2

In my watershed I have around 400 basins. I need to find the max flow length in each basin. The "Flow Length" tool creates the flow length for the entire watershed, not for each individual basin.

Is there a way to clip the flow direction raster by using the basins or is there a better workflow?

I am using ArcGIS Pro and I have a Spatial Analyst license.

0

2 Answers 2

0

An alternative workflow is to turn your stream network into a polyline dataset and your basins into polygons then its a simple Intersect. The Intersection will cut up the network and assign the basin ID. I would then run a summary statistics grouping by basin ID and summing length.

0

You could create a tool in modelbuilder:

Add iterator: Iterate through features in ‘basin’ feature class:

Tool - Extract by mask (Input: DEM / 'basin' selection as feature mask / Output:%Name%_DEM)

Tool - Flow Length (Input: %Name%_DEM / Output: %Name%_FlowLength / 'Upstream')

Tool - Mosaic to New Raster (Input Rasters: all %Name%_DEMs)

Result would be a raster with flow lengths limited to the boundaries of each basin.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.