Gaps in watershed after watershed delineation

[HMort]

Hi,

I've been doing a watershed delineation in ArcGIS Pro 3.1.4 from a 50cm DEM. I've done this according to the following workflow: DEM fill, Flow direction (D8), Flow accumulation (D8), placing outlet points and running the watershed tool. Unfortunately, the watersheds that the tool is outputting leaves a couple of gaps where there is no watershed data (and where there is data in the DEM). I can't link an image, but basically it looks like a group of coloured shapes together, where one chunk is missing and you can see whatever's underneath the layer.

Any ideas why this could be and how to deal with it?

[kathy71jones]

Sorry, I don't. I'm hoping an expert in this area will help us all out.
Kathy

[HMort]

To update this, I basically found that the resolution was too high. This was too computationally expensive for the system I was using to run, causing a lot of noise and the aforementioned gaps.