I have a network of streams that I need to buffer based on a basic rule set. This buffer will depend on the slope.
The slope is determined by the looking at the difference in elevation between a given point on the river and a point 100 feet away on a line perpendicular to the river at that point, in either direction.
- If the slope is greater than 40% (as determined above) than the buffer shall be 200'
- If the slope is less than or equal to 40% (as determined above) than the buffer shall be 100'
I have 2 slope layers. One is a 30-meter raster and the other is a 0.5-meter raster.
Using ArcGIS Pro, I was able to create perpendicular transects of 200' so that they are 100' on each side of the river. I also was able to create points at the intersection, midpoint and the end of each line. Now I can sample the underlying elevation, calculate the slope and then bring the lines back in and attribute them with the slope. I don't know how I would proceed from here.
Is this the best method to obtain this variable buffer? If it is a good method, how might I go about creating a buffered polygon after determining the set of points that define my buffer distance?