Overlay~~)\|daily average]]).		** Wind speeds ([[Wind_speed_(Heat_Overlay)\|hourly]] and [[Daily_avg_wind_speed_(Heat_Stress_Overlay)\|daily average]]).
	** Wind direction ([[Wind_direction_(~~Heat_Overlay~~)\|hourly]])		** Wind direction ([[Wind_direction_(Heat_Stress_Overlay)\|hourly]])
	* Spatial situation, such as:		* Spatial situation, such as:
	** Land use, for fraction vegetation and rate of evaporation ([[Bowen_ratio_(~~Heat_Overlay~~)\|Bowen ratio]]).		** Land use, for fraction vegetation and rate of evaporation ([[Bowen_ratio_(Heat_Stress_Overlay)\|Bowen ratio]]).
	** Terrain, [[Foliage_crown_factor_(~~Heat_Overlay~~)\|foliage]] and building heights		** Terrain, [[Foliage_crown_factor_(Heat_Stress_Overlay)\|foliage]] and building heights

	==Calculation of Physiological Equivalent Temperature==		==Calculation of Physiological Equivalent Temperature==
	To calculate the Physiological Equivalent Temperature (PET), we first have to determine which formula (''sun'' or ''shade/night'') should be used.		To calculate the Physiological Equivalent Temperature (PET), we first have to determine which formula (''sun'' or ''shade/night'') should be used.
	It is selected by:		It is selected by:
	* Day or night? Determined by the [[Sun_altitude_(~~Heat_Overlay~~)\|sun altitude angle]];		* Day or night? Determined by the [[Sun_altitude_(Heat_Stress_Overlay)\|sun altitude angle]];
	* Is a cell shaded? Calculated by the [[Shade_calculation_model_(~~Heat_Overlay~~)\|shade calculation model]];		* Is a cell shaded? Calculated by the [[Shade_calculation_model_(Heat_Stress_Overlay)\|shade calculation model]];

	===PET sun===		===PET sun===
	The following factors influence the [[PET_formulas_(~~Heat_Overlay~~)\|Physiological Equivalent Temperature]] for locations directly in the sun:		The following factors influence the [[PET_formulas_(Heat_Stress_Overlay)\|Physiological Equivalent Temperature]] for locations directly in the sun:
	* The [[Temperature_atmosphere_result_type_(~~Heat_Overlay~~)\|atmospheric temperature]], calculated by the [[Temperature_formulas_(~~Heat_Overlay~~)#Atmospheric Temperature formula\|atmospheric temperature formula]];		* The [[Temperature_atmosphere_result_type_(Heat_Stress_Overlay)\|atmospheric temperature]], calculated by the [[Temperature_formulas_(Heat_Stress_Overlay)#Atmospheric Temperature formula\|atmospheric temperature formula]];
	* The [[Hourly_radiation_(Heat_Overlay)\|hourly global radiation]] from the sun, supplied as weather station data;		* The [[Hourly_radiation_(Heat_Overlay)\|hourly global radiation]] from the sun, supplied as weather station data;
	* The [[Wind_speed_result_type_(~~Heat_Overlay~~)\|wind speed]] at 1.2 meter above ground, calculate by the [[Wind_calculation_model_(Heat_Overlay)\|wind speed calculation model]];		* The [[Wind_speed_result_type_(Heat_Stress_Overlay)\|wind speed]] at 1.2 meter above ground, calculate by the [[Wind_calculation_model_(Heat_Overlay)\|wind speed calculation model]];
	* The Wet-Bulb temperature, calculated by the [[Temperature_formulas_(~~Heat_Overlay~~)#Wet-bulb_Temperature_formula\|Wet Bulb temperature formula]];		* The Wet-Bulb temperature, calculated by the [[Temperature_formulas_(Heat_Stress_Overlay)#Wet-bulb_Temperature_formula\|Wet Bulb temperature formula]];
	* The [[Sun_altitude_(~~Heat_Overlay~~)\|sun altitude]], calculated automatically based on the project area, date and time of day;		* The [[Sun_altitude_(Heat_Stress_Overlay)\|sun altitude]], calculated automatically based on the project area, date and time of day;
	* The [[Bowen_ratio_(~~Heat_Overlay~~)\|Bowen ratio]], an attribute obtained from Buildings or Terrain on that specific location;		* The [[Bowen_ratio_(Heat_Stress_Overlay)\|Bowen ratio]], an attribute obtained from Buildings or Terrain on that specific location;
	* The [[Sky_view_result_type_(~~Heat_Overlay~~)\|sky view factor]], calculated by the [[Sky_view_factor_calculation_model_(~~Heat_Overlay~~)\|sky view factor calculation model]].		* The [[Sky_view_result_type_(Heat_Stress_Overlay)\|sky view factor]], calculated by the [[Sky_view_factor_calculation_model_(Heat_Stress_Overlay)\|sky view factor calculation model]].

