Model units & connections - Revision history

Julia Glenday at 14:37, 1 December 2023

2023-12-01T14:37:02Z

2023-11-27T13:07:08Z

Irrigated areas: units, water source options

2023-11-27T13:06:54Z

Wetlands: units, location, surface & subsurface flow connections

2023-11-27T13:06:42Z

Water bodies (dams, reservoirs, lakes): unit types, inflow & outflow connections

2023-11-27T13:06:29Z

River channels: units & layout, connections with surface & subsurface land units

2023-11-27T13:06:10Z

Aquifers: spatial distribution, vertical layers, connections

2023-11-27T13:05:54Z

Soils & unsaturated zone (UZ) material: spatial distribution, vertical layers, connections

2023-11-27T13:05:41Z

Land cover: spatial distribution & type limitations

2023-11-27T13:05:17Z

Summary of structural differences & implications

2023-11-27T13:03:47Z

Timesteps & spatial units for different processes

@@ Line 15: / Line 15: @@
 '''''The material on this page may be more depth than you are looking for. If all you need at the moment is an overview of the structures and capabilities of the different modelling tools, that summary can be found on the [[Modelling tool capability overview#Model structure & capabilities overview across tools|capabilities overview page, here]]'''''
 <br/>
 <br/>

← Older revision		Revision as of 13:07, 27 November 2023
Line 1,610:		Line 1,610:
	<small>Can add tile drains: drain to point in river, changes rate</small>		<small>Can add tile drains: drain to point in river, changes rate</small>
	\|}		\|}
		+	[[#Units - pg top\|Back to top of page]]

@@ Line 1,493: / Line 1,493: @@
 | style="background: #F5F8FF; vertical-align: center; text-align:center;" |Can percolate & recharge aquifer layers
 |}
 <br/>
 <br/>

@@ Line 1,408: / Line 1,408: @@
 *<small>Overflow to a downstream branch</small>
 |}
 <br/>
 <br/>
 === Wetlands: units, location, surface & subsurface flow connections ===
 'Wetlands' are challenging to generalise about because a diverse range of hydro-geomorphic settings can give rise to a frequently saturated area. The modelling tools take different approaches to representing wetlands, as described in more detail on a dedicated [[Wetlands|wetlands page, here]].  The table below is a brief overview of the connectivity of specific wetland modules or units in the tools. For some wetland types, other approaches besides the specifically named 'wetland' modules may actually be more relevant (e.g. riparian zone representation in various tools, 'riparian HRU' in ACRU4, 'depression/pothole' in SWAT2012)

@@ Line 1,254: / Line 1,254: @@
 | style="background: #F5F8FF; vertical-align: center; text-align:center;" |'''Flexible'''
 |}
 <br/>
 <br/>

@@ Line 1,077: / Line 1,077: @@
 Removed from model
 |}
 <br/>
 <br/>

@@ Line 928: / Line 928: @@
 | style="background: #F5F8FF; vertical-align: top" |
 |}
 <br/>
 <br/>

@@ Line 792: / Line 792: @@
 |}
 <br/>
 <br/>

@@ Line 683: / Line 683: @@
 |}
+[[#Units - pg top|Back to top of page]]
@@ Line 702: / Line 702: @@
 In terms the basic model subcatchment, there is also a potentially important difference in the connection to the channel network between the tools. This is relevant to their representation of groundwater-surface water interactions. Both tools calculate aquifer-river channel exchange for the basic subcatchment unit. This is calculated within a 'runoff module' in WRSM, before the water is routed to a connected channel module. Channel modules receive the net runoff after this exchange, and do not interact further with the runoff module/subcatchment. In a sense, there is an implicit 'tributary channel' within a WRSM runoff module for which certain processes are represented, and the channel modules are a main channel network that is handled differently. In SPATSIM-Pitman, each subcatchment has a channel element that is tied to it. The channels of downstream subcatchments receive channel flow from those upstream and their channel-aquifer exchange is calculated using this accumulated channel flow. In WRSM-Pitman, this exchange is only calculated for the runoff produced in the run-off module, the incremental subcatchment, and channel flow from upstream subcatchments is not involved. The overall impact of this different on catchment-scale modelling outcomes would vary depending on how important this exchange for a given area.
 <br/>
 <br/>

@@ Line 373: / Line 373: @@
 | style="background: #F5F8FF; vertical-align: top" |Grid cells
 |}
 <br/>
 <br/>