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Streams not exiting DEM

Question asked by on Feb 6, 2019
Latest reply on Feb 12, 2019 by



I'm quite new to hydrological analyses and Arc Hydro and trying to get my head around dealing with streams (artificial ditches rather) not exiting my DEM. I would like to "burn" these ditches into my DEM using "DEM reconditioning" but what I'm wondering is: will I need to apply some kind of sink structure as my ditches are not exiting the DEM? I believe the issue (i.e. the reason the ditches are not exiting the DEM) is that I am working in a semi-urban area and the ditches may actually be ending up in storm water systems. Could these somehow be considered sinks? 


I apologize if the questions is a stupid one...I'm just really confused and any help would be really appreciated.