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Evaluating the Potential to Reduce Phosphorus Loadings through Water Reuse in the Lake Simcoe Watershed, Ontario, Canada

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Lake Simcoe, one of the largest inland lakes in Ontario, supports a cold-water fishing community that is vital to the local tourism economy, but is experiencing significant eutrophication from excessive phosphorus loadings that threatens this aquatic habitat. In the interest of pursuing alternative means of reducing phosphorus loadings, this study evaluated the feasibility of implementing water reuse to divert effluent from the watershed's fourteen water pollution control plants. Three conceptual water reuse scenarios were developed based on a demand screening analysis to illustrate the range of implementation alternatives: agricultural irrigation, urban reuse and land application as a means of effluent disposal. This study demonstrates a powerful, low-cost methodology to evaluate the potential cost-effectiveness of water reuse for a variety of applications. The methodology is scalable to encompass large or small areas, and the parameters of the analysis can be readily modified to suit the management objectives of the operating authority, agency or municipality.
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Keywords: Lake Simcoe; Phosphorus; Water reuse

Document Type: Research Article

Publication date: 2011-01-01

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