Hello,

I am looking at accumulating values of data along a stream network to determine likely points of stress. I am aware that I can weight flow accumulation but am interested in an accumulated average value for slope much like a flow accumulation grid. In addition I would like to accumulate forest canopy as well. I already have a DEM, canopy and slope grid. I would also like to know if there is a way of capping the accumulation. For example can I limit the accumulation to the upstream nearest 5000 cells?

Question 1) How can I create an "flow" accumulation grid of other grid data?

Question 2) Can I set limits on the number of upstream cells to accumulate?

Thanks!

I am looking at accumulating values of data along a stream network to determine likely points of stress. I am aware that I can weight flow accumulation but am interested in an accumulated average value for slope much like a flow accumulation grid. In addition I would like to accumulate forest canopy as well. I already have a DEM, canopy and slope grid. I would also like to know if there is a way of capping the accumulation. For example can I limit the accumulation to the upstream nearest 5000 cells?

Question 1) How can I create an "flow" accumulation grid of other grid data?

Question 2) Can I set limits on the number of upstream cells to accumulate?

Thanks!

If you want to do the latter, you could use the number of cells variable in the Stream Definition step to "granularize" the number of points/confluence you get along the streams. You could use the stream order function to eliminate minor streams if you don't want points on every little tributary.

If you come up with a way to do this from a point, then you can convert your stream raster to points and geoprocess this for every point on the stream.