calibration with flow out

[Rym Hadded]

Dear all, 

I am using the variable flowout to calibrate the swat model. the observed streamflow  (m3/s) is at the level of the outlet (subasin 1).

In the rch. output the results are given by subasin .

so should I divide  Surface runoff unit (m3/s)   by the total watershed area and then multiply by the subasin1 area ?

the observed outflow looks higher than the simulated.

I tried to use the Baseflow Program  developed by Arnold et al. (1995a) and modified by Arnold and Allen (1999) but no result.

please if there is a document how to do calibration with discharge step by step please give me.

thanks

[Diwakar Saran]

The flow out given in  .rch should be directly compared with your observed data to check the modelling efficiency of the uncalibrated model.

To do this, kindly plot FlowOut and Corresponding observed discharge for each date according to availability.

Notice how many peaks are matching. Are the FlowOut and Observed Discharge following a trend? Also find out NSE of this uncalibrated model. If these results are encouraging, then the model can calibrated via SWAT-CUP.

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[Muhammad Ishaq.]

You should simply calibrate your model with observed streamflow (m/s3) and select the exact column where you have the streamflow (flow out ) values in the SWAT base model access file that have the same unit (m/s3). Rest everything should be fine.

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[Rym Hadded]

Dear Diwakar Saran,

Thank you so much for repling.  

I think the problem is in the observed data.

I have as observed data the height of water (mm) given from limnigraph records in the outlet in Subasin1 and the duration of the runoff so we can calculate the speed (3/s). (duration because the study area is in an arid region and we have intermittent streams) .

 

So to convert the records  to flow  (m3/s) sould I multiply the speed (m/s) x :

- the transverse area of the reach 1  (width x height of water )

- the area of reach1 (legth/width)

- the area of all reach of watreshed

???

Please help.

To view this discussion on the web visit https://groups.google.com/d/msgid/swat-cup/CA%2B4wxg8L74rEyz6PtUUGvpsvz_CHqujgCMaPJPC_UpeqqsSiCw%40mail.gmail.com.

[Rym Hadded]

  Dear Muhammad Ishaq,

Thank you so much for replying.  

I think the problem is in the observed data.

I have as observed data the height of water (mm) given from limnigraph records in the outlet in Subasin1 and the duration of the runoff so we can calculate the speed (3/s). (duration because the study area is in an arid region and we have intermittent streams) .

 

So to convert the records  to flow  (m3/s) sould I multiply the speed (m/s) x :

- the transverse area of the reach 1  (width x height of water )

- the area of reach1 (legth/width)

- the area of all reach of watreshed

???

Please help.

To view this discussion on the web visit https://groups.google.com/d/msgid/swat-cup/CAGmCkit8vNdPctOCmK1DNYy%3Ddq-9XLv8zs2j8QYDFG4A2zTzSA%40mail.gmail.com.

[PIERRE MALANG SADIO]

Hello everyone,

I am looking for specific data on West Africa, including:

• Digital Elevation Model (DEM, MNT) with a resolution of 10 to 12.5 meters,
• Land use data,
• Soil type data,
• Slope data.

If you have access to these datasets or know reliable links where I can download them, I would greatly appreciate it if you could share them with me.

Thank you in advance for your help!

Doctorant au Laboratoire d'Océanographie, des Sciences de l'Environnement et du Climat (LOSEC), Physique, Université Assane SECK de Ziguinchor BP 523 Ziguinchor - Sénégal Email: p.sad...@zig.univ.sn            pierre...@gmail.com Tel : +221777045899         +221770851917

To view this discussion on the web visit https://groups.google.com/d/msgid/swat-cup/CAJWSH2gEWgFXr_hOO7TitVowyP%3Dif%2BJv2F2wRQpq2E9f9oxGCA%40mail.gmail.com.

[Тони Старк]

Hi, how did you manage to calibrate the flow, please help me?

среда, 11 сентября 2024 г. в 19:48:06 UTC+8, Rym Hadded: