Error running the model

[Arantxa Ortiz]

Dear Swat users,

I am having trouble when I try to run my model. I insert every weather data but then when I run the model I get the error of the image. What can I do?

Thank you

arantxa

[Maarten J. Waterloo]

Hi Arantxa,

The error most likely indicates that you have a zero CN value somewhere in the HRUs. The curve number CN is used to estimate runoff and depends on the hydrologic condition of the soil (I to IV, or A to D, with D being poorly drained soil). CN2 is the number for hydrologic condition II in SWAT+. The potential maximum soil moisture retention after runoff starts is calculated from the CN value where

If CN is zero, this would give a floating divide by zero error when calculating S. Please check your HRU files (in the sqlite database) for values of zero...

Regards,

Maarten Waterloo

Acacia Water

[Arantxa Ortiz]

Hi Maarten,

Thank you for the advice, I had considered the water parts and urban parts in the usersoil table, but since this two do not have the propeties of the soils, I had every value as 0. So when I removed this two this error was not here anymore. Nevertheless, now my concern is, how does SWAT+ consider the urban and water parts, from the landuse map?

Thank you

Arantxa