Redrawing rivers in proportion to their discharge?

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01-18-2013 04:58 PM
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ElizabethWalsh
New Contributor
Hello,

If there is another part of the forum where this would be more appropriate, please let me know.

Using the hydrology toolset and a digital elevation map, I was able to draw the stream network of my thesis area.  I have it drawn as a raster, and as a polyline shapefile which I created from the raster.

In the field, I performed direct measurements of river discharge.  I would like to re-draw my stream network so that the width of each stream is proportional to the volume of water flowing through it.

I don't even know where to begin with this, so any suggestions would be appreciated.

Thank you!
Elizabeth
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MarkBoucher
Regular Contributor II
Here's a good article:
http://blogs.esri.com/esri/arcgis/2008/05/03/u-s-hydro-flow-lines/

Also related this tool in Spatial Analyst:  Spatial Analyst Tools.tbx\Hydrology\Stream Order
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z00000057000000.htm

Use the tool to create the stream order and then use Quantities/proportional symbology.

Good Luck!

PS - This results in a raster. You then have to convert the stream raster to a feature to get the polylines that have a grid code based on the stream order. Use proportional symbology based on the grid code.
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