Monday, February 13, 2012

Watershed Lab

This lab was about learning to do the watershed.
I started out with obtaining a DEM from the USGS Seamless Data Distribution Website from this link http://seamless.usgs.gov/.  I picked New York with Niagara Falls. This picture is the "Fill" of the DEM.
Flow Direction 
The Flow Accumulation 
This is the Flow Accumulation with the streams greater than 3,000 using the raster  calculator. 




Flow Length

Added my own point shapefile to go right on top of the streams. This created Pour points for areas of interests.  The colored portion  are the watersheds that go through the pour points.

Behold! I also used model builder.  It shows all the steps I took.