Tracer flow model (Water Overlay) - Revision history

Frank@tygron.nl at 15:17, 26 January 2024

2024-01-26T15:17:12Z

← Older revision		Revision as of 15:17, 26 January 2024
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	The tracer model can be activated and deactivated by adding or removing the [[Tracer ABCD (Water Overlay)\|appropriate attributes]] to one or more construction in the project area. If no constructions have attributes configured to interact with the quantities of tracers, then no tracers are created or transported.		The tracer model can be activated and deactivated by adding or removing the [[Tracer ABCD (Water Overlay)\|appropriate attributes]] to one or more construction in the project area. If no constructions have attributes configured to interact with the quantities of tracers, then no tracers are created or transported.

	Tracers are stored as an exact amount per grid cell, in three different layers: [[surface model (Water Overlay)\|surface]], unsaturated [[~~underground~~ model (Water Overlay)\|~~underground~~]], and saturated [[~~underground~~ model (Water Overlay)\|~~underground~~]].		Tracers are stored as an exact amount per grid cell, in three different layers: [[surface model (Water Overlay)\|surface]], unsaturated [[ground model (Water Overlay)\|ground layer]], and saturated [[ground model (Water Overlay)\|ground layer]].

	The tracers are generically defined and do not have a set unit or magnitude. Furthermore, at most four different tracers can be added and followed.		The tracers are generically defined and do not have a set unit or magnitude. Furthermore, at most four different tracers can be added and followed.
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	===Notes===		===Notes===
	* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[~~underground~~ model (Water Overlay)\|~~underground~~]], and the saturated [[~~underground~~ model (Water Overlay)\|~~underground~~]].		* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[ground model (Water Overlay)\|ground layer]], and the saturated [[ground model (Water Overlay)\|ground layer]].
	* Tracers can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated ~~underground~~, or the saturated ~~underground~~. Specifically, tracers can flow through {{linkappend\|post= (Water Overlay)\|weir}}s, {{linkappend\|post= (Water Overlay)\|culvert}}s, {{linkappend\|post= (Water Overlay)\|pump}}s, and {{linkappend\|post= (Water Overlay)\|breach}}es.		* Tracers can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated ground layer, or the saturated ground layer. Specifically, tracers can flow through {{linkappend\|post= (Water Overlay)\|weir}}s, {{linkappend\|post= (Water Overlay)\|culvert}}s, {{linkappend\|post= (Water Overlay)\|pump}}s, and {{linkappend\|post= (Water Overlay)\|breach}}es.
	* It is currently not possible to initialize grid cells with a specific amount for a tracer.		* It is currently not possible to initialize grid cells with a specific amount for a tracer.
	* It is currently not possible to emit tracers directly into the unsaturated or saturated [[~~underground~~ model (Water Overlay)\|~~underground~~]].		* It is currently not possible to emit tracers directly into the unsaturated or saturated [[ground model (Water Overlay)\|ground layers]].
	* It is currently not possible to decompose tracers in the unsaturated or saturated [[~~underground~~ model (Water Overlay)\|~~underground~~]].		* It is currently not possible to decompose tracers in the unsaturated or saturated [[ground model (Water Overlay)\|ground layers]].
	* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].		* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].
	* Tracers can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].		* Tracers can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].
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	==Related formulas==		==Related formulas==
	* [[Surface flow formula (Water Overlay)\|Surface flow formula]]		* [[Surface flow formula (Water Overlay)\|Surface flow formula]]
	* [[~~Underground~~ flow formula (Water Overlay)\|~~Underground~~ flow formula]]		* [[Ground flow formula (Water Overlay)\|Ground flow formula]]
	* [[Surface infiltration formula (Water Overlay)\|Surface infiltration formula]]		* [[Surface infiltration formula (Water Overlay)\|Surface infiltration formula]]
	* [[~~Underground~~ infiltration formula (Water Overlay)\|~~Underground~~ infiltration formula]]		* [[Ground infiltration formula (Water Overlay)\|Ground infiltration formula]]

