topic Re: Hydrotools: Blanking irrelevant data out in Water Resources Questions https://community.esri.com/t5/water-resources-questions/hydrotools-blanking-irrelevant-data-out/m-p/736961#M3780 <HTML><HEAD></HEAD><BODY><SPAN>Upload an image of what you are trying to achieve.</SPAN></BODY></HTML> Wed, 08 May 2013 12:28:13 GMT DuncanHornby 2013-05-08T12:28:13Z Hydrotools: Blanking irrelevant data out https://community.esri.com/t5/water-resources-questions/hydrotools-blanking-irrelevant-data-out/m-p/736960#M3779 <HTML><HEAD></HEAD><BODY><SPAN>Hello</SPAN><BR /><SPAN>I have a Question. Right now I am using DGM Data and the Hydro Tool is working fine.</SPAN><BR /><SPAN>The Situation is:</SPAN><BR /><SPAN>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.</SPAN><BR /><SPAN>Thanks in advance</SPAN></BODY></HTML> Wed, 08 May 2013 08:48:46 GMT https://community.esri.com/t5/water-resources-questions/hydrotools-blanking-irrelevant-data-out/m-p/736960#M3779 PhilippKlippert 2013-05-08T08:48:46Z Re: Hydrotools: Blanking irrelevant data out https://community.esri.com/t5/water-resources-questions/hydrotools-blanking-irrelevant-data-out/m-p/736961#M3780 <HTML><HEAD></HEAD><BODY><SPAN>Upload an image of what you are trying to achieve.</SPAN></BODY></HTML> Wed, 08 May 2013 12:28:13 GMT https://community.esri.com/t5/water-resources-questions/hydrotools-blanking-irrelevant-data-out/m-p/736961#M3780 DuncanHornby 2013-05-08T12:28:13Z Re: Hydrotools: Blanking irrelevant data out https://community.esri.com/t5/water-resources-questions/hydrotools-blanking-irrelevant-data-out/m-p/736962#M3781 <HTML><HEAD></HEAD><BODY><BLOCKQUOTE class="jive-quote">Can i somehow filter out only the relevant flow-directions that go towards the lake?</BLOCKQUOTE><SPAN>If you have the fdr grid, you should be able to deliniate all areas that flow to the lake by creating a watershed from the lake outlet. This would give you a polygon. Then you can use a polygon of the lake to mask out the lake and result in the areas that flow to it.</SPAN></BODY></HTML> Thu, 09 May 2013 16:21:39 GMT https://community.esri.com/t5/water-resources-questions/hydrotools-blanking-irrelevant-data-out/m-p/736962#M3781 MarkBoucher 2013-05-09T16:21:39Z