topic Flow direction in ArcGIS Spatial Analyst Questions

Flow direction

FlorenceOwusuaa — Tue, 27 Oct 2015 20:56:38 GMT

Folks, is there any ArcGIS tool that can be used to optimally detect and show the possible fertilizer leach flow direction from a warehouse with only DEM/DTM and the point of the warehouse? We are really arguing here: Can some one help to keep the record straight?

Re: Flow direction

ChrisDonohue__GISP — Tue, 27 Oct 2015 20:59:42 GMT

The Spatial Analyst Extension has a hydrology toolset that could be used for what you have in mind.

ArcGIS Help 10.1

If I remember correctly there also is a tool that allows you to place a point and it will then directly show the flow path.

However, big assumption here, I assume you are talking about surface runoff, not groundwater flow.

Chris Donohue, GISP

Re: Flow direction

ChrisDonohue__GISP — Tue, 27 Oct 2015 21:11:08 GMT

There also is an older post that seems to address what you are looking for by using the ArcHydro extension:

Water drop trace?

Edit - another discussion, this one mentioning:

3D Analyst methods (Steepest Path Tool)

The former Spatial Analyst Shortest Path tool which has been replaced by Cost Path

Modelbuilder suggestion to accomplish this

ArcHydro Flow Path Tracing tool

Shortest path tool/ Raindrop trace equivalent in Arc 10?

Chris Donohue, GISP

Re: Flow direction

DanPatterson_Retired — Tue, 27 Oct 2015 21:23:36 GMT

There is indeed a Flow Direction—Help | ArcGIS for Desktop tool, but read the help very carefully, you have to fill sinks first ( Sink—Help | ArcGIS for Desktop ) and some other considerations dealing with the dem. These are covered in this link Understanding drainage systems—Help | ArcGIS for Desktop amongst others.