	* [[Culvert formula (Water Overlay)\|Culvert formula]]		* [[Culvert formula (Water Overlay)\|Culvert formula]]
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	==Related models==		==Related models==
	* [[Surface model (Water Overlay)\|Surface model]]		* [[Surface model (Water Overlay)\|Surface model]]
	* [[~~Underground~~ model (Water Overlay)\|~~Underground~~ model]]		* [[Ground model (Water Overlay)\|Ground model]]
	* [[Infiltration model (Water Overlay)\|Infiltration model]]		* [[Infiltration model (Water Overlay)\|Infiltration model]]

	{{WaterOverlay formula nav}}		{{WaterOverlay formula nav}}

Rudolf@tygron.nl: /* Notes */

2021-04-27T09:05:00Z

Notes

← Older revision		Revision as of 09:05, 27 April 2021
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	===Notes===		===Notes===
	* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].		* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].
	* ~~Water~~ can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, ~~water~~ can flow through ~~[[weir~~ (Water Overlay)\|weir]]s, ~~[[culvert~~ (Water Overlay)\|culvert]]s, ~~[[pump~~ (Water Overlay)\|pump]]s, and ~~[[breach~~ (Water Overlay)\|breach]]es.		* Tracers can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, tracers can flow through {{linkappend\|post= (Water Overlay)\|weir}}s, {{linkappend\|post= (Water Overlay)\|culvert}}s, {{linkappend\|post= (Water Overlay)\|pump}}s, and {{linkappend\|post= (Water Overlay)\|breach}}es.
	* It is currently not possible to initialize grid cells with a specific amount for a tracer.		* It is currently not possible to initialize grid cells with a specific amount for a tracer.
	* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].
	* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].
	* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].		* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].
	* ~~tracers~~ can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].		* Tracers can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].

	==Related formulas==		==Related formulas==

Frank@tygron.nl at 11:13, 4 December 2020

2020-12-04T11:13:27Z

← Older revision		Revision as of 11:13, 4 December 2020
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	* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].		* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].
	* Water can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, water can flow through [[weir (Water Overlay)\|weir]]s, [[culvert (Water Overlay)\|culvert]]s, [[pump (Water Overlay)\|pump]]s, and [[breach (Water Overlay)\|breach]]es.		* Water can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, water can flow through [[weir (Water Overlay)\|weir]]s, [[culvert (Water Overlay)\|culvert]]s, [[pump (Water Overlay)\|pump]]s, and [[breach (Water Overlay)\|breach]]es.
	* It is currently not possible to initialize grid cells with a specific amount for a ~~substance~~.		* It is currently not possible to initialize grid cells with a specific amount for a tracer.
	* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].
	* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].

Frank@tygron.nl: Frank@tygron.nl moved page Substance flow model (Water Overlay) to Tracer flow model (Water Overlay) without leaving a redirect

2020-12-04T11:02:12Z

Frank@tygron.nl moved page Substance flow model (Water Overlay) to Tracer flow model (Water Overlay) without leaving a redirect

← Older revision	Revision as of 11:02, 4 December 2020
(No difference)

Frank@tygron.nl at 11:02, 4 December 2020

2020-12-04T11:02:02Z

Rudolf@tygron.nl at 12:07, 14 August 2020

2020-08-14T12:07:15Z

← Older revision		Revision as of 12:07, 14 August 2020
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	* [[Infiltration model (Water Overlay)\|Infiltration model]]		* [[Infiltration model (Water Overlay)\|Infiltration model]]

	{{~~Template:~~WaterOverlay formula nav}}		{{WaterOverlay formula nav}}

Rudolf@tygron.nl at 12:01, 14 August 2020

2020-08-14T12:01:03Z

← Older revision		Revision as of 12:01, 14 August 2020
Line 43:		Line 43:
	* [[Infiltration model (Water Overlay)\|Infiltration model]]		* [[Infiltration model (Water Overlay)\|Infiltration model]]

	{{Template:~~WaterOverlay_formula_nav~~}}		{{Template:WaterOverlay formula nav}}

Rudolf@tygron.nl at 11:59, 14 August 2020

2020-08-14T11:59:29Z

← Older revision		Revision as of 11:59, 14 August 2020
Line 43:		Line 43:
	* [[Infiltration model (Water Overlay)\|Infiltration model]]		* [[Infiltration model (Water Overlay)\|Infiltration model]]

