Article

Modèle mathématique de gestion de la qualité de l'eau en rivière : application à l a rivière Yamaska

Canadian Science Publishing
Canadian Journal of Civil Engineering
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Abstract

In the more populous watersheds of southern Quebec eutrophication of surface waters is a current problem, linked to excessive nutrient loadings from various municipal, industrial, and agricultural sources. A simple mathematical model has been developed to identify the optimal strategies for controlling nutrient loadings at various points in a river basin; for this optimization the key water quality parameter is phosphorus and the objective is to meet a fixed water quality criterion (0.06 mg total phosphorus per litre) at minimum cost.The potential utility of the model in a water management context has been demonstrated in a case study of the Yamaska River, Quebec, which drains regions of intense agricultural activity and is also subject to phosphorus pollution from numerous point sources of municipal and industrial origin.

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