# Geometric Network Downstream River Tracing?

I'm using ArcGIS 10.2 Desktop and I need to trace downstream on a river network from a Discharge point to another point where the river intersects polygons of interest. The distance from each discharge point to the nearest point of intersection (with the polygon of interest) is an important element that I need to know.

I am using a geometric network and my question is how do I go about doing this process? I've looked at flags and barriers but distance doesn't seem to be included when looking at geometric networks as opposed to Network Datasets such as roads etc. I'm not sure how to mark the first point of interaction a river has with the area of interest. I've been able to dissolve my geometric layer so that I'm left with just the sections of river concerned with each discharge point.

I need to be able to say that from Discharge Point A, here is a list (say 5km's downstream of it) of all the receptors (my areas of interest which are either lines or polygons) it interacts with.

• Are you asking can a geometric network be used for downstream tracing? If so, then yes... What you have written is more of a statement rather than a question, so not sure what you are asking? Commented Jul 1, 2015 at 16:02
• I'm really sorry for wording the question incorrectly! Yes I am using a geometric network and my question is how do I go about doing this process? I've looked at flags and barriers but distance doesn't seem to be included when looking at geometric networks as opposed to Network Datasets such as roads etc. I'm not sure how to mark the first point of interaction a river has with the area of interest. I've been able to dissolve my geometric layer so that I'm left with just the sections of river concerned with each discharge point. Commented Jul 6, 2015 at 11:03
• I need to be able to say that from Discharge Point A, here is a list (say 5km's downstream of it) of all the receptors (my areas of interest which are either lines or polygons) it interacts with. I'm sorry if my explanation is a bit confusing! Commented Jul 6, 2015 at 11:07
• I think gis SE etiquette is to amend your original question with the extra information you have just given in your comments. This will attract a better response and remove the unclear tag on your question. Commented Jul 6, 2015 at 11:41
• Okay I've edited the original question now too, thanks for letting me know, I appreciate it. Commented Jul 6, 2015 at 12:49