	{{~~WaterOverlay_nav~~}}		{{Template:WaterOverlay_formula_nav}}

Frank@tygron.nl at 16:34, 15 October 2019

2019-10-15T16:34:30Z

← Older revision		Revision as of 16:34, 15 October 2019
Line 44:		Line 44:

	{{WaterOverlay_nav}}		{{WaterOverlay_nav}}
	~~{{Water Module buttons}}~~

Rudolf@tygron.nl: /* Notes */

2019-07-01T11:51:35Z

Notes

← Older revision		Revision as of 11:51, 1 July 2019
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	===Notes===		===Notes===
	* Substances can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].		* Substances can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].
	* Water can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground.		* Water can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, water can flow through [[weir (Water Overlay)\|weir]]s, [[culvert (Water Overlay)\|culvert]]s, [[pump (Water Overlay)\|pump]]s, and [[breach (Water Overlay)\|breach]]es.
	* It is currently not possible to initialize grid cells with a specific amount for a substance.		* It is currently not possible to initialize grid cells with a specific amount for a substance.
	* It is currently not possible to emit substances directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to emit substances directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].

← Older revision		Revision as of 15:17, 26 January 2024
Line 5:		Line 5:
	The tracer model can be activated and deactivated by adding or removing the [[Tracer ABCD (Water Overlay)\|appropriate attributes]] to one or more construction in the project area. If no constructions have attributes configured to interact with the quantities of tracers, then no tracers are created or transported.		The tracer model can be activated and deactivated by adding or removing the [[Tracer ABCD (Water Overlay)\|appropriate attributes]] to one or more construction in the project area. If no constructions have attributes configured to interact with the quantities of tracers, then no tracers are created or transported.

	Tracers are stored as an exact amount per grid cell, in three different layers: [[surface model (Water Overlay)\|surface]], unsaturated [[~~underground~~ model (Water Overlay)\|~~underground~~]], and saturated [[~~underground~~ model (Water Overlay)\|~~underground~~]].		Tracers are stored as an exact amount per grid cell, in three different layers: [[surface model (Water Overlay)\|surface]], unsaturated [[ground model (Water Overlay)\|ground layer]], and saturated [[ground model (Water Overlay)\|ground layer]].

	The tracers are generically defined and do not have a set unit or magnitude. Furthermore, at most four different tracers can be added and followed.		The tracers are generically defined and do not have a set unit or magnitude. Furthermore, at most four different tracers can be added and followed.
Line 19:		Line 19:

	===Notes===		===Notes===
	* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[~~underground~~ model (Water Overlay)\|~~underground~~]], and the saturated [[~~underground~~ model (Water Overlay)\|~~underground~~]].		* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[ground model (Water Overlay)\|ground layer]], and the saturated [[ground model (Water Overlay)\|ground layer]].
	* Tracers can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated ~~underground~~, or the saturated ~~underground~~. Specifically, tracers can flow through {{linkappend\|post= (Water Overlay)\|weir}}s, {{linkappend\|post= (Water Overlay)\|culvert}}s, {{linkappend\|post= (Water Overlay)\|pump}}s, and {{linkappend\|post= (Water Overlay)\|breach}}es.		* Tracers can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated ground layer, or the saturated ground layer. Specifically, tracers can flow through {{linkappend\|post= (Water Overlay)\|weir}}s, {{linkappend\|post= (Water Overlay)\|culvert}}s, {{linkappend\|post= (Water Overlay)\|pump}}s, and {{linkappend\|post= (Water Overlay)\|breach}}es.
	* It is currently not possible to initialize grid cells with a specific amount for a tracer.		* It is currently not possible to initialize grid cells with a specific amount for a tracer.
	* It is currently not possible to emit tracers directly into the unsaturated or saturated [[~~underground~~ model (Water Overlay)\|~~underground~~]].		* It is currently not possible to emit tracers directly into the unsaturated or saturated [[ground model (Water Overlay)\|ground layers]].
	* It is currently not possible to decompose tracers in the unsaturated or saturated [[~~underground~~ model (Water Overlay)\|~~underground~~]].		* It is currently not possible to decompose tracers in the unsaturated or saturated [[ground model (Water Overlay)\|ground layers]].
	* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].		* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].
	* Tracers can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].		* Tracers can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].
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	==Related formulas==		==Related formulas==
	* [[Surface flow formula (Water Overlay)\|Surface flow formula]]		* [[Surface flow formula (Water Overlay)\|Surface flow formula]]
	* [[~~Underground~~ flow formula (Water Overlay)\|~~Underground~~ flow formula]]		* [[Ground flow formula (Water Overlay)\|Ground flow formula]]
	* [[Surface infiltration formula (Water Overlay)\|Surface infiltration formula]]		* [[Surface infiltration formula (Water Overlay)\|Surface infiltration formula]]
	* [[~~Underground~~ infiltration formula (Water Overlay)\|~~Underground~~ infiltration formula]]		* [[Ground infiltration formula (Water Overlay)\|Ground infiltration formula]]

