Hi, I have a few questions about using the hydrology toolset in ArcGIS.
- After creating the Flow Direction model, I identified the sinks and found that there were some reservoirs which were not included as sinks. I assume that this is because the DEM did not capture the elevation profile for these areas properly. I have a polygon layer of the reservoirs, but unfortunately with no depth profile. Will this help?
- When I eye-balled through the sinks, I realised that a lot of them has the value of "No Data". How do I fill up these sinks for such instances to separate them from the true positives?