Diamond Hill Reservoirs Relocation (Hong Kong)

Geostatistical Modeling Supports Complex Cavern and Tunnel Design in Hong Kong

The Relocation of Diamond Hill Fresh Water and Saltwater Service Reservoirs involves moving the existing DHSRs into four newly constructed underground rock caverns and the construction of a vehicular access tunnel (645 meters long). The project addresses long-term storage and resilience needs while overcoming geological challenges, including zones of weak and deeply weathered rock. Emprise supported the development of the geological and geotechnical models using geostatistical methods.

Project Scope:	Cavern Construction, Vehicular Access Tunnel construction, Reservoir Relocation, and Geotechnical Design
Unique Features:	Modeling of Complex Geological Conditions, Iterative Model, Use of Advanced Statistical Tools
Our Services:	Geostatistical Modeling, Statistical Analysis, and Geological Analysis
Emprise Personnel:	Jacob Grasmick Noah Kimmes

Impacts & Benfits

• Reduced Uncertainty: Delivered reliable forecasts of weak rock and permeability zones.

• Data-Driven Decisions: Enabled adaptive design refinement as new investigation data emerged.

• Risk Mitigation: Anticipated subsurface challenges to support safer cavern and tunnel design.

• Community Value: Provided resilient water infrastructure supporting Hong Kong’s growing population.

Project Gallery

• 

• 

• 

• 

• 

• 

Project Summary

The Hong Kong Water Supplies Department undertook the relocation of the Diamond Hill Fresh Water and Saltwater Service Reservoirs into newly constructed underground rock caverns, supported by a 645-meter vehicular access tunnel. Emprise Concepts provided geostatistical modeling and geological analysis to address complex subsurface conditions, ensuring long-term water storage resilience and safe construction within zones of weak and deeply weathered rock.

Project Writeup

Emprise Concepts applied advanced geostatistical modeling to support AtkinsRéalis and the Hong Kong Water Supplies Department in managing subsurface uncertainty. By integrating statistical tools with staged investigation data, the team reduced risk and improved design confidence for tunnel and cavern excavation. This data-driven approach enhanced safety and efficiency in one of Hong Kong’s most geologically challenging urban infrastructure projects.