Development of a liming prediction model for Llyn Brianne

This paper describes a model which was developed to simulate the effect of automated liming on the quality of a Welsh lake (Llyn Brianne) and its outf low river. The objective was to model the amount of lime required to dose t he input streams under a variety of conditions. It was concluded that it wo uld be feasible to install automatic-dosing equipment on the two input stre ams to deliver sufficient lime to ensure that the pH of the lake and water downstream was controlled at a pH value of 6.0 or greater, thus stabilizing water quality for fish and other aquatic biota.