river_routing as model component or part of the land_surface?

[jesusff]

The current Essential Model Documentation (EMD) does not consider river routing (or surface or subsurface hydrology) a separate model component type (see Section 7.1). What do you think? Is the river routing in your coupled models a clearly separated component that needs to be coupled to the rest? or is it embedded in the land surface scheme? Note that even if it is embedded, the EMD allows for component types to be embedded within others (see Section 3.1). Does it typically have its own grid? time step?

As it is not currently in EMD, for the moment, we are coding it as part of the land_surface component:

model-documentation/_models/CNRM-RCSM6B.md

Lines 176 to 202 in cedf590

	river_routing:
	name: ISBA-CTRIP vx.x
	family: TRIP
	description: >
	CTRIP is a river routing model used to convert the daily runoff simulated
	by ISBA into river discharge on the global river channel network at
	1/12-degree resolution.
	references:
	- citation: Decharme et al. (2019)
	doi:
	- citation: Munier and Decharme (2022)
	doi: https://doi.org/10.5194/essd-14-2239-2022
	native_horizontal_grid:
	description:
	grid: regular_latitude_longitude
	grid_mapping: latitude_longitude
	region: limited_area
	temporal_refinement: static
	arrangement: arakawa_a # check
	resolution_x: 1/12
	resolution_y: 1/12
	horizontal_units: degree
	n_cells: 1116x648
	time_step_s: 1800
	floodplains_parameterization: true
	groundwater_scheme: true
	carbon_to_ocean: false