Why when I insert the terrain model only a small part of it appears? And when I do streams delineation after sink processing the main river and reaches do not appear even after performing terrain reconditioning?
It is possible that the selected area for terrain modeling is only a small part of the whole area. Try selecting a larger area for terrain modeling. Regarding the issue with the main river and reaches not appearing, ensure that the correct settings are used for processing sinks and stream delineation. It is also recommended to check if the terrain data is accurate and complete.
