Modeling Phosphorus Loading in Agricultural Watersheds Across Southern Ontario

Session: 42. - Multi-Watershed Nutrient Study: Establishing a Monitoring Network in Agricultural Regions

Christopher Wellen, Ryerson University, christopher.wellen@ryerson.ca
Jung Lee, Ryerson University, leej45@ryerson.ca
Sanjay Rasiah, Ryerson University, sanjayrasiah@gmail.com
Alexander Pardy, Ryerson University, alexander.pardy@ryerson.ca
Mohamed Mohamed, Ontario Ministry of the Environment and Climate Change, Mohamed.Mohamed2@ontario.ca
Janis Thomas, Ont. Ministry of Environment & Climate Change, janis.thomas@ontario.ca

Abstract

Existing watershed models typically develop predictions at the mouths of larger rivers. However, a focus on the main outlet can overlook the significant differences in land management and physiography throughout Southern Ontario. Sentinel headwaters, such as those in the MWNS, provide an opportunity to incorporate detailed information into a regional model. We report on progress incorporating headwater sentinel watershed information to evaluate the relationship between agricultural land management, physiography, and watershed nutrient loading from agricultural watersheds throughout Southern Ontario. The deep historical data record at the sentinel watersheds provides an opportunity to understand in greater spatial detail how land management and water quality have evolved since the 1970’s.

1. Keyword
watersheds

2. Keyword
water quality

3. Keyword
computer models