Delta Hydro Engineers (Pty) Ltd The Flood Specialists

Professional services

TSF Water Balance (Tailings Storage Facilities) in South Africa

Rainfall-runoff, pond storage & return-water planning for TSFs — mining water studies by Delta Hydro Engineers.

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What is a TSF water balance?

A TSF water balance reconciles rainfall, runoff, storage, decant, seepage, and return water—supporting mine planning, environmental performance, and closure thinking.

Pond dynamics, not spreadsheet folklore

TSF balances go wrong when decant rules and storm sequencing are oversimplified. We align timestep choices with pond response times, document upset cases, and show which assumptions move annual decant risk the most.

Closure-aware thinking

Where closure phases change beach profiles and seepage paths, we document how the balance evolves so later studies do not contradict the operating-life model silently.

What we typically need from you

  • Pond geometry stages, decant systems, return water circuits, and pumping rules
  • Rainfall series preferences, evaporation methods, and seepage test data if available
  • Deposition plan or beach profiles that change active storage over life-of-mine
  • Environmental discharge limits and monitoring locations influencing operations

Where we add technical depth

  • Timestepped reconciliation of rainfall, runoff, storage, decant, seepage, and return flows
  • Sensitivity to freeboard rules, liner leakage, and storm clustering assumptions
  • Linkage to mine planning schedules and closure water management concepts
  • Figures that environmental and tailings engineers can embed in reporting

When do you need this?

  • Operating TSFs with dynamic pond levels and decant management
  • Closure planning requiring long-term water balances
  • Environmental performance tied to freeboard and seepage management

Our approach

  1. 1

    System definition

    Map inflows, losses, return water, and operational circuits.

  2. 2

    Scenario modelling

    Run monthly/seasonal balances under rainfall variability.

  3. 3

    Risk & monitoring

    Identify controlling scenarios and monitoring triggers.

What you'll receive

  • Water balance report
  • Scenario tables and figures

Relevant SA standards

  • NEMA & mine water management expectations

Case study

Ask us for anonymised examples relevant to your sector.

FAQ

Monthly vs daily timestep?

Timestep depends on pond dynamics and operational controls—scoped to the study purpose.

Seepage modelling?

Seepage can be integrated with geotechnical inputs; we document interfaces explicitly.

Return water circuits?

We map return water flows and treatment interactions where they affect pond management.

Closure-phase balances?

Long-term scenarios can be included to support closure planning and water treatment needs.

What if rainfall series is short?

We discuss regionalisation and sensitivity to extend confidence in scenario outcomes.

Author

Robert Fortuin

Areas we serve

We prepare location-specific briefs for major centres across South Africa — see locations.

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