A review of the effectiveness and feasibility of alternate liming techniques to mitigate for acid rain effects in Nova Scotia / Wesley White. : Fs70-1/2000-057E-PDF

This paper is a summary of some techniques that may be applicable to liming acid rivers in Nova Scotia. It emphasises the preservation of Atlantic salmon habitat. Acid rain has eliminated salmon entirely from some rivers in Nova Scotia and reduced salmon production in many others. Controls on atmospheric emissions have produced less improvement than expected in the pH of Nova Scotia's rivers. As an interim measure, alkaline substances (lime) can be added to acidified surface waters to raise their pH. Once liming has been carried out, the higher pH can only be maintained by frequent or continual liming. This paper describes several methods of applying lime to lakes and rivers. The factors that affect efficiency of dissolution are discussed. Methods are described for calculating the required lime dose for each method of liming. The relative costs, efficiency and reliability of different liming techniques are compared.

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