EXPERIENCE

Experience

Bruce Randell, BSc (Eng), PhD, Pr.Eng

Bruce Randell is a Water Resource Engineer with over seventeen years experience in applied hydrology, hydrological and hydraulic modelling and design of stormwater and tailings dam related infrastructure. Bruce has skills in water balance modelling, water resource modelling, stormwater management plans (concept through to detailed design), EIA specialist studies, streamflow modelling and measurement. Goldsim has been extensively used for modelling, as have various other mainstream software packages.

Projects


Mine water balance modeling:

  • Goldsim water balance models were developed for scenario analysis and water management decision making purposes on both operational and management levels.
  • Projects throughout Africa and South Africa on gold, diamond, iron ore, copper, coal, nickel, base metal mines.

Tailings dam water balance modeling:

  • Goldsim models to simulate the water balance around a tailings dam. Modeling usually includes return water dam sizing.
  • Rainfall inputs are generally stochastic to allow for scenario analysis, long-term analysis or the statistical analysis for short-duration projects.
  • Mining projects throughout Africa and South Africa on gold, diamond, copper, coal, nickel, base metal, and iron ore tailings dams.
  • Industrial projects on power stations, iron and steel works.

Open cast pit water balance modeling:

  • Goldsim models to calculate pit water make in opencast operations, especially pits that have concurrent excavation and rehabilitation. Modeling takes into account the dynamics of the working pit configuration and rehabilitation progress during the simulation period.
  • Rainfall inputs are generally stochastic to allow for scenario analysis, long-term analysis or the statistical analysis for short-duration projects.
  • Modeling typically involves final void sizing for closure planning.
  • Projects throughout Africa and South Africa on gold, copper, diamond, iron, ore, coal (with concurrent rehabilitation).

Water quality modeling:

  • The water quality modeling related to pollution control dams involves modeling conservative variables, taking into account the surrounding catchments, dam operating rules and hydrology associated with the system. Daily continuous modeling is used in conjunction with relevant regulations (e.g. Regulation 704 of the South African National Water Act) to formulate solutions for clients.
  • Water resource projects involve determining the likely impact of process and contaminated stormwater discharges from mines and industry.
  • Mining projects throughout Africa and South Africa on gold, copper, nickel, coal mines (discard dumps and in pit water quality).
  • Industrial projects throughout South Africa on power stations, chrome and steel plants, aluminium smelters, oil producers.
  • Water resource projects in the DRC and throughout South Africa. Major rivers include the Olifants and Tugela Rivers in South Africa.

Mine water balance modelling for ICMI Cyanide code compliance:

  • Developed probabilistic mine-wide water balance models for scenario analysis and water management decision making purposes - a requirement of the ICMI Cyanide code. The models have been extensively audited and accepted as suitable water balance models for ICMI Cyanide code compliance.
  • Project locations include South Africa, Namibia, Ghana, Mali, and Guinea.

Sediment surveying and modeling:

  • Involved in the sediment surveys that were conducted on the Katse and Muela dams that form part of the Lesotho Highlands Water Project. Experience includes mapping floor profiles using sonar equipment and calculatingsediment volumes.

Pollution control dam sizing:

  • Pollution control dams sized according to relevant legislation (e.g. Regulation 704 of the South African National Water Act) or in the absence of legislative guidelines, the use of impact assessments on the receiving environment to determine allowable releases and resultant dam sizing.
  • Mining projects throughout Africa and South Africa on Gold, Diamond, Copper, Nickel, Coal, Base metal mines.
  • Industrial projects throughout South Africa on power stations, chrome and steel plants, and aluminium smelters.

Stormwater management plans:

  • Mining projects in the DRC, Lesotho and throughout South Africa on gold, diamond, copper, nickel, coal, base metal mines.
  • Industrial projects throughout South Africa on chrome and steel plants, and aluminium smelters.
  • Concept through to detailed design.

Closure storm water management

  • Closure storm water management on tailings storage facilities, waste rock dumps, and discard dumps

Infrastructure design:

  • Detailed design of silt traps, stormwater channels, dissipation structures, Parshall flumes, headwalls.

EIA surface water specialist studies:

  • Conducted specialist surface water studies as part of small and large-scale EIA’s.
  • This involves baseline assessments, setup of surface water monitoring programs, general hydrology, hydraulics,modeling and impact assessment, reporting and attendance and presentation at open house/public meetings.
  • Projects in the DRC, Mozambique and throughout South Africa on mining, heavy industrial, municipal and railway projects.

Flood peak and floodline calculation:

  • River reach floodlines in Mali, the DRC and throughout South Africa for housing developers, mining, industrial municipal and private clients.
  • Large-scale floodlines for the entire Umhlatuze municipal area (Richards Bay, Empangeni and surrounds), and the Clover and Blesbokspruit (Benoni, Brakpan, Springs and Heidelburg).

Catchment studies and runoff modeling:

  • Applications include runoff into pollution control dams, diversion canals, silt traps and through various hydraulic structures. Models used include ACRU, WRSM2000, WR90, RAFFLER and purpose-built Goldsim models.
  • Various projects throughout South Africa and Africa.

IWMP baseline hydrology and impact assessment:

  • Conducted baseline hydrological assessment of the rivers that flow past two paper mills. This included ACRU and other rainfall-runoff modeling. Goldsim was used to do contionuous daily modeling of the impacts of effluent from these mills into the receiving waters.

Flow measuring:

  • Involved in flow measuring in the field using both propeller and electromagnet electromagnetic flow meters in the DRC and throughout South Africa on both small (120 ℓ/s) ans large rivers (10 m3/s).