Tracer flow model (Water Overlay): Difference between revisions

Revision as of 11:02, 4 December 2020

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 underground, and saturated underground.

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 underground, and the saturated underground.
Water 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 underground, or the saturated underground. Specifically, water can flow through weirs, culverts, pumps, and breaches.
It is currently not possible to initialize grid cells with a specific amount for a substance.
It is currently not possible to emit tracers directly into the unsaturated or saturated underground.
It is currently not possible to decompose tracers in the unsaturated or saturated underground.
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: @@
 __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====
-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====
-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====
-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====
-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===
-* 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.
 * 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==