Audio for "Revegetation of Mine Wastes in Arid Environments: Linking Above- and Below-Ground Performance," Aug 12, 2020

 
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By Contaminated Site Clean-Up Information (CLU-IN). Discovered by Player FM and our community — copyright is owned by the publisher, not Player FM, and audio is streamed directly from their servers. Hit the Subscribe button to track updates in Player FM, or paste the feed URL into other podcast apps.
Hard rock mining results in extensive land disturbance due to economic mineral extraction and residual mine waste deposition. Revegetation accelerates reclamation of land disturbed by mining; however, the revegetation of mine waste sites in arid regions of the world has unique environmental challenges due to low water availability and sensitive ecologies. Further complicating the issue is the myriad of wastes that exist. Here we focus on mine tailings, which exhibit a wide range of pH and metal content, as well as waste rock. In this presentation, we will discuss what we have learned over the last decade about how below-ground metrics are related to and can predict revegetation success under a variety of conditions and revegetation approaches. We will present data from legacy and modern waste sites examining both direct planting into mine waste and cap and plant scenarios. We are using these data to identify below-ground metrics that correlate with vegetation establishment patterns and are easy to measure; and then using the identified metrics to develop guidance for prediction of tipping points for vegetation success or failure. An additional outcome of this work is creation of the University of Arizona Center for Environmentally Sustainable Mining which has facilitated a partnership with Arizona copper companies called the Collaborative Industry-University Research Initiative on Revegetation of Mine Wastes. This partnership has enabled both a comprehensive assessment of multiple revegetation strategies under diverse conditions and an open atmosphere wherein results are shared among all partners through annual reports and meetings To view this archive online or download the slides associated with this seminar, please visit http://www.clu-in.org/conf/tio/mining-reveg_081220/

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