Guelph is a little different when it comes to analyzing watersheds, as it’s all on a smaller scale. When I moved from Toronto the the Tri-Cities, it was a big eye-opener for me, as these differences had a direct impact on the lay of the metroscapes.
As a recap, Toronto is bounded by a great lake with 6 major rivers and creeks feeding into it. The Tri-Cities are along one major river, and has 6 significant tributaries feeding into it. It’s a downscaling that, combined with way different hydrogeology and urban timelines, really varies the metroscapes.
Guelph is yet another downscale. It is intersected by two major river, the Speed and Eramosa Rivers, which feed into the Grand River (the major river along the Tri-Cities). There are 4 significant tributaries and their watersheds, which cover just over half of the urban area: the Willow, Clythe, Torrance and Hanlon Creeks.
Two small notable creeks are the Speedvale East and Howitt Creeks covering about 4% of the city. Another third is the interstitial drainage feeding into the Speed and Eramosa Rivers, and the remaining 5.6% goes to external watersheds.
This is a work in progress. See a mapping error? Have a name to put to an unnamed tributary? Please feel free to send me comments.