ETP calibration in specific subbasin

[Gerardo Castellanos]

Hi everyone,

I am trying to calibrate ETP for an unique subbasin, I don't know if thats possible. My problem is that I don't know how to define that specific object when I am adding the observations file. For example, the level in this case is "basin"? When I try to define basin level and "basin number=12" the program just crashes.

Another idea that I have is to select "LSU" level, but as you know, normally we have more than one LSU in a subbasin, so my question is... Is possible to define multiple objects?

If anyone has any idea how I can do this, if possible, I would greatly appreciate the help.

[SWAT+ Toolbox]

What are you trying to calibrate?

Why is basin number 12? Do you mean sub-basin? please clarify

[Gerardo Castellanos]

Sorry for the confusion, what I want to calibrate is a specific sub-basin (number 12), I meant that when the “specific object” is to be selected the available options are HRU, LSU or Basin. I understand that “Basin” refers to the whole basin, not to a specific sub-basin, so if I indicate Basin = 12 (this is not supposed to be correct because we only have 1 basin) the program closes.

[Celray James]

Easiest way to do it is to know which LSUs are in the sub-basin you want from QSWAT+ and select those on the map within SWAT+ Toolbox. SWAT+ Toolbox will find the HRUs for those LSUs. What parameters do you want to add? some parameters cannot be added to Sub-Basin/LSU/HRU objects for example ch_k...

[Saeed Golian]

Good question,

In other words, besides available options, there should be a way to select sub-basins and then the model automatically select all HRUs and aquifer units within that specific sub-basin and calibrate their parameters within that selected sub-basin. 

Regards

Saeed

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[Celray James]

This is a good idea. I can add this feature in version 2.5 or 2.6, but it will only work if you have the full QSWAT+ Project (not just TxtInOut). Also, there will be a limitation with deep aquifers.

Thanks Saeed.

[Gerardo Castellanos]

So, at the moment of including my ETP observations file, is it possible to assign it to several LSUs at the same time? That is the doubt that arises in my mind. To assign the parameters to specific objects I have it clear, since I can select the objects through the SWAT+Toolbox map. My idea is to use parameters related to evapotranspiration, I think there would be no problem with that.

Thanks for the quick feedback.

[Andreé Hidalgo Ravelo]

I think that's not a good idea, because ETP of your subbasin is the sum of all containing LSU, so your observation data is the result of aggregate all the ETP of LSU inside the subbasin. 

You probably should create a single swat+ model only if this subbasin, and so could be possible to use your observation data to calibrate it. 

Regards. 

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[Andreé Hidalgo Ravelo]

Hello Celray,

When could we expect this release version?

I've tried to type multiple HRUs from a single line, but no separation character (- _ : ,) works. 

My project has thousands of HRUs, it would be complicated and inaccurate to select my study sub-basin using the manual mapping selection tool.

The other options are by range (I would have to enter range by range each time), and by single unit, that's where I'm focusing.

My idea is to enter just one line that contains all my study hrus at once. Something like this:

23_65_134_.... etc etc

But I think that's no any special character that allows that.

Thank you for your support. 

Regards. 

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[Celray James]

Hi.

Right now, there is a pre-release version where I can add separators if you want this feature where you enter comma separated values and it adds all objects listed. I have been contemplating on the sub-basin idea, but SWAT+ does not really work with subbasins (except for demarcating shallow aquifers - as far as i know). Thus for map, it would make sense to stick with LSU selection.

Let me know so I can add it and send you the pre-release for testing. I will need feedback.

Thanks!

[Saeed Golian]

Hi Celray,

Thanks for your response. Maybe not completely related to this post, but can I ask when any version of SWAT+Toolbox compatible with gwflow will be released? Any plan to do so in near future?

Thanks in advance,

Kind regards 

Saeed

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[Celray James]

SWAT+ Toolbox is already compatible with gwflow. It knows if your project is using gwflow and treats it as such. the only issue is that the executable is not handling the parameters well based on my tests as I did not find the gwflow parameters to be sensitive. Hopefully this is addressed in the next executable.