topic Calculating average stream length per stream order in Water Resources Questions

Calculating average stream length per stream order

SeanLofgren — Wed, 23 May 2012 19:48:29 GMT

I have the strahler stream order layer and a stream length raster. How can I calculate the average lenth for each stream order? Is this possible? Any help would be greatly appreciated.

Re: Calculating average stream length per stream order

AliAkel — Wed, 23 May 2012 23:44:17 GMT

Here's one way to do it. Though I don't know if it is the "proper" way:

-First convert your stream order layer to a polyline from:
Arc Toolbox > Conversion Tools > From Raster > Raster to Polyline.
Add your stream order layer as an input and uncheck the "simplify polylines" box.

-Next add a new field to the attribute table of your newly created layer:
Arc Toolbox > Data Management Tools > Fields > Add Field
Choose your newly created layer as the input table and enter "length" (or whatever) as the field name. choose "LONG" as the field type.

-Now open the attribute table for the layer created in the first step, right-click on the field you've created and choose "calculate geometry". Choose your units and click OK.

Re: Calculating average stream length per stream order

SeanLofgren — Fri, 25 May 2012 12:18:02 GMT

Thank You. That worked great and was exactly what I was looking for.

Re: Calculating average stream length per stream order

JoshuaOmereonye — Mon, 16 Apr 2018 21:38:05 GMT

Hello Akel, i tried exactly what you said and it didn't work. i wasn't still able to calculate the stream length

Re: Calculating average stream length per stream order

JoshuaOmereonye — Mon, 16 Apr 2018 21:40:16 GMT

Is there any alternative way of solving the problem?