I'd like to delineate the catchments upstream of the sampling points.
In order to do that, I have done the following:
- Burn the rivers into the DEM using ArcHydro>DEM Manipulation>DEM reconditioning;
- Flow direction;
- Flow accumulation;
- Snap pour points (my sampling sites); and
- Watershed (Spatial Analyst>Hydrology)
However, the catchments I have got, don't match the reality.
Could you please check the data through this link?