Oakville Creek water quality study July 1973

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Water Resources Branch, Ontario Ministry of the Environment

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Ontario Ministry of the Environment

Abstract

An intensive water quality study of the main branch of Oakville Creek was undertaken primarily to document the impact on water quality of the proposed expansion of the Town of Milton to a population of 28,000 with improved sewage treatment facilities and low flow augmentation from the new Hilton Falls Reservoir and from Kelso Reservoir. With the co-operation of the Halton Region Conservation Authority, gates at the Kelso Dam were closed in an attempt to create a low flow condition in Oakville Creek downstream from the Town of Milton. Due primarily to leakages at the outlet of the reservoir, the lowest stream flow achieved was an average of 10.9 cubic feet per second measured at Derry Road. At this flow, a water quality survey of the stream was conducted for a 72-hour period from July 16 to July 19. This initial survey was followed by an additional 72-hour study which was carried out between July 24 and July 27. Because of the time consuming nature of the biological work, only some of the sampling was carried out during these two 72-hour periods; the remainder of the samples were collected between late June and early August. This report is a review of the study and includes a description of the present land and water uses and changes in land and water use which may take place in the Oakville Creek basin. Detailed analyses of the survey results and the developments of water quality models are included.

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Archive of Agri-Environmental Programs in Ontario, Ontario Ministry of the Environment, Biological Surveys, Investigations Reports, water quality, sewage treatment facility, stream rechannelization, land use, water use, urban expansion, water quality impairment, nutrients, dissolved oxygen, organic material

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