	* [[Culvert formula (Water Overlay)\|Culvert formula]]		* [[Culvert formula (Water Overlay)\|Culvert formula]]
Line 40:		Line 40:
	==Related models==		==Related models==
	* [[Surface model (Water Overlay)\|Surface model]]		* [[Surface model (Water Overlay)\|Surface model]]
	* [[~~Underground~~ model (Water Overlay)\|~~Underground~~ model]]		* [[Ground model (Water Overlay)\|Ground model]]
	* [[Infiltration model (Water Overlay)\|Infiltration model]]		* [[Infiltration model (Water Overlay)\|Infiltration model]]

	{{WaterOverlay formula nav}}		{{WaterOverlay formula nav}}

← Older revision		Revision as of 09:05, 27 April 2021
Line 20:		Line 20:
	===Notes===		===Notes===
	* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].		* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].
	* ~~Water~~ can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, ~~water~~ can flow through ~~[[weir~~ (Water Overlay)\|weir]]s, ~~[[culvert~~ (Water Overlay)\|culvert]]s, ~~[[pump~~ (Water Overlay)\|pump]]s, and ~~[[breach~~ (Water Overlay)\|breach]]es.		* Tracers can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, tracers can flow through {{linkappend\|post= (Water Overlay)\|weir}}s, {{linkappend\|post= (Water Overlay)\|culvert}}s, {{linkappend\|post= (Water Overlay)\|pump}}s, and {{linkappend\|post= (Water Overlay)\|breach}}es.
	* It is currently not possible to initialize grid cells with a specific amount for a tracer.		* It is currently not possible to initialize grid cells with a specific amount for a tracer.
	* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].
	* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].
	* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].		* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].
	* ~~tracers~~ can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].		* Tracers can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].

	==Related formulas==		==Related formulas==

← Older revision		Revision as of 11:13, 4 December 2020
Line 21:		Line 21:
	* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].		* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].
	* Water can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, water can flow through [[weir (Water Overlay)\|weir]]s, [[culvert (Water Overlay)\|culvert]]s, [[pump (Water Overlay)\|pump]]s, and [[breach (Water Overlay)\|breach]]es.		* Water can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, water can flow through [[weir (Water Overlay)\|weir]]s, [[culvert (Water Overlay)\|culvert]]s, [[pump (Water Overlay)\|pump]]s, and [[breach (Water Overlay)\|breach]]es.
	* It is currently not possible to initialize grid cells with a specific amount for a ~~substance~~.		* It is currently not possible to initialize grid cells with a specific amount for a tracer.
	* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].
	* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].

← Older revision		Revision as of 11:02, 4 December 2020
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	__NOTOC__		__NOTOC__
	~~Substances~~ can be modeled in the hydrological model, as quantities dissolved in water and transported by flowing water.		Tracers can be modeled in the hydrological model, as quantities dissolved in water and transported by flowing water.

	====Definition====		====Definition====
	The ~~substance~~ model can be activated and deactivated by adding or removing the [[~~Substance~~ ABCD (Water Overlay)\|appropriate attributes]] to one or more construction in the project area. If no constructions have attributes configured to interact with the quantities of ~~substances~~, then no ~~substances~~ are created or transported.		The tracer model can be activated and deactivated by adding or removing the [[Tracer ABCD (Water Overlay)\|appropriate attributes]] to one or more construction in the project area. If no constructions have attributes configured to interact with the quantities of tracers, then no tracers are created or transported.

