Advection Dispersion Modelling - Revision history

Emilie Nielsen: /* Introduction */

2026-04-20T00:57:19Z

Introduction

← Older revision		Revision as of 10:57, 20 April 2026
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	TUFLOW AD is specifically oriented towards such analyses in systems including coastal waters, estuaries, rivers, floodplains and urban areas. The AD functionality is discussed in detail in the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual - Chapter 9]</u>.		TUFLOW AD is specifically oriented towards such analyses in systems including coastal waters, estuaries, rivers, floodplains and urban areas. The AD functionality is discussed in detail in the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual - Chapter 9]</u>.

			TUFLOW FV also has Advection Dispersion functionality. In many cases, it's preferable to use TUFLOW FV for AD modelling due to its functionality with flexible mesh. See the <u>[https://docs.tuflow.com/fv/manual/latest/ TUFLOW FV Manual]</u> for details.

	=Model Development=		=Model Development=

Tuflowduncan at 08:17, 24 March 2026

2026-03-24T08:17:41Z

Show changes

Emilie Nielsen: /* Can the Advection Dispersion module simulate pollutant runoff and transport from catchments? */

2026-03-02T01:16:24Z

Can the Advection Dispersion module simulate pollutant runoff and transport from catchments?

← Older revision		Revision as of 11:16, 2 March 2026
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	Pollutants can be generated based on modelled bed shear stress, then transported through the domain using the flow field. The model can also apply decay and settling rates as part of the simulation.		Pollutants can be generated based on modelled bed shear stress, then transported through the domain using the flow field. The model can also apply decay and settling rates as part of the simulation.

			The TUFLOW CATCH module is recommended to simulate pollutant runoff and transport from catchments. See the <u>[https://www.tuflow.com/products/tuflow-catch-module/ TUFLOW Website]</u> for further information.

	<br>{{Tips Navigation		<br>{{Tips Navigation

Emilie Nielsen: /* Introduction */

2026-03-02T01:01:49Z

Introduction

← Older revision		Revision as of 11:01, 2 March 2026
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	TUFLOW’s Advection Dispersion (AD) Module is an extension of the TUFLOW Classic/HPC engines. It adds to the hydrodynamic capabilities of TUFLOW Classic/HPC by simulating depth-averaged, two and one-dimensional constituent fate and transport. An example of such a constituent might include salinity. Both dissolved and particulate constituents can be simulated. TUFLOW AD takes depth and velocity fields computed by the TUFLOW Classic and HPC solvers and uses this information, together with initial and boundary conditions, to simulate the advection and dispersion of user-defined constituents.		TUFLOW’s Advection Dispersion (AD) Module is an extension of the TUFLOW Classic/HPC engines. It adds to the hydrodynamic capabilities of TUFLOW Classic/HPC by simulating depth-averaged, two and one-dimensional constituent fate and transport. An example of such a constituent might include salinity. Both dissolved and particulate constituents can be simulated. TUFLOW AD takes depth and velocity fields computed by the TUFLOW Classic and HPC solvers and uses this information, together with initial and boundary conditions, to simulate the advection and dispersion of user-defined constituents.

	TUFLOW AD is specifically oriented towards such analyses in systems including coastal waters, estuaries, rivers, floodplains and urban areas. The AD module is discussed in detail in the <u>[https://docs.tuflow.com/classic-hpc/manual/~~2025.0~~/~~AD-1.html~~ TUFLOW Manual - ~~Advection Dispersion~~ ~~Section~~]</u>.		TUFLOW AD is specifically oriented towards such analyses in systems including coastal waters, estuaries, rivers, floodplains and urban areas. The AD module is discussed in detail in the <u>[https://docs.tuflow.com/classic-hpc/manual/latest/ TUFLOW Manual - Chapter 9]</u>.

	=Model Development=		=Model Development=

Anne.Kolega at 06:19, 25 February 2026

2026-02-25T06:19:20Z

← Older revision		Revision as of 16:19, 25 February 2026
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	~~''Italic text''~~=Introduction=		=Introduction=
	TUFLOW’s Advection Dispersion (AD) Module is an extension of the TUFLOW Classic/HPC engines. It adds to the hydrodynamic capabilities of TUFLOW Classic/HPC by simulating depth-averaged, two and one-dimensional constituent fate and transport. An example of such a constituent might include salinity. Both dissolved and particulate constituents can be simulated. TUFLOW AD takes depth and velocity fields computed by the TUFLOW Classic and HPC solvers and uses this information, together with initial and boundary conditions, to simulate the advection and dispersion of user-defined constituents.		TUFLOW’s Advection Dispersion (AD) Module is an extension of the TUFLOW Classic/HPC engines. It adds to the hydrodynamic capabilities of TUFLOW Classic/HPC by simulating depth-averaged, two and one-dimensional constituent fate and transport. An example of such a constituent might include salinity. Both dissolved and particulate constituents can be simulated. TUFLOW AD takes depth and velocity fields computed by the TUFLOW Classic and HPC solvers and uses this information, together with initial and boundary conditions, to simulate the advection and dispersion of user-defined constituents.

