shrug-l: proportion of watershed upstream of monitoring location

[Michael McManus]

I have a point shape file of monitoring locations on rivers.  I have a shape
file of the watershed polygons in which those monitoring stations are
located.  For a particular monitoring location, how do I calculate the
proportion of the watershed that is upstream from that location?

Thanks,
Mike


Michael McManus
Senior Aquatic Ecologist
The Nature Conservancy
625 N. Adams Street
Tallahassee FL 32301
850.222.0199 (office)
850.559.1530 (cell)
850.222.0973 (fax)

and
Courtesy Research Associate
Department of Biological Science
Florida State University
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