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GIBB’s expertise spans all aspects of water resource management, from feasibility studies to planning, design, implementation and maintenance including:

Water resources planning

The increasing scarcity of fresh water necessitates assessment of the quantity and quality of existing water resources. GIBB’s expertise covers water and bulkwater resource planning, supply, storage and conveyance and flood-risk management, with services including:

• Water demand forecasting
• Surface runoff hydrological studies (to determine water yield potential of catchments for the purposes of the modeling of streamflow reduction activities like afforestation, irrigation, farm dams and reservoirs)
• Reservoir yield determinations and yield risk assessments (for existing and proposed reservoirs)
• Modelling of existing and proposed flow diversion schemes and weirs
• System yield analyses and assessments and determination of optimal operation policies for interlinked inter-basin bulk water supply schemes
• Preparation of hydrological data (for the compulsory ecological reserve determinations of the National Water Act)
• Hydro-salinity modeling (of total salts concentrations in surface water)
• Project management and administrative support (for integrated multi-disciplinary reconnaissance, pre-feasibility and hydrological and development studies of feasibility catchment)
• Computer based models and geographic information system tools (Water Situation Assessment Model decision support tool for desktop reconnaissance level water resource planning; WRSM2000 rainfall-runoff and land use water requirements model; Water Resources Yield Model; Water Resources Planning Model; ACRU Model; and WQT Hydro-Salinity Model)

Bulk water storage

Feasibility studies, design, inspection, monitoring, risk evaluation, refurbishment and remedial works design in all stages of the life-cycle of dam projects, including:

• Hydraulic analysis and design
• Seismic risk analysis
• Geotechnical and geological analysis and modeling (including foundation treatment, materials selection and processing, curtain and consolidation grouting)
• Structural analysis and design (including finite elements analysis, concrete and steelwork design and architectural input)
• Hydrological analysis and design (including hydrological data generation, reservoir flood routing and dam-break analysis)
• Topographic modelling
• Value engineering
• Economic evaluation (including construction cost estimation and cash-flow estimation)
• Hydraulic equipment design (including spillway gates, control valves, gates and intake works)
• Instrumentation and monitoring systems
• Contract documentation and administration (including pre-qualification, selection of and writing of conditions of contracts, specifications, bills of quantities)
• Construction supervision
• Rehabilitation and remedial works
• Environmental impact assessment

Bulk water conveyance

The transfer of water from storage facilities to the end-users requires a network made up of many components. GIBB has the expertise to provide the services required at any stage. These include:

• Hydraulic analysis and design
• Geotechnical and geological analysis and modeling
• Structural analysis and design
• Hydrological analysis and design
• Pump station electrical and mechanical design
• Value engineering
• Economic evaluation (including construction cost estimation and cash-flow estimation)
• Contract documentation and administration (including pre-qualification, selection and writing of conditions of contracts, specifications, bills of quantities)
• Construction supervision
• Rehabilitation and remedial works
• Environmental impact assessment

Hydroelectric power

GIBB’s in-depth knowledge of and involvement in hydroelectric development, gained from involvement in over a hundred projects worldwide, enables us to offer an extensive array of services.

• Economic and financial evaluation
• Integrated power planning
• Scheme optimisation
• Feasibility studies
• Environmental impact assessment
• Hydraulic analysis and design
• Structural analysis and design (including finite elements analysis, concrete and steelwork design and architectural input)
• Seismic risk analysis
• Geotechnical and geological investigations, analyses and modeling
• Hydrological and energy yield analysis (including hydrological data generation)
• Value engineering
• Hydraulic equipment design (including spillway gates, control valves, gates and intake works)
• Risk assessment
• Turbine, generator and transformer design and optimisation
• Transmission line design and optimisation
• Contract documentation and administration (including pre-qualification, preparing conditions of contracts, specifications and bills of quantities)
• Tunnel and cavern design and supervision

Tunneling and geotechnical services

A wide range of services for various applications, including cut and cover tunnels, engineering audits, site investigations and supervision, slope stability, the design of tunnels, shafts and caverns in hard or soft ground and the use of Tunnel Boring Machines (TBM), with services including:

• Planning, design, bid documentation, project management and site supervision of a variety of tunnels
• Resource based costing and programming for reliable cost estimates and project schedule
• Engineering audits of designs and construction
• Design of caverns and tunnels using state-of-the-art geotechnical software (FLAC 2D and Phase 2, FLAC 3D, UDEC and UNWEDGE and NTNU Fullprof software modeling and other prediction methods used for predicting the performance of hard rock TBMs)