This project encompassed the manufacturing, installation, and integration of gate structures and mechanical & electrical equipment for the water diversion facility weir of the Wu River Niaozuitan Artificial Lake Project, including two radial gates (each with a span of 9.6 metres) and one shell-type gate (span of 30 metres — the largest single-span gate structure on record in Taiwan). The shell-type gate leaf weighs 39.12 tonnes; BIM technology was adopted for design coordination, lifting simulation, and construction interface clash detection, ensuring the safe lifting and precise positioning of this large-scale gate structure. Under normal conditions, the radial gates handle sediment flushing operations, while the shell-type gate is activated during typhoon flood events to form the water retention pool — balancing operational flexibility with reduced maintenance frequency.
To address the land subsidence problem in Changhua and Nantou caused by long-term over-reliance on groundwater extraction, the government initiated the Wu River Niaozuitan Artificial Lake Project to develop surface water resources from the Wu River as a substitute for groundwater, thereby promoting groundwater conservation. The water diversion facility weir serves as the critical upstream control point regulating the volume and quality of water entering the lake. The gate structures and mechanical & electrical systems delivered by Nan Dao Engineering form the core equipment for stable sediment flushing and water intake operations at the weir. Through this project, the weir is able to reliably draw water under normal conditions and safely discharge floodwater and form the retention pool during typhoon and flood events, underpinning the overall water supply resilience of the diversion scheme and contributing to the improvement of land subsidence conditions in the region.
