Sedimentation rates in two pit lakes: Implications for riverine flow-through as a closure strategy

Document Type

Conference Proceeding

Publication Title

IMWA 2019 Conference – Mine Water: Technological and Ecological Challenges

Publisher

Perm State University

School

School of Science / Centre for Ecosystem Management

RAS ID

29889

Comments

Lund, M., Polifka, J., Quintero Vasquez, M., Ramesseur, R., Bignell, R., & Yangzom, D. (2019). Sedimentation rates in two pit lakes: Implications for riverine flow-through as a closure strategy. In E. Khayrulina, Ch. Wolkersdorfer, S. Polyakova, & A. Bogush (Eds.), IMWA 2019 Conference – Mine Water: Technological and Ecological Challenges (pp. 477 – 484). Perm, Russia: Perm State University. https://www.imwa.info/imwaconferencesandcongresses/proceedings/306-proceedings-2019.html

Abstract

Lack of organic matter inputs into a pit lake inhibits ecological development. Connecting a river to a pit lake should add organic matter to the lake. Sedimentation traps and sediment sampling was undertaken in two co-occurring pit lakes: one with river flow-through (Lake Kepwari) and one without (WO5H) in Collie, Western Australia.Carbon in the sediment did not vary between lakes or depths. Sedimentation rates did not vary between lakes during low/no river inflow periods. River inflow did increase sedimentation but without increasing allochthonous inputs of C. Even with river inflow C accumulation in the lakes remains very low.

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