Arc Hydro drainage line not connected

EvanAngus

I'm currently working on a project in which I need to have a complete and connected drainage line. Once reaching the stage of drainage line processing, my output has discontinuities through various drainage lines when in reality they should be connected . Does anyone know how I could address this issue.

 

Thanks 

Evan 

MarkBoucher

I don't know if this is the issue you must fill the sinks. Otherwise the flow direction will result in cells that don't flow downstream and the resulting drainage line layer be as you described.

If you haven't burned in the streams, you may have roads crossing (or other anomalies) in your otherwise good DEM. If these are elevated above the surrounding DEM defined "valleys" the flow direction will stop at the crossings and you will get results as you described.