Watershed Tool Troubleshooting

Question

Hi Everyone,

I created a set of watersheds using a set of pourpoints raster, which have been snapped to the location of highest accumulation using the snap pourpoint tool and the Watershed tool. When I generated the watershed, one of the watersheds has void spaces within the watershed. I was wondering if anyone have faced this problem before and how you resolved it? I attached a picture of the watershed below.

Watershed_with_voids.JPG

Anonymous User · Answer

Good day

Used the d8 flow direction from a 5m dem to create the watershed, but it calculated only 1 bock or a small area around the stream. A can see the watershed must be a lot bigger with the stream data I have.

Ntlenga_bridge3.jpg

BeverlyPham · Answer

Hi Dan,
I was able to successfully use the fill tool on my original raster, but there was no depression found. Do you know if the fill tool should also work on a directional raster? If there is no depression, do you have other ideas of what may have caused the void spaces in the watershed? I was wondering, is there a tool to fill in void spaces in a polygon?

Thank you so much for your help!

danretired · Answer

I suspect your map and input files and output file were in different coordinate systems, use the Environments tab on tools to make sure you get your coordinate systems correct