Process representation across tools - Revision history

Julia Glenday at 14:37, 1 December 2023

2023-12-01T14:37:41Z

Julia Glenday at 13:59, 27 November 2023

2023-11-27T13:59:50Z

Julia Glenday at 12:51, 27 November 2023

2023-11-27T12:51:33Z

Julia Glenday at 12:49, 27 November 2023

2023-11-27T12:49:05Z

Julia Glenday: /* Interflow generation & routing to channel network */

2023-11-27T12:20:28Z

Interflow generation & routing to channel network

Julia Glenday at 12:19, 27 November 2023

2023-11-27T12:19:19Z

Julia Glenday: /* Interflow generation & routing to channel network */

2023-11-27T12:14:41Z

Interflow generation & routing to channel network

Julia Glenday at 10:48, 27 November 2023

2023-11-27T10:48:07Z

Julia Glenday: /* Aquifer recharge */

2023-11-27T10:47:07Z

Aquifer recharge

Julia Glenday: /* Aquifer recharge */

2023-11-27T10:46:55Z

Aquifer recharge

@@ Line 9: / Line 9: @@
 * states or water storage levels that the model calculated internally for the timestep, so not directly input by the user (e.g., soil moisture content in a certain soil layer at a given timestep)
 Different software tools may refer to equivalent inputs using different words and sometimes they require the user to input different specific property values, but end up calculating the same derived property. For example, on software tool may require porosity of soil to be input, another may require bulk density, and another may as for volumetric soil moisture at saturation, any of these, coupled with soil layer depth, can be used to calculate the maximum (or saturation) soil water storage volume. Where possible, similar terms have been used across tools in the tables below to highlight their conceptual similarities where these exist.  Details about some of the contrasting terminology used in the interfaces of different tools can be found [[Terminology#Hydrological process and parameter terms across tools|here]].
-</br></br>
+</br>

@@ Line 1: / Line 1: @@
 <span id="Process rep - pg top"></span>
-The tables below summarise information about various process representation [[Terminology#algorithm anchor|algorithms]] across the set of tools. They cover the inputs used to model the occurrence and rate (amount per model calculation timestep) of the listed process (e.g. infiltration of water into the soil) and some general characteristics of the equations, particularly if there are thresholds involved and what these are. The tables can be used to understand what is being considered in the calculation of each process and what inputs each modelling tool needs. Not all the processes listed are represented explicitly by all the tools. This is highlighted in the tables below and an overview is also presented in the [[Modelling tool capability overview#Modelling tool capabilities summary|capabilities overview table]]. The nature of the algorithms used and their inputs are linked to the '''spatial and temporal scale''' at which the process is being represented in the given tool, described further for each one [[Model units & connections|here]].
+The tables below summarise information about different process representation [[Terminology#algorithm anchor|algorithms]] across the set of modelling tools. They cover the inputs used to model the occurrence and rate (amount per model calculation timestep) of the given hydrological process (e.g. infiltration of water into the soil) as well as some general characteristics of the equations, particularly noting if there are thresholds involved and what these are. The tables can be used to understand what is being considered in the calculation of each process and what inputs each modelling tool needs. Not all the processes listed are represented explicitly by all the tools. This is highlighted in the tables below and an overview is also presented in the [[Modelling tool capability overview#Modelling tool capabilities summary|capabilities overview table]]. The nature of the algorithms used and their inputs are linked to the '''spatial and temporal scale''' at which the process is being represented in the given tool, described further for each one [[Model units & connections|here]].
 </br></br>
-'''Thresholds''' refer to limits that may determine when a process would start to occur or would stop occurring.  For example, the field capacity soil moisture of a soil is often used as the threshold soil moisture level for percolation of water downwards, to a lower soil layer or to recharge groundwater. If the model calculated soil moisture is lower than this, no percolation will be calculated.  There may be multiple thresholds considered when modelling a process. For example, evapotranspiration of soil moisture may stop occurring once the atmospheric demand in the timestep has been met and/or once the soil moisture has reached wilting point level, even if demand has not yet been met.
+In these tables '''thresholds''' refer to limits that determine when a process would start to occur or would stop occurring.  For example, the field capacity soil moisture of a soil is often used as the threshold soil moisture level for percolation of water downwards (to a lower soil layer or to recharge groundwater). If soil moisture is lower than this, no percolation will be calculated in the model. There may be multiple thresholds considered when modelling a process. For example, evapotranspiration of soil moisture may be assumed to stop once the atmospheric demand in the timestep has been met or once the soil moisture has reached wilting point level, even if demand has not yet been met.
 </br></br>
 The inputs to a process algorithm can include:

