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"Removing" lakes from DEM

Question asked by xela3185@gmail.com on Feb 11, 2019
Latest reply on Feb 19, 2019 by xela3185@gmail.com

Hello,

 

I need to recondition my DEM by burning in streams. Some of these don't "exit" the DEM but instead end up in lakes. As far as I understand it these lakes should by treated as sinks and essentially a sink structure should be created for them (for the streams to “exit” the DEM so they won’t get filled in during the “fill sinks” operation). However, I have read that an alternative approach is to “remove” the areas of the original DEM corresponding to "sink lakes". This way we ensure that all streams will be burnt in and not re-filled as they will “exit” the DEM. I found this procedure easier and was wondering if it can be considered a valid approach.

 

Thanks for the help.

 

Alex

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