Spatial and Temporal Trends in Phosphorus and Suspended Solids Yields along an Urban River Reach
Thadsha Chandrakumaran, University of Waterloo, [email protected]
Micheal Stone, University of Waterloo, [email protected]
Nandita Basu, University of Waterloo, [email protected]
Monica Emelko, University of Waterloo, [email protected]
Abstract
Agriculture is recognized as the predominant source of phosphorus (P) loading into the Grand River, Canada’s largest tributary to Lake Erie; however, much less is known about P loading from urban point and nonpoint sources. Therefore, this study focusses on characterizing urban point and nonpoint source P and sediment along a highly urbanized reach of the Grand River by using existing hydrometric and water quality data collected by the City of Kitchener, City of Waterloo, Region of Waterloo, and the Grand River Conservation Authority (GRCA). Spatial and temporal (seasonal and annual) trends in P and sediment yields are evaluated using the Weighted Regression on Time, Discharge, and Season method developed by the United States Geological Survey, and then linked to land use types to identify and map key source areas as management priorities to inform several regional partner policies, including Grand River Water Management Plan and the City of Kitchener and Waterloo’s Stormwater Management Comprehensive Master Plans. Additionally, this study identifies key issues with current water quality monitoring programs and provides recommendations on specific program changes to better effectively estimate nutrient loads in the future.
1. Keyword
Grand River
2. Keyword
nutrients
3. Keyword
phosphorus
4. Additional Keyword
sediment
5. Additional Keyword
urban
6. Additional Keyword
land use