Guidelines on advanced methods to minimise geological uncertainty in hydropower projects
CEA has set out advanced investigation methods for hydro tunnels and water conductor systems, and a dedicated budget head to pay for them.
Why it matters. Geological surprises are the main cause of hydro delays and cost overruns; better investigation up front reduces both.
What changes
- Recommends remote sensing, aerial electromagnetic surveys, seismic tomography and directional core drilling.
- Geo-hydrological studies for tunnels with more than 300 m of vertical cover.
- Real-time ground prediction during construction and site-specific rock mass classification.
- Applies across investigation, tender and construction stages.
- New budget head, 'Advanced Geo-technical Investigations for Water Conductor System', sized by capacity, cost and tunnel length.
Who is affected
Hydro developers · Tunnel contractors · Bidders · Design consultants
Sources
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