topic Tracing Hydro. How to select furthest downstream Point (barrier) on a Network in Water Resources Questions https://community.esri.com/t5/water-resources-questions/tracing-hydro-how-to-select-furthest-downstream/m-p/525326#M2716 <HTML><HEAD></HEAD><BODY><SPAN>I am new to Geometric networks and am hoping there is an easy solution to this. </SPAN><BR /><BR /><SPAN>I have a geometric network, consisting of 1 poly line feature class, and 1 point feature class. The points in this case are barriers to flow. There can be any number of barrier points on a single poly line. I am in need of a way to select the furthest downstream barrier or point (I can make them junctions if need be) on any given stream line. </SPAN><BR /><BR /><SPAN>Or in the opposite direction, it can work if I trace up stream from the start of the poly line and have the trace end add a barrier. The only issue is, I do not have "Starting" flags at the start of each line. There are far to many lines to manually add junction flag. Right now I do have it setup some my barrier points are DIsabled, so flow will not continue through them if I can figure out a way to trace from the start of the poly lines.</SPAN><BR /><BR /><SPAN>Hopefully this makes sense...</SPAN></BODY></HTML> Mon, 01 Apr 2013 19:06:44 GMT ChristopherClark1 2013-04-01T19:06:44Z Tracing Hydro. How to select furthest downstream Point (barrier) on a Network https://community.esri.com/t5/water-resources-questions/tracing-hydro-how-to-select-furthest-downstream/m-p/525326#M2716 <HTML><HEAD></HEAD><BODY><SPAN>I am new to Geometric networks and am hoping there is an easy solution to this. </SPAN><BR /><BR /><SPAN>I have a geometric network, consisting of 1 poly line feature class, and 1 point feature class. The points in this case are barriers to flow. There can be any number of barrier points on a single poly line. I am in need of a way to select the furthest downstream barrier or point (I can make them junctions if need be) on any given stream line. </SPAN><BR /><BR /><SPAN>Or in the opposite direction, it can work if I trace up stream from the start of the poly line and have the trace end add a barrier. The only issue is, I do not have "Starting" flags at the start of each line. There are far to many lines to manually add junction flag. Right now I do have it setup some my barrier points are DIsabled, so flow will not continue through them if I can figure out a way to trace from the start of the poly lines.</SPAN><BR /><BR /><SPAN>Hopefully this makes sense...</SPAN></BODY></HTML> Mon, 01 Apr 2013 19:06:44 GMT https://community.esri.com/t5/water-resources-questions/tracing-hydro-how-to-select-furthest-downstream/m-p/525326#M2716 ChristopherClark1 2013-04-01T19:06:44Z Re: Tracing Hydro. How to select furthest downstream Point (barrier) on a Network https://community.esri.com/t5/water-resources-questions/tracing-hydro-how-to-select-furthest-downstream/m-p/525327#M2717 <HTML><HEAD></HEAD><BODY><SPAN>You could use the Arc Hydro Tools to calculate the distance to the downstream outlet(s) for each junction in your network. In a dendritic network this allows identifying the most downstream junction(s).</SPAN><BR /><BR /><SPAN>You can check the Arc Hydro forum for instructions on downloading Arc Hydro. Then check the Attributes Tools &gt; Calculate Length Downstream for Junctions tool in the Arc Hydro Tools toolbar/toolbox.</SPAN><BR /><BR /><SPAN>Christine Dartiguenave</SPAN><BR /><SPAN>Esri Water Resources Team</SPAN></BODY></HTML> Tue, 14 May 2013 16:03:24 GMT https://community.esri.com/t5/water-resources-questions/tracing-hydro-how-to-select-furthest-downstream/m-p/525327#M2717 ChristineDartiguenave 2013-05-14T16:03:24Z