I. Project Innovation

(I) Innovative Application of Seepage Prevention Method in Storage Tanks Considering the site's geology, which is primarily composed of gravel and sand layers with a lack of usable clay, this project innovatively employs a ground clay blanket (GCL) seepage prevention method instead of traditional clay paving. This method not only allows for rapid construction and possesses self-healing capabilities but also reduces the large-scale transportation of clay and carbon emissions, combining environmental friendliness with durability.

(II) Design of a Tank Bottom Dredging Warning System To prevent subsequent mechanical dredging operations from damaging the ground clay blanket at the bottom of the tank, this project installs dredging warning signs and warning steel pipes every 20 meters along the bottom of the tank. This effectively reminds operators to control the dredging depth, extends the service life of the seepage prevention facilities, and balances maintenance convenience with facility durability.

(III) Intelligent Irrigation Management Water level gauges, monitoring systems, and remote gate control equipment are installed in the storage tanks and sedimentation basins. Real-time monitoring of water levels and gate operation via the cloud significantly improves irrigation scheduling efficiency, reduces inspection manpower and management costs, and establishes a smart farmland water conservancy management model.

(iv) Eco-friendly design Based on the results of the ecological assessment, 8.2-meter-high raptor perches were constructed for protected birds of prey such as the scops owl and the black-winged kite, with the foundations deepened to 1.5 meters to improve wind resistance. At the same time, existing trees were preserved and additional greening was added, so that the project can serve the functions of irrigation, ecological conservation and landscape.

II. Challenges of the Project

(I) Encountering Large Amounts of Buried Waste During Construction After excavation, a large amount of unidentified waste was discovered buried within the project site, necessitating a halt to construction and coordination with the Gaoshu Township Office and environmental protection authorities for disposal. The organizing agency proactively assisted in developing a waste removal plan and coordinating funding, overcoming construction obstacles, and ultimately completing the removal and resuming construction.

(II) Balancing Project Schedule and Farmers' Irrigation Needs During construction, it was essential to maintain a stable water supply to the irrigation area. Through adjustments to the construction schedule, zoned construction, and active coordination with farmers, the project was completed on schedule within 420 calendar days, despite the added waste disposal work and changes in funding, demonstrating strong project management capabilities.

(III) Adjustment of Sand Removal Facility Plan The original design required breaching the levee to construct a sand removal channel. After multiple consultations with the river management authority, the existing drainage culverts were used for sand removal. This not only avoided damaging the levee structure but also balanced river safety with project economics, showcasing the effectiveness of inter-agency coordination.

(iv) Challenges in Improving High-Sediment Water Sources The Zhuokou Creek has a high sediment content and its turbidity increases dramatically during heavy rains. The project effectively improves irrigation water quality and reduces canal siltation through an integrated design that includes sedimentation basins, storage tanks, hydraulic sediment removal, and diversion irrigation.

III. Project Comprehensiveness

(I) Balancing Irrigation, Water Quality, and Water Supply Resilience This project combines sedimentation tanks, regulating reservoirs, and a dual-system irrigation and water supply model. It provides stable water quality during normal times, and after heavy rainfall, the regulating reservoirs supply clean water, effectively improving the resilience and reliability of the irrigation area's water supply.

(II) Complete Maintenance and Management Mechanism Standard Operating Procedures (SOPs) and Maintenance Management Manuals (SMPs) have been established, and operational training has been completed, covering procedures such as sand removal, dredging, flood control, and emergency response, ensuring sustainable and effective operation by subsequent management units.

(III) Energy Conservation, Carbon Reduction, and Circular Economy A semi-excavation and semi-fill earthwork balance design is adopted, with almost all excavation and filling work utilized on-site. Local gravel is used as the grid riprap material, significantly reducing material transportation and spoil disposal, promoting low-carbon construction and resource recycling.

(IV) Integration with Landscape and Public Space In line with the overall planning of the local waterfront park, a circular walking path, green vegetation, and landscaped spaces will be constructed around the reservoir, enabling it to serve multiple functions including irrigation, disaster prevention, ecology, and recreation, thereby enhancing its public use value and the quality of the local environment.

(V) Improved Quality Management System A three-tiered quality control system will be implemented. Supervision, construction, and material inspection will all be conducted in accordance with regulations. The pass rate for both random inspections and self-inspections will exceed 96%, and the material testing pass rate will be 100%. All deficiencies will be rectified within the stipulated timeframes to ensure project quality.

Outstanding Deeds of the Project

1. Despite encountering a major emergency involving the landfilling of waste during construction, the project was handled effectively through inter-agency cooperation and completed on schedule, demonstrating outstanding project management and crisis response capabilities.

2. Promoting low-carbon and sustainable engineering concepts, the project employed bentonite blankets, impermeable designs, earthwork balancing, and the reuse of on-site materials, estimating a carbon reduction benefit of over 500,000 kg of CO₂e. Simultaneously, trees were preserved and replanted, enhancing ecological and carbon sequestration benefits.

3. Integrating local waterfront park planning with citizen participation mechanisms, the project considered irrigation, disaster prevention, landscaping, and recreational functions, creating diverse public benefits and improving the overall environmental quality and usability for the public.

Navigation settings (22.879490, 120.639258)

▲ Northbound National Highway 10, heading towards Zuoying/Qishan, Exit 25 towards Ligang, turn right onto Fuxing Road/County Road 181, turn left onto Xinfa Highway/Provincial Highway 27, turn left onto Mingyi Road, turn right onto Jiuliao No. 1 Embankment.

▲ Southbound National Highway 3, heading towards Baihe, Exit at Yanchao Interchange (National Highway 10 Exit) towards Qishan, Exit 25 towards Ligang, turn right onto Fuxing Road/County Road 181, turn left onto Xinfa Highway/Provincial Highway 27, turn left onto Mingyi Road, turn right onto Jiuliao No. 1 Embankment.

Public Works Section, Pingtung Management Office, Farmland Irrigation Agency, Ministry of Agriculture  - Tel: 08-7322123

Gaoshu Work Station, Pingtung Management Office, Farmland Irrigation Agency, Ministry of Agriculture - Tel: 08-7962046