Document Type

Conference Proceeding

Publisher

International Mine Water Association

Faculty

Faculty of Computing, Health and Science

School

School of Natural Sciences / Centre for Ecosystem Management

RAS ID

14121

Comments

This article was originally published as: Mccullough, C. D., Radhakrishnan, N. K., Lund, M. A., Newport, M. L., Ballot, E., & Short, D. (2012). Riverine breach and subsequent decant of an acidic pit lake: evaluating the effects of riverine flow-through on lake stratification and chemistry. Proceedings of International Mine Water Association (IMWA) Conference. (pp. 533-540). Bunbury, Australia. International Mine Water Association. Original article available here

Abstract

Breach and subsequent decant of an acidic brackish pit lake in the Collie Coal region in south-western Australia occurred during flooding of a pre-mining diverted eutrophic river. Inflowing fresher river water with high alkalinity and nutrient concentrations settled over more saline and acidic pit lake water. This created a halocline with better mixoliminion water quality and monimolimnion water quality typical of the pre-breach lake. Flow-through may represent the best long-term mine closure option for this and other pit lakes in the state and internationally where pit lake water quality degrades over time when excised from regional water systems.

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