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Project title

Forestry and the potential for surface water acidification - Liming Study

Primary Funding Agency

Environmental Protection Agency

Co-Funding Organisation(s)

n/a

Lead Organisation

University of Dublin, Trinity College (TCD)

Lead Applicant

Norman Allott

Project Abstract

Liming has been used throughout Europe and North America as a means of mitigating the adverse effects of increased acidity of surface waters. The principle aim of liming is to increase alkalinity and pH to ensure suitable conditions for fish survival in particular salmonids. This review examines the range of available liming methods in detail with specific emphasis on their potential use in Ireland. The most promising method is the stream doser system because the dose rate can be varied automatically in response to changing stream conditions. Other methods that are worthy of further investigation include the spreading of lime on forest floors and the direct addition of limestone to stream-beds. Trials on liming of buffer strips and riparian areas have been carried out in a small number of studies but have all been considered unsuccessful. However a better understanding of hydrological factors is required before a full assessment of the latter two techniques can be made. The Water Framework Directive (WFD) (Directive 2000/60/EC) has recently been adopted by the European Union with the purpose of establishing a framework for the protection of inland surface waters transitional waters coastal waters and groundwater in the EU. The application of liming materials could either be classified as pollutants under the WFD or could also be viewed as a mitigation measure. As yet no clear policy has emerged regarding the use of lime in catchment with reference to the WFD.

Grant Approved

�12,729.63

Research Hub

Natural Environment

Research Theme

Improve our Knowledge on the State of our Water Resources and Pressures

Start Date

n/a

Initial Projected Completion Date

n/a