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MESH-Model / MESH-Dev

This repository contains the official MESH development code, which is the basis for the 'tags' listed under the MESH-Releases repository. The same tags are listed under this repository. Legacy branches and utilities have also been ported from the former SVN (Subversion) repository. Future developments must create 'forks' from this repository.
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Clarification with `Qo` and `Qi` output variables #42

Closed kasra-keshavarz closed 6 months ago

kasra-keshavarz commented 9 months ago

This question has been asked on Slack by @roalva82:

I just wanted to double check something. Is QO the variable that corresponds to the routed discharge? I guess this would take values from ROF and route them through the channel network. Is this correct?

And, @mee067 answered:

Qo is routed discharge at the grid level. it is based on ROF but it is already routed till the grid in question through the channels leading to that grid. Even local runoff in that grid is routed through an assumed channel. Qo is the streamflow leaving that grid to the next one. If you have a gauge at a specific grid, that's is the simulated streamflow that gets written to the streamflow file.

The explanation for the Qo and Qi needs a bit more clarity on the documentations.

Thought it would be good to permanently save the question/answer her for future users (if they happen to ask the same question).

mee067 commented 9 months ago

Thanks for the documentation, Kasra.

To further clarify Qi, it is the routed streamflow from upstream grids/subs (you may have more than one) as it enters the channel before it gets routed through assumed within-grid/sub stream. I am not sure whether local grid/sub flow/runoff is included or not?

Qi look very similar to Qo when plotted spatially.

dprincz commented 6 months ago
These are documented in the Variable List: Token Description Units Minimum release Notes
RFF Total runoff (from all surface, subsurface, and groundwater components). mm 1398  
ROF Total runoff (from all surface and subsurface components). kg m-2 1398  
QI Flow rate entering the channel. m3 s-1 1403  
QO Flow rate leaving the channel (discharge). m3 s-1 1403  
STGCH Channel storage. m3 1403  
ZLVL Stage level. m 1403  
mee067 commented 6 months ago

this is still confusing - what is the difference between ROF and RFF? Kg/m2 is equivalent to mm - the table above means baseflow is not included in ROF but I do not think so.

How does ZLVL get calculated?