Authors: Lowry, JBC; Saynor, MJ

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Lowry, JBC & Saynor, MJ 2019, 'Developing a rehabilitation standard for landform stability for a uranium mine in northern Australia', in AB Fourie & M Tibbett (eds), Mine Closure 2019: Proceedings of the 13th International Conference on Mine Closure, Australian Centre for Geomechanics, Perth, pp. 425-434,

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The rehabilitation works at the Ranger Uranium Mine (RUM) in the Northern Territory of Australia will be completed by 2026. As part of the process of mine closure and rehabilitation, the Supervising Scientist Branch of the Australian Government’s Department of the Environment and Energy have developed a series of rehabilitation standards which will be applied to the mine site. Here, we describe the rehabilitation standard for landform stability, which will be used to assess the rehabilitated landform. This standard aims to promote the development of a stable landform that functionally merges with the surrounding landscape. To this end, the standard identifies two primary objectives. The first seeks to ensure that buried tailings are not exposed to the environment for a period of at least 10,000 years, while the second seeks to ensure that the erosion characteristics of the constructed landform approach those of comparable landforms in surrounding undisturbed areas. We describe the background and scientific basis to these objectives, and the measures prescribed to attain them. This includes the use of landform evolution modelling technologies and the development and application of monitoring tools and regimes to monitor the evolution of the landform over time. Finally, we describe how the development of this standard complements the development of an ecological restoration standard for the RUM. While the standards have been developed for a specific mine, we believe the principles developed may be applicable to existing and future mine rehabilitation activities elsewhere.

Keywords: rehabilitation standard, landform stability, erosion, modelling

Commonwealth of Australia 1978, Environment Protection (Alligator Rivers Region) Act 1978.
Coulthard, T, Hancock, GR & Lowry, J 2012, ‘Modelling soil erosion with a downscaled landscape evolution model’, Earth Surface Processes and Landforms, vol. 37, pp. 1046–1055.
Coulthard, TJ, Neal, JC, Bate, PD, Ramirez J, de Almeida, GAM & Hancock, GR 2013, ‘Integrating the LISFLOOD-FP 2D hydrodynamic model with the CAESAR model: Implications for modelling landscape evolution’, Earth Surface Processes and Landforms, vol. 38, issue 15, pp. 1897–1906, DOI: 10.1002/esp.3478
Cull, RF, Hancock, G, Johnston, A, Martin, P, Martin, R, Murray, AS, …& Wasson, RJ 1992, ‘Past, present and future sedimentation on the Magela plain and in its catchment’, in RJ Wasson (ed.), Modern sedimentation and late Quaternary evolution of the Magela plain, Research Report 6, Supervising Scientist for the Alligator Rivers Region, Canberra, pp. 226–268.
Department of Environment and Heritage Protection 2014, Rehabilitation requirements for mining resource activities. Report EM1122, ESR/2016/1875, Version 2, Brisbane.
Evans, KG 2000, ‘Methods for assessing mine site rehabilitation design for erosion impact’, Australian Journal of Soil Research, vol. 38, issue 2, pp. 231–248.
Evans, KG & Willgoose, GR 2000, ‘Post-mining landform evolution modelling. II. Effects of vegetation and surface ripping’, Earth Surface Processes and Landforms, vol. 25, issue 8, pp. 803–823.
Evans, KG, Willgoose, GR, Saynor, MJ & House, T 1998, Effect of vegetation and surface amelioration on simulated landform evolution of the post-mining landscape at ERA Ranger Mine, Northern Territory, Supervising Scientist Report 134, Canberra.
Evans, K, Saynor, M, Willgoose G, & Riley, SJ 2000, ‘Post-mining landform evolution modelling. I. Derivation of sediment transport model and rainfall-runoff model parameters’, Earth Surface Processes and Landforms, vol. 25, issue 7, pp.743–763.
Garde, M 2015, Closure Criteria Development—Cultural, Darwin.
Hancock, GR, Lowry, JBC, Coulthard, TJ, Evans, KG & Moliere, DR 2010, ‘A catchment scale evaluation of the SIBERIA and CAESAR landscape evolution models’, Earth Surface Processes and Landforms, vol. 35, pp. 863–875.
Hancock, GR, Willgoose, GR & Lowry, J 2014, ‘Transient landscapes: gully development and evolution using a landscape evolution model’, Stochastic Environmental Research and Risk Assessment, vol. 28, issue 1, pp. 83–98, doi: 10.1007/s00477-013-0741-y
Hancock, GR, Lowry, J & Coulthard, T 2015, ‘Catchment reconstruction – erosional stability at millennial time scales using landscape evolution models’, Geomorphology, vol. 231, pp. 15–27.
Hancock, GR, Lowry, JBC & Coulthard, TJ 2016a, ‘Long-term landscape trajectory – can we make predictions about landscape form and function for post-mining landforms’, Geomorphology, vol. 266, pp. 121–132.
Hancock, GR, Coulthard, TJ & Lowry, JBC 2016b, ‘Predicting uncertainty in sediment transport and landscape evolution – the influence of initial surface conditions’, Computers and Geosciences, vol. 90, pp. 117–130.
Hancock, GR, Lowry, JBC & Saynor, MJ 2016c, ‘Early landscape evolution – a field and modelling assessment for a post-mining landform’, Catena, vol.147, pp. 699–708.
Hancock, GR, Verdon-Kidd, D & Lowry, JBC 2017, ‘Soil erosion predictions from a landscape evolution model – An assessment of a post-mining landform using spatial climate change analogues’, Science of the Total Environment, vol.601-602, pp. 109–121.
Humphrey, CL, Faith, DP & Dostine, PL 1995, ‘Base-line requirements for assessment of mining impact using biological monitoring’, Australian Journal of Ecology, vol. 20, pp. 150–166.
Humphrey, CL, Bishop, KA & Dostine, PL 2016, ‘Vulnerability of fish and macroinvertebrates to key threats in streams of the Kakadu region, northern Australia: assemblage dynamics, existing assessments and knowledge needs’, Marine and Freshwater Research, vol. 69, pp. 1092–1109, doi: 10.1071/MF16175
Jones, DR, Humphrey, C, van Dam, R, Harford, A, Turner, K & Bollhoefer, A 2009, ‘Integrated chemical, radiological and biological monitoring for an Australian uranium mine - a best practice case study’, Proceedings International Mine Water Conference, Pretoria, pp. 95–104.
Laflen, JM, Elliot, WJ, Simanton, JR, Holzhey, CS & Kohl, KD 1991, ‘WEPP soil erodibility experiments for rangeland and cropland soils’, Journal of Soil and Water Conservation, pp. 39–34.
Loch, RJ, Connolly, RD & Littleboy, M 2000, ‘Using rainfall simulation to guide planning and management of rehabilitated areas: Part 2, Computer simulations using parameters from rainfall simulation’, Land Degradation and Development, vol. 11, issue 3, pp. 241–255.
Lowry, J, Evans, K, Coulthard, T, Hancock, G & Moliere, D 2009, ‘Assessing the impact if extreme rainfall events on the geomorphic stability of a conceptual rehabilitated landform in the Northern Territory of Australia’, in A Fourie & M Tibbett (eds), Proceedings of the Fourth International Conference on Mine Closure, Australian Centre for Geomechanics, Perth,
pp. 203–212.
Lowry, J, Coulthard, T & Hancock, G 2013, ‘Assessing the long-term geomorphic stability of a rehabilitated landform using the CAESAR-Lisflood landscape evolution model‘, in M Tibbett, AB Fourie & C Digby (eds), Proceedings of the Eighth International Conference on Mine Closure, Australian Centre for Geomechanics, Perth, pp. 611–624.
Lowry, J, Saynor, M, Erskine, W, Coulthard, T & Hancock, G 2014, ‘A multi-year assessment of landform evolution predictions for a trial rehabilitated landform’, Proceedings of the Life-of-Mine 2014 Conference, Australasian Institute of Mining and Metallurgy, Melbourne, pp. 67–80.
Lowry, J, Erskine, W, Pickup, G, Coulthard, T & Hancock, G 2015a, Future Directions for Application of Landform Modelling by the Supervising Scientist: Response to the Review of the application of the CAESAR-Lisflood model by the eriss Hydrologic, Geomorphic and Chemical Processes program, Supervising Scientist Report 210, Supervising Scientist, Darwin.
Lowry, J, Hancock, G & Coulthard, T 2015b, ‘Assessing the evolution of a post-mining landscape using landform evolution models at millennial time scales’, in A Fourie, M Tibbett, L Sawatsky & D van Zyl (eds), Proceedings of the 10th International Conference on Mine Closure, InfoMine, Vancouver, pp. 207–220.
Lowry, JBC, Verdon-Kidd, D, Hancock, GR, Saynor, MJ & Coulthard, TJ 2016, ‘Application of synthetic rainfall data to long-term modelling of a rehabilitated landform’, Proceedings of the Life-of-Mine 2016 Conference, Australasian Institute of Mining and Metallurgy, Melbourne, pp. 75–79.
Moliere, DR & Evans, KG 2010. ‘Development of trigger levels to assess catchment disturbance on stream suspended sediment loads in the Magela Creek, Northern Territory, Australia’, Geographical Research, doi: 10.1111/j.1745-5871.2010.00641.x
Moliere, DR, Saynor, MJ & Evans, KG 2005, ‘Suspended sediment concentration-turbidity relationships for Ngarradj - a seasonal stream in the wet-dry tropics’ Australian Journal of Water Resources, vol. 9, pp. 37–48.
Onstad, CA & Foster, GR 1975, ‘Erosion modelling on a watershed’, Transactions of the American Society of Agricultural Engineers, vol. 26, pp. 1102–1104.
Renard, KG, Laflen, JM, Foster, GR & McCool, DK 1994, ‘The revised universal soil loss equation’, in R Lal (ed.), Soil Erosion Research Methods, Soil and Water Conservation Society, Ankeny, 2nd edn, pp. 105–124.
Saynor, MJ & Erskine, WD 2016, ‘Bed Load losses from Experimental Plots on a Rehabilitated Uranium Mine in Northern Australia’, Proceedings of the Life-of-Mine 2016 Conference, Australasian Institute of Mining and Metallurgy, Melbourne.
Saynor, MJ, Lowry, J, Erskine, WD, Coulthard, T, Hancock, G, Jones, D & Lu, P 2012, ‘Assessing erosion and run-off performance of a trial rehabilitated mining landform’, Proceedings of the Life-of-Mine 2012, Brisbane, Australasian Institute of Mining and Metallurgy, Melbourne.
Schumm, SA, Costa, JE, Toy, TJ, Knox, JC & Warner, RF 1984, ‘Geomorphic hazards and uranium tailings disposal’, Management of Wastes from Uranium Mining and Milling, International Atomic Energy Agency, Vienna, pp. 111–124.
Skinner, CJ, Coulthard, TJ, Schwanghart, W, Van De Wiel, M & Hancock, G 2018, ‘Global sensitivity analysis of parameter uncertainty in landscape evolution models’, Geoscientific Model Development, vol. 11, pp.4873–4888.
Stewart-Oaten, A, Murdoch, WW & Parker, KR 1986, ‘Environmental impact assessment: ‘Pseudoreplication’ in time?’, Ecology, vol. 67, pp. 929–940.
Stewart-Oaten, A, Bence, JR & Osenberg, CW 1992, ‘Assessing effects of unreplicated perturbations: no simple solutions’, Ecology, vol. 73, pp. 1396–1404.
Supervising Scientist Branch 2018, Landform Stability — Rehabilitation Standard for the Ranger uranium mine (version 1), Supervising Darwin, viewed 14 December 2018,
Verdon-Kidd, D & Hancock, G 2016, Development of synthetic rainfall datasets to enable long-term landform modelling for periods of up to 10,000 years in the Alligator River Region, University of Newcastle, Callaghan.
Willgoose, GR, Bras, RL & Rodriguez-Iturbe, I 1989, A physically based channel network and catchment evolution model, TR 322, Massachusetts Institute of Technology, Boston.
Wischmeier, WH & Smith, DD 1978, Predicting rainfall erosion losses – a guide to conservation planning, Agriculture Handbook No. 537.2, United States Department of Agriculture.
Zapico, I, Laronne, JB, Martin-Moreno, C, Martin-Duque, JF, Ortega, A & Sanchez-Castillo, L 2017, ‘Baseline to evaluate off-site suspended sediment-related mining effects in the Alto Tajo Natural Park, Spain’, Land Degradation & Development, vol. 28, pp. 232–242.

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