Problem with Decision Tables for LULCC in SWAT+ v2.0.4

[Rodrigo Marinao Rivas]

Dear all

I am using SWAT+ v2.0.4 (QSWAT+ 2.0.6, rev60.5.2_64rel.exe) to study land use changes in a basin considering variable land uses over time, but my implementation of decision tables is not working as expected.

The following figure [Figure "1_land_uses_distribution.jpg"] shows distribution of land uses of a minimal exercise I am working on, where "fomi" is native forest, “shrn” is shrubland, “tubg” is tundra, and “wetw” is wetlands.

To verify that SWAT + could effectively simulate land use changes, I prepared a escenario (not necessarily realistic) where all the native forest (fomi_lum) abruptly became tundra (tubg_lum) in 2008 and continued to be so until 2018. The full model runs from 1979 to 2020.

Then, I added my decision table [Figure "2_decision_table.jpg], where I understand that the changes should be made to all HRUs that meet the previous condition.

According to the description of the decision table everything seems to be as required [ Figure " 3_descriptive.png"].

However, after running the model, I did not detect any change in the water balance, compared to a scenario without the change in land use. The outputs of the two scenarios remain exactly the same.

I have tried other similar exercises and the same thing happens.

Am I building the decision table in the wrong way? 

I would appreciate your help so that I can clarify this matter for me.

Best regards,

Rodrigo

[Oscar M. Baez Villanueva]

Dear Rodrigo and all,

I have the same problem when I try to model land-use changes with SWAT+ (the outputs remain the same with and without my scenario of land use)  :(

Here is a simplified conceptualisation of my problem:

my landuse.lum file looks like this:

name          cal_group       plnt_com        mgt     cn2               cons_prac      urban    urb_ro            ov_mann         tile        sep         vfs        grww      bmp  

LU_A                      null        A_comm        null    cn_1     up_down_slope          null         null    convtill_nores        null        null        null           null        null  

LU_B                      null        B_comm        null     cn_2     up_down_slope         null         null        densegrass        null        null        null           null        null  

and my decision table (scen_lu.dtl) like this:

name                     conds      alts      acts  

LU_scenario                  2          1            1  

var                        obj   obj_num           lim_var            lim_op          lim_const           alt1  

year_cal              null                 0                 null                      -        1980.00000              >  

land_use              hru                0               LU_A                     -               0.00000              =  

act_typ                 obj   obj_num               name            option               const         const2                fp              outcome           

lu_change            hru                0                LU_B                 null           0.00000       0.00000           LU_B              y   

Does anybody have an idea why this could be happening or if there is an error/missing step?

Thanks a lot!

Oscar Baez-Villanueva

[Jullian Sone]

Dear Rodrigo and Oscar,

I'm having exactly the same problem... Did you already solve this problem? Please let me know.

Thanks, Jullian.

[truong tunghoa.]

Hi all, how to solve the issue? Thanks

Vào lúc 21:24:54 UTC+7 ngày Thứ Năm, 17 tháng 2, 2022, julli...@gmail.com đã viết:

[yinan ning]

Dear all,

If you find any solution for this problem?

I also set several scenario land use for my model, but the result after using these scenarios is same as before. Or do I need to choose this kind of scenario in somewhere to make it activate?

Any suggestions are will be appreciate.

Thanks very much!

Best regards,

Yinan

[Fereshteh Kordrostami]

Hello everybody,

It would be appreciated if you could share your solutions to this problem.

Thanks,

Fereshteh

[Natalja C.]

Hello,

It seems that SWAT+Editor does not write the .upd file. Please check if there are any .upd files in your model TxTinOut. 

If not - then report the issue to the SWAT+Editor user group.

Best,

Natalja

[Mauricio Zambrano-Bigiarini]

Dear Natalja,

Just a follow up to this question: can you find out whether this missing .upd file has been fixed in the new SWAT+ Editor 3.0 or not?

Thanks in advance,

Mauricio

Mauricio Zambrano-Bigiarini, PhD Associate Professor, Universidad de La Frontera Associate Researcher, Centro FONDAP(CR)2 Teléfono: +56 45 259 2812 e-mail   : mauricio...@ufrontera.cl

===============================================

"Don't wish for less problems, wish for more skills.

Don't wish it were easier, wish you were better"

 (Jim Rohn)

===============================================

Linux user #454569 -- Linux Mint user

===============================================

"Don't wish for less problems, wish for more skills.

Don't wish it were easier, wish you were better"

 (Jim Rohn)

===============================================

Linux user #454569 -- Linux Mint user

--
You received this message because you are subscribed to the Google Groups "SWAT+" group.
To unsubscribe from this group and stop receiving emails from it, send an email to swatplus+u...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/swatplus/e9cd615b-ec1d-42a3-9d12-da60e5c6be74n%40googlegroups.com.

La información contenida en este correo electrónico y cualquier anexo o respuesta relacionada puede contener datos e información confidencial y no puede ser usada o difundida por personas distintas a su(s) destinatario(s). Si usted no es el destinatario de esta comunicación, le informamos que cualquier divulgación, distribución o copia de esta información constituye un delito conforme a la ley chilena. Si lo ha recibido por error, por favor borre el mensaje y todos sus anexos y notifique al remitente.

Las opiniones vertidas en este correo, no contenidas en un documento oficial de la Universidad, son responsabilidad de quien las emite o de quien solicitó su envío, en el ejercicio de su libertad de opinión y de expresión que, como miembro de la comunidad universitaria se le reconoce, y no representan, necesariamente, el pensamiento de la Universidad de La Frontera y de sus directivos.

[liu jing]

Greetings, I have been stuck on this issue for quite some time. My txtinout directory does not contain any upd files. I am using SWAT+ Editor version 3.0.8. Could you please advise on how to proceed to implement land use changes? (Is there a successfully run txtinout file available for reference?) It seems that merely altering the scen_lu.dtl file does not affect the water output. Your assistance would be greatly appreciated!

[Natalja C.]

Hello,

The attached updated file needs to be present in your txtinout files. The decision table name is using the table named:  ‘lu_change_hru_fr’.  

Update the files as needed for your specific case!

Best,

Natalja