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Water Quality Predictions - the Ok Chem Model

Author: Environmental Geochemistry International Pty Ltd

Date: November 2005

To predict the quality of waters in the Ok Tedi and Fly River main channels, Environmental Geochemistry International Pty Ltd developed the OkChem model for use by OTML in assessing potential future impacts associated with mine derived sediments within the river system.  While a companion to the OkARD model, OkChem does not replace OkARD.  Rather, it uses acidity outputs calculated by OkARD to predict chages in river water quality associated with mining, processing and waste management operations by OTML.