Anne.Kolega: /* Setting Up a New Model */

2026-02-23T23:53:12Z

Setting Up a New Model

← Older revision		Revision as of 09:53, 24 February 2026
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	<li>Set up the boundary condition tables (.csv file(s)) to define the time-varying constituent concentrations at any input boundaries.		<li>Set up the boundary condition tables (.csv file(s)) to define the time-varying constituent concentrations at any input boundaries.
	<ul><li>Set up the constituent boundary condition table(s) in the “bc_dbase” folder . For example in the below, the time-varying concentration of constituents Conc_AD1 and Conc_AD2 are set:<br>		<ul><li>Set up the constituent boundary condition table(s) in the “bc_dbase” folder. For example in the below, the time-varying concentration of constituents Conc_AD1 and Conc_AD2 are set:<br>
	[[File:EG17 conc 001.png]]<br></ul>		[[File:EG17 conc 001.png]]<br></ul>
	<li>Set up up the boundary condition database (.csv file)		<li>Set up up the boundary condition database (.csv file)

Anne.Kolega: /* Introduction */

2026-02-23T23:50:43Z

Introduction

← Older revision		Revision as of 09:50, 24 February 2026
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	=Introduction=		''Italic text''=Introduction=
	TUFLOW’s Advection Dispersion (AD) Module is an extension of the TUFLOW Classic/HPC engines. It adds to the hydrodynamic capabilities of TUFLOW Classic/HPC by simulating depth-averaged, two and one-dimensional constituent fate and transport. An example of such a constituent might include salinity. Both dissolved and particulate constituents can be simulated. TUFLOW AD takes depth and velocity fields computed by the TUFLOW Classic and HPC solvers and uses this information, together with initial and boundary conditions, to simulate the advection and dispersion of user-defined constituents.		TUFLOW’s Advection Dispersion (AD) Module is an extension of the TUFLOW Classic/HPC engines. It adds to the hydrodynamic capabilities of TUFLOW Classic/HPC by simulating depth-averaged, two and one-dimensional constituent fate and transport. An example of such a constituent might include salinity. Both dissolved and particulate constituents can be simulated. TUFLOW AD takes depth and velocity fields computed by the TUFLOW Classic and HPC solvers and uses this information, together with initial and boundary conditions, to simulate the advection and dispersion of user-defined constituents.

	TUFLOW AD is specifically oriented towards such analyses in systems including coastal waters, estuaries, rivers, floodplains and urban areas. The AD module is discussed in detail in the [https://~~downloads~~.tuflow.com/~~TUFLOW/Releases/2020~~-10/~~TUFLOW%20AD%20Manual~~.~~2020~~-~~10-AF~~.~~pdf~~ TUFLOW Advection Dispersion ~~Manual~~].		TUFLOW AD is specifically oriented towards such analyses in systems including coastal waters, estuaries, rivers, floodplains and urban areas. The AD module is discussed in detail in the <u>[https://docs.tuflow.com/classic-hpc/manual/2025.0/AD-1.html TUFLOW Manual - Advection Dispersion Section]</u>.

	=Model Development=		=Model Development=

Abrar.Alttahir: /* Can the Advection Dispersion module simulate pollutant runoff and transport from catchments? */

2025-05-30T05:34:37Z

Can the Advection Dispersion module simulate pollutant runoff and transport from catchments?

← Older revision		Revision as of 15:34, 30 May 2025
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	Yes, the Advection Dispersion module can also be used to simulate pollutant runoff from catchments. This includes modelling the generation, transport, and fate of pollutants such as suspended sediment, nitrogen, and phosphorus.		Yes, the Advection Dispersion module can also be used to simulate pollutant runoff from catchments. This includes modelling the generation, transport, and fate of pollutants such as suspended sediment, nitrogen, and phosphorus.

	Pollutants can be generated based on modelled bed shear stress, then transported through the domain using the flow field. The model can also apply decay and settling rates as part of the simulation.~~<br>{{Tips Navigation~~		Pollutants can be generated based on modelled bed shear stress, then transported through the domain using the flow field. The model can also apply decay and settling rates as part of the simulation.

			<br>{{Tips Navigation
	\|uplink=[[ TUFLOW_Modelling_Guidance \| Back to TUFLOW Modelling Guidance]]		\|uplink=[[ TUFLOW_Modelling_Guidance \| Back to TUFLOW Modelling Guidance]]
	}}		}}

Abrar.Alttahir: /* Can the Advection Dispersion module be used in a fixed grid TUFLOW HPC or SGS model to simulate salinity? */

2025-05-30T05:30:09Z

Can the Advection Dispersion module be used in a fixed grid TUFLOW HPC or SGS model to simulate salinity?