@@ Line 1: / Line 1: @@
 <span id="Process rep - pg top"></span>
-The tables below summarise information about various process representation [[Terminology#algorithm anchor|algorithms]] across the set of tools. They cover the inputs used to model the occurrence and rate (amount per model calculation timestep) of the listed process (e.g. infiltration of water into the soil) and some general characteristics of the equations, particularly if there are thresholds involved and what these are. The tables can be used to understand what is being considered in the calculation of each process and what inputs each modelling tool needs. Not all the processes listed are represented explicitly by all the tools. This is highlighted in the tables below and an overview is also presented in the [[Modelling tool capability overview#Modelling tool capabilities summary|capabilities overview table]].
+The tables below summarise information about various process representation [[Terminology#algorithm anchor|algorithms]] across the set of tools. They cover the inputs used to model the occurrence and rate (amount per model calculation timestep) of the listed process (e.g. infiltration of water into the soil) and some general characteristics of the equations, particularly if there are thresholds involved and what these are. The tables can be used to understand what is being considered in the calculation of each process and what inputs each modelling tool needs. Not all the processes listed are represented explicitly by all the tools. This is highlighted in the tables below and an overview is also presented in the [[Modelling tool capability overview#Modelling tool capabilities summary|capabilities overview table]]. The nature of the algorithms used and their inputs are linked to the '''spatial and temporal scale''' at which the process is being represented in the given tool, described further for each one [[Model units & connections|here]].
 </br></br>
 '''Thresholds''' refer to limits that may determine when a process would start to occur or would stop occurring.  For example, the field capacity soil moisture of a soil is often used as the threshold soil moisture level for percolation of water downwards, to a lower soil layer or to recharge groundwater. If the model calculated soil moisture is lower than this, no percolation will be calculated.  There may be multiple thresholds considered when modelling a process. For example, evapotranspiration of soil moisture may stop occurring once the atmospheric demand in the timestep has been met and/or once the soil moisture has reached wilting point level, even if demand has not yet been met.
@@ Line 10: / Line 10: @@
 Different software tools may refer to equivalent inputs using different words and sometimes they require the user to input different specific property values, but end up calculating the same derived property. For example, on software tool may require porosity of soil to be input, another may require bulk density, and another may as for volumetric soil moisture at saturation, any of these, coupled with soil layer depth, can be used to calculate the maximum (or saturation) soil water storage volume. Where possible, similar terms have been used across tools in the tables below to highlight their conceptual similarities where these exist.  Details about some of the contrasting terminology used in the interfaces of different tools can be found [[Terminology#Hydrological process and parameter terms across tools|here]].
 </br></br>
-The nature of the algorithms used and their inputs are linked to the '''spatial and temporal scale''' at which the process is being represented in the given tool, described further for each one [[Model units & connections|here]].
 == Canopy interception and evaporation (vs throughfall) ==

@@ Line 1: / Line 1: @@
 <span id="Process rep - pg top"></span>
-The tables below summarise information about various process representation [[Terminology#algorithm anchor|algorithms]] across the set of tools. They cover the inputs used to model the occurrence and rate (amount per model calculation timestep) of the listed process (e.g. infiltration of water into the soil) and some general characteristics of the equations, particularly if there are '''thresholds''' involved and what these are.
+The tables below summarise information about various process representation [[Terminology#algorithm anchor|algorithms]] across the set of tools. They cover the inputs used to model the occurrence and rate (amount per model calculation timestep) of the listed process (e.g. infiltration of water into the soil) and some general characteristics of the equations, particularly if there are thresholds involved and what these are. The tables can be used to understand what is being considered in the calculation of each process and what inputs each modelling tool needs. Not all the processes listed are represented explicitly by all the tools. This is highlighted in the tables below and an overview is also presented in the [[Modelling tool capability overview#Modelling tool capabilities summary|capabilities overview table]].
 </br></br>
-Thresholds refer to limits that may determine when a process would start to occur or would stop occurring.  For example, the field capacity soil moisture of a soil is often used as the threshold soil moisture level for percolation of water downwards, to a lower soil layer or to recharge groundwater. If the model calculated soil moisture is lower than this, no percolation will be calculated.  There may be multiple thresholds considered when modelling a process. For example, evapotranspiration of soil moisture may stop occurring once the atmospheric demand in the timestep has been met and/or once the soil moisture has reached wilting point level, even if demand has not yet been met.
+'''Thresholds''' refer to limits that may determine when a process would start to occur or would stop occurring.  For example, the field capacity soil moisture of a soil is often used as the threshold soil moisture level for percolation of water downwards, to a lower soil layer or to recharge groundwater. If the model calculated soil moisture is lower than this, no percolation will be calculated.  There may be multiple thresholds considered when modelling a process. For example, evapotranspiration of soil moisture may stop occurring once the atmospheric demand in the timestep has been met and/or once the soil moisture has reached wilting point level, even if demand has not yet been met.
+</br></br>
+The inputs to a process algorithm can include:
-</br>
+* input data (e.g., rainfall, using the rainfall input for a particular modelled unit, for a given timestep),
 == Canopy interception and evaporation (vs throughfall) ==

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 | style="background: #FFFFF5; vertical-align: top" |
 '''yes:'''
-<br/>Saturation SM
+<br/>Field capacity SM
 | style="background: #F5FCFF; vertical-align: top" |
 '''yes:'''

← Older revision		Revision as of 10:48, 27 November 2023
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−	~~The~~ <span id="Process rep - pg top">~~tables below~~</span>	+	<span id="Process rep - pg top"></span>
		+


−	~~building process representation overview tables + links to more specific pages about individual processes~~
	</br>		</br>

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 <br/>Aquifer max storage
 |}
 [[#Process rep - pg top|Back to top of page]]
 </br>