1. Project Background: This project addresses the irrigation and drainage system at the end section of the Guanshan Canal. Over the years, the canal had deteriorated, leading to severe leakage and significant water resource losses. Additionally, the canal’s insufficient flood discharge cross section caused difficulties in discharging runoff during heavy rains, resulting in flooding of nearby farmland and agricultural losses. Furthermore, the lack of a management road hindered emergency response efforts. As a result, the association actively sought funding to improve the situation.
2. Construction Location: Luye Township, Taitung County.
3. Total Project Cost: NT$7,419,000.
4. Construction Period: From December 24, 2003, to April 29, 2004, with a total duration of 132 calendar days.
5. Project Details:
- Lining: 1,396 meters.
- New Jersey barriers: 528 meters.
- Covered structures: 7 units.
- Management road construction: 1,214 meters.
- Slope protection: 180 meters.
- Horizontal beams: 93 units.
- Planting.
1. Water Conservation and Reduced Transmission Losses: The canal was designed to serve dual purposes for flood control and irrigation, with the main line featuring a 2-meter wide and 1.2-meter high concrete lining.
2. Improved Water Access for Farmers and Irrigation Management: To enhance irrigation efficiency, a 60 cm-wide ditch with concrete lining was constructed with four turnout gates.
3. Construction of New Management Road to Improve Local Traffic Conditions and Facilitate Transportation of Agricultural Products and Emergency Flood Control Operations: A 5-meter wide AC road was built, along with seven covered structures. The road was landscaped using biodiversity techniques, ensuring both safety and environmental integration.
4. Respecting Wildlife Habitats and Creating a Greener Living Environment: Along the channel bottom, 93 horizontal beams were installed to dissipate energy and store excess irrigation water, creating living space for aquatic flora and fauna.
1. After construction, the irrigation area significantly improved its water shortage situation, increasing agricultural productivity. Farmers now deeply appreciate the value of water resources and have become volunteer advocates for water conservation.
2. The Huadong Valley, known for its beautiful scenery, is enhanced by the gentle flow of water. Locals often stroll and exercise in the area at dawn and dusk, making it an excellent recreational space.
3. The project integrates with the overall community development, with staff from the Guanshan workstation and local residents responsible for daily environmental maintenance, upkeep, and canal safety reporting. This has strengthened the relationship between the agency and the public.
Significant Benefits:
1. The original trapezoidal canal had severe leakage, with an effective water transmission capacity of only 0.85 CMS. After improvements, the capacity increased to 1.5 CMS, allowing surplus water to be redirected to the downstream Fengyuan Canal, enhancing the value of excess water reuse. The construction of a 1,214-meter management road also improved local traffic and facilitated agricultural transport.
2. The irrigation area, from Xinfeng Village to Ruiyuan Village, covering approximately 400 hectares, is at the end section of the Guanshan Canal. Previously, it could only support rotational irrigation. After improvements, full irrigation is now possible for the second crop season.
3. The catchment area is about 1,400 hectares, with an estimated runoff of 2.5 CMS. The drainage capacity of the engineering design is 3.5 CMS, which reduces the risk of flooding.