← Older revision		Revision as of 15:30, 30 May 2025
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	These limitations mean that while the AD module can be used in models with 1D elements, it does not fully capture the complexities of non-Newtonian fluid behaviour in those elements. If higher accuracy is required, 2D elements where non-Newtonian properties are more comprehensively represented may be considered.		These limitations mean that while the AD module can be used in models with 1D elements, it does not fully capture the complexities of non-Newtonian fluid behaviour in those elements. If higher accuracy is required, 2D elements where non-Newtonian properties are more comprehensively represented may be considered.

	== Can the Advection Dispersion module be used in a ~~fixed grid TUFLOW HPC or SGS~~ model to simulate salinity? ==		== Can the Advection Dispersion module be used in a model to simulate salinity? ==
	Yes, the Advection Dispersion ~~(AD)~~ module can be used with ~~fixed grid TUFLOW HPC and SGS~~ models to simulate salinity transport, as long as the system is relatively well mixed vertically.		Yes, the Advection Dispersion module can be used with models to simulate salinity transport, as long as the system is relatively well mixed vertically.

	TUFLOW HPC is a 2D shallow water equation solver, so it does not account for vertical salinity gradients. This means it is best suited for rivers, shallow lakes, and estuaries where haloclines are weak or absent. Different boundary inflows can be assigned varying time series of salinity concentrations, and the module will simulate how these mix over space and time.		TUFLOW HPC is a 2D shallow water equation solver, so it does not account for vertical salinity gradients. This means it is best suited for rivers, shallow lakes, and estuaries where haloclines are weak or absent. Different boundary inflows can be assigned varying time series of salinity concentrations, and the module will simulate how these mix over space and time.
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	If the system has strong density stratification or distinctly three dimensional flow behaviour, a fully 3D solver such as TUFLOW FV is recommended.		If the system has strong density stratification or distinctly three dimensional flow behaviour, a fully 3D solver such as TUFLOW FV is recommended.

	== Can ~~TUFLOW~~ ~~HPC~~ simulate pollutant runoff and transport from catchments? ==		== Can the Advection Dispersion module simulate pollutant runoff and transport from catchments? ==
	Yes, ~~TUFLOW HPC’s~~ Advection Dispersion ~~(AD)~~ module can also be used to simulate pollutant runoff from catchments. This includes modelling the generation, transport, and fate of pollutants such as suspended sediment, nitrogen, and phosphorus.		Yes, the Advection Dispersion module can also be used to simulate pollutant runoff from catchments. This includes modelling the generation, transport, and fate of pollutants such as suspended sediment, nitrogen, and phosphorus.

	Pollutants can be generated based on modelled bed shear stress, then transported through the domain using the flow field. The model can also apply decay and settling rates as part of the simulation.		Pollutants can be generated based on modelled bed shear stress, then transported through the domain using the flow field. The model can also apply decay and settling rates as part of the simulation.<br>{{Tips Navigation

	For more complex water quality modelling needs, contact TUFLOW Support (support@tuflow.com) for guidance on best practices.<br>
	{{Tips Navigation
	\|uplink=[[ TUFLOW_Modelling_Guidance \| Back to TUFLOW Modelling Guidance]]		\|uplink=[[ TUFLOW_Modelling_Guidance \| Back to TUFLOW Modelling Guidance]]
	}}		}}

Abrar.Alttahir: /* Can TUFLOW HPC simulate pollutant runoff and transport from catchments? */

2025-05-30T04:39:20Z

Can TUFLOW HPC simulate pollutant runoff and transport from catchments?

← Older revision		Revision as of 14:39, 30 May 2025
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	== Can TUFLOW HPC simulate pollutant runoff and transport from catchments? ==		== Can TUFLOW HPC simulate pollutant runoff and transport from catchments? ==
	Yes, TUFLOW HPC’s Advection Dispersion module can also be used to simulate pollutant runoff from catchments. This includes modelling the generation, transport, and fate of pollutants such as suspended sediment, nitrogen, and phosphorus.		Yes, TUFLOW HPC’s Advection Dispersion (AD) module can also be used to simulate pollutant runoff from catchments. This includes modelling the generation, transport, and fate of pollutants such as suspended sediment, nitrogen, and phosphorus.

	Pollutants can be generated based on modelled bed shear stress, then transported through the domain using the flow field. The model can also apply decay and settling rates as part of the simulation.		Pollutants can be generated based on modelled bed shear stress, then transported through the domain using the flow field. The model can also apply decay and settling rates as part of the simulation.