	~~Substances~~ are stored as an exact amount per grid cell, in three different layers: [[surface model (Water Overlay)\|surface]], unsaturated [[underground model (Water Overlay)\|underground]], and saturated [[underground model (Water Overlay)\|underground]].		Tracers are stored as an exact amount per grid cell, in three different layers: [[surface model (Water Overlay)\|surface]], unsaturated [[underground model (Water Overlay)\|underground]], and saturated [[underground model (Water Overlay)\|underground]].

	The ~~substances~~ are generically defined and do not have a set unit or magnitude. Furthermore, at most four different ~~substances~~ can be added and followed.		The tracers are generically defined and do not have a set unit or magnitude. Furthermore, at most four different tracers can be added and followed.

	====Creation====		====Creation====
	Conceptually, ~~substances~~ are added to and removed from the hydrological model by [[~~Substance~~ ABCD (Water Overlay)\|~~substance~~ emitters and decomposers]]. The ~~substances~~ created are placed on the [[Surface model (Water Overlay)\|surface]] of the grid cells in which the emitters are present.		Conceptually, tracers are added to and removed from the hydrological model by [[Tracer ABCD (Water Overlay)\|tracer emitters and decomposers]]. The tracers created are placed on the [[Surface model (Water Overlay)\|surface]] of the grid cells in which the emitters are present.

	====Decomposition====		====Decomposition====
	~~Substances~~ can also be decomposed by constructions, if their attributes are configured with a negative value. When ~~substances~~ are present in a cell which contains a ~~substance~~ decomposer, the ~~substances~~ are consequently removed from the hydrological model.		Tracers can also be decomposed by constructions, if their attributes are configured with a negative value. When tracers are present in a cell which contains a tracer decomposer, the tracers are consequently removed from the hydrological model.

	====Transportation====		====Transportation====
	When water moves from a cell which also contains ~~substances~~, the ~~substances~~ are carried along with the water. The ~~substances~~ are expected to be uniformly distributed within the water. In other words, calculations of ~~substance~~ movement is done based on the concentration of that ~~substance~~ in the amount of water that is moved.		When water moves from a cell which also contains tracers, the tracers are carried along with the water. The tracers are expected to be uniformly distributed within the water. In other words, calculations of tracer movement is done based on the concentration of that tracer in the amount of water that is moved.

	===Notes===		===Notes===
	* ~~Substances~~ can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].		* Tracers can flow along with water into and across the [[surface model (Water Overlay)\|surface]], the unsaturated [[underground model (Water Overlay)\|underground]], and the saturated [[underground model (Water Overlay)\|underground]].
	* Water can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, water can flow through [[weir (Water Overlay)\|weir]]s, [[culvert (Water Overlay)\|culvert]]s, [[pump (Water Overlay)\|pump]]s, and [[breach (Water Overlay)\|breach]]es.		* Water can flow through [[Hydraulic structures (Water Overlay)\|hydraulic structures]], unless they remove water from the hydrological model entirely, or move it to a location other than the surface, the unsaturated underground, or the saturated underground. Specifically, water can flow through [[weir (Water Overlay)\|weir]]s, [[culvert (Water Overlay)\|culvert]]s, [[pump (Water Overlay)\|pump]]s, and [[breach (Water Overlay)\|breach]]es.
	* It is currently not possible to initialize grid cells with a specific amount for a substance.		* It is currently not possible to initialize grid cells with a specific amount for a substance.
	* It is currently not possible to emit ~~substances~~ directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to emit tracers directly into the unsaturated or saturated [[underground model (Water Overlay)\|underground]].
	* It is currently not possible to decompose ~~substances~~ in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].		* It is currently not possible to decompose tracers in the unsaturated or saturated [[underground model (Water Overlay)\|underground]].
	* It is currently not possible to let ~~substances~~ flow into and out of the [[sewer model (Water Overlay)\|sewer]].		* It is currently not possible to let tracers flow into and out of the [[sewer model (Water Overlay)\|sewer]].
	* ~~Substances~~ can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].		* tracers can also be used as a tool to [[How to trace water through project area (Water Overlay)\|track water flow]].

	==Related formulas==		==Related formulas==