Tracer flow model (Water Overlay): Difference between revisions

Latest revision as of 15:17, 26 January 2024

Tracers can be modeled in the hydrological model, as quantities dissolved in water and transported by flowing water.

Definition

The tracer model can be activated and deactivated by adding or removing the 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, unsaturated ground layer, and saturated 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.

Creation

Conceptually, tracers are added to and removed from the hydrological model by tracer emitters and decomposers. The tracers created are placed on the surface of the grid cells in which the emitters are present.

Decomposition

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

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

Tracers can flow along with water into and across the surface, the unsaturated ground layer, and the saturated ground layer.
Tracers can flow through 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 weirs, culverts, pumps, and breaches.
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 ground layers.
It is currently not possible to decompose tracers in the unsaturated or saturated ground layers.
It is currently not possible to let tracers flow into and out of the sewer.
Tracers can also be used as a tool to track water flow.

Related formulas

Related models

Models

Surface • Ground • Rain • Evaporation • Infiltration • Elevation • Breach • Sewer • Storage • Tracer flow • Border • Order
Model formulas

Timestep • Season • Surface water level • Groundwater level
Flow formulas

Surface flow • Surface infiltration • Ground flow • Ground infiltration • Surface evaporation • Ground evaporation • Ground bottom flow
Hydraulic structure formulas

Culvert • Weir • Breach growth • Breach flow • Pump • Sewer Overflow • Inlet • Drainage
Related

Building attributes • Hydrological features • Hydraulic structures • Terrain attributes • Model attributes • Results • Simulation data

@@ Line 1: / Line 1: @@
-Chemicals can be modeled in the hydrological model, as quantities picked up and carried along with the water.
+__NOTOC__
+Tracers can be modeled in the hydrological model, as quantities dissolved in water and transported by flowing water.
-The chemical model can be implicitly activated and deactivated by having construction in the project area have the appropriate attributes configured. If no constructions have attributes configured to interact with the quantities of chemicals, then no chemicals are computed.
+====Definition====
+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.
-Chemicals are tracked as an exact amount on a given location. The substances are generically defined and do not have a set unit or magnitude.
+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]].
-Chemicals are added to the hydrological model and removed from the hydrological model by [[Substance ABCD (Water Overlay)|chemical emitters and decomposers]]. The chemicals created are then placed on the [[Surface model (Water Overlay)|surface]] of the cells where they are created. Chemicals can also be removed by chemical constructions, if their attributes are configured appropriately. When chemicals enter the cell which contains a chemical decomposer, the chemicals are removed from the hydrological model.
+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.
-When water moves from a cell which also contains chemicals, the chemicals are carried along with the water. The chemicals are uniformly distributed between the water which remains in the cell, which flows to other cells, and which infiltrates. Water which flows into the sewer explicitly cannot carry chemicals along with it.
+====Creation====
+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.
-{{Template:WaterOverlay_nav}}
+====Decomposition====
+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====
+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===
+* 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 ground layer, or the saturated ground layer. Specifically, tracers can flow through {{linkappend|post=&nbsp;(Water Overlay)|weir}}s, {{linkappend|post=&nbsp;(Water Overlay)|culvert}}s, {{linkappend|post=&nbsp;(Water Overlay)|pump}}s, and {{linkappend|post=&nbsp;(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 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 [[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]].
+* Tracers can also be used as a tool to [[How to trace water through project area (Water Overlay)|track water flow]].
+==Related formulas==
+* [[Surface flow formula (Water Overlay)|Surface flow formula]]
+* [[Ground flow formula (Water Overlay)|Ground flow formula]]
+* [[Surface infiltration formula (Water Overlay)|Surface infiltration formula]]
+* [[Ground infiltration formula (Water Overlay)|Ground infiltration formula]]
+* [[Culvert formula (Water Overlay)|Culvert formula]]
+* [[Weir formula (Water Overlay)|Weir formula]]
+* [[Breach flow formula (Water Overlay)|Breach flow formula]]
+* [[Pump formula (Water Overlay)|Pump formula]]
+==Related models==
+* [[Surface model (Water Overlay)|Surface model]]
+* [[Ground model (Water Overlay)|Ground model]]
+* [[Infiltration model (Water Overlay)|Infiltration model]]
+{{WaterOverlay formula nav}}