Hydrotools: Blanking irrelevant data out

Discussion created by pklipper on May 8, 2013
Latest reply on May 9, 2013 by MBoucher21
I have a Question. Right now I am using DGM Data and the Hydro Tool is working fine.
The Situation is:
I used the flow-direction tool. The result is absolutely fine. But now i need to relate the results to (for example) a lake. Can i somehow filter out only the relevant flow-directions that go towards the lake? All the other directions are not relevant, so i want to blank them out.
Thanks in advance