shrug-l: proportion of watershed upstream of monitoring location

North, Joe Joe.North at
Fri Sep 7 09:11:19 EDT 2007

One option you have is a bit labor intensive and you'd have to determine cost
vs benefit but it involves incorporation of your data into a model
co-developed by Dr. David Maidment (University of Texas, Austin) and ESRI.
Among other things, it would require that you also input a surface terrain
layer (a TIN or raster with elevations developed from a DEM for example) and
a water feature layer representing the streams and rivers you're interested
in (the National Hydrographic Dataset (NHD) would provide an excellent
source).  For more information, see... and
Joe North
Environmental Manager
Geographic Information Systems
Watershed Data Services Section
Bureau of Watershed Management
Florida Department of Environmental Protection
2600 Blair Stone Road, Mail Station 3525
Tallahassee, Florida 32399-2400
phone: (850)245-8537
fax: (850)245-7571

From: shrug-l-bounces at
[mailto:shrug-l-bounces at] On Behalf Of Michael McManus
Sent: Friday, September 07, 2007 8:27 AM
To: shrug-l at
Subject: shrug-l: proportion of watershed upstream of monitoring location
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?
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)
Courtesy Research Associate
Department of Biological Science
Florida State University
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