	===PET shade and night===		===PET shade and night===
	The following factors influence the [[PET_formulas_(~~Heat_Overlay~~)\|Physiological Equivalent Temperature]] for locations directly in the shade or at night:		The following factors influence the [[PET_formulas_(Heat_Stress_Overlay)\|Physiological Equivalent Temperature]] for locations directly in the shade or at night:
	* The [[Temperature_atmosphere_result_type_(~~Heat_Overlay~~)\|atmospheric temperature]], calculated by the [[Temperature_formulas_(~~Heat_Overlay~~)#Atmospheric Temperature formula\|atmospheric temperature formula]];		* The [[Temperature_atmosphere_result_type_(Heat_Stress_Overlay)\|atmospheric temperature]], calculated by the [[Temperature_formulas_(Heat_Stress_Overlay)#Atmospheric Temperature formula\|atmospheric temperature formula]];
	* The [[Wind_speed_result_type_(~~Heat_Overlay~~)\|wind speed]] at 1.2 meter above ground, calculate by the [[wind_calculation_model_(Heat_Overlay)\|Wind speed calculation model]];		* The [[Wind_speed_result_type_(Heat_Stress_Overlay)\|wind speed]] at 1.2 meter above ground, calculate by the [[wind_calculation_model_(Heat_Overlay)\|Wind speed calculation model]];
	* The Wet-Bulb temperature, calculated by the [[Temperature_formulas_(~~Heat_Overlay~~)#Wet-bulb_Temperature_formula\|Wet Bulb temperature formula]];		* The Wet-Bulb temperature, calculated by the [[Temperature_formulas_(Heat_Stress_Overlay)#Wet-bulb_Temperature_formula\|Wet Bulb temperature formula]];
	* The [[Sky_view_result_type_(~~Heat_Overlay~~)\|sky view factor]], calculated by the [[Sky_view_factor_calculation_model_(~~Heat_Overlay~~)\|sky view factor calculation model]].		* The [[Sky_view_result_type_(Heat_Stress_Overlay)\|sky view factor]], calculated by the [[Sky_view_factor_calculation_model_(Heat_Stress_Overlay)\|sky view factor calculation model]].
	* The diffuse radiation, calculated by the [[Diffuse_radiation_formula_(~~Heat_Overlay~~)\|diffuse radiation formula]].		* The diffuse radiation, calculated by the [[Diffuse_radiation_formula_(Heat_Stress_Overlay)\|diffuse radiation formula]].

	==Required information==		==Required information==
	In order to configure the [[Heat Overlay]] accurately additional data needs to be loaded in:		In order to configure the [[Heat Stress Overlay]] accurately additional data needs to be loaded in:
	* [[Dates (Heat Overlay)\|Date(s) and time of day]]. Also multiple consecutive days can be used. Each day-hour combination will become a result.		* [[Dates (Heat Stress Overlay)\|Date(s) and time of day]]. Also multiple consecutive days can be used. Each day-hour combination will become a result.
	* Daily [[Weather station (Heat Overlay)\|weather station]] data		* Daily [[Weather station (Heat Stress Overlay)\|weather station]] data
	* Hourly weather station data		* Hourly weather station data
	* [[Foliage height calculation model (Heat Overlay)\|Foliage height]]s (although a [[foliage crown factor (Heat Overlay)\|means of estimation]] is available)		* [[Foliage height calculation model (Heat Stress Overlay)\|Foliage height]]s (although a [[foliage crown factor (Heat Stress Overlay)\|means of estimation]] is available)

	==See also==		==See also==
	* [[Getting started (Heat Overlay)]]		* [[Getting started (Heat Stress Overlay)]]
	* [[Heat Stress Overlay Wizard]]		* [[Heat Stress Overlay Wizard]]
	* [[Calculation models and formulas (Heat Overlay)]]		* [[Calculation models and formulas (Heat Stress Overlay)]]

	<!--		<!--
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	For each day, and for each time of day, the following will be automatically generated when using the wizard:		For each day, and for each time of day, the following will be automatically generated when using the wizard:
	# The day and time pairs, along with the project location, will be used to automatically calculate the sun altitude and azimuth angles for each day-time pair.		# The day and time pairs, along with the project location, will be used to automatically calculate the sun altitude and azimuth angles for each day-time pair.
	# The [[Sun_daily_motion_(~~Heat_Overlay~~)\|sun daily motion factor]] is a parameter used in the atmospheric temperature formula. It will be automatically selected from the sun motion factor table, based on the date (column) and time of day (row).		# The [[Sun_daily_motion_(Heat_Stress_Overlay)\|sun daily motion factor]] is a parameter used in the atmospheric temperature formula. It will be automatically selected from the sun motion factor table, based on the date (column) and time of day (row).

	====Weather station data====		====Weather station data====