Using instrumented bulldozers to map spatial variation in the strength of regolith for bauxite mine floor rehabilitation

Mengler, Faron; Kew, Geoffrey; Gilkes, Robert; Koch, John M.

doi:10.1016/j.still.2005.08.017

Cited by 11 publications

(13 citation statements)

References 27 publications

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“…The tine of the deep ripper obviously did not break through the cemented subsoil at the low‐quality site, resulting in a restriction of coarse roots to upper soil layers. It is unlikely that cemented lateritic material can be improved as a medium for root growth using a single‐pass ripping operation (Mengler et al 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Soil profiles in post‐mining areas are heterogeneous and contain a range of regolithic materials that, due to their nature as well as the influence of mining, can prevent tree root penetration (Mengler et al 2006). Previous studies on rehabilitated bauxite mines in south‐western Australia have found that the root systems of young, eastern Australian eucalypt species were restricted to friable soil in riplines (Shea et al 1975; Tacey 1979; Dell et al 1983).…”

Section: Introductionmentioning

confidence: 99%

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Root Architecture of Jarrah (Eucalyptus marginata) Trees in Relation to Post‐Mining Deep Ripping in Western Australia

Szota¹,

Veneklaas

Koch

et al. 2007

Restoration Ecology

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This research aimed to investigate coarse root systems of Jarrah (Eucalyptus marginata Donn ex Sm.) trees at a 13-year-old restored bauxite mine site in south-western Australia. Excavations in an area with small trees (lowquality site) revealed that deep ripping equipment failed to penetrate the cemented lateritic subsoil, restricting coarse roots (roots >5 mm in diameter) to the top 0.5 m of the soil profile, resulting in fewer (1,344 stems/ha) and smaller (mean height 4.5 m) Jarrah trees. An adjacent area within the same pit (high-quality site), with a stand density of 3,256 stems/ha and a mean height of 8.0 m, had a kaolinitic clay subsoil which coarse roots penetrated to the average ripping depth (1.5 m). Trees at the low-quality site did not penetrate the subsoil with their taproot, relying instead on a large number of lateral (5.3-8.0/tree) and sinker (12.0-16.5/tree) roots. Taproots of trees on crests at the high-quality site also did not penetrate the subsoil, and in contrast to trees at the low-quality site, they produced fewer lateral and sinker roots (2.3 and 2.0/tree, respectively). Taproots of trees in riplines at the highquality site directly penetrated the ripline and these trees also produced fewer lateral and sinker roots (5.0 and 3.7/ tree, respectively) than those at the low-quality site. Jarrah trees appear to have opportunistic root systems capable of responding to a variety of soil conditions encountered in the post-mining landscape.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Root Architecture of Jarrah (Eucalyptus marginata) Trees in Relation to Post‐Mining Deep Ripping in Western Australia

Szota¹,

Veneklaas

Koch

et al. 2007

Restoration Ecology

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“…(Koch & Ward 2005); improved recolonization by invertebrates and other fauna (Moir et al . 2005); and improved deep ripping treatments (Mengler et al . 2006 (Colquhoun & Hardy 2000).…”

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confidence: 99%

Decommissioning Western Australia's First Bauxite Mine: Co‐evolving vegetation restoration techniques and targets

Grant¹,

Koch²

2007

Eco Management Restoration

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Summary The closure and decommissioning of Alcoa's first mine in Western Australia at Jarrahdale was a landmark for the company. This article describes the strategies and research contributing to successful mine rehabilitation in the Jarrah forest. Lessons learnt at Jarrahdale are being applied to other Western Australian mines. Over 30 years of research have resulted in a strong working knowledge of ecosystem function in this environment. The direct linkage of research to operational practices provides two‐way benefits for practitioners and researchers. The Jarrahdale mine is the first mine in Western Australia to have received a certificate of completion from the state government.

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“…A key to bauxite mine floor regolith exposed by mining has been developed by (Table 1). The key is designed for use by land managers and is an extension of the preliminary scheme published by Mengler et al (2006). It uses field-based pedological classifications of materials (texture, pedality, colour, coarse fragments) with no requirement for laboratory analysis.…”

Section: Introductionmentioning

confidence: 99%

Nature and origins of granitic regolith in bauxite mine floors in the Darling Range, Western Australia

Kew

Gilkes

Mathison

2008

Australian Journal of Earth Sciences

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Using instrumented bulldozers to map spatial variation in the strength of regolith for bauxite mine floor rehabilitation

Cited by 11 publications

References 27 publications

Root Architecture of Jarrah (Eucalyptus marginata) Trees in Relation to Post‐Mining Deep Ripping in Western Australia

Root Architecture of Jarrah (Eucalyptus marginata) Trees in Relation to Post‐Mining Deep Ripping in Western Australia

Decommissioning Western Australia's First Bauxite Mine: Co‐evolving vegetation restoration techniques and targets

Nature and origins of granitic regolith in bauxite mine floors in the Darling Range, Western Australia

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