Low calibration results

[lolal...@gmail.com]

Hello everyone,

Hope you are doing well. I am new to SWAT and calibrated the model using 2002-2015 runoff data. but my accuracy is not coming great. How to improve the results?

[balcha yonas]

Hello,

Be Careful of the parametrization. i.e when you use r, v, and a. e.g I have seen that CN2 you used r (relative change) but you used actual CN values instead of the values between o and 1. Please check others and set appropriate values also by observing their default and recommended values.

regards,

Yonas

On Wed, Jun 18, 2025 at 12:14 PM lolal...@gmail.com <lolal...@gmail.com> wrote:

Hello everyone,

Hope you are doing well. I am new to SWAT and calibrated the model using 2002-2015 runoff data. but my accuracy is not coming great. How to improve the results?

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[lolal...@gmail.com]

Hello

Thanks for the replay... I changed CN2 value...but still there is no improvement

[balcha yonas]

Hello,

How many Iterations did you perform? Another thing that I forgot to tell you is when its relative (r) the values could also be to the negative side (meaning -0.99 to 0.99). And please see this literature (https://www.sciencedirect.com/science/article/pii/S0022169415001985) it will help greatly .

From this literature your case might be mitigating those low peak flow values ( increase CN, decrease SOL_AWC, and decrease ESCO).

regards,

Yonas

On Wed, Jun 18, 2025 at 1:34 PM lolal...@gmail.com <lolal...@gmail.com> wrote:

Hello

Thanks for the replay... I changed CN2 value...but still there is no improvement

On Wednesday, June 18, 2025 at 3:23:25 PM UTC+5:30 balcha yonas wrote:

Hello,

Be Careful of the parametrization. i.e when you use r, v, and a. e.g I have seen that CN2 you used r (relative change) but you used actual CN values instead of the values between o and 1. Please check others and set appropriate values also by observing their default and recommended values.

regards,

Yonas

On Wed, Jun 18, 2025 at 12:14 PM lolal...@gmail.com <lolal...@gmail.com> wrote:

Hello everyone,

Hope you are doing well. I am new to SWAT and calibrated the model using 2002-2015 runoff data. but my accuracy is not coming great. How to improve the results?

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You received this message because you are subscribed to the Google Groups "SWAT-CUP" group.
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To view this discussion visit https://groups.google.com/d/msgid/swat-cup/a0b0c2b5-7efe-4e1f-a3d4-e1e79a3fa231n%40googlegroups.com.

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[Erick Garcia]

Hi. Your CN range are not correct (take a look at Swatcup manual) and check your rainfall input  in the peak events

El mié., 18 de junio de 2025 4:14 a. m., lolal...@gmail.com <lolal...@gmail.com> escribió:

Hello everyone,

Hope you are doing well. I am new to SWAT and calibrated the model using 2002-2015 runoff data. but my accuracy is not coming great. How to improve the results?

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