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All existing and proposed mining operations are potentially at risk of flooding. An understanding of
the flood risk for existing and planned mines can safeguard people, infrastructure and production
continuity.
MINE SITE SURFACE WATER MANAGEMENT AND
FLOOD RISK ASSESSMENT
Understanding the hydrologic, hydraulic, and
geomorphological response to flooding events allows
informed decisions for mine planning and operation. Using
detailed land survey information, a flood assessment can
provide input regarding the flood extent, duration, and other
characteristics to allow assessment of flood-related
consequence to the mine site.
In addition to legal implications, flooding may impact upon:
Worker safety
Production – potential significant economic loss
Environment – water disposal, clean-up costs, or
impacts on wildlife and vegetation
Long-term reputation – media coverage, share price
Re-insurance after the event – potential increase in
insurance premiums
MWH uses hydrological and hydraulic modelling to estimate
frequency and magnitude of floods, assess the potential
impacts of flooding on the project area and inform the design
of flood protection and key infrastructure to protect your
business and reduce the impacts of flooding.
Rainfall-runoff and water balance modelling
1D and 2D open channel and floodplain hydraulic
modelling, using HEC-RAS, TUFLOW, InfoWorks, MIKE suite, waterRIDE and other industry-standard applications
Flood inundation risk and flood hazard mapping
Modelling of flood management and mitigation
scheme options
Assessment of environmental effects
River diversions and realignment
Bank stabilisation and erosion studies
Hydraulic structures design
Material take-offs, cost estimation, and preparation of
construction plans and specifications
Surface water engineers and mine staff can together estimate
the costs and relative risks of flooding impacts to the mine
operations. Outcomes of the flood analysis can be further
assessed through a multi-criteria analysis and risk
assessment process to identify the most cost-effective
mitigation option.
Herberts Creek Diversion Concept Design, BHP Billiton
Iron Ore
Whaleback Creek Hydraulic Modelling, BHP Billiton Iron
Ore
Weeli Wolli geomorphology assessment, Rio Tinto Iron
Ore
Marillana Creek flood management options investigation,
BHP Billiton Iron Ore
Mt Webber development project surface water
assessment, Atlas Iron Ltd
Abydos Stage 2 surface water assessments, Atlas Iron
Ltd
Duchess Paradise surface water assessment, Rey
Resources
Cape Preston Sino Iron Project floodplain modelling,
CITIC Pacific Mining
Wodgina Stage 3 surface water assessment, Atlas Iron
Ltd
O’Callaghans area flood assessment and stormwater
management, Newcrest Mining Limited
Ridley 2D hydrodynamic model flood assessment, Atlas
Iron Ltd
Solomon surface water assessment, Fortescue Metals
Group
Pardoo mine closure hydrological Investigation, Atlas Iron
Ltd
Stockton Ridge Mine, Solid Energy New Zealand Ltd
Sedimentation pond design, GEMCO
Johan van Rensburg - Principal Hydrologist
Email: [email protected]
Direct Line: +61 8 9211 1404
Mobile: +61 448 089 413
Office Phone: +61 8 9388 8799
Krey Price - Senior Civil Engineer
Email: [email protected]
Direct Line: +61 8 9211 1439
Mobile: +61 400 367 542
Office Phone: +61 8 9388 8799
