Landform Design and Modelling for Mine Rehabilitation and Closure Workshop

2 September 2019 | Cassia & Karri Rooms, The Westin | Perth, Western Australia

The post-mining landform is the canvass for all other aspects of ecological rehabilitation. Traditionally, the design approach to these landforms has been linear using empirical methods or generic designs. With the development of computer aided construction equipment, designers are no longer confined to straight lines, benches, contour banks and drop structures.

Popular with the community, geomorphic designs claim to ensure greater connectivity with the surrounding environment, visually and functionally by emulating fluvial geomorphic processes. But are these more complex designs cost effective? Are the outcomes more stable, and likely to function ecologically than traditional approaches? and how do we assess that? What of the role of Landscape Evolution Models (LEMs) and how significant are their limitations?

This workshop will provide a practical view of landform design both world-wide and in Australia. Presenters will discuss successes and failures, provide an integrated perspective of the different directions in which this field may develop, and interact with the attendees during question times, breaks and during the panel discussion.


Click to view the programme (subject to change)

8:30Welcome and introduction Harley Lacy, MCMS Pty Ltd and Associate Professor Jose F. Martín Duque, Complutense University of Madrid and Geosciences Institute, Spain
8:45Setting the scene: what have we done historically in landform design, how has it worked, what lessons can we learn Harley Lacy
9:10The importance of geotechnical stability in landform design – toward sustainability Professor David Williams, The University of Queensland
9:40Understanding the tension between material movement optimisation, ensuring erosional stability and geomorphic/hydrological considerations Chris Waygood, Golder Associates Pty Ltd
10:00Morning break
10:20Erosional stability: an overview on soil erosion modelling (RUSLE, WEPP) and landscape evolution modelling (SIBERIA, CAESAR, others) Associate Professor Greg Hancock, The University of Newcastle
11:00Geomorphic/hydrological considerations – landform design tools and software - GeoFluv-Natural Regrade, Talus Royal, River Morphology and the Canadian fluvial geomorphic approach Associate Professor Jose F. Martín Duque
11:45Integration of landform design and landscape evolution modelling Associate Professors Greg Hancock and Jose F. Martín Duque
12:00Panel discussion – challenges and observations, practitioners’ experience with these tools All
13:10Case studies and lessons learnt:
• European example
• NSW alluvial analogue example
• NSW non-alluvial analogue example
• Arid environment example
• Long duration assessments for uranium mining
14:30Afternoon break
15:00River restoration and stream diversion approaches Associate Professor Jose F. Martín Duque and Chris Waygood
15:40Integrating ideas, developing new ideas, addressing ongoing challenges in implementation and philosophy Panel discussion
17:00Workshop Close

Workshop Presenters

Associate Professor José F. Martín Duque
Complutense University of Madrid and Geosciences Institute, Spain

José’s extensive work has included design, modelling, monitoring and publishing in erosion and geomorphic rehabilitation of mined lands since 1995. He directs a specialised research and technology-transfer university group on this topic and teaches it for two master programs. José has led geomorphic rehabilitation projects on mined lands, and lectured about this innovative discipline, in many different countries.

Associate Professor Greg Hancock
University of Newcastle

Greg made his PhD on the use of the SIBERIA model under the supervision of Professor Garry Willgoose, inventor of the Landscape Evolution Model SIBERIA. He has more than 25 years of experience in the use of SIBERIA, and he is one of the most influential authors worldwide in the field of landform stability in mine rehabilitation. He also masters the use of other landscape evolution and soil erosion models.

Harley Lacy
Environmental Scientist
MCMS Pty Ltd

Harley has spent 30 + years involved in closure and rehabilitation of the many forms of mines and mine waste landforms.  This has included applied research and use of trials on mine tailings and waste landforms to optimise design and rehabilitation outcomes. In 1990 he founded Outback Ecology which was acquired by MWH 2013, then Stantec. He now consults independently to Stantec. Amongst other environmental activities, Harley works to help mining develop a positive legacy for society as a whole. 

Chris Waygood
Principal Mine Closure Specialist
Golder Associates Pty Ltd

Chris is a civil engineer with over 35 years of experience mainly in the fields of mining and water related projects ranging from large river diversions to water management plans. 

Over the last 7 years Chris has developed specific expertise in geomorphic landform design for mining overburden, designing and constructing these landforms on many of the large open cut mines in the Hunter Valley in NSW, Australia.  In terms of practical experience in Australia and adapting the Geofluv™ technique to meet the needs of the local mining community, Chris is probably the leading exponent in this field.

Professor David Williams
Director, Geotechnical Engineering Centre
The University of Queensland

Professor David Williams initiated and directs the industry-sponsored Geotechnical Engineering Centre at The University of Queensland, with industry funding of up to A$600,000/year, and University matching funding of $300,000/year. The Centre supports unique civil & geotechnical engineering, and mining & geotechnical engineering dual Major degree programmes, which graduate up to 65 students per year, and supports up to 40 PhD students. Professor Williams is also manager of the large open pit project. David’s primary research and consulting interests lie in the application of geotechnical principles to the management and rehabilitation of mine wastes, for which he enjoys an international reputation.