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Design of an arboreal shade project to control aquatic plant growth

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Title: Design of an arboreal shade project to control aquatic plant growth
Author: Hayman, D.; Fortin, M.; Seto, M.
Abstract: Shading of the Avon River with trees has been considered as one means of controlling the growth of nuisance aquatic plants during the summer months. The design of a shade tree planting project is considered in this report. Tree species considered here are black willow, silver maple and poplar, all of which are suited to bottom land growing conditions. It is shown that tree planting may prove very effective in limiting light that reaches the river. Other possible impacts include reduction of water temperatures and a reduction of dry weather flows. Planting costs are about $2000 per kilometer. Fencing and the possible need for land easements may each add $8000 to this figure. Flooding and ice scour are considered to be serious hazards to the successful establishment of trees. These factors likely mean that planting must be gradual starting in areas where natural protection from ice is currently available.
Date: 1983
Rights: Queen's Printer for Ontario, Crown Copyright, Non-Commercial Use Permitted
Rights Holder: Queen's Printer for Ontario

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