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| Trị An Dam | |
|---|---|
| Name | Trị An Dam |
| Official name | Trị An Hydropower Plant |
| Location | Đồng Nai Province, Vietnam |
| Status | Operational |
| Construction began | 1970s |
| Opening | 1986 |
| Owner | Vietnam Electricity |
| Dam type | Concrete gravity |
| Height | 48 m |
| Length | 4,300 m |
| Reservoir capacity | 2,700,000,000 m3 |
| Plant capacity | 400 MW |
Trị An Dam is a large hydroelectric dam and reservoir complex in southern Vietnam, located in Đồng Nai Province on the Đồng Nai River. The project serves as a major source of electrical generation, flood control, and irrigation support for the Southeast region, and is integrated into national energy planning by EVN. Its reservoir forms one of the largest inland lakes in Vietnam and is a focal point for regional development, biodiversity, and tourism.
Trị An Dam is a strategic infrastructure asset operated by Vietnam Electricity and plays a role in the national power grid coordinated with facilities such as Hòa Bình Dam, Yaly Hydropower Station, and Sông Tranh Hydropower Plant. The facility comprises a concrete-gravity dam, spillway system, powerhouse with Francis turbines, and an extensive artificial reservoir. It connects hydrologically and operationally with downstream works on the Đồng Nai River and supports irrigation schemes benefiting provinces including Đồng Nai Province, Bình Dương Province, and Bình Phước Province.
Conceived during the post-war reconstruction era, Trị An's planning involved engineering studies influenced by international projects like Hoover Dam and Itaipu Dam, and technical assistance from firms with ties to Soviet Union and Czechoslovakia expertise in hydropower. Groundbreaking occurred in the late 1970s, with major civil works in the 1980s and commissioning of generating units completed in 1986. Construction involved coordination among regional authorities such as the Ministry of Energy and state-owned enterprises, and mobilized labor and resources from surrounding districts including Vĩnh Cửu District and Trảng Bom District.
The dam is situated within the Dong Nai River basin, draining upland catchments from the Central Highlands and eastern Nam Cát Tiên National Park fringes. The reservoir inundates river valleys and tributaries that previously connected to features like Bà Rịa–Vũng Tàu Province headwaters and lowland plains near Biên Hòa. Seasonal monsoon patterns influenced by the South China Sea and regional climatology determine inflow regimes, while upstream land use in districts such as Tân Phú District and Đạ Huoai District affects sediment yield and watershed runoff.
The reservoir, with a storage capacity of approximately 2.7 billion cubic meters, functions for peaking electricity production, flow regulation for downstream plants, and drought mitigation. Operations are coordinated through EVN control centers and tied into national dispatch frameworks that include links with the National Load Dispatch Center (Vietnam). Water release schedules are adjusted during typhoon seasons associated with Typhoon Durian-class events and coordinated with provincial disaster management offices like those in Đồng Nai Province to reduce flood risk in urban centers such as Ho Chi Minh City and Biên Hòa.
The inundation transformed habitats and created a mosaic of open-water, riparian, and terrestrial-edge ecosystems affecting species common to Cúc Phương National Park and Cat Tien National Park corridors. Aquatic fauna include fish assemblages comparable to those documented in the Mekong River basin, and the reservoir area supports migratory and resident birds with linkages to flyways passing near Vàm Cỏ River wetlands. Environmental management has involved monitoring by agencies like the Ministry of Natural Resources and Environment (Vietnam) and conservation groups, with concerns tied to water quality, reservoir stratification, and impacts on endemic flora from altered flood pulses.
The Trị An reservoir and adjacent landscapes have become a regional destination for boating, angling, and ecotourism, drawing visitors from Ho Chi Minh City, Đồng Nai Province, Bình Dương Province, and Vũng Tàu. Local developments include marinas, picnic sites, and homestay services promoted by district-level tourism boards. Nearby attractions and infrastructure that interact with visitation patterns include Cát Tiên National Park, historical sites in Biên Hòa, and road corridors such as National Route 1A and National Route 20.
The project generated socioeconomic benefits through electricity supply and regional development but also produced resettlement and livelihood disruption for communities in communes of Vĩnh Cửu District and Tân Phú District. Controversies have involved compensation, land-use change, and downstream sediment transport affecting agriculture in riverine districts like Long Khánh. Environmental critics have compared impacts to cases such as Three Gorges Dam and debates persist around cumulative basin planning, biodiversity offsets advocated by IUCN partners, and long-term sedimentation forecasts assessed by technical institutes including the Vietnam Academy of Science and Technology.
Category:Dams in Vietnam Category:Hydroelectric power stations in Vietnam Category:Buildings and structures in Đồng Nai Province