Document Type

Conference Proceeding


Aachen University


Faculty of Computing, Health and Science


School of Natural Sciences / Centre for Ecosystem Management




This article was originally published as: Mueller, M., Eulitz, k., Mccullough, C. D., & Lund, M. A. (2011). Model-based Investigations of Acidity Sources and Sinks of a Pit Lake in Western Australia. Paper presented at the 11th IMWA Congress Mine Water - Managing the Changes. Aachen University. Aachen, Germany. Original article available here


Lake Kepwari is a rehabilitated lake in the Collie Basin lignite mining area in Western Australia. The water quality of Lake Kepwari was modeled with the pit lake hydrodynamic and water quality model PITLAKQ. Based on a hydrodynamically validated model, water quality scenarios were used to quantify the sensitivity of different acidity sources including groundwater exchange, surface runoff and erosion, providing new insights into the system. The technique of monthly aggregation of all sources and sinks of acidity, based on detailed model output, provided the basis for useful conclusions. Model results suggest a new focus of field investigations to improve modeling certainty and a follow-up, improved phase of modeling.