Spatial resolution of SWAT+ input layers

[khalid hassaballah]

Dear all

Does SWAT+ require all input spatial layers, such as DEM, soil, and land use, to be at the same spatial resolution? What is the recommended resolution to smoothly run a model for an 800,000.0 Km2 basin?

  

Thank you in Advance

Khalid

[Chris George]

No. They just need to have the same projection.

You can see some typical times for running watershed delineation for
different numbers of DEM pixels and some different machines in the
QSWAT+ manual, section 14.7. So you can estimate a time for your DEM
and decide if you want to resample it. The only recommendation is to
use the best resolution you have if possible.

Chris

On 6/11/2025 11:33 AM, khalid hassaballah wrote:
> Dear all Does SWAT+ require all input spatial layers, such as DEM, soil,
> and land use, to be at the same spatial resolution? What is the

> recommended resolution to smoothly run a model for an 800,000. 0 Km2

> basin?    Thank you in Advance Khalid

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