Overview
The Uma Oya Multipurpose Development Project is a large-scale infrastructure initiative in Sri Lanka designed to enhance water management, hydropower generation, and agricultural irrigation. The project diverts water from the Uma Oya River to generate 120 MW of hydroelectric power while also improving water distribution for farming in the southeastern dry regions. It includes two RCC dams, a reservoir system, and a complex network of tunnels to optimize water resources for both energy production and irrigation. Despite challenges such as environmental and tunnelling concerns, the project plays a key role in Sri Lanka’s renewable energy and water management strategy.
Challenge
The project faced several engineering challenges, including tunnel stability, groundwater inflow, and geological instability due to complex rock formations. Excessive water leakage from tunneling caused land subsidence and water shortages in nearby communities, requiring mitigation measures such as advanced grouting and realignment strategies. Additionally, managing high-pressure water flows and ensuring structural stability in varying geological conditions posed significant technical hurdles throughout construction.
Solution
To address the engineering challenges of the Uma Oya Multipurpose Development Project, solutions included advanced tunnel support systems, grouting techniques to control groundwater inflow, realignment of tunnel sections, and reinforced structural designs. Additionally, pressure management strategies and continuous geotechnical monitoring were implemented to enhance stability and mitigate risks.
Client
Ministry of Mahaweli Development and Environment of Sri Lanka
Location
Sri Lanka, Bandarawela
Disclaimer: The project was not undertaken by GeoTails Consulting. The insights and expertise shared are based on prior involvement of our team during a previous consultancy engagement, before the founding of